/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1a2e;
            --primary-light: #1a2d4a;
            --primary-dark: #080e1a;
            --accent: #d4a84b;
            --accent-light: #e8c06a;
            --accent-dark: #b88d2e;
            --bg-warm: #f8f6f2;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text-dark: #1a1a2e;
            --text-body: #3d3d5c;
            --text-muted: #7a7a9a;
            --text-light: #b0b0c8;
            --border-light: #e8e6e0;
            --border-card: #f0ede8;
            --shadow-sm: 0 2px 8px rgba(15, 26, 46, 0.06);
            --shadow-md: 0 8px 30px rgba(15, 26, 46, 0.08);
            --shadow-lg: 0 20px 60px rgba(15, 26, 46, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-warm);
        }
        a { color: var(--accent-dark); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.3; }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
        p { margin-bottom: 0.8em; }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(15, 26, 46, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(212, 168, 75, 0.15);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo i { color: var(--accent); font-size: 1.2rem; }
        .logo span { background: linear-gradient(135deg, #fff, var(--accent-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; color: #fff; }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            color: rgba(255,255,255,0.8);
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .nav-list a:hover { color: #fff; background: rgba(212, 168, 75, 0.12); }
        .nav-list a.active {
            color: var(--accent);
            background: rgba(212, 168, 75, 0.15);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; padding: 8px; }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-list {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: rgba(15, 26, 46, 0.98);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid rgba(212, 168, 75, 0.1);
                backdrop-filter: blur(16px);
            }
            .nav-list.open { transform: translateY(0); opacity: 1; }
            .nav-list a { width: 100%; padding: 12px 16px; font-size: 1rem; }
            .nav-list a.active::after { display: none; }
        }

        /* ===== Hero Section ===== */
        .hero {
            min-height: 80vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            margin-top: var(--nav-height);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,26,46,0.88) 0%, rgba(15,26,46,0.6) 50%, rgba(212,168,75,0.15) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 120px;
            background: linear-gradient(to top, var(--bg-warm), transparent);
            z-index: 2;
        }
        .hero .container {
            position: relative;
            z-index: 3;
            padding-top: 40px;
            padding-bottom: 80px;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212, 168, 75, 0.15);
            border: 1px solid rgba(212, 168, 75, 0.25);
            color: var(--accent-light);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i { font-size: 0.75rem; }
        .hero h1 {
            color: #fff;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent-light), #f5d98a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(212, 168, 75, 0.35);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(212, 168, 75, 0.45); color: var(--primary-dark); }
        .btn-outline-light {
            background: transparent;
            border: 2px solid rgba(255,255,255,0.3);
            color: #fff;
        }
        .btn-outline-light:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.5); color: #fff; transform: translateY(-2px); }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat { text-align: center; }
        .hero-stat .num { font-size: 1.8rem; font-weight: 800; color: var(--accent-light); display: block; }
        .hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-top: 4px; }
        @media (max-width: 768px) {
            .hero { min-height: 70vh; }
            .hero-stats { gap: 24px; }
            .hero-stat .num { font-size: 1.4rem; }
        }
        @media (max-width: 520px) {
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt { background: var(--bg-white); }
        .section-dark {
            background: var(--primary);
            color: rgba(255,255,255,0.85);
        }
        .section-dark h2, .section-dark h3 { color: #fff; }
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
        }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { color: var(--text-muted); font-size: 1.05rem; }
        .section-dark .section-header p { color: rgba(255,255,255,0.6); }
        .section-header .subtitle {
            display: inline-block;
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }
        @media (max-width: 768px) { .section { padding: 56px 0; } }

        /* ===== Features / Cards Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 768px) { .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 20px; } }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-card);
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .card-body { padding: 24px; }
        .card-body h3 { font-size: 1.2rem; margin-bottom: 8px; }
        .card-body p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 0; }
        .card-tag {
            display: inline-block;
            background: rgba(212, 168, 75, 0.12);
            color: var(--accent-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
        }
        .feature-card {
            text-align: center;
            padding: 36px 24px;
            border-radius: var(--radius-md);
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .feature-card .icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(212,168,75,0.12), rgba(212,168,75,0.04));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--accent);
        }
        .feature-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
        .feature-card p { font-size: 0.93rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== Stats / Numbers ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item { padding: 24px; }
        .stat-item .num { font-size: 2.4rem; font-weight: 800; color: var(--accent); display: block; }
        .stat-item .label { font-size: 0.95rem; color: rgba(255,255,255,0.7); margin-top: 6px; }
        @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

