/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #F97316;
            --primary-dark: #EA580C;
            --primary-light: #FDBA74;
            --secondary: #1E3A5F;
            --secondary-light: #2D5A8E;
            --accent: #10B981;
            --accent-dark: #059669;
            --bg: #F8FAFC;
            --bg-alt: #F1F5F9;
            --bg-dark: #0F172A;
            --text: #1E293B;
            --text-light: #64748B;
            --text-inverse: #F8FAFC;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.14);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.6;
            min-height: 100vh;
            padding-top: var(--nav-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2.2rem, 6vw, 3.8rem);
        }
        h2 {
            font-size: clamp(1.6rem, 4vw, 2.6rem);
        }
        h3 {
            font-size: clamp(1.2rem, 3vw, 1.7rem);
        }
        h4 {
            font-size: 1.2rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-inverse);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: var(--text-inverse);
        }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-sub {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            color: var(--text-light);
            font-size: 1.1rem;
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Floating Dock Navigation ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            padding: 0 24px;
            pointer-events: none;
        }
        .nav-dock {
            pointer-events: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1100px;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-radius: 60px;
            padding: 8px 20px 8px 28px;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.5);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .nav-dock:hover {
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.10);
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--secondary);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .nav-brand .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 10px;
            color: #fff;
            font-size: 1.1rem;
        }
        .nav-brand span {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--text);
            background: rgba(0, 0, 0, 0.04);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(249, 115, 22, 0.10);
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 30px;
            padding: 0 16px;
            height: 38px;
            gap: 8px;
            border: 1px solid transparent;
            transition: all var(--transition);
            width: 180px;
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.10);
        }
        .nav-search input {
            flex: 1;
            background: none;
            font-size: 0.88rem;
            color: var(--text);
            height: 100%;
        }
        .nav-search input::placeholder {
            color: var(--text-light);
        }
        .nav-search i {
            color: var(--text-light);
            font-size: 0.85rem;
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 8px 22px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.30);
            white-space: nowrap;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.40);
            color: #fff;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--text);
            padding: 4px 8px;
            border-radius: 8px;
            cursor: pointer;
        }
        .nav-toggle:hover {
            background: var(--bg-alt);
        }

        /* Mobile nav */
        .mobile-menu {
            display: none;
            position: fixed;
            top: calc(var(--nav-height) + 8px);
            left: 24px;
            right: 24px;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            padding: 20px;
            z-index: 999;
            border: 1px solid var(--border);
            opacity: 0;
            transform: translateY(-12px) scale(0.96);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            pointer-events: none;
        }
        .mobile-menu.open {
            opacity: 1;
            transform: translateY(0) scale(1);
            pointer-events: auto;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 1rem;
            color: var(--text);
            transition: background var(--transition);
        }
        .mobile-menu a:hover {
            background: var(--bg-alt);
        }
        .mobile-menu a.active {
            color: var(--primary);
            background: rgba(249, 115, 22, 0.08);
        }
        .mobile-menu .mobile-cta {
            margin-top: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            text-align: center;
            padding: 14px;
            border-radius: var(--radius-sm);
            font-weight: 600;
        }
        .mobile-menu .mobile-cta:hover {
            color: #fff;
            opacity: 0.92;
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.25);
            z-index: 998;
            backdrop-filter: blur(2px);
        }
        .mobile-overlay.open {
            display: block;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 60px 24px;
            overflow: hidden;
            background: var(--bg-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1.00);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(15, 23, 42, 0.88) 0%,
                    rgba(30, 58, 95, 0.70) 50%,
                    rgba(15, 23, 42, 0.88) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            padding: 20px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(249, 115, 22, 0.18);
            color: var(--primary-light);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
            border: 1px solid rgba(249, 115, 22, 0.20);
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            color: #fff;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary), #FCD34D);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: clamp(1.05rem, 2vw, 1.3rem);
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 20px rgba(249, 115, 22, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(249, 115, 22, 0.45);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.30);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(249, 115, 22, 0.10);
            transform: translateY(-3px);
            color: #fff;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 48px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.10);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat .num span {
            color: var(--primary);
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 4px;
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
            margin-top: 16px;
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: linear-gradient(135deg, rgba(249, 115, 22, 0.10), rgba(249, 115, 22, 0.04));
            color: var(--primary);
            font-size: 1.6rem;
            margin-bottom: 20px;
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            transform: scale(1.05);
        }
        .feature-card h3 {
            margin-bottom: 12px;
            font-size: 1.25rem;
        }
        .feature-card p {
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ===== Category Entry ===== */
        .category-showcase {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: #fff;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            min-height: 320px;
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .category-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .category-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .card-img img {
            transform: scale(1.06);
        }
        .category-card .card-img .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(0, 0, 0, 0.30) 0%, transparent 60%);
        }
        .category-card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .card-body h3 {
            margin-bottom: 8px;
        }
        .category-card .card-body p {
            font-size: 0.92rem;
            margin-bottom: 16px;
            flex: 1;
        }
        .category-card .card-footer {
            padding: 0 24px 20px;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.88rem;
            border-radius: 30px;
        }

