/* roulang page: index */
:root {
            --primary: #2D6FA3;
            --primary-dark: #255D8A;
            --primary-light: #3F83C4;
            --primary-pale: #EBF3FA;
            --bg: #F5F8FB;
            --bg-alt: #EDF2F7;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-weak: #94A3B8;
            --accent: #E6A23C;
            --accent-green: #26A69A;
            --card-border: rgba(45, 111, 163, 0.08);
            --card-shadow: 0 8px 22px rgba(30, 41, 59, 0.06);
            --card-shadow-hover: 0 14px 34px rgba(30, 41, 59, 0.1);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 20px;
            --radius-img: 10px;
            --section-pad: 88px;
            --section-pad-mobile: 52px;
            --footer-bg: #0F1B29;
            --font-stack: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: 0.22s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.72;
            margin: 0;
            padding: 0;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }
        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--section-pad) 0;
        }
        .section--alt {
            background: #fff;
        }
        .section-heading {
            margin-bottom: 44px;
        }
        .section-heading h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin: 0 0 12px;
        }
        .section-heading p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0;
            line-height: 1.75;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-pale);
            border-radius: var(--radius-badge);
            padding: 5px 14px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        /* Header & Nav */
        .site-header {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(45, 111, 163, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 8px rgba(30, 41, 59, 0.04);
        }
        .site-header .container-wide {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            flex-wrap: nowrap;
            gap: 20px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .brand-logo:hover {
            color: var(--primary-dark);
        }
        .brand-badge {
            font-size: 0.65rem;
            font-weight: 700;
            color: var(--accent);
            background: rgba(230, 162, 60, 0.12);
            padding: 3px 8px;
            border-radius: 4px;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .main-nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }
        .main-nav-desktop a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition);
        }
        .main-nav-desktop a:hover,
        .main-nav-desktop a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .lang-toggle {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            border: 1px solid rgba(45, 111, 163, 0.15);
            border-radius: 20px;
            padding: 2px;
            gap: 2px;
        }
        .lang-toggle button {
            background: transparent;
            border: none;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 6px 12px;
            border-radius: 18px;
            cursor: pointer;
            transition: all var(--transition);
            letter-spacing: 0.03em;
        }
        .lang-toggle button.active {
            background: var(--primary);
            color: #fff;
        }
        .lang-toggle button:hover:not(.active) {
            background: var(--primary-pale);
            color: var(--primary);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.92rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            line-height: 1.3;
            white-space: nowrap;
        }
        .btn:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn:active {
            transform: translateY(1px);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-pale);
            color: var(--primary-dark);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.82rem;
        }
        .btn-lg {
            padding: 14px 28px;
            font-size: 1rem;
            border-radius: 8px;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: #d4952f;
            color: #fff;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            color: var(--text);
            font-size: 1.3rem;
            line-height: 1;
        }
        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid rgba(45, 111, 163, 0.08);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 10px 12px;
            border-radius: 6px;
            transition: all var(--transition);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }
        .mobile-menu .lang-toggle {
            margin-top: 12px;
            align-self: flex-start;
        }

        /* Hero */
        .hero {
            background: linear-gradient(135deg, #FFFFFF 0%, #EEF4FA 100%);
            position: relative;
            overflow: hidden;
            padding: 72px 0 64px;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 440px;
            height: 440px;
            background: radial-gradient(circle, rgba(45, 111, 163, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-inner {
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }
        .hero-copy {
            flex: 1 1 480px;
            max-width: 600px;
        }
        .hero-copy h1 {
            font-size: 2.85rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin: 0 0 20px;
            color: var(--text);
            line-height: 1.22;
        }
        .hero-copy h1 .hl {
            color: var(--primary);
        }
        .hero-copy .hero-sub {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin: 0 0 28px;
            max-width: 540px;
            line-height: 1.75;
        }
        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 26px;
        }
        .hero-metrics {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }
        .hero-metric {
            text-align: left;
        }
        .hero-metric .num {
            font-size: 1.65rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .hero-metric .label {
            font-size: 0.82rem;
            color: var(--text-secondary);
        }
        .hero-visual {
            flex: 1 1 420px;
            max-width: 520px;
            position: relative;
        }
        .hero-visual img {
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow-hover);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/10;
        }
        .hero-card-overlay {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            border-radius: 10px;
            padding: 16px 20px;
            box-shadow: 0 6px 18px rgba(30, 41, 59, 0.1);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }
        .hero-card-overlay .hc-text {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
        }
        .hero-card-overlay .hc-tag {
            font-size: 0.72rem;
            font-weight: 700;
            color: #fff;
            background: var(--accent);
            padding: 4px 10px;
            border-radius: 20px;
            white-space: nowrap;
        }

        /* Floating CTA Bar */
        .floating-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(15, 27, 41, 0.96);
            backdrop-filter: blur(12px);
            padding: 12px 20px;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.16);
            transform: translateY(100%);
            transition: transform 0.35s ease;
        }
        .floating-cta.visible {
            transform: translateY(0);
        }
        .floating-cta-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .floating-cta-text {
            color: #fff;
            font-size: 0.92rem;
            font-weight: 500;
        }
        .floating-cta-text strong {
            color: var(--accent);
            font-weight: 700;
        }

        /* Pain Points */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }
        .pain-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            padding: 26px 24px;
            box-shadow: var(--card-shadow);
            transition: all var(--transition);
        }
        .pain-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .pain-card .pain-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: #FEF2E2;
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .pain-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--text);
        }
        .pain-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        /* Solution */
        .solution-block {
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 48px 44px;
            margin-bottom: 28px;
        }
        .solution-block .solution-copy {
            flex: 1 1 420px;
        }
        .solution-block .solution-copy h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 0 14px;
            color: var(--text);
        }
        .solution-block .solution-copy p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 14px;
        }
        .solution-block .solution-visual {
            flex: 1 1 360px;
            max-width: 440px;
        }
        .solution-block .solution-visual img {
            border-radius: var(--radius-img);
            box-shadow: var(--card-shadow);
            aspect-ratio: 16/9;
            object-fit: cover;
            width: 100%;
        }
        .solution-block.reverse {
            flex-direction: row-reverse;
        }

        /* Stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }
        .stat-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 26px 20px;
            text-align: center;
            transition: all var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }
        .stat-card .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-card .stat-label {
            font-size: 0.88rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Deep Content */
        .deep-content {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 48px 48px 44px;
            display: flex;
            gap: 36px;
            flex-wrap: wrap;
            align-items: flex-start;
        }
        .deep-content .deep-text {
            flex: 1 1 480px;
        }
        .deep-content .deep-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text);
        }
        .deep-content .deep-text p {
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin: 0 0 16px;
        }
        .deep-content .deep-img {
            flex: 1 1 340px;
            max-width: 420px;
        }
        .deep-content .deep-img img {
            border-radius: var(--radius-img);
            box-shadow: var(--card-shadow);
            aspect-ratio: 4/3;
            object-fit: cover;
            width: 100%;
        }

        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 28px 24px;
            transition: all var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--card-shadow-hover);
        }
        .testimonial-card .stars {
            color: var(--accent);
            font-size: 0.85rem;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .testimonial-card blockquote {
            font-size: 0.94rem;
            color: var(--text);
            line-height: 1.75;
            margin: 0 0 14px;
            quotes: none;
        }
        .testimonial-card .source {
            font-size: 0.82rem;
            color: var(--text-secondary);
            font-weight: 600;
            border-top: 1px solid rgba(45, 111, 163, 0.08);
            padding-top: 12px;
        }

        /* News */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 28px;
            align-items: start;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .news-item {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 20px 22px;
            transition: all var(--transition);
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            justify-content: space-between;
        }
        .news-item:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateX(3px);
        }
        .news-item .news-date {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-pale);
            padding: 4px 10px;
            border-radius: 20px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .news-item .news-title {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text);
            flex: 1 1 260px;
        }
        .news-item .news-desc {
            font-size: 0.86rem;
            color: var(--text-secondary);
            flex: 1 1 100%;
            line-height: 1.65;
        }
        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-sidebar-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 22px 20px;
        }
        .news-sidebar-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin: 0 0 12px;
            color: var(--text);
        }
        .news-sidebar-card ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .news-sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid rgba(45, 111, 163, 0.06);
            font-size: 0.88rem;
        }
        .news-sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .news-sidebar-card ul li a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .news-sidebar-card ul li a:hover {
            color: var(--primary);
        }

        /* Brand Intro */
        .brand-intro {
            background: linear-gradient(135deg, #FFFFFF 0%, #F0F6FB 100%);
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 40px 42px;
        }
        .brand-intro h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text);
        }
        .brand-intro p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin: 0 0 12px;
        }

        /* Hot Topics */
        .topic-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .topic-tag {
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-pale);
            padding: 8px 16px;
            border-radius: 20px;
            border: 1px solid rgba(45, 111, 163, 0.12);
            transition: all var(--transition);
            cursor: pointer;
        }
        .topic-tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* FAQ */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .accordion-item {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .accordion-item.active {
            background: #EBF3FA;
            border-color: rgba(45, 111, 163, 0.18);
        }
        .accordion-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text);
            gap: 12px;
            user-select: none;
        }
        .accordion-head .icon {
            font-size: 0.85rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .accordion-item.active .accordion-head .icon {
            transform: rotate(180deg);
        }
        .accordion-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .accordion-body-inner {
            padding: 0 22px 20px;
            font-size: 0.94rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #1E3A5F 0%, #2D6FA3 100%);
            border-radius: 16px;
            padding: 52px 48px;
            text-align: center;
            box-shadow: 0 18px 40px rgba(45, 111, 163, 0.22);
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin: 0 0 14px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.82);
            max-width: 640px;
            margin: 0 auto 26px;
            line-height: 1.75;
        }
        .cta-section .btn {
            margin: 0 6px;
        }
        .cta-section .btn-outline {
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
        }
        .cta-section .btn-outline:hover {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
        }

        /* Footer */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.72);
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin: 0 0 14px;
            letter-spacing: 0.02em;
        }
        .site-footer p {
            font-size: 0.88rem;
            line-height: 1.7;
            margin: 0 0 10px;
        }
        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer ul li {
            margin-bottom: 8px;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.86rem;
            transition: color var(--transition);
        }
        .site-footer ul li a:hover {
            color: #fff;
        }
        .footer-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            display: inline-block;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.8rem;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* Misc */
        .text-accent {
            color: var(--accent);
            font-weight: 700;
        }
        .text-green {
            color: var(--accent-green);
            font-weight: 700;
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .divider-soft {
            height: 1px;
            background: rgba(45, 111, 163, 0.08);
            margin: 0;
            border: none;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav-desktop {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .mobile-menu.open {
                display: flex;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-inner {
                gap: 32px;
            }
            .hero-copy h1 {
                font-size: 2.2rem;
            }
            .section {
                padding: 60px 0;
            }
            .solution-block {
                padding: 32px 28px;
            }
            .deep-content {
                padding: 32px 28px;
            }
        }
        @media (max-width: 640px) {
            .container,
            .container-wide {
                padding: 0 16px;
            }
            .section {
                padding: var(--section-pad-mobile) 0;
            }
            .hero {
                padding: 48px 0 40px;
            }
            .hero-copy h1 {
                font-size: 1.72rem;
                line-height: 1.3;
            }
            .hero-copy .hero-sub {
                font-size: 0.96rem;
            }
            .hero-metrics {
                gap: 18px;
            }
            .hero-metric .num {
                font-size: 1.3rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card .stat-num {
                font-size: 1.6rem;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .pain-grid {
                grid-template-columns: 1fr;
            }
            .solution-block {
                padding: 24px 20px;
                gap: 24px;
            }
            .solution-block.reverse {
                flex-direction: column-reverse;
            }
            .deep-content {
                padding: 24px 20px;
                gap: 24px;
            }
            .news-item {
                padding: 16px 16px;
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-section {
                padding: 36px 24px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .floating-cta-text {
                font-size: 0.82rem;
            }
            .floating-cta-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .brand-logo {
                font-size: 1.2rem;
            }
            .header-actions .btn-sm {
                padding: 6px 12px;
                font-size: 0.76rem;
            }
            .lang-toggle button {
                padding: 4px 8px;
                font-size: 0.7rem;
            }
            .section-heading h2 {
                font-size: 1.5rem;
            }
            .hero-card-overlay {
                position: static;
                margin-top: 12px;
                box-shadow: none;
                background: #fff;
                border: 1px solid var(--card-border);
            }
        }
        @media (max-width: 380px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .hero-cta-group {
                flex-direction: column;
            }
            .btn-lg {
                padding: 12px 20px;
                font-size: 0.9rem;
            }
        }