        /* ===== Content / CMS List ===== */
        .content-list { display: flex; flex-direction: column; gap: 20px; }
        .content-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px;
            border: 1px solid var(--border-card);
            transition: var(--transition);
            align-items: flex-start;
        }
        .content-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .content-item .thumb {
            width: 120px;
            height: 80px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--border-light);
        }
        .content-item .info { flex: 1; }
        .content-item .info h3 { font-size: 1.05rem; margin-bottom: 6px; }
        .content-item .info h3 a { color: var(--text-dark); }
        .content-item .info h3 a:hover { color: var(--accent-dark); }
        .content-item .meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .content-item .meta span { display: inline-flex; align-items: center; gap: 4px; }
        .content-item .excerpt {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .empty-msg {
            text-align: center;
            padding: 48px 24px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-light);
        }
        .empty-msg i { font-size: 2rem; margin-bottom: 12px; display: block; color: var(--text-light); }
        @media (max-width: 520px) {
            .content-item { flex-direction: column; }
            .content-item .thumb { width: 100%; height: 140px; }
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid var(--border-card);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .step-card .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .step-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }
        @media (max-width: 768px) { .steps-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .steps-grid { grid-template-columns: 1fr; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid var(--border-card);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 1rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover { background: rgba(212,168,75,0.04); }
        .faq-question i { color: var(--accent); transition: var(--transition); font-size: 0.9rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover;
            opacity: 0.08;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { color: #fff; margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.75); max-width: 600px; margin: 0 auto 32px; font-size: 1.05rem; }
        .cta-section .btn-primary { font-size: 1.1rem; padding: 16px 40px; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.65);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        .footer-brand .logo { margin-bottom: 12px; }
        .footer-brand p { font-size: 0.9rem; max-width: 320px; line-height: 1.7; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Misc Utilities ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(212,168,75,0.12);
            color: var(--accent-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 50px;
        }
        .section-divider { height: 1px; background: var(--border-light); margin: 0; border: none; }

        /* focus-visible for accessibility */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --accent: #e94560;
            --accent-hover: #d63850;
            --accent-glow: rgba(233, 69, 96, 0.25);
            --gold: #f5c518;
            --gold-light: #ffe082;
            --bg-dark: #0f0f1a;
            --bg-card: #1a1a2e;
            --bg-card-hover: #222240;
            --bg-section: #12121f;
            --text-primary: #f0f0f5;
            --text-secondary: #b0b0c5;
            --text-muted: #7a7a95;
            --border-color: #2a2a45;
            --border-light: #3a3a55;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.35);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.45);
            --shadow-glow: 0 0 30px rgba(233,69,96,0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
        }
        a { color: var(--gold); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--gold-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        p:last-child { margin-bottom: 0; }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 15, 26, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .logo i {
            color: var(--gold);
            font-size: 1.6rem;
            text-shadow: 0 0 16px rgba(245, 197, 24, 0.25);
        }
        .logo span { background: linear-gradient(135deg, #f0f0f5, var(--gold)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover span { background: linear-gradient(135deg, var(--gold), #fff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list { display: flex; align-items: center; gap: 6px; }
        .nav-list a {
            display: flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-list a:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
        .nav-list a.active {
            color: var(--gold);
            background: rgba(245, 197, 24, 0.1);
            box-shadow: inset 0 -2px 0 var(--gold);
        }
        .nav-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; padding: 8px; border-radius: var(--radius-sm); transition: var(--transition); }
        .nav-toggle:hover { background: rgba(255,255,255,0.06); }

        /* ===== Article Hero ===== */
        .article-hero {
            padding: calc(var(--nav-height) + 60px) 0 50px;
            background: var(--bg-section);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 1; }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 28px;
            margin-bottom: 20px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-meta i { margin-right: 6px; color: var(--gold); width: 16px; text-align: center; }
        .article-meta .category-badge {
            display: inline-block;
            background: rgba(233, 69, 96, 0.15);
            color: var(--accent);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 600;
            border: 1px solid rgba(233, 69, 96, 0.2);
        }
        .article-hero h1 {
            font-size: 2.6rem;
            max-width: 900px;
            margin-bottom: 12px;
            background: linear-gradient(135deg, #fff, var(--gold-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .article-hero p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 780px;
            line-height: 1.8;
        }