        /* ===== Popular / Content Cards ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .content-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .content-card .card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .content-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .content-card:hover .card-img img {
            transform: scale(1.06);
        }
        .content-card .card-img .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(249, 115, 22, 0.92);
            color: #fff;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }
        .content-card .card-body {
            padding: 20px;
        }
        .content-card .card-body h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .content-card .card-body p {
            font-size: 0.88rem;
            margin-bottom: 12px;
            color: var(--text-light);
        }
        .content-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .content-card .card-meta i {
            margin-right: 4px;
        }

        /* ===== CMS News List ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            display: flex;
            align-items: stretch;
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .news-item:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-lg);
        }
        .news-item .news-date {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-width: 90px;
            padding: 16px 12px;
            background: var(--bg-alt);
            text-align: center;
            flex-shrink: 0;
        }
        .news-item .news-date .day {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
        }
        .news-item .news-date .month {
            font-size: 0.78rem;
            color: var(--text-light);
            font-weight: 500;
        }
        .news-item .news-body {
            padding: 16px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .news-item .news-body h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
            line-height: 1.35;
        }
        .news-item .news-body h4 a:hover {
            color: var(--primary);
        }
        .news-item .news-body p {
            font-size: 0.88rem;
            margin-bottom: 0;
            color: var(--text-light);
        }
        .news-item .news-body .news-tags {
            display: flex;
            gap: 8px;
            margin-top: 8px;
        }
        .news-item .news-body .news-tags span {
            font-size: 0.72rem;
            padding: 2px 10px;
            border-radius: 12px;
            background: var(--bg-alt);
            color: var(--text-light);
            font-weight: 500;
        }
        .news-empty {
            text-align: center;
            padding: 48px 24px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            color: var(--text-light);
            font-size: 1.05rem;
        }
        .news-empty i {
            font-size: 2.4rem;
            color: var(--border);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 28px;
            text-align: center;
        }
        .stat-card {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            padding: 32px 20px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
            backdrop-filter: blur(4px);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-4px);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .stat-card .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-card .stat-num span {
            color: var(--primary);
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            gap: 16px;
            user-select: none;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--text-light);
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 0.92rem;
            margin-bottom: 0;
            color: var(--text-light);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary), #0F172A);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 16px;
            position: relative;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
            position: relative;
        }
        .cta-section .btn {
            position: relative;
        }
        .cta-section .btn-outline {
            border-color: rgba(255, 255, 255, 0.25);
        }
        .cta-section .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-brand {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .nav-brand span {
            -webkit-text-fill-color: #fff;
            color: #fff;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.5);
            transition: all var(--transition);
            font-size: 0.9rem;
            padding: 0;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            padding: 0;
        }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 99;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 20px rgba(249, 115, 22, 0.35);
            transition: all var(--transition);
            opacity: 0;
            pointer-events: none;
            transform: translateY(20px);
        }
        .back-top.visible {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }
        .back-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(249, 115, 22, 0.45);
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .nav-search {
                width: 140px;
            }
        }
        @media (max-width: 820px) {
            .nav-links {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .mobile-menu {
                display: block;
            }
            .nav-dock {
                padding: 6px 16px 6px 20px;
            }
            .hero {
                min-height: 70vh;
                padding: 40px 20px;
            }
            .hero-stats {
                gap: 24px;
            }
            .section {
                padding: 56px 0;
            }
            .cta-section {
                padding: 40px 24px;
                border-radius: var(--radius);
            }
            .news-item {
                flex-direction: column;
            }
            .news-item .news-date {
                flex-direction: row;
                min-width: auto;
                padding: 12px 20px;
                gap: 8px;
            }
            .news-item .news-date .day {
                font-size: 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            :root {
                --nav-height: 64px;
            }
            .site-header {
                top: 10px;
                padding: 0 12px;
            }
            .nav-dock {
                padding: 4px 12px 4px 16px;
                border-radius: 40px;
            }
            .nav-brand {
                font-size: 1.1rem;
            }
            .nav-brand .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .hero {
                min-height: 60vh;
                padding: 32px 16px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .hero-stats {
                gap: 16px;
                padding-top: 24px;
                margin-top: 28px;
            }
            .hero-stat .num {
                font-size: 1.4rem;
            }
            .section {
                padding: 40px 0;
            }
            .section-sub {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .features-grid,
            .category-showcase,
            .content-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card {
                padding: 20px 16px;
            }
            .stat-card .stat-num {
                font-size: 1.6rem;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
            .mobile-menu {
                left: 12px;
                right: 12px;
                top: calc(var(--nav-height) + 6px);
                padding: 16px;
            }
        }
        @media (max-width: 380px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .nav-brand {
                font-size: 1rem;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #4F46E5;
            --primary-dark: #3730A3;
            --primary-light: #818CF8;
            --primary-bg: #EEF2FF;
            --secondary: #10B981;
            --secondary-dark: #059669;
            --secondary-light: #6EE7B7;
            --accent: #F59E0B;
            --accent-dark: #D97706;
            --bg: #F8FAFC;
            --bg-card: #FFFFFF;
            --bg-dark: #0F172A;
            --bg-section: #F1F5F9;
            --text: #1E293B;
            --text-secondary: #475569;
            --text-weak: #94A3B8;
            --text-white: #FFFFFF;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.16);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }

        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Dock Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 24px;
            pointer-events: none;
            height: var(--header-h);
        }

        .nav-dock {
            max-width: 1080px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(18px) saturate(1.6);
            -webkit-backdrop-filter: blur(18px) saturate(1.6);
            border-radius: 60px;
            padding: 8px 20px 8px 24px;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.10);
            border: 1px solid rgba(255, 255, 255, 0.6);
            pointer-events: auto;
            transition: box-shadow var(--transition), border-color var(--transition);
        }

        .nav-dock:hover {
            box-shadow: 0 6px 28px rgba(0, 0, 0, 0.14);
            border-color: rgba(255, 255, 255, 0.85);
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--primary);
            flex-shrink: 0;
        }

        .nav-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            box-shadow: 0 2px 8px rgba(79, 70, 229, 0.30);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }

        .nav-links a {
            padding: 6px 18px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }

        .nav-links a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }

        .nav-links a.active {
            background: var(--primary);
            color: white;
            box-shadow: 0 2px 12px rgba(79, 70, 229, 0.30);
        }

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

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg);
            border-radius: 40px;
            padding: 6px 16px;
            border: 1px solid var(--border);
            transition: border-color var(--transition), box-shadow var(--transition);
            color: var(--text-weak);
        }

        .nav-search:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
        }

        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            font-size: 0.85rem;
            color: var(--text);
            width: 120px;
            transition: width var(--transition);
        }

        .nav-search input::placeholder {
            color: var(--text-weak);
        }

        .nav-search input:focus {
            width: 160px;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: white !important;
            padding: 8px 22px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.88rem;
            box-shadow: 0 2px 12px rgba(79, 70, 229, 0.25);
            transition: transform var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.35);
            color: white !important;
        }

        .nav-toggle {
            display: none;
            font-size: 1.3rem;
            color: var(--text-secondary);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--bg-section);
        }

        /* Mobile Menu Overlay */
        .mobile-menu-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.40);
            backdrop-filter: blur(4px);
            z-index: 2000;
            display: none;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .mobile-menu-overlay.open {
            display: block;
            opacity: 1;
        }

        .mobile-menu-panel {
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 300px;
            max-width: 80vw;
            background: white;
            z-index: 2001;
            padding: 28px 24px;
            box-shadow: -8px 0 32px rgba(0, 0, 0, 0.15);
            transform: translateX(100%);
            transition: transform var(--transition);
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .mobile-menu-panel.open {
            transform: translateX(0);
        }