/* roulang page: category2 */
:root {
      --primary: #2D6FA3;
      --primary-dark: #255D8A;
      --primary-light: #3F83C4;
      --primary-pale: #EBF3FA;
      --bg: #F5F8FB;
      --bg-alt: #EDF2F7;
      --text: #1E293B;
      --text-secondary: #64748B;
      --text-weak: #94A3B8;
      --accent: #E6A23C;
      --accent-green: #26A69A;
      --card-border: rgba(45, 111, 163, 0.08);
      --card-shadow: 0 8px 22px rgba(30, 41, 59, 0.06);
      --card-shadow-hover: 0 14px 34px rgba(30, 41, 59, 0.1);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-badge: 20px;
      --radius-img: 10px;
      --section-pad: 88px;
      --section-pad-mobile: 52px;
      --footer-bg: #0F1B29;
      --font-stack: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      --transition: 0.22s ease;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }
    body {
      font-family: var(--font-stack);
      background: var(--bg);
      color: var(--text);
      line-height: 1.72;
      margin: 0;
      padding: 0;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: var(--primary);
      text-decoration: none;
      transition: color var(--transition);
    }
    a:hover {
      color: var(--primary-dark);
      text-decoration: none;
    }
    button,
    input,
    textarea,
    select {
      font-family: var(--font-stack);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .container-wide {
      max-width: 1320px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .section {
      padding: var(--section-pad) 0;
    }
    .section--alt {
      background: #fff;
    }
    .section--pale {
      background: var(--primary-pale);
    }
    .section-heading {
      margin-bottom: 44px;
    }
    .section-heading h2 {
      font-size: 2rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text);
      margin: 0 0 12px;
    }
    .section-heading p {
      font-size: 1.05rem;
      color: var(--text-secondary);
      max-width: 680px;
      margin: 0;
      line-height: 1.75;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 0.06em;
      color: var(--primary);
      background: var(--primary-pale);
      border-radius: var(--radius-badge);
      padding: 5px 14px;
      margin-bottom: 16px;
      text-transform: uppercase;
    }

    /* Header & Nav */
    .site-header {
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(45, 111, 163, 0.08);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 1px 8px rgba(30, 41, 59, 0.04);
    }
    .site-header .container-wide {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 68px;
      flex-wrap: nowrap;
      gap: 20px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .brand-logo {
      font-size: 1.45rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
      white-space: nowrap;
    }
    .brand-logo:hover {
      color: var(--primary-dark);
    }
    .brand-badge {
      font-size: 0.65rem;
      font-weight: 700;
      color: var(--accent);
      background: rgba(230, 162, 60, 0.12);
      padding: 3px 8px;
      border-radius: 4px;
      letter-spacing: 0.04em;
      white-space: nowrap;
    }
    .main-nav-desktop {
      display: flex;
      align-items: center;
      gap: 4px;
      flex-wrap: nowrap;
    }
    .main-nav-desktop a {
      font-size: 0.88rem;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 8px 12px;
      border-radius: 6px;
      white-space: nowrap;
      transition: all var(--transition);
    }
    .main-nav-desktop a:hover,
    .main-nav-desktop a.active {
      color: var(--primary);
      background: var(--primary-pale);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .lang-toggle button {
      background: transparent;
      border: none;
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--text-secondary);
      padding: 6px 12px;
      border-radius: 18px;
      cursor: pointer;
      transition: all var(--transition);
      letter-spacing: 0.03em;
    }
    .lang-toggle button.active {
      background: var(--primary);
      color: #fff;
    }
    .lang-toggle button:hover:not(.active) {
      background: var(--primary-pale);
      color: var(--primary);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 0.92rem;
      font-weight: 600;
      letter-spacing: 0.02em;
      padding: 11px 22px;
      border-radius: var(--radius-btn);
      border: 1px solid transparent;
      cursor: pointer;
      transition: all var(--transition);
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      border-color: var(--primary-dark);
      color: #fff;
    }
    .btn-secondary {
      background: transparent;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-secondary:hover {
      background: var(--primary-pale);
      border-color: var(--primary);
      color: var(--primary-dark);
    }
    .btn-sm {
      padding: 8px 16px;
      font-size: 0.85rem;
    }
    .btn:focus,
    .btn:active:focus {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }
    .btn:active {
      transform: translateY(1px);
    }
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--primary);
      cursor: pointer;
      padding: 4px 8px;
    }
    .mobile-menu {
      display: none;
      background: #fff;
      border-top: 1px solid var(--card-border);
      padding: 16px 24px;
      flex-direction: column;
      gap: 8px;
    }
    .mobile-menu a {
      padding: 10px 12px;
      border-radius: 8px;
      color: var(--text-secondary);
      font-weight: 500;
    }
    .mobile-menu a.active,
    .mobile-menu a:hover {
      background: var(--primary-pale);
      color: var(--primary);
    }
    .mobile-menu .lang-toggle {
      margin-top: 12px;
      display: flex;
      gap: 6px;
    }

    /* Page Hero */
    .page-hero {
      position: relative;
      padding: 100px 0 90px;
      background-color: var(--text);
      background-image: url('/assets/images/coverpic/cover-2.webp');
      background-size: cover;
      background-position: center 40%;
      color: #fff;
      text-align: left;
      overflow: hidden;
    }
    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(15,27,41,0.9) 0%, rgba(15,27,41,0.65) 50%, rgba(15,27,41,0.3) 100%);
      z-index: 1;
    }
    .page-hero .container {
      position: relative;
      z-index: 2;
    }
    .page-hero h1 {
      font-size: 3rem;
      font-weight: 800;
      letter-spacing: -0.03em;
      margin: 0 0 16px;
      line-height: 1.2;
      color: #fff;
    }
    .page-hero .subtitle {
      font-size: 1.2rem;
      max-width: 640px;
      margin-bottom: 28px;
      color: rgba(255,255,255,0.85);
      line-height: 1.7;
    }
    .page-hero .btn-group {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      margin-bottom: 28px;
    }
    .hero-stats {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
    }
    .hero-stat {
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(6px);
      border-radius: 12px;
      padding: 12px 18px;
      color: #fff;
      font-size: 0.9rem;
    }
    .hero-stat strong {
      display: block;
      font-size: 1.4rem;
      font-weight: 700;
    }

    /* Breadcrumb */
    .breadcrumb {
      font-size: 0.85rem;
      color: var(--text-secondary);
      margin-bottom: 12px;
    }
    .breadcrumb a {
      color: var(--text-secondary);
    }
    .breadcrumb a:hover {
      color: var(--primary);
    }
    .breadcrumb span {
      margin: 0 6px;
    }

    /* Intro section */
    .intro-section {
      background: #fff;
    }
    .intro-text {
      font-size: 1.05rem;
      line-height: 1.85;
      color: var(--text-secondary);
      max-width: 850px;
      margin: 0 auto;
    }

    /* Alternating feature rows */
    .feature-row {
      display: flex;
      align-items: center;
      gap: 40px;
      margin-bottom: 56px;
    }
    .feature-row.reverse {
      flex-direction: row-reverse;
    }
    .feature-img {
      flex: 1 1 45%;
      border-radius: var(--radius-img);
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }
    .feature-img img {
      width: 100%;
      height: 260px;
      object-fit: cover;
    }
    .feature-content {
      flex: 1 1 50%;
    }
    .feature-content h3 {
      font-size: 1.6rem;
      font-weight: 700;
      letter-spacing: -0.01em;
      margin: 0 0 12px;
      color: var(--text);
    }
    .feature-content p {
      color: var(--text-secondary);
      margin-bottom: 16px;
    }
    .feature-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin-top: 8px;
    }
    .feature-tag {
      background: var(--primary-pale);
      color: var(--primary);
      padding: 4px 12px;
      border-radius: var(--radius-badge);
      font-size: 0.75rem;
      font-weight: 600;
    }

    /* Steps */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 32px;
    }
    .step-card {
      background: #fff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--card-shadow);
      transition: all var(--transition);
    }
    .step-card:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-3px);
    }
    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #fff;
      font-weight: 700;
      border-radius: 50%;
      margin-bottom: 14px;
    }
    .step-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin: 0 0 8px;
    }
    .step-card p {
      color: var(--text-secondary);
      font-size: 0.92rem;
      margin: 0;
    }

    /* FAQ */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--card-border);
      border-radius: 10px;
      margin-bottom: 12px;
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: all var(--transition);
    }
    .faq-question {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 20px 24px;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: background var(--transition);
    }
    .faq-question:hover {
      background: var(--primary-pale);
    }
    .faq-question .fa-chevron-down {
      transition: transform var(--transition);
      font-size: 0.9rem;
      color: var(--text-secondary);
    }
    .faq-item.active .fa-chevron-down {
      transform: rotate(180deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, background 0.25s ease;
      background: #fff;
    }
    .faq-item.active .faq-answer {
      max-height: 240px;
      background: var(--primary-pale);
    }
    .faq-answer p {
      padding: 0 24px 20px;
      margin: 0;
      color: var(--text-secondary);
      line-height: 1.75;
    }

    /* CTA */
    .cta-section {
      background: var(--primary);
      color: #fff;
      text-align: center;
      padding: 70px 0;
    }
    .cta-section h2 {
      color: #fff;
      margin-bottom: 14px;
      font-size: 2rem;
      font-weight: 700;
    }
    .cta-section p {
      color: rgba(255,255,255,0.9);
      max-width: 620px;
      margin: 0 auto 26px;
    }
    .cta-section .btn-white {
      background: #fff;
      color: var(--primary);
      border-color: #fff;
    }
    .cta-section .btn-white:hover {
      background: var(--primary-pale);
      color: var(--primary-dark);
    }