        /* ===== Article Content ===== */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg-dark);
        }
        .article-content-wrap {
            max-width: 820px;
            margin: 0 auto;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 52px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }
        .article-content-wrap .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article-content-wrap .article-body h2,
        .article-content-wrap .article-body h3,
        .article-content-wrap .article-body h4 {
            color: var(--text-primary);
            margin-top: 2rem;
            margin-bottom: 0.8rem;
        }
        .article-content-wrap .article-body h2 { font-size: 1.7rem; border-left: 4px solid var(--gold); padding-left: 16px; }
        .article-content-wrap .article-body h3 { font-size: 1.35rem; }
        .article-content-wrap .article-body p { margin-bottom: 1.2rem; }
        .article-content-wrap .article-body ul,
        .article-content-wrap .article-body ol { margin: 1rem 0 1.5rem 1.6rem; }
        .article-content-wrap .article-body li { margin-bottom: 0.5rem; color: var(--text-secondary); list-style: disc; }
        .article-content-wrap .article-body a { color: var(--gold); text-decoration: underline; text-underline-offset: 3px; }
        .article-content-wrap .article-body a:hover { color: var(--gold-light); }
        .article-content-wrap .article-body img { margin: 1.5rem 0; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
        .article-content-wrap .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(233, 69, 96, 0.06);
            padding: 16px 24px;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content-wrap .article-body code {
            background: rgba(255,255,255,0.06);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--gold-light);
        }
        .article-content-wrap .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
        }
        .article-content-wrap .article-body th,
        .article-content-wrap .article-body td {
            border: 1px solid var(--border-color);
            padding: 12px 16px;
            text-align: left;
            color: var(--text-secondary);
        }
        .article-content-wrap .article-body th {
            background: rgba(255,255,255,0.04);
            color: var(--text-primary);
            font-weight: 600;
        }
        .article-content-wrap .article-body tr:nth-child(even) td { background: rgba(255,255,255,0.02); }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }
        .not-found-box i { font-size: 4rem; color: var(--text-muted); margin-bottom: 24px; display: block; }
        .not-found-box h2 { font-size: 1.8rem; margin-bottom: 12px; color: var(--text-primary); }
        .not-found-box p { color: var(--text-muted); margin-bottom: 28px; font-size: 1.05rem; }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(233,69,96,0.25);
        }
        .not-found-box .btn-back:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(233,69,96,0.35); color: #fff; }

        /* ===== Article Nav (prev/next) ===== */
        .article-nav-wrap {
            max-width: 820px;
            margin: 40px auto 0;
            display: flex;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .article-nav-wrap a {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-secondary);
            font-size: 0.95rem;
            transition: var(--transition);
            max-width: 380px;
        }
        .article-nav-wrap a:hover { border-color: var(--gold); color: var(--gold); background: rgba(245,197,24,0.04); transform: translateY(-2px); }
        .article-nav-wrap a i { font-size: 1.1rem; }

        /* ===== Related Section ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-section);
            border-top: 1px solid var(--border-color);
        }
        .related-section h2 {
            text-align: center;
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .related-section .section-sub {
            text-align: center;
            color: var(--text-muted);
            margin-bottom: 48px;
            font-size: 1.05rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-6px); border-color: var(--accent); box-shadow: var(--shadow-glow); }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .related-card .card-body {
            padding: 22px 24px 26px;
        }
        .related-card .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h3 a { color: inherit; }
        .related-card .card-body h3 a:hover { color: var(--gold); }
        .related-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .related-card .card-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .related-card .card-meta i { margin-right: 4px; color: var(--gold); font-size: 0.75rem; }