        .mobile-menu-panel .panel-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }

        .mobile-menu-panel .panel-header .nav-brand {
            font-size: 1.1rem;
        }

        .mobile-menu-panel .close-btn {
            font-size: 1.5rem;
            color: var(--text-secondary);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }

        .mobile-menu-panel .close-btn:hover {
            background: var(--bg-section);
        }

        .mobile-menu-panel .mobile-nav-links {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .mobile-menu-panel .mobile-nav-links a {
            padding: 12px 16px;
            border-radius: var(--radius-md);
            font-weight: 500;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition);
        }

        .mobile-menu-panel .mobile-nav-links a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }

        .mobile-menu-panel .mobile-nav-links a.active {
            background: var(--primary);
            color: white;
        }

        .mobile-menu-panel .mobile-search {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--bg);
            border-radius: var(--radius-md);
            padding: 10px 16px;
            border: 1px solid var(--border);
        }

        .mobile-menu-panel .mobile-search input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            font-size: 0.95rem;
            color: var(--text);
        }

        .mobile-menu-panel .mobile-search input::placeholder {
            color: var(--text-weak);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 80px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.75) 0%, rgba(30, 27, 75, 0.60) 100%);
            z-index: 1;
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 760px;
            color: var(--text-white);
        }

        .category-hero .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.20);
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            color: rgba(255, 255, 255, 0.90);
        }

        .category-hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.20);
        }

        .category-hero h1 span {
            color: var(--secondary-light);
        }

        .category-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .hero-stats .stat-item {
            text-align: center;
            color: rgba(255, 255, 255, 0.90);
        }

        .hero-stats .stat-item .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: block;
            line-height: 1.2;
        }

        .hero-stats .stat-item .label {
            font-size: 0.82rem;
            opacity: 0.75;
            margin-top: 2px;
        }

        /* ===== Section Common ===== */
        section {
            padding: 80px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .section-title p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-title .title-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        /* ===== Category Tags ===== */
        .category-tags-wrap {
            background: var(--bg-section);
            padding: 24px 0;
            border-bottom: 1px solid var(--border);
        }

        .category-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .category-tags .tag {
            padding: 8px 22px;
            border-radius: 40px;
            font-size: 0.88rem;
            font-weight: 500;
            background: white;
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: default;
        }

        .category-tags .tag:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: var(--primary-bg);
        }

        .category-tags .tag.active-tag {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            box-shadow: 0 2px 12px rgba(79, 70, 229, 0.25);
        }

        /* ===== Guide Cards Grid ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .guide-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            background: var(--bg-section);
        }

        .guide-card .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-card .card-body .card-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 40px;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .guide-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .guide-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }

        .guide-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
            font-size: 0.82rem;
            color: var(--text-weak);
        }

        .guide-card .card-footer .meta-left {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .guide-card .card-footer .meta-left i {
            margin-right: 4px;
        }

        .guide-card .card-footer .read-more {
            color: var(--primary);
            font-weight: 600;
            transition: gap var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .guide-card .card-footer .read-more:hover {
            gap: 8px;
        }

        /* ===== Popular List ===== */
        .popular-section {
            background: var(--bg-section);
        }

        .popular-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .popular-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .popular-item .rank {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary-light);
            min-width: 40px;
            text-align: center;
            line-height: 1;
        }

        .popular-item .rank.top1 {
            color: var(--accent);
        }
        .popular-item .rank.top2 {
            color: var(--secondary);
        }
        .popular-item .rank.top3 {
            color: var(--primary);
        }

        .popular-item .item-info {
            flex: 1;
        }

        .popular-item .item-info h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text);
        }

        .popular-item .item-info p {
            font-size: 0.84rem;
            color: var(--text-secondary);
        }

        .popular-item .item-stats {
            font-size: 0.82rem;
            color: var(--text-weak);
            text-align: right;
            white-space: nowrap;
        }

        .popular-item .item-stats i {
            margin-right: 4px;
            color: var(--secondary);
        }

        /* ===== Stats / Data Section ===== */
        .stats-section {
            background: var(--bg-dark);
            color: white;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.82);
            z-index: 1;
        }