    /* Footer */
    .site-footer {
      background: var(--footer-bg);
      color: #fff;
      padding: 60px 0 0;
    }
    .site-footer .container {
      padding-bottom: 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand {
      font-size: 1.3rem;
      font-weight: 800;
      color: #fff;
      display: block;
      margin-bottom: 12px;
    }
    .site-footer p {
      color: rgba(255,255,255,0.7);
      font-size: 0.92rem;
      line-height: 1.7;
    }
    .site-footer h4 {
      color: #fff;
      font-size: 1rem;
      font-weight: 600;
      margin: 0 0 16px;
    }
    .site-footer ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .site-footer ul li {
      margin-bottom: 10px;
    }
    .site-footer ul a {
      color: rgba(255,255,255,0.7);
      font-size: 0.9rem;
    }
    .site-footer ul a:hover {
      color: #fff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      justify-content: space-between;
      font-size: 0.8rem;
      color: rgba(255,255,255,0.6);
    }
    .footer-bottom span {
      white-space: nowrap;
    }
    .footer-bottom a {
      color: rgba(255,255,255,0.6);
      margin: 0 4px;
    }
    .footer-bottom a:hover {
      color: #fff;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .main-nav-desktop {
        display: none;
      }
      .nav-toggle {
        display: block;
      }
      .header-actions .lang-toggle {
        display: none;
      }
      .mobile-menu {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        z-index: 99;
        box-shadow: 0 12px 24px rgba(0,0,0,0.08);
      }
      .mobile-menu.open {
        display: flex;
      }
      .feature-row,
      .feature-row.reverse {
        flex-direction: column;
        gap: 24px;
      }
      .feature-img img {
        height: 220px;
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .page-hero h1 {
        font-size: 2.4rem;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
    }
    @media (max-width: 640px) {
      :root {
        --section-pad: var(--section-pad-mobile);
      }
      .page-hero {
        padding: 70px 0 60px;
      }
      .page-hero h1 {
        font-size: 2rem;
      }
      .page-hero .subtitle {
        font-size: 1rem;
      }
      .hero-stats {
        gap: 12px;
      }
      .hero-stat {
        padding: 10px 14px;
        font-size: 0.8rem;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
      .btn {
        width: 100%;
        justify-content: center;
      }
      .header-actions .btn-primary {
        display: none;
      }
    }

/* roulang page: category1 */
:root {
            --primary: #2D6FA3;
            --primary-dark: #255D8A;
            --primary-light: #3F83C4;
            --primary-pale: #EBF3FA;
            --bg: #F5F8FB;
            --bg-alt: #EDF2F7;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-weak: #94A3B8;
            --accent: #E6A23C;
            --accent-green: #26A69A;
            --card-border: rgba(45, 111, 163, 0.08);
            --card-shadow: 0 8px 22px rgba(30, 41, 59, 0.06);
            --card-shadow-hover: 0 14px 34px rgba(30, 41, 59, 0.1);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 20px;
            --radius-img: 10px;
            --section-pad: 88px;
            --section-pad-mobile: 52px;
            --footer-bg: #0F1B29;
            --font-stack: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: 0.22s ease;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.72;
            margin: 0;
            padding: 0;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-pad) 0;
        }

        .section--alt {
            background: #fff;
        }

        .section-heading {
            margin-bottom: 44px;
        }

        .section-heading h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin: 0 0 12px;
        }

        .section-heading p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0;
            line-height: 1.75;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-pale);
            border-radius: var(--radius-badge);
            padding: 5px 14px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        /* Header & Nav */
        .site-header {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(45, 111, 163, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 8px rgba(30, 41, 59, 0.04);
        }

        .site-header .container-wide {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            flex-wrap: nowrap;
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--primary-dark);
        }

        .brand-badge {
            font-size: 0.65rem;
            font-weight: 700;
            color: var(--accent);
            background: rgba(230, 162, 60, 0.12);
            padding: 3px 8px;
            border-radius: 4px;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .main-nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }

        .main-nav-desktop a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .main-nav-desktop a:hover,
        .main-nav-desktop a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .lang-toggle button {
            background: transparent;
            border: none;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 6px 12px;
            border-radius: 18px;
            cursor: pointer;
            transition: all var(--transition);
            letter-spacing: 0.03em;
        }

        .lang-toggle button.active {
            background: var(--primary);
            color: #fff;
        }

        .lang-toggle button:hover:not(.active) {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.92rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
        }

        .btn-primary:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-primary:active {
            transform: translateY(1px);
            background: var(--primary-dark);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-pale);
            color: var(--primary-dark);
            border-color: var(--primary);
        }

        .btn-secondary:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 0.82rem;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--card-border);
            border-radius: 6px;
            color: var(--text-secondary);
            width: 40px;
            height: 40px;
            font-size: 1.1rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 12px 24px 20px;
            background: #fff;
            border-top: 1px solid var(--card-border);
            box-shadow: 0 20px 40px rgba(30, 41, 59, 0.08);
        }

        .mobile-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 10px 12px;
            border-radius: 6px;
            transition: all var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }

        .mobile-menu .lang-toggle {
            display: flex;
            gap: 6px;
            margin-top: 8px;
            padding: 0 12px;
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: #fff;
            border-bottom: 1px solid rgba(45, 111, 163, 0.06);
            padding: 14px 0;
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .breadcrumb-bar a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb-bar a:hover {
            color: var(--primary);
        }

        .breadcrumb-bar .separator {
            color: var(--text-weak);
            font-size: 0.7rem;
        }

        .breadcrumb-bar .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* Category Hero */
        .category-hero {
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            position: relative;
            padding: 96px 0 80px;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 27, 41, 0.75);
            z-index: 1;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: #fff;
            margin: 0 0 18px;
            max-width: 720px;
            line-height: 1.2;
        }

        .category-hero .hero-sub {
            font-size: 1.12rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 620px;
            margin: 0 0 28px;
            line-height: 1.75;
        }

        .category-hero .hero-stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .category-hero .hero-stat {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: var(--radius-card);
            padding: 16px 22px;
            min-width: 120px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .category-hero .hero-stat .stat-num {
            font-size: 1.7rem;
            font-weight: 800;
            color: #fff;
            display: block;
            line-height: 1.2;
        }

        .category-hero .hero-stat .stat-label {
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.04em;
        }

        .category-hero .hero-actions {
            display: flex;
            gap: 14px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        .category-hero .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.5);
            border-radius: var(--radius-btn);
            padding: 11px 22px;
            font-weight: 600;
            font-size: 0.92rem;
            transition: all var(--transition);
        }

        .category-hero .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border-color: #fff;
        }

        /* Category Overview */
        .overview-section {
            background: #fff;
            border-bottom: 1px solid rgba(45, 111, 163, 0.06);
        }

        .overview-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--card-border);
            padding: 32px 36px;
            margin-top: -0px;
        }

        .overview-card p {
            font-size: 1.02rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin: 0 0 16px;
        }

        .overview-card p:last-child {
            margin-bottom: 0;
        }

        /* Main Layout with Sidebar */
        .data-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 32px;
            align-items: start;
        }

        /* Data List Cards */
        .data-card-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .data-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--card-border);
            padding: 24px 28px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: all var(--transition);
        }

        .data-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .data-card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 10px;
            background: var(--primary-pale);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .data-card .card-body {
            flex: 1;
            min-width: 0;
        }

        .data-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 6px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .data-card .card-tag {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-pale);
            border-radius: var(--radius-badge);
            padding: 3px 10px;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .data-card .card-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 10px;
        }

        .data-card .card-meta {
            display: flex;
            gap: 16px;
            font-size: 0.78rem;
            color: var(--text-weak);
            align-items: center;
        }

        .data-card .card-link {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }

        .data-card .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* Sidebar */
        .sidebar-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--card-border);
            padding: 24px;
            margin-bottom: 20px;
        }

        .sidebar-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--card-border);
            letter-spacing: -0.01em;
        }

        .sidebar-card .hot-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .sidebar-card .hot-list li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(45, 111, 163, 0.05);
            font-size: 0.88rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card .hot-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .sidebar-card .hot-list .rank-badge {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--primary-pale);
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .sidebar-card .hot-list .rank-badge.top {
            background: var(--accent);
            color: #fff;
        }

        .sidebar-card .quick-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .sidebar-card .quick-links a {
            font-size: 0.88rem;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 6px;
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card .quick-links a:hover {
            background: var(--primary-pale);
            color: var(--primary);
        }

        /* Deep Content */
        .deep-content {
            background: #fff;
        }

        .deep-content .content-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .deep-content .content-text h2 {
            font-size: 1.65rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
            margin: 0 0 18px;
            line-height: 1.35;
        }

        .deep-content .content-text p {
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin: 0 0 16px;
        }

        .deep-content .content-image {
            border-radius: var(--radius-img);
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }

        .deep-content .content-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        /* Metrics Strip */
        .metrics-section {
            background: var(--bg-alt);
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metric-item {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--card-border);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition);
        }

        .metric-item:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }

        .metric-item .metric-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .metric-item .metric-num.accent {
            color: var(--accent);
        }

        .metric-item .metric-num.green {
            color: var(--accent-green);
        }

        .metric-item .metric-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--card-border);
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-item summary {
            padding: 18px 24px;
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: all var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            color: var(--primary);
            font-size: 0.85rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item[open] summary {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 16px 24px 20px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.8;
            border-top: 1px solid var(--card-border);
        }

        /* CTA */
        .cta-section {
            background: var(--primary);
            color: #fff;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #fff;
            margin: 0 0 12px;
        }

        .cta-section p {
            font-size: 1.02rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.75;
        }

        .cta-section .btn-white {
            background: #fff;
            color: var(--primary);
            border: none;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-weight: 700;
            font-size: 0.95rem;
            transition: all var(--transition);
        }

        .cta-section .btn-white:hover {
            background: rgba(255, 255, 255, 0.88);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        /* Footer */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 0;
            font-size: 0.9rem;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 36px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .site-footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            display: block;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .site-footer p {
            line-height: 1.7;
            margin: 0 0 12px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
        }

        .site-footer h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-footer ul li {
            margin-bottom: 8px;
        }

        .site-footer ul a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.88rem;
            transition: color var(--transition);
        }

        .site-footer ul a:hover {
            color: #fff;
        }

        .site-footer .footer-bottom {
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
            transition: color var(--transition);
        }

        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav-desktop {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-menu.active {
                display: flex;
            }

            .data-layout {
                grid-template-columns: 1fr;
            }

            .deep-content .content-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .category-hero h1 {
                font-size: 2.2rem;
            }

            :root {
                --section-pad: 64px;
            }
        }

        @media (max-width: 640px) {
            .container,
            .container-wide {
                padding: 0 16px;
            }

            :root {
                --section-pad: 52px;
                --section-pad-mobile: 40px;
            }

            .section {
                padding: var(--section-pad-mobile) 0;
            }

            .category-hero {
                padding: 60px 0 48px;
            }

            .category-hero h1 {
                font-size: 1.8rem;
            }

            .category-hero .hero-sub {
                font-size: 1rem;
            }

            .category-hero .hero-stats {
                gap: 12px;
            }

            .category-hero .hero-stat {
                padding: 12px 16px;
                min-width: 90px;
            }

            .category-hero .hero-stat .stat-num {
                font-size: 1.3rem;
            }

            .category-hero .hero-actions {
                flex-direction: column;
                gap: 10px;
            }

            .category-hero .btn,
            .category-hero .btn-outline-light {
                width: 100%;
                justify-content: center;
            }

            .data-card {
                padding: 18px 16px;
                flex-direction: column;
                gap: 12px;
            }

            .data-card .card-icon {
                width: 44px;
                height: 44px;
                font-size: 1.1rem;
            }

            .overview-card {
                padding: 24px 18px;
            }

            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .metric-item {
                padding: 18px 16px;
            }

            .metric-item .metric-num {
                font-size: 1.6rem;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .site-footer {
                padding: 48px 0 0;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .breadcrumb-bar {
                font-size: 0.78rem;
                padding: 10px 0;
            }

            .section-heading h2 {
                font-size: 1.5rem;
            }

            .deep-content .content-text h2 {
                font-size: 1.35rem;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }

            .lang-toggle button {
                padding: 4px 8px;
                font-size: 0.7rem;
            }
        }

        @media (max-width: 520px) {
            .site-header .container-wide {
                gap: 10px;
            }

            .brand-logo {
                font-size: 1.2rem;
            }

            .brand-badge {
                font-size: 0.58rem;
                padding: 2px 6px;
            }

            .header-actions .btn {
                display: none;
            }

            .header-actions {
                gap: 8px;
            }

            .category-hero h1 {
                font-size: 1.55rem;
            }

            .data-card .card-title {
                font-size: 0.95rem;
            }

            .data-card .card-desc {
                font-size: 0.85rem;
            }

            .sidebar-card {
                padding: 18px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2D6FA3;
            --primary-dark: #255D8A;
            --primary-light: #3F83C4;
            --primary-pale: #EBF3FA;
            --bg: #F5F8FB;
            --bg-alt: #EDF2F7;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-weak: #94A3B8;
            --accent: #E6A23C;
            --accent-green: #26A69A;
            --card-border: rgba(45, 111, 163, 0.08);
            --card-shadow: 0 8px 22px rgba(30, 41, 59, 0.06);
            --card-shadow-hover: 0 14px 34px rgba(30, 41, 59, 0.1);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 20px;
            --radius-img: 10px;
            --section-pad: 88px;
            --section-pad-mobile: 52px;
            --footer-bg: #0F1B29;
            --font-stack: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: 0.22s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.72;
            margin: 0;
            padding: 0;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover,
        a:focus {
            color: var(--primary-dark);
            text-decoration: none;
            outline: none;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-pad) 0;
        }

        .section--alt {
            background: #ffffff;
        }

        .section--pale {
            background: var(--bg-alt);
        }

        .section-heading {
            margin-bottom: 44px;
        }

        .section-heading h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin: 0 0 12px;
        }

        .section-heading p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0;
            line-height: 1.75;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-pale);
            border-radius: var(--radius-badge);
            padding: 5px 14px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        /* Header & Nav */
        .site-header {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(45, 111, 163, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 8px rgba(30, 41, 59, 0.04);
        }

        .site-header .container-wide {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            flex-wrap: nowrap;
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            transition: color var(--transition);
        }

        .brand-logo:hover {
            color: var(--primary-dark);
        }

        .brand-badge {
            font-size: 0.65rem;
            font-weight: 700;
            color: var(--accent);
            background: rgba(230, 162, 60, 0.12);
            padding: 3px 8px;
            border-radius: 4px;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .main-nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }

        .main-nav-desktop a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .main-nav-desktop a:hover,
        .main-nav-desktop a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .lang-toggle {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            border-radius: 18px;
            padding: 3px;
            border: 1px solid rgba(45, 111, 163, 0.12);
        }

        .lang-toggle button {
            background: transparent;
            border: none;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 5px 13px;
            border-radius: 16px;
            cursor: pointer;
            transition: all var(--transition);
            letter-spacing: 0.03em;
            line-height: 1.4;
        }

        .lang-toggle button.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 6px rgba(45, 111, 163, 0.25);
        }

        .lang-toggle button:hover:not(.active) {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .lang-toggle button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.92rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            white-space: nowrap;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        .btn:active {
            transform: translateY(1px);
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 4px 12px rgba(45, 111, 163, 0.25);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-pale);
            color: var(--primary-dark);
            border-color: var(--primary);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        .btn-accent:hover {
            background: #d18f28;
            border-color: #d18f28;
            color: #fff;
            box-shadow: 0 4px 12px rgba(230, 162, 60, 0.3);
        }

        .btn-sm {
            font-size: 0.82rem;
            padding: 8px 16px;
        }

        .btn-lg {
            font-size: 1rem;
            padding: 14px 28px;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(45, 111, 163, 0.2);
            border-radius: 6px;
            color: var(--primary);
            font-size: 1.2rem;
            padding: 8px 12px;
            cursor: pointer;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-pale);
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid rgba(45, 111, 163, 0.08);
            padding: 16px 24px;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu a {
            font-size: 0.95rem;
            color: var(--text-secondary);
            padding: 10px 8px;
            border-radius: 6px;
            transition: all var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }

        .mobile-menu .lang-toggle {
            margin-top: 10px;
            display: inline-flex;
            align-self: flex-start;
        }

        /* Hero */
        .page-hero {
            position: relative;
            padding: 56px 0 48px;
            background: linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
            border-bottom: 1px solid rgba(45, 111, 163, 0.06);
            overflow: hidden;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            top: -120px;
            right: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(45, 111, 163, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-weak);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb-nav a:hover {
            color: var(--primary);
        }

        .breadcrumb-nav .separator {
            color: var(--text-weak);
            font-size: 0.7rem;
        }

        .breadcrumb-nav .current {
            color: var(--primary);
            font-weight: 600;
        }

        .hero-layout {
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 48px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: var(--text);
            margin: 0 0 16px;
            line-height: 1.25;
        }

        .hero-content h1 .highlight {
            color: var(--primary);
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0 0 24px;
            max-width: 580px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .hero-stats {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
        }

        .hero-stat .stat-num {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
        }

        .hero-stat .stat-label {
            font-size: 0.78rem;
            color: var(--text-weak);
            letter-spacing: 0.04em;
        }

        .hero-image-wrap {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            aspect-ratio: 4 / 3;
            background: #fff;
            border: 1px solid var(--card-border);
        }

        .hero-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-card);
        }

        .hero-image-wrap .image-badge {
            position: absolute;
            bottom: 14px;
            left: 14px;
            background: rgba(15, 27, 41, 0.78);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            letter-spacing: 0.03em;
            backdrop-filter: blur(6px);
        }

        /* Cards */
        .card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 28px;
            transition: all var(--transition);
        }

        .card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
            letter-spacing: -0.01em;
        }

        .card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--primary-pale);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 16px;
        }

        /* Stats cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 28px;
            text-align: left;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
        }

        .stat-card:nth-child(1)::before {
            background: var(--primary-light);
        }
        .stat-card:nth-child(2)::before {
            background: var(--accent);
        }
        .stat-card:nth-child(3)::before {
            background: var(--accent-green);
        }

        .stat-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }

        .stat-card .stat-icon {
            font-size: 1.6rem;
            margin-bottom: 14px;
            display: inline-block;
        }

        .stat-card .stat-card-value {
            font-size: 2.1rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.03em;
            margin-bottom: 4px;
            line-height: 1.2;
        }

        .stat-card .stat-card-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        .stat-card .stat-card-desc {
            font-size: 0.86rem;
            color: var(--text-weak);
            line-height: 1.65;
            margin: 0;
        }

        /* Deep content */
        .deep-content {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 40px 44px;
        }

        .deep-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
            margin: 0 0 20px;
            line-height: 1.35;
        }

        .deep-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin: 28px 0 12px;
        }

        .deep-content p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin: 0 0 18px;
        }

        .deep-content ul {
            margin: 0 0 18px;
            padding-left: 22px;
        }

        .deep-content li {
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 8px;
        }

        .deep-content li strong {
            color: var(--text);
        }

        .deep-content blockquote {
            margin: 24px 0;
            padding: 18px 24px;
            background: var(--primary-pale);
            border-left: 4px solid var(--primary);
            border-radius: 0 8px 8px 0;
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* Ranking table cards */
        .ranking-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: all var(--transition);
        }

        .ranking-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .ranking-card .rank-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 24px;
            background: var(--bg-alt);
            border-bottom: 1px solid var(--card-border);
            flex-wrap: wrap;
            gap: 8px;
        }

        .ranking-card .rank-position {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.03em;
        }

        .ranking-card .rank-team {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
        }

        .ranking-card .rank-badge {
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.04em;
        }

        .rank-badge.rising {
            background: rgba(38, 166, 154, 0.12);
            color: var(--accent-green);
        }

        .rank-badge.falling {
            background: rgba(230, 162, 60, 0.14);
            color: var(--accent);
        }

        .rank-badge.stable {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .ranking-card .rank-body {
            padding: 16px 24px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            align-items: center;
        }

        .rank-metric {
            display: flex;
            flex-direction: column;
        }

        .rank-metric .metric-num {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
        }

        .rank-metric .metric-label {
            font-size: 0.72rem;
            color: var(--text-weak);
            letter-spacing: 0.04em;
        }

        /* Overview section */
        .overview-section {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            box-shadow: var(--card-shadow);
            padding: 36px 40px;
        }

        .overview-section p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 16px;
        }

        .overview-section p:last-child {
            margin-bottom: 0;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border-radius: 10px;
            border: 1px solid var(--card-border);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(45, 111, 163, 0.2);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            background: #fff;
            border: none;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: background var(--transition);
            line-height: 1.5;
        }

        .faq-question:hover {
            background: #f9fbfe;
        }

        .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            color: var(--primary);
            font-size: 0.85rem;
            transition: transform var(--transition);
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            background: #fff;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
            background: var(--primary-pale);
        }

        .faq-answer p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* CTA section */
        .cta-section {
            background: var(--footer-bg);
            border-radius: 16px;
            padding: 52px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -60px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(45, 111, 163, 0.3) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(230, 162, 60, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin: 0 0 12px;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.7);
            margin: 0 auto 24px;
            max-width: 560px;
            line-height: 1.7;
        }

        .cta-section .btn {
            font-size: 0.95rem;
            padding: 13px 30px;
        }

        /* Footer */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 28px;
            font-size: 0.88rem;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 40px;
        }

        .site-footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
            letter-spacing: 0.03em;
        }

        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-footer ul li {
            margin-bottom: 10px;
        }

        .site-footer ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            transition: color var(--transition);
        }

        .site-footer ul a:hover {
            color: #fff;
        }

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            display: block;
            margin-bottom: 12px;
        }

        .site-footer p {
            font-size: 0.84rem;
            line-height: 1.7;
            margin: 0 0 10px;
            color: rgba(255, 255, 255, 0.55);
        }

        .site-footer a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.84rem;
            transition: color var(--transition);
        }

        .site-footer a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 0.76rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            font-size: 0.76rem;
            color: rgba(255, 255, 255, 0.5);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        .footer-bottom span {
            white-space: nowrap;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav-desktop {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .mobile-menu.open {
                display: flex;
            }
            .hero-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-image-wrap {
                max-width: 480px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .deep-content {
                padding: 32px 28px;
            }
            .overview-section {
                padding: 28px 24px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .ranking-card .rank-body {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 56px;
            }
            .section {
                padding: var(--section-pad) 0;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .deep-content {
                padding: 24px 20px;
            }
            .deep-content h2 {
                font-size: 1.35rem;
            }
            .overview-section {
                padding: 20px 18px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .cta-section {
                padding: 36px 22px;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .hero-stats {
                gap: 16px;
            }
            .ranking-card .rank-body {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .container,
            .container-narrow,
            .container-wide {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .section-heading h2 {
                font-size: 1.5rem;
            }
            .btn-lg {
                font-size: 0.9rem;
                padding: 12px 20px;
            }
            .hero-stats {
                flex-direction: column;
                gap: 8px;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2D6FA3;
            --primary-dark: #255D8A;
            --primary-light: #3F83C4;
            --primary-pale: #EBF3FA;
            --bg: #F5F8FB;
            --bg-alt: #EDF2F7;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-weak: #94A3B8;
            --accent: #E6A23C;
            --accent-green: #26A69A;
            --card-border: rgba(45, 111, 163, 0.08);
            --card-shadow: 0 8px 22px rgba(30, 41, 59, 0.06);
            --card-shadow-hover: 0 14px 34px rgba(30, 41, 59, 0.1);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 20px;
            --radius-img: 10px;
            --section-pad: 88px;
            --section-pad-mobile: 52px;
            --footer-bg: #0F1B29;
            --font-stack: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: 0.22s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.72;
            margin: 0;
            padding: 0;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-pad) 0;
        }