        .stats-section .container {
            position: relative;
            z-index: 2;
        }

        .stats-section .section-title h2 {
            color: white;
        }

        .stats-section .section-title p {
            color: rgba(255, 255, 255, 0.70);
        }

        .stats-section .section-title .title-tag {
            background: rgba(255, 255, 255, 0.15);
            color: rgba(255, 255, 255, 0.90);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }

        .stats-grid .stat-card {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: var(--radius-lg);
            padding: 32px 20px;
            transition: transform var(--transition), background var(--transition);
        }

        .stats-grid .stat-card:hover {
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.12);
        }

        .stats-grid .stat-card .icon {
            font-size: 2rem;
            color: var(--secondary-light);
            margin-bottom: 12px;
        }

        .stats-grid .stat-card .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: block;
            line-height: 1.2;
        }

        .stats-grid .stat-card .label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }

        .faq-item .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: background var(--transition);
            user-select: none;
        }

        .faq-item .faq-question:hover {
            background: var(--bg-section);
        }

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

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

        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }

        .faq-item .faq-answer.show {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            text-align: center;
            padding: 72px 24px;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: white;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 520px;
            margin: 0 auto 28px;
        }

        .cta-section .cta-btn {
            display: inline-block;
            background: white;
            color: var(--primary-dark);
            padding: 14px 40px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .cta-section .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 32px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .site-footer .footer-brand .nav-brand {
            color: white;
            margin-bottom: 14px;
        }

        .site-footer .footer-brand .nav-brand .brand-icon {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
        }

        .site-footer .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.60);
            line-height: 1.7;
            max-width: 360px;
        }

        .site-footer .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: white;
            margin-bottom: 16px;
        }

        .site-footer .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            padding: 4px 0;
            transition: color var(--transition);
        }

        .site-footer .footer-col a:hover {
            color: white;
        }

        .site-footer .footer-col a i {
            margin-right: 8px;
            width: 18px;
            text-align: center;
        }

        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.84rem;
            color: rgba(255, 255, 255, 0.40);
        }

        .site-footer .footer-social {
            display: flex;
            gap: 14px;
        }

        .site-footer .footer-social a {
            color: rgba(255, 255, 255, 0.40);
            font-size: 1.1rem;
            transition: color var(--transition), transform var(--transition);
        }