        .section--alt {
            background: #fff;
        }

        .section--pale {
            background: var(--primary-pale);
        }

        .section-heading {
            margin-bottom: 44px;
        }

        .section-heading h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin: 0 0 12px;
            line-height: 1.3;
        }

        .section-heading p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0;
            line-height: 1.75;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-pale);
            border-radius: var(--radius-badge);
            padding: 5px 14px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .section-tag--accent {
            color: #B06E0B;
            background: rgba(230, 162, 60, 0.14);
        }

        .section-tag--green {
            color: #1A7A70;
            background: rgba(38, 166, 154, 0.12);
        }

        /* Header & Nav */
        .site-header {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(45, 111, 163, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 8px rgba(30, 41, 59, 0.04);
        }

        .site-header .container-wide {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            flex-wrap: nowrap;
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--primary-dark);
        }

        .brand-badge {
            font-size: 0.65rem;
            font-weight: 700;
            color: var(--accent);
            background: rgba(230, 162, 60, 0.12);
            padding: 3px 8px;
            border-radius: 4px;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .main-nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .main-nav-desktop::-webkit-scrollbar {
            display: none;
        }

        .main-nav-desktop a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .main-nav-desktop a:hover,
        .main-nav-desktop a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .lang-toggle {
            display: flex;
            align-items: center;
            gap: 2px;
            background: var(--bg-alt);
            border-radius: 18px;
            padding: 2px;
            border: 1px solid rgba(45, 111, 163, 0.12);
        }

        .lang-toggle button {
            background: transparent;
            border: none;
            font-size: 0.76rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 5px 12px;
            border-radius: 16px;
            cursor: pointer;
            transition: all var(--transition);
            letter-spacing: 0.03em;
            line-height: 1.4;
        }

        .lang-toggle button.active {
            background: var(--primary);
            color: #fff;
        }

        .lang-toggle button:hover:not(.active) {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.92rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
            line-height: 1.4;
        }

        .btn:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 18px rgba(45, 111, 163, 0.25);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            background: #1F4E73;
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-pale);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
        }

        .btn-outline:active {
            background: rgba(45, 111, 163, 0.15);
        }

        .btn-sm {
            padding: 7px 16px;
            font-size: 0.82rem;
        }

        .btn-lg {
            padding: 14px 30px;
            font-size: 1rem;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            font-size: 1.3rem;
            color: var(--text-secondary);
            cursor: pointer;
            padding: 8px;
            border-radius: 6px;
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            color: var(--primary);
            background: var(--primary-pale);
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid rgba(45, 111, 163, 0.08);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 10px 12px;
            border-radius: 6px;
            transition: all var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }

        .mobile-menu .lang-toggle {
            align-self: flex-start;
            margin-top: 12px;
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: #fff;
            border-bottom: 1px solid rgba(45, 111, 163, 0.06);
            padding: 14px 0;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--text-weak);
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb-nav a:hover {
            color: var(--primary);
        }

        .breadcrumb-nav .separator {
            color: var(--text-weak);
            font-size: 0.7rem;
        }

        .breadcrumb-nav .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* Category Hero */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, #1E293B 0%, #1E3A5A 45%, #2D6FA3 100%);
            padding: 76px 0 84px;
            overflow: hidden;
            color: #fff;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 520px;
            height: 520px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(63, 131, 196, 0.25) 0%, rgba(63, 131, 196, 0) 70%);
            pointer-events: none;
        }

        .category-hero-pattern {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center center;
            opacity: 0.15;
            pointer-events: none;
            z-index: 0;
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
        }

        .category-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.025em;
            margin: 0 0 16px;
            line-height: 1.25;
            color: #fff;
            max-width: 720px;
        }

        .category-hero .hero-subtitle {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.82);
            max-width: 620px;
            margin: 0 0 28px;
            line-height: 1.75;
        }

        .hero-meta-row {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 8px;
        }

        .hero-stat-tag {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 7px 14px;
            border-radius: var(--radius-badge);
        }

        .hero-stat-tag i {
            color: var(--accent);
            font-size: 0.8rem;
        }

        /* Category Overview */
        .category-overview {
            padding: 56px 0 28px;
        }

        .overview-card {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 40px 44px;
        }

        .overview-card h2 {
            font-size: 1.6rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin: 0 0 16px;
            line-height: 1.35;
        }

        .overview-card p {
            font-size: 1.02rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 14px;
        }

        .overview-card p:last-child {
            margin-bottom: 0;
        }

        /* Steps / Process */
        .steps-section {
            background: #fff;
            border-top: 1px solid rgba(45, 111, 163, 0.05);
            border-bottom: 1px solid rgba(45, 111, 163, 0.05);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-card {
            position: relative;
            background: var(--bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 32px 24px 28px;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(30, 41, 59, 0.03);
        }

        .step-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(45, 111, 163, 0.18);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 18px;
            box-shadow: 0 4px 12px rgba(45, 111, 163, 0.3);
        }

        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 10px;
            letter-spacing: -0.01em;
        }

        .step-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* Thumbnail Cards */
        .report-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .report-card {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .report-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(45, 111, 163, 0.18);
        }

        .report-card .card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-alt);
        }

        .report-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .report-card:hover .card-image img {
            transform: scale(1.04);
        }

        .report-card .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            padding: 5px 12px;
            border-radius: var(--radius-badge);
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(30, 41, 59, 0.12);
        }

        .report-card .card-body {
            padding: 22px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .report-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
            letter-spacing: -0.01em;
            line-height: 1.4;
        }

        .report-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            color: var(--text-weak);
            margin-bottom: 12px;
            flex-wrap: wrap;
        }

        .report-card .card-body .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .report-card .card-body .card-meta i {
            font-size: 0.68rem;
        }

        .report-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0 0 16px;
            flex: 1;
        }

        .report-card .card-body .card-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
            padding: 6px 0;
        }

        .report-card .card-body .card-link:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        /* Data Metrics */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .metric-card {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition);
        }

        .metric-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }

        .metric-card .metric-icon {
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 12px;
            display: inline-block;
        }

        .metric-card .metric-number {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .metric-card .metric-number .unit {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-weak);
        }

        .metric-card .metric-label {
            font-size: 0.88rem;
            color: var(--text-secondary);
        }

        /* Deep Content */
        .deep-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .deep-content .deep-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            position: relative;
        }

        .deep-content .deep-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            border-radius: var(--radius-card);
        }

        .deep-content .deep-image::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-card);
            background: linear-gradient(180deg, rgba(30, 41, 59, 0) 55%, rgba(30, 41, 59, 0.2) 100%);
            pointer-events: none;
        }

        .deep-content .deep-text h2 {
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin: 0 0 16px;
            line-height: 1.3;
        }

        .deep-content .deep-text p {
            font-size: 1.02rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 14px;
        }

        /* FAQ */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(30, 41, 59, 0.03);
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(45, 111, 163, 0.18);
        }

        .faq-item.active {
            background: #EBF3FA;
            border-color: rgba(45, 111, 163, 0.2);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            width: 100%;
            background: transparent;
            border: none;
            text-align: left;
            transition: color var(--transition);
            line-height: 1.5;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question i {
            font-size: 0.85rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.25s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 24px 22px;
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #255D8A 0%, #2D6FA3 50%, #3F83C4 100%);
            color: #fff;
            text-align: center;
            padding: 72px 0;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #fff;
            margin: 0 0 14px;
        }

        .cta-section p {
            font-size: 1.08rem;
            color: rgba(255, 255, 255, 0.82);
            max-width: 560px;
            margin: 0 auto 30px;
            line-height: 1.75;
        }

        .cta-section .btn {
            margin: 0 8px;
        }

        .cta-section .btn-outline {
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
            background: transparent;
        }

        .cta-section .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        /* Footer */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 24px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .site-footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            display: block;
            margin-bottom: 12px;
        }

        .site-footer p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0 0 8px;
            color: rgba(255, 255, 255, 0.6);
        }

        .site-footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
            letter-spacing: 0.02em;
        }

        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-footer ul li {
            margin-bottom: 8px;
        }

        .site-footer ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }

        .site-footer ul li a:hover {
            color: #fff;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
            transition: color var(--transition);
        }

        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav-desktop {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .mobile-menu.open {
                display: flex;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .report-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .deep-content {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 56px;
                --section-pad-mobile: 40px;
            }

            .category-hero {
                padding: 48px 0 56px;
            }

            .category-hero h1 {
                font-size: 1.8rem;
            }

            .category-hero .hero-subtitle {
                font-size: 1rem;
            }

            .overview-card {
                padding: 28px 22px;
            }

            .overview-card h2 {
                font-size: 1.3rem;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .report-card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .section-heading h2 {
                font-size: 1.5rem;
            }

            .deep-content .deep-text h2 {
                font-size: 1.35rem;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .site-header .container-wide {
                min-height: 58px;
                gap: 10px;
            }

            .brand-badge {
                display: none;
            }

            .header-actions .btn {
                display: none;
            }

            .lang-toggle button {
                padding: 4px 10px;
                font-size: 0.72rem;
            }
        }

        @media (max-width: 520px) {
            .container,
            .container-wide,
            .container-narrow {
                padding: 0 16px;
            }

            .category-hero h1 {
                font-size: 1.55rem;
            }

            .hero-meta-row {
                gap: 10px;
            }

            .hero-stat-tag {
                font-size: 0.75rem;
                padding: 5px 10px;
            }

            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .metric-card {
                padding: 20px 16px;
            }

            .metric-card .metric-number {
                font-size: 1.7rem;
            }

            .faq-question {
                font-size: 0.92rem;
                padding: 16px 18px;
            }

            .faq-answer {
                padding: 0 18px;
            }

            .faq-item.active .faq-answer {
                padding: 0 18px 18px;
            }

            .btn-lg {
                padding: 12px 20px;
                font-size: 0.9rem;
            }
        }

        /* Utility */
        .text-center {
            text-align: center;
        }

        .mt-0 {
            margin-top: 0;
        }

        .mb-0 {
            margin-bottom: 0;
        }

        .gap-sm {
            gap: 8px;
        }

/* roulang page: category6 */
:root {
            --primary: #2D6FA3;
            --primary-dark: #255D8A;
            --primary-light: #3F83C4;
            --primary-pale: #EBF3FA;
            --bg: #F5F8FB;
            --bg-alt: #EDF2F7;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-weak: #94A3B8;
            --accent: #E6A23C;
            --accent-green: #26A69A;
            --card-border: rgba(45, 111, 163, 0.08);
            --card-shadow: 0 8px 22px rgba(30, 41, 59, 0.06);
            --card-shadow-hover: 0 14px 34px rgba(30, 41, 59, 0.1);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 20px;
            --radius-img: 10px;
            --section-pad: 88px;
            --section-pad-mobile: 52px;
            --footer-bg: #0F1B29;
            --font-stack: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: 0.22s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.72;
            margin: 0;
            padding: 0;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-pad) 0;
        }

        .section--alt {
            background: #fff;
        }

        .section--pale {
            background: var(--primary-pale);
        }

        .section--dark {
            background: var(--footer-bg);
            color: #fff;
        }

        .section-heading {
            margin-bottom: 44px;
        }

        .section-heading h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin: 0 0 12px;
        }

        .section-heading p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0;
            line-height: 1.75;
        }