        .site-footer .footer-social a:hover {
            color: white;
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .category-hero h1 {
                font-size: 2.6rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-dock {
                padding: 6px 16px 6px 18px;
            }
            .category-hero {
                min-height: 340px;
                padding: 100px 20px 60px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stats .stat-item .num {
                font-size: 1.4rem;
            }
            section {
                padding: 56px 0;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }
            .guide-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
            .popular-list {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .stats-grid {
                gap: 16px;
            }
            .stats-grid .stat-card {
                padding: 24px 16px;
            }
            .stats-grid .stat-card .num {
                font-size: 1.6rem;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .nav-dock {
                padding: 6px 12px 6px 14px;
            }
            .nav-brand {
                font-size: 1rem;
            }
            .nav-brand .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .hero-stats .stat-item .num {
                font-size: 1.2rem;
            }
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .guide-card .card-body {
                padding: 16px 18px 18px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stats-grid .stat-card {
                padding: 18px 12px;
            }
            .stats-grid .stat-card .num {
                font-size: 1.3rem;
            }
            .category-tags .tag {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .faq-item .faq-question {
                padding: 14px 18px;
                font-size: 0.92rem;
            }
            .faq-item .faq-answer {
                padding: 0 18px 14px;
                font-size: 0.88rem;
            }
            .cta-section {
                padding: 48px 20px;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
            .cta-section .cta-btn {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
            section {
                padding: 40px 0;
            }
            .section-title {
                margin-bottom: 32px;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
            .container {
                padding: 0 16px;
            }
            .site-header {
                padding: 8px 12px;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-in {
            animation: fadeUp 0.6s ease forwards;
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg: #0b0f1a;
            --bg-card: #131a2b;
            --bg-elevated: #1a2340;
            --bg-soft: #0f1628;
            --text: #f1f3f5;
            --text-weak: #8a95ad;
            --text-muted: #5a677a;
            --border: #2a3450;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.3);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1240px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: var(--text);
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav Dock ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 24px;
            background: transparent;
            pointer-events: none;
        }
        .site-header .nav-dock {
            pointer-events: auto;
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(11, 15, 26, 0.82);
            backdrop-filter: blur(18px) saturate(1.2);
            -webkit-backdrop-filter: blur(18px) saturate(1.2);
            border: 1px solid var(--border);
            border-radius: 60px;
            padding: 10px 20px 10px 28px;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.5);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
            font-weight: 700;
            font-size: 20px;
            letter-spacing: -0.3px;
            transition: opacity var(--transition);
        }
        .nav-brand:hover {
            opacity: 0.85;
            color: var(--text);
        }
        .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 50%;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            padding: 6px 16px;
            border-radius: 30px;
            color: var(--text-weak);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 2px 12px rgba(230, 57, 70, 0.35);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border);
            border-radius: 30px;
            padding: 6px 16px;
            color: var(--text-weak);
            transition: all var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.08);
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.15);
        }
        .nav-search input {
            min-width: 140px;
            font-size: 14px;
            color: var(--text);
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search i {
            font-size: 14px;
        }
        .nav-cta {
            padding: 8px 22px;
            border-radius: 30px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
            white-space: nowrap;
        }
        .nav-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.4);
            color: #fff !important;
        }
        .nav-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            color: var(--text);
            font-size: 18px;
            cursor: pointer;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* Mobile menu drawer */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(6px);
            z-index: 1999;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        .mobile-drawer.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-drawer-inner {
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            width: 300px;
            max-width: 80vw;
            background: var(--bg-card);
            border-left: 1px solid var(--border);
            padding: 32px 24px;
            display: flex;
            flex-direction: column;
            gap: 18px;
            transform: translateX(100%);
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: -8px 0 40px rgba(0, 0, 0, 0.5);
        }
        .mobile-drawer.open .mobile-drawer-inner {
            transform: translateX(0);
        }
        .mobile-drawer-inner .drawer-close {
            align-self: flex-end;
            background: none;
            border: none;
            color: var(--text-weak);
            font-size: 22px;
            padding: 4px;
            cursor: pointer;
            transition: color var(--transition);
        }
        .mobile-drawer-inner .drawer-close:hover {
            color: var(--text);
        }
        .mobile-drawer-inner a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-weak);
            font-size: 17px;
            font-weight: 500;
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .mobile-drawer-inner a:hover {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text);
            border-color: var(--border);
        }
        .mobile-drawer-inner a.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
        }

        @media (max-width: 820px) {
            .nav-links {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .site-header {
                padding: 10px 16px;
            }
            .site-header .nav-dock {
                padding: 8px 16px 8px 20px;
                border-radius: 40px;
            }
            .nav-brand {
                font-size: 17px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }
            .mobile-drawer {
                display: block;
            }
        }
        @media (min-width: 821px) {
            .mobile-drawer {
                display: none !important;
            }
        }

        /* ===== Hero / Page Banner ===== */
        .page-banner {
            padding-top: calc(var(--nav-height) + 48px);
            padding-bottom: 52px;
            position: relative;
            background: var(--bg-soft);
            overflow: hidden;
            min-height: 240px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 15, 26, 0.92) 0%, rgba(11, 15, 26, 0.6) 60%, transparent 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .banner-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }
        .banner-category {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 30px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .banner-date {
            color: var(--text-weak);
            font-size: 14px;
        }
        .banner-date i {
            margin-right: 4px;
        }
        .page-banner h1 {
            font-size: clamp(28px, 4vw, 48px);
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            max-width: 860px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .banner-desc {
            font-size: 16px;
            color: var(--text-weak);
            max-width: 680px;
            margin-top: 14px;
            line-height: 1.7;
        }