        .section-heading--light h2 {
            color: #fff;
        }

        .section-heading--light p {
            color: rgba(255, 255, 255, 0.75);
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-pale);
            border-radius: var(--radius-badge);
            padding: 5px 14px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .section-tag--accent {
            color: #8a5a0e;
            background: rgba(230, 162, 60, 0.14);
        }

        .section-tag--light {
            color: #fff;
            background: rgba(255, 255, 255, 0.16);
        }

        /* Header & Nav */
        .site-header {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(45, 111, 163, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 8px rgba(30, 41, 59, 0.04);
        }

        .site-header .container-wide {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            flex-wrap: nowrap;
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--primary-dark);
        }

        .brand-badge {
            font-size: 0.65rem;
            font-weight: 700;
            color: var(--accent);
            background: rgba(230, 162, 60, 0.12);
            padding: 3px 8px;
            border-radius: 4px;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .main-nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }

        .main-nav-desktop a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .main-nav-desktop a:hover,
        .main-nav-desktop a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .lang-toggle button {
            background: transparent;
            border: none;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 6px 12px;
            border-radius: 18px;
            cursor: pointer;
            transition: all var(--transition);
            letter-spacing: 0.03em;
        }

        .lang-toggle button.active {
            background: var(--primary);
            color: #fff;
        }

        .lang-toggle button:hover:not(.active) {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.92rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 10px rgba(45, 111, 163, 0.2);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(45, 111, 163, 0.28);
        }

        .btn-primary:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 6px rgba(45, 111, 163, 0.18);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-pale);
            color: var(--primary-dark);
            border-color: var(--primary);
            transform: translateY(-1px);
        }

        .btn-outline:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            box-shadow: 0 4px 10px rgba(230, 162, 60, 0.22);
        }

        .btn-accent:hover {
            background: #d49530;
            border-color: #d49530;
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-accent:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 0.82rem;
        }

        .btn-lg {
            padding: 14px 30px;
            font-size: 1rem;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--card-border);
            border-radius: 6px;
            font-size: 1.2rem;
            color: var(--text-secondary);
            padding: 8px 12px;
            cursor: pointer;
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--card-border);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu a {
            padding: 10px 12px;
            border-radius: 6px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .mobile-menu .lang-toggle {
            margin-top: 12px;
            display: flex;
            gap: 8px;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--text-weak);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb i {
            font-size: 0.6rem;
            opacity: 0.6;
        }

        .breadcrumb span {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Hero */
        .hero-category {
            padding: 56px 0 48px;
            background: linear-gradient(135deg, #fff 0%, var(--primary-pale) 100%);
            border-bottom: 1px solid var(--card-border);
        }

        .hero-category h1 {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.025em;
            color: var(--text);
            margin: 0 0 14px;
            line-height: 1.25;
        }

        .hero-category .hero-sub {
            font-size: 1.08rem;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin: 0 0 24px;
        }

        .hero-category .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .hero-category .hero-meta {
            display: flex;
            gap: 24px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

        .hero-category .hero-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        .hero-category .hero-meta-item i {
            color: var(--primary);
            font-size: 0.95rem;
        }

        /* Filter tags */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 36px;
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-badge);
            padding: 7px 16px;
            cursor: pointer;
            transition: all var(--transition);
            user-select: none;
            white-space: nowrap;
        }

        .filter-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-pale);
        }

        .filter-tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 10px rgba(45, 111, 163, 0.18);
        }

        .filter-tag:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* List cards */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-list-item {
            display: flex;
            gap: 20px;
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 20px 24px;
            transition: all var(--transition);
        }

        .news-list-item:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(45, 111, 163, 0.18);
        }

        .news-list-item .news-thumb {
            width: 120px;
            min-width: 120px;
            height: 84px;
            border-radius: var(--radius-img);
            overflow: hidden;
            flex-shrink: 0;
        }

        .news-list-item .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-list-item .news-body {
            flex: 1;
            min-width: 0;
        }

        .news-list-item .news-top {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
            flex-wrap: wrap;
        }

        .news-list-item .news-date {
            font-size: 0.75rem;
            color: var(--text-weak);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .news-list-item .news-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-pale);
            border-radius: 4px;
            padding: 3px 8px;
            white-space: nowrap;
            letter-spacing: 0.03em;
        }

        .news-list-item .news-tag--accent {
            color: #8a5a0e;
            background: rgba(230, 162, 60, 0.14);
        }

        .news-list-item .news-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 6px;
            line-height: 1.45;
        }

        .news-list-item .news-title a {
            color: var(--text);
            transition: color var(--transition);
        }

        .news-list-item .news-title a:hover {
            color: var(--primary);
        }

        .news-list-item .news-excerpt {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin: 0 0 10px;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-list-item .news-link {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: all var(--transition);
        }

        .news-list-item .news-link i {
            font-size: 0.65rem;
            transition: transform var(--transition);
        }

        .news-list-item .news-link:hover {
            color: var(--primary-dark);
        }

        .news-list-item .news-link:hover i {
            transform: translateX(3px);
        }

        /* Stats strip */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .stat-card {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition);
        }

        .stat-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .stat-card .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .stat-card .stat-num--accent {
            color: var(--accent);
        }

        .stat-card .stat-num--green {
            color: var(--accent-green);
        }

        .stat-card .stat-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-top: 6px;
            line-height: 1.5;
        }

        /* Deep content */
        .deep-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .deep-content .deep-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: -0.015em;
            color: var(--text);
            margin: 0 0 16px;
            line-height: 1.35;
        }

        .deep-content .deep-text p {
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin: 0 0 14px;
        }

        .deep-content .deep-text p:last-child {
            margin-bottom: 0;
        }

        .deep-content .deep-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--card-border);
        }

        .deep-content .deep-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        /* FAQ */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(45, 111, 163, 0.2);
        }

        .faq-item.active {
            background: var(--primary-pale);
            border-color: rgba(45, 111, 163, 0.25);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 18px 24px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text);
            text-align: left;
            transition: all var(--transition);
            line-height: 1.5;
        }

        .faq-question:focus {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }

        .faq-question i {
            font-size: 0.8rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.25s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
        }

        /* CTA panel */
        .cta-panel {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: 0 16px 40px rgba(45, 111, 163, 0.25);
        }

        .cta-panel .cta-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 8px;
            letter-spacing: -0.015em;
            line-height: 1.3;
        }

        .cta-panel .cta-text p {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.78);
            margin: 0;
            line-height: 1.7;
            max-width: 520px;
        }

        .cta-panel .cta-actions {
            display: flex;
            gap: 12px;
            flex-shrink: 0;
            flex-wrap: wrap;
        }

        .cta-panel .btn-white {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        .cta-panel .btn-white:hover {
            background: var(--primary-pale);
            border-color: var(--primary-pale);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        .cta-panel .btn-white:focus {
            outline: 2px solid #fff;
            outline-offset: 2px;
        }

        /* Footer */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.75);
            padding: 52px 0 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            display: block;
            margin-bottom: 12px;
        }

        .site-footer p {
            font-size: 0.88rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.65);
            margin: 0 0 8px;
        }

        .site-footer h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.04em;
            margin: 0 0 14px;
            text-transform: uppercase;
        }

        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer ul li {
            margin-bottom: 8px;
        }

        .site-footer ul a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }

        .site-footer ul a:hover {
            color: #fff;
        }

        .site-footer .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition);
        }

        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav-desktop {
                gap: 0;
            }
            .main-nav-desktop a {
                padding: 8px 8px;
                font-size: 0.8rem;
            }
            .deep-content {
                gap: 28px;
            }
            .deep-content .deep-image img {
                height: 260px;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .cta-panel {
                padding: 36px 28px;
            }
        }

        @media (max-width: 768px) {
            .main-nav-desktop {
                display: none;
            }
            .header-actions .lang-toggle {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .mobile-menu {
                display: none;
            }
            .mobile-menu.open {
                display: flex;
            }
            .section {
                padding: var(--section-pad-mobile) 0;
            }
            .hero-category {
                padding: 36px 0 32px;
            }
            .hero-category h1 {
                font-size: 1.7rem;
            }
            .hero-category .hero-sub {
                font-size: 0.95rem;
            }
            .deep-content {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .deep-content .deep-image img {
                height: 220px;
            }
            .news-list-item {
                flex-direction: column;
                gap: 14px;
                padding: 16px;
            }
            .news-list-item .news-thumb {
                width: 100%;
                min-width: 100%;
                height: 160px;
            }
            .filter-bar {
                gap: 8px;
                margin-bottom: 24px;
            }
            .filter-tag {
                font-size: 0.75rem;
                padding: 6px 12px;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card {
                padding: 16px 12px;
            }
            .stat-card .stat-num {
                font-size: 1.5rem;
            }
            .cta-panel {
                flex-direction: column;
                text-align: center;
                padding: 28px 20px;
            }
            .cta-panel .cta-actions {
                justify-content: center;
                width: 100%;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
        }

        @media (max-width: 520px) {
            .container,
            .container-wide,
            .container-narrow {
                padding: 0 16px;
            }
            .hero-category h1 {
                font-size: 1.45rem;
            }
            .section-heading h2 {
                font-size: 1.5rem;
            }
            .stats-strip {
                grid-template-columns: 1fr;
            }
            .news-list-item .news-thumb {
                height: 140px;
            }
            .news-list-item .news-title {
                font-size: 0.95rem;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #2D6FA3;
            --primary-dark: #255D8A;
            --primary-light: #3F83C4;
            --primary-pale: #EBF3FA;
            --bg: #F5F8FB;
            --bg-alt: #EDF2F7;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-weak: #94A3B8;
            --accent: #E6A23C;
            --accent-green: #26A69A;
            --card-border: rgba(45, 111, 163, 0.08);
            --card-shadow: 0 8px 22px rgba(30, 41, 59, 0.06);
            --card-shadow-hover: 0 14px 34px rgba(30, 41, 59, 0.1);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 20px;
            --radius-img: 10px;
            --section-pad: 88px;
            --section-pad-mobile: 52px;
            --footer-bg: #0F1B29;
            --font-stack: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: 0.22s ease;
        }
        :root {
            --primary: #2D6FA3;
            --primary-dark: #255D8A;
            --primary-light: #3F83C4;
            --primary-pale: #EBF3FA;
            --bg: #F5F8FB;
            --bg-alt: #EDF2F7;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-weak: #94A3B8;
            --accent: #E6A23C;
            --accent-green: #26A69A;
            --card-border: rgba(45, 111, 163, 0.08);
            --card-shadow: 0 8px 22px rgba(30, 41, 59, 0.06);
            --card-shadow-hover: 0 14px 34px rgba(30, 41, 59, 0.1);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 20px;
            --radius-img: 10px;
            --section-pad: 88px;
            --section-pad-mobile: 52px;
            --footer-bg: #0F1B29;
            --font-stack: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: 0.22s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.72;
            margin: 0;
            padding: 0;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }
        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-stack);
            line-height: 1.3;
            margin: 0 0 16px;
            color: var(--text);
            font-weight: 700;
            letter-spacing: -0.02em;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.03em;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 700;
        }
        p {
            margin: 0 0 18px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--section-pad) 0;
        }
        .section--alt {
            background: #fff;
        }
        .section--pale {
            background: var(--bg-alt);
        }
        .section-heading {
            margin-bottom: 44px;
        }
        .section-heading h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin: 0 0 12px;
        }
        .section-heading p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0;
            line-height: 1.75;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-pale);
            border-radius: var(--radius-badge);
            padding: 5px 14px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .section-tag--accent {
            color: var(--accent);
            background: rgba(230, 162, 60, 0.12);
        }
        /* Header & Nav */
        .site-header {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(45, 111, 163, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 8px rgba(30, 41, 59, 0.04);
        }
        .site-header .container-wide {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            flex-wrap: nowrap;
            gap: 20px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            transition: color var(--transition);
        }
        .brand-logo:hover {
            color: var(--primary-dark);
        }
        .brand-badge {
            font-size: 0.65rem;
            font-weight: 700;
            color: var(--accent);
            background: rgba(230, 162, 60, 0.12);
            padding: 3px 8px;
            border-radius: 4px;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .main-nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }
        .main-nav-desktop a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition);
        }
        .main-nav-desktop a:hover,
        .main-nav-desktop a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .lang-toggle {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--bg-alt);
            border-radius: 20px;
            padding: 3px;
        }
        .lang-toggle button {
            background: transparent;
            border: none;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 6px 12px;
            border-radius: 18px;
            cursor: pointer;
            transition: all var(--transition);
            letter-spacing: 0.03em;
            line-height: 1.4;
        }
        .lang-toggle button.active {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(30, 41, 59, 0.08);
        }
        .lang-toggle button:hover:not(.active) {
            color: var(--primary);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.92rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            line-height: 1.5;
            white-space: nowrap;
        }
        .btn:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn:active {
            transform: translateY(1px);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(45, 111, 163, 0.22);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 8px 20px rgba(45, 111, 163, 0.3);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: 0 2px 8px rgba(45, 111, 163, 0.18);
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-pale);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .btn-outline:active {
            background: var(--primary-pale);
            border-color: var(--primary-dark);
            color: var(--primary-dark);
            transform: translateY(0);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.82rem;
            border-radius: 6px;
        }
        .btn-lg {
            padding: 14px 30px;
            font-size: 1rem;
            border-radius: 10px;
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.2);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--card-border);
            border-radius: 6px;
            width: 42px;
            height: 38px;
            font-size: 1.2rem;
            color: var(--text-secondary);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary-pale);
            color: var(--primary);
        }
        .mobile-menu {
            display: none;
            position: absolute;
            top: 68px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid rgba(45, 111, 163, 0.08);
            box-shadow: 0 16px 32px rgba(30, 41, 59, 0.1);
            z-index: 99;
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu.is-open {
            display: flex;
        }
        .mobile-menu a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 10px 14px;
            border-radius: 8px;
            transition: all var(--transition);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }
        .mobile-menu .lang-toggle {
            margin-top: 12px;
            align-self: flex-start;
        }
        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb i {
            font-size: 0.65rem;
            color: var(--text-weak);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }
        /* Hero */
        .hero-category {
            position: relative;
            padding: 80px 0 64px;
            background: #fff;
            border-bottom: 1px solid var(--card-border);
            overflow: hidden;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 480px;
            height: 100%;
            background: linear-gradient(180deg, rgba(235, 243, 250, 0.3) 0%, rgba(245, 248, 251, 0) 100%);
            z-index: 1;
            pointer-events: none;
        }
        .hero-category .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }
        .hero-category-content h1 {
            font-size: 2.7rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: var(--text);
            margin: 0 0 18px;
            line-height: 1.28;
        }
        .hero-category-content .hero-sub {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 28px;
            max-width: 600px;
        }
        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 8px;
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .hero-stat .stat-value {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .hero-stat .stat-label {
            font-size: 0.82rem;
            color: var(--text-secondary);
        }
        .hero-category-image {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow-hover);
        }
        .hero-category-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            border-radius: var(--radius-card);
        }
        .hero-category-image::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-card);
            background: linear-gradient(180deg, rgba(15, 27, 41, 0) 55%, rgba(15, 27, 41, 0.35) 100%);
            pointer-events: none;
        }
        .hero-img-caption {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            z-index: 2;
            color: #fff;
            font-size: 0.9rem;
            font-weight: 500;
            text-shadow: 0 2px 8px rgba(15, 27, 41, 0.5);
        }
        /* Cards */
        .card-grid {
            display: grid;
            gap: 24px;
        }
        .card-grid--2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid--3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid--4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .card {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 28px;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
            border-color: rgba(45, 111, 163, 0.18);
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin: 0 0 6px;
            color: var(--text);
        }
        .card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--primary-pale);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
        }
        .card .card-tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }
        .card-image {
            border-radius: var(--radius-img);
            overflow: hidden;
            margin: -4px 0 8px;
        }
        .card-image img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--radius-img);
            transition: transform 0.4s ease;
        }
        .card:hover .card-image img {
            transform: scale(1.03);
        }
        .card .btn-outline {
            align-self: flex-start;
            margin-top: 8px;
        }
        /* Intro block */
        .intro-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }
        .intro-block .intro-text {
            font-size: 1.05rem;
            color: var(--text);
            line-height: 1.9;
        }
        .intro-block .intro-text p {
            margin-bottom: 20px;
        }
        .intro-highlight {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 32px;
        }
        .intro-highlight h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-pale);
        }
        .intro-highlight ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .intro-highlight ul li {
            padding: 10px 0;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(45, 111, 163, 0.06);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .intro-highlight ul li:last-child {
            border-bottom: none;
        }
        .intro-highlight ul li i {
            color: var(--accent-green);
            font-size: 0.85rem;
        }
        /* Deep content */
        .deep-content {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 48px;
        }
        .deep-content .article-body {
            font-size: 1.02rem;
            line-height: 1.9;
            color: var(--text);
        }
        .deep-content .article-body p {
            margin-bottom: 22px;
        }
        .deep-content .article-body h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin: 28px 0 14px;
            color: var(--text);
        }
        .deep-content .article-body ul,
        .deep-content .article-body ol {
            margin: 0 0 22px 22px;
            padding: 0;
        }
        .deep-content .article-body li {
            margin-bottom: 10px;
            color: var(--text);
        }
        .deep-content .article-image {
            margin: 24px 0;
            border-radius: var(--radius-img);
            overflow: hidden;
        }
        .deep-content .article-image img {
            width: 100%;
            height: auto;
            max-height: 420px;
            object-fit: cover;
            border-radius: var(--radius-img);
        }
        .deep-content .article-image figcaption {
            font-size: 0.85rem;
            color: var(--text-weak);
            margin-top: 10px;
            text-align: center;
        }
        /* Compare table */
        .compare-section {
            background: var(--bg-alt);
        }
        .compare-wrap {
            display: grid;
            grid-template-columns: 0.8fr 1fr 1fr;
            gap: 0;
            background: #fff;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--card-border);
        }
        .compare-header {
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
            text-align: center;
            padding: 20px 16px;
            background: var(--primary);
        }
        .compare-header.compare-header--alt {
            background: var(--text);
        }
        .compare-header:first-child {
            background: transparent;
            color: var(--text-secondary);
            font-size: 0.85rem;
            font-weight: 600;
            text-align: left;
            padding: 20px 24px;
        }
        .compare-cell {
            padding: 20px 24px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            border-top: 1px solid rgba(45, 111, 163, 0.06);
            line-height: 1.6;
            text-align: center;
        }
        .compare-cell:first-child {
            font-weight: 600;
            color: var(--text);
            text-align: left;
            font-size: 0.9rem;
            background: rgba(245, 248, 251, 0.6);
        }
        .compare-cell .highlight {
            color: var(--primary);
            font-weight: 600;
        }
        .compare-cell .highlight-alt {
            color: var(--accent);
            font-weight: 600;
        }
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item.open {
            background: #EBF3FA;
            border-color: rgba(45, 111, 163, 0.18);
            box-shadow: var(--card-shadow-hover);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-family: var(--font-stack);
            line-height: 1.5;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .faq-question i {
            font-size: 0.9rem;
            color: var(--primary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            display: none;
            padding: 0 24px 22px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }
        .faq-item.open .faq-answer {
            display: block;
            animation: faqFade 0.3s ease;
        }
        @keyframes faqFade {
            from {
                opacity: 0;
                transform: translateY(-6px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        /* CTA */
        .cta-band {
            background: var(--primary-dark);
            border-radius: var(--radius-card);
            padding: 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: 0 20px 44px rgba(30, 41, 59, 0.16);
        }
        .cta-band h3 {
            color: #fff;
            font-size: 1.6rem;
            font-weight: 700;
            margin: 0 0 8px;
            letter-spacing: -0.02em;
        }
        .cta-band p {
            color: rgba(255, 255, 255, 0.82);
            font-size: 1rem;
            margin: 0;
            max-width: 460px;
        }
        .cta-band .btn {
            flex-shrink: 0;
        }
        .btn-accent {
            background: var(--accent);
            color: #1E293B;
            border-color: var(--accent);
            box-shadow: 0 6px 18px rgba(230, 162, 60, 0.28);
        }
        .btn-accent:hover {
            background: #d9912e;
            border-color: #d9912e;
            color: #1E293B;
            box-shadow: 0 10px 26px rgba(230, 162, 60, 0.35);
            transform: translateY(-1px);
        }
        /* Footer */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
            margin-top: 0;
        }
        .site-footer .container {
            padding-bottom: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            display: inline-block;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }
        .footer-grid > div > p {
            font-size: 0.9rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.6);
            margin: 0 0 12px;
        }
        .footer-grid h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin: 0 0 16px;
            letter-spacing: 0.02em;
        }
        .footer-grid ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-grid ul li {
            margin-bottom: 10px;
        }
        .footer-grid ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: color var(--transition);
        }
        .footer-grid ul li a:hover {
            color: #fff;
        }
        .footer-grid a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: color var(--transition);
        }
        .footer-grid a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 22px 0 28px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav-desktop {
                gap: 2px;
            }
            .main-nav-desktop a {
                padding: 8px 8px;
                font-size: 0.82rem;
            }
            .hero-category .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-category-content h1 {
                font-size: 2.2rem;
            }
            .intro-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .compare-wrap {
                grid-template-columns: 0.7fr 1fr 1fr;
                font-size: 0.85rem;
            }
            .compare-cell,
            .compare-header {
                padding: 16px 14px;
                font-size: 0.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .deep-content {
                padding: 32px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-pad: 60px;
                --section-pad-mobile: 44px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .section-heading h2 {
                font-size: 1.6rem;
            }
            .main-nav-desktop {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .lang-toggle button {
                padding: 5px 10px;
                font-size: 0.72rem;
            }
            .hero-category {
                padding: 48px 0 40px;
            }
            .hero-category-content h1 {
                font-size: 1.9rem;
            }
            .hero-category-content .hero-sub {
                font-size: 1rem;
            }
            .hero-category-image img {
                height: 220px;
            }
            .hero-stats-row {
                gap: 16px;
            }
            .hero-stat .stat-value {
                font-size: 1.3rem;
            }
            .card-grid--2,
            .card-grid--3,
            .card-grid--4 {
                grid-template-columns: 1fr;
            }
            .card {
                padding: 22px;
            }
            .compare-wrap {
                grid-template-columns: 1fr;
                border-radius: var(--radius-card);
                overflow: hidden;
            }
            .compare-header {
                text-align: center;
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .compare-header:first-child {
                text-align: center;
                padding: 14px 16px;
            }
            .compare-cell {
                text-align: center;
                padding: 14px 16px;
                font-size: 0.85rem;
                border-top: none;
                border-bottom: 1px solid rgba(45, 111, 163, 0.06);
            }
            .compare-cell:first-child {
                text-align: center;
                font-weight: 700;
                background: var(--primary-pale);
            }
            .compare-wrap .compare-header:nth-child(2),
            .compare-wrap .compare-header:nth-child(3) {
                background: var(--primary-dark);
            }
            .compare-wrap .compare-header:nth-child(3) {
                background: var(--text);
            }
            .cta-band {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
                align-items: stretch;
            }
            .cta-band h3 {
                font-size: 1.3rem;
            }
            .cta-band .btn {
                align-self: center;
            }
            .faq-question {
                font-size: 0.92rem;
                padding: 16px 18px;
            }
            .faq-answer {
                padding: 0 18px 18px;
                font-size: 0.9rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                padding-bottom: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
                padding: 18px 0 24px;
            }
            .site-footer {
                padding: 40px 0 0;
            }
            .deep-content {
                padding: 24px;
            }
            .deep-content .article-body {
                font-size: 0.95rem;
            }
            .container,
            .container-wide,
            .container-narrow {
                padding: 0 18px;
            }
            .section {
                padding: var(--section-pad-mobile) 0;
            }
            .btn-lg {
                padding: 12px 22px;
                font-size: 0.9rem;
            }
            .intro-highlight {
                padding: 22px;
            }
            .site-header .container-wide {
                min-height: 60px;
                gap: 12px;
            }
            .mobile-menu {
                top: 60px;
            }
            .btn-sm {
                padding: 6px 12px;
                font-size: 0.75rem;
            }
            .brand-logo {
                font-size: 1.25rem;
            }
            .brand-badge {
                font-size: 0.6rem;
            }
        }
        @media (max-width: 520px) {
            .header-actions .btn {
                display: none;
            }
            .hero-category-content h1 {
                font-size: 1.65rem;
            }
            .hero-category-image img {
                height: 180px;
            }
            .section-heading h2 {
                font-size: 1.4rem;
            }
            .card {
                padding: 18px;
            }
            .card h3 {
                font-size: 1.05rem;
            }
            .deep-content .article-body h3 {
                font-size: 1.15rem;
            }
            .hero-stats-row {
                flex-direction: column;
                gap: 10px;
            }
            .hero-stat .stat-value {
                font-size: 1.2rem;
            }
        }