        /* ===== Main Content ===== */
        .main-content {
            padding: 48px 0 80px;
        }
        .content-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .content-body {
            min-width: 0;
        }
        .content-body .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 40px 44px;
            box-shadow: var(--shadow-sm);
        }
        .article-body h2 {
            font-size: 26px;
            font-weight: 700;
            margin-top: 36px;
            margin-bottom: 16px;
            color: #fff;
            line-height: 1.3;
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }
        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            margin-top: 28px;
            margin-bottom: 12px;
            color: #f0f2f5;
        }
        .article-body p {
            margin-bottom: 18px;
            color: var(--text);
            line-height: 1.8;
            font-size: 16px;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 18px;
            padding-left: 24px;
            color: var(--text);
        }
        .article-body li {
            margin-bottom: 8px;
            line-height: 1.7;
            list-style: disc;
        }
        .article-body ol li {
            list-style: decimal;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(230, 57, 70, 0.06);
            padding: 16px 22px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-weak);
            font-style: italic;
        }
        .article-body a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--accent);
        }
        .article-body .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-body .tag-list span {
            padding: 4px 14px;
            border-radius: 30px;
            background: var(--bg-elevated);
            color: var(--text-weak);
            font-size: 13px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .article-body .tag-list span:hover {
            border-color: var(--primary);
            color: var(--text);
        }

        .content-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 24px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h4 i {
            color: var(--primary);
        }
        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid transparent;
            transition: all var(--transition);
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.4;
        }
        .sidebar-list a:hover {
            background: rgba(255, 255, 255, 0.05);
            border-color: var(--border);
            color: var(--text);
        }
        .sidebar-list a .s-num {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--bg-elevated);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            color: var(--text-muted);
        }
        .sidebar-list a:nth-child(1) .s-num {
            background: var(--primary);
            color: #fff;
        }
        .sidebar-list a:nth-child(2) .s-num {
            background: var(--secondary-light);
            color: #fff;
        }
        .sidebar-list a:nth-child(3) .s-num {
            background: var(--accent);
            color: #fff;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            border: none;
            text-align: center;
            padding: 28px 20px;
        }
        .sidebar-cta h4 {
            color: #fff;
            justify-content: center;
        }
        .sidebar-cta p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            margin-bottom: 16px;
        }
        .sidebar-cta .btn {
            display: inline-block;
            padding: 10px 28px;
            border-radius: 30px;
            background: #fff;
            color: var(--primary-dark) !important;
            font-weight: 700;
            font-size: 14px;
            transition: all var(--transition);
        }
        .sidebar-cta .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
        }

        /* not-found */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
        }
        .not-found-box i {
            font-size: 56px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 24px;
            color: var(--text);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-weak);
            margin-bottom: 24px;
        }
        .not-found-box .btn-back {
            display: inline-block;
            padding: 12px 32px;
            border-radius: 30px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            transition: all var(--transition);
        }
        .not-found-box .btn-back:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.35);
        }

        @media (max-width: 1024px) {
            .content-layout {
                grid-template-columns: 1fr;
            }
            .content-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }
        @media (max-width: 640px) {
            .content-sidebar {
                grid-template-columns: 1fr;
            }
            .content-body .article-body {
                padding: 24px 18px;
            }
            .page-banner {
                padding-top: calc(var(--nav-height) + 24px);
                padding-bottom: 32px;
                min-height: 180px;
            }
            .page-banner h1 {
                font-size: 24px;
            }
            .banner-meta {
                font-size: 13px;
            }
            .article-body h2 {
                font-size: 20px;
            }
            .article-body h3 {
                font-size: 17px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 56px 0 32px;
            margin-top: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-brand {
            margin-bottom: 14px;
            font-size: 18px;
        }
        .footer-brand p {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.7;
            max-width: 340px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: var(--text-weak);
            font-size: 14px;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
        }
        .footer-col a i {
            margin-right: 8px;
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 13px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-elevated);
            color: var(--text-weak);
            font-size: 16px;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            padding: 16px 0 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-weak);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .breadcrumb span {
            color: var(--text-muted);
        }
        .breadcrumb i {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== Focus visible ===== */
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Article nav prev/next ===== */
        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            background: var(--bg-elevated);
            border: 1px solid var(--border);
            color: var(--text-weak);
            font-size: 14px;
            transition: all var(--transition);
            max-width: 45%;
        }
        .article-nav a:hover {
            border-color: var(--primary);
            color: var(--text);
            background: rgba(230, 57, 70, 0.06);
        }
        .article-nav a i {
            font-size: 14px;
        }
        .article-nav .nav-next {
            text-align: right;
            flex-direction: row-reverse;
        }
        @media (max-width: 520px) {
            .article-nav a {
                max-width: 100%;
                width: 100%;
            }
            .article-nav {
                flex-direction: column;
            }
        }