/* roulang page: category7 */
:root {
            --primary: #2D6FA3;
            --primary-dark: #255D8A;
            --primary-light: #3F83C4;
            --primary-pale: #EBF3FA;
            --bg: #F5F8FB;
            --bg-alt: #EDF2F7;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-weak: #94A3B8;
            --accent: #E6A23C;
            --accent-green: #26A69A;
            --card-border: rgba(45, 111, 163, 0.08);
            --card-shadow: 0 8px 22px rgba(30, 41, 59, 0.06);
            --card-shadow-hover: 0 14px 34px rgba(30, 41, 59, 0.1);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 20px;
            --radius-img: 10px;
            --section-pad: 88px;
            --section-pad-mobile: 52px;
            --footer-bg: #0F1B29;
            --font-stack: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: 0.22s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.72;
            margin: 0;
            padding: 0;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-stack);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-pad) 0;
        }

        .section--alt {
            background: #fff;
        }

        .section--pale {
            background: var(--primary-pale);
        }

        .section-heading {
            margin-bottom: 44px;
        }

        .section-heading h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin: 0 0 12px;
        }

        .section-heading p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0;
            line-height: 1.75;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-pale);
            border-radius: var(--radius-badge);
            padding: 5px 14px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .section-tag--accent {
            color: #b97a1a;
            background: rgba(230, 162, 60, 0.12);
        }

        .section-tag--green {
            color: #1f8a7e;
            background: rgba(38, 166, 154, 0.12);
        }

        /* Header & Nav */
        .site-header {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(45, 111, 163, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 8px rgba(30, 41, 59, 0.04);
        }

        .site-header .container-wide {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            flex-wrap: nowrap;
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--primary-dark);
        }

        .brand-badge {
            font-size: 0.65rem;
            font-weight: 700;
            color: var(--accent);
            background: rgba(230, 162, 60, 0.12);
            padding: 3px 8px;
            border-radius: 4px;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .main-nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }

        .main-nav-desktop a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 6px;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .main-nav-desktop a:hover,
        .main-nav-desktop a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .lang-toggle {
            display: flex;
            align-items: center;
            gap: 2px;
            background: var(--bg-alt);
            border-radius: 20px;
            padding: 3px;
            flex-shrink: 0;
        }

        .lang-toggle button {
            background: transparent;
            border: none;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 6px 12px;
            border-radius: 18px;
            cursor: pointer;
            transition: all var(--transition);
            letter-spacing: 0.03em;
        }

        .lang-toggle button.active {
            background: var(--primary);
            color: #fff;
        }

        .lang-toggle button:hover:not(.active) {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.92rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(45, 111, 163, 0.25);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-pale);
            color: var(--primary-dark);
            border-color: var(--primary);
            box-shadow: 0 6px 16px rgba(45, 111, 163, 0.12);
        }

        .btn-outline:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-slim {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 0.83rem;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 1.2rem;
            padding: 8px 12px;
            cursor: pointer;
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-pale);
            color: var(--primary);
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--card-border);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 10px 12px;
            border-radius: 6px;
            transition: all var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
            background: var(--primary-pale);
        }

        .mobile-menu .lang-toggle {
            margin-top: 12px;
            align-self: flex-start;
            flex-shrink: 0;
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: #fff;
            border-bottom: 1px solid var(--card-border);
            padding: 14px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-weak);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .separator {
            color: var(--text-weak);
            font-size: 0.75rem;
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* Hero */
        .hero-category {
            background: #fff;
            border-bottom: 1px solid var(--card-border);
            padding: 56px 0 48px;
            position: relative;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 380px;
            height: 100%;
            background: linear-gradient(135deg, transparent 55%, rgba(45, 111, 163, 0.04) 100%);
            pointer-events: none;
        }

        .hero-category .container {
            position: relative;
            z-index: 1;
        }

        .hero-category h1 {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text);
            margin: 0 0 16px;
            line-height: 1.25;
        }

        .hero-category .hero-sub {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 0 24px;
            line-height: 1.7;
        }

        .hero-meta {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-weak);
        }

        .hero-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .hero-meta i {
            color: var(--primary);
            font-size: 0.9rem;
        }

        /* Category Summary */
        .category-summary {
            background: var(--bg);
            padding: 48px 0;
        }

        .summary-card {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 36px 40px;
        }

        .summary-card p {
            font-size: 1.03rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin: 0 0 18px;
        }

        .summary-card p:last-child {
            margin-bottom: 0;
        }

        .summary-card strong {
            color: var(--text);
            font-weight: 600;
        }

        /* Comparison Table */
        .comparison-section {
            background: #fff;
        }

        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-top: 12px;
        }

        .comparison-card {
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 32px 30px;
            background: #fff;
            transition: all var(--transition);
        }

        .comparison-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .comparison-card--highlight {
            border-color: rgba(45, 111, 163, 0.2);
            background: linear-gradient(160deg, #fff 60%, var(--primary-pale) 100%);
        }

        .comparison-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .comparison-card h3 i {
            color: var(--primary);
            font-size: 1.1rem;
        }

        .comparison-card .card-label {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(230, 162, 60, 0.1);
            border-radius: var(--radius-badge);
            padding: 4px 12px;
            display: inline-block;
            margin-bottom: 16px;
        }

        .comparison-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .comparison-card li {
            padding: 12px 0 12px 28px;
            position: relative;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.65;
            border-bottom: 1px solid var(--card-border);
        }

        .comparison-card li:last-child {
            border-bottom: none;
        }

        .comparison-card li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 18px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
            opacity: 0.7;
        }

        .comparison-card--highlight li::before {
            background: var(--accent);
            opacity: 0.9;
        }

        /* Deep Dive */
        .deep-section {
            background: var(--bg);
        }

        .deep-content {
            background: #fff;
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 40px 44px;
            max-width: 900px;
            margin: 0 auto;
        }

        .deep-content h2 {
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text);
            margin: 0 0 20px;
            line-height: 1.35;
        }

        .deep-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin: 28px 0 12px;
        }

        .deep-content p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin: 0 0 18px;
        }

        .deep-content strong {
            color: var(--text);
        }

        .deep-content .deep-quote {
            border-left: 3px solid var(--primary);
            background: var(--primary-pale);
            border-radius: 0 var(--radius-card) var(--radius-card) 0;
            padding: 18px 22px;
            margin: 20px 0;
            font-size: 0.98rem;
            color: var(--text);
            line-height: 1.8;
        }

        .deep-content .deep-quote i {
            color: var(--primary);
            margin-right: 8px;
        }

        /* FAQ */
        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all var(--transition);
            background: #fff;
        }

        .faq-item:hover {
            border-color: rgba(45, 111, 163, 0.2);
            box-shadow: 0 4px 14px rgba(30, 41, 59, 0.05);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            background: #fff;
            border: none;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            transition: all var(--transition);
            line-height: 1.5;
        }

        .faq-question i {
            color: var(--primary);
            font-size: 0.9rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-question:hover {
            background: var(--primary-pale);
        }

        .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            background: #fff;
        }

        .faq-item.open .faq-question {
            background: var(--primary-pale);
            color: var(--primary-dark);
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            border-radius: var(--radius-card);
            margin: 0 auto;
            max-width: 1050px;
            padding: 52px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: -0.01em;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.82);
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.75;
        }

        .cta-section .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-cta-light {
            background: #fff;
            color: var(--primary-dark);
            border-color: #fff;
        }

        .btn-cta-light:hover {
            background: var(--primary-pale);
            color: var(--primary-dark);
            border-color: var(--primary-pale);
            box-shadow: 0 8px 22px rgba(0, 0, 0, 0.18);
        }

        .btn-cta-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }

        .btn-cta-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-color: #fff;
            box-shadow: 0 8px 22px rgba(0, 0, 0, 0.15);
        }

        /* Footer */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 28px;
            margin-top: 72px;
        }

        .site-footer .container {
            max-width: 1200px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            display: block;
            margin-bottom: 14px;
        }

        .site-footer p {
            font-size: 0.9rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.6);
            margin: 0;
        }

        .site-footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
            letter-spacing: 0.03em;
        }

        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer ul li {
            margin-bottom: 10px;
        }

        .site-footer ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }

        .site-footer ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px 28px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
            align-items: center;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1180px) {
            .main-nav-desktop {
                gap: 0;
            }
            .main-nav-desktop a {
                padding: 8px 8px;
                font-size: 0.82rem;
            }
            .brand-logo {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 1024px) {
            .main-nav-desktop {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .header-actions .lang-toggle {
                display: none;
            }
            .comparison-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 52px;
            }
            .hero-category {
                padding: 40px 0 36px;
            }
            .hero-category h1 {
                font-size: 1.8rem;
            }
            .hero-category .hero-sub {
                font-size: 1rem;
            }
            .deep-content {
                padding: 28px 22px;
            }
            .deep-content h2 {
                font-size: 1.4rem;
            }
            .summary-card {
                padding: 26px 22px;
            }
            .cta-section {
                padding: 38px 28px;
                margin: 0 12px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .section-heading h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                gap: 8px 16px;
                font-size: 0.75rem;
            }
        }

        @media (max-width: 520px) {
            .container,
            .container-wide,
            .container-narrow {
                padding: 0 16px;
            }
            .hero-category h1 {
                font-size: 1.55rem;
            }
            .comparison-card {
                padding: 24px 20px;
            }
            .comparison-card h3 {
                font-size: 1.1rem;
            }
            .cta-section {
                padding: 30px 20px;
            }
            .cta-actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero-meta {
                gap: 12px;
                font-size: 0.78rem;
            }
        }