        /* ===== CTA ===== */
        .article-cta {
            padding: 60px 0;
            background: var(--bg-dark);
        }
        .article-cta .cta-box {
            max-width: 820px;
            margin: 0 auto;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 50px 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .article-cta .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .article-cta .cta-box h2 { font-size: 1.8rem; margin-bottom: 14px; position: relative; z-index: 1; }
        .article-cta .cta-box p { color: var(--text-secondary); margin-bottom: 28px; font-size: 1.05rem; position: relative; z-index: 1; max-width: 600px; margin-left: auto; margin-right: auto; }
        .article-cta .cta-box .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: var(--accent);
            color: #fff;
            padding: 16px 44px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            box-shadow: 0 4px 25px rgba(233,69,96,0.3);
            position: relative;
            z-index: 1;
        }
        .article-cta .cta-box .btn-cta:hover { background: var(--accent-hover); transform: translateY(-3px) scale(1.02); box-shadow: 0 10px 40px rgba(233,69,96,0.4); color: #fff; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { font-size: 1.3rem; margin-bottom: 16px; }
        .footer-brand p { font-size: 0.92rem; color: var(--text-muted); max-width: 340px; line-height: 1.7; }
        .footer-col h4 { font-size: 0.95rem; color: var(--text-primary); margin-bottom: 18px; font-weight: 600; letter-spacing: 0.3px; }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--gold); padding-left: 4px; }
        .footer-col a i { width: 20px; text-align: center; margin-right: 6px; color: var(--gold); font-size: 0.85rem; }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 28px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--gold); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            .nav-list { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(15,15,26,0.98); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); flex-direction: column; padding: 16px 24px 24px; border-bottom: 1px solid var(--border-color); box-shadow: var(--shadow-md); }
            .nav-list.open { display: flex; }
            .nav-list a { width: 100%; padding: 12px 16px; font-size: 1rem; }
            .nav-toggle { display: block; }
            .article-hero { padding: calc(var(--nav-height) + 40px) 0 36px; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-hero p { font-size: 1rem; }
            .article-content-wrap { padding: 28px 22px; }
            .article-content-wrap .article-body { font-size: 1rem; }
            .article-content-wrap .article-body h2 { font-size: 1.4rem; }
            .related-grid { grid-template-columns: 1fr; max-width: 480px; margin-left: auto; margin-right: auto; }
            .article-nav-wrap { flex-direction: column; align-items: stretch; }
            .article-nav-wrap a { max-width: 100%; justify-content: center; }
            .article-cta .cta-box { padding: 36px 24px; }
            .article-cta .cta-box h2 { font-size: 1.4rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.5rem; }
            .article-content-wrap { padding: 20px 14px; border-radius: var(--radius-md); }
            .article-content-wrap .article-body { font-size: 0.95rem; }
            .article-content-wrap .article-body h2 { font-size: 1.25rem; padding-left: 12px; }
            .related-card .card-img { height: 140px; }
            .related-card .card-body { padding: 16px 18px 20px; }
            .article-cta .cta-box { padding: 28px 18px; }
            .article-cta .cta-box h2 { font-size: 1.2rem; }
            .article-cta .cta-box .btn-cta { padding: 14px 30px; font-size: 0.95rem; }
            .logo { font-size: 1.15rem; }
            .logo i { font-size: 1.3rem; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #1a3a6b;
            --color-primary-light: #2563eb;
            --color-primary-dark: #0f2a4a;
            --color-accent: #f59e0b;
            --color-accent-light: #fbbf24;
            --color-accent-dark: #d97706;
            --color-bg: #f8fafc;
            --color-bg-alt: #ffffff;
            --color-bg-dark: #0f172a;
            --color-text: #1e293b;
            --color-text-light: #64748b;
            --color-text-inverse: #f1f5f9;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-error: #ef4444;
            --color-warning: #f59e0b;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 24px 60px 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, sans-serif;
            --container-max: 1200px;
            --header-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-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
        }

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

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

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

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        button:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.3px;
            transition: opacity var(--transition);
            text-decoration: none;
        }

        .logo:hover {
            opacity: 0.85;
            color: var(--color-primary);
        }

        .logo i {
            font-size: 26px;
            color: var(--color-accent);
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .logo span {
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            text-decoration: none;
            letter-spacing: 0.2px;
        }

        .nav-list a:hover {
            background: rgba(26, 58, 107, 0.06);
            color: var(--color-primary);
        }

        .nav-list a.active {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(26, 58, 107, 0.25);
        }

        .nav-list a.active:hover {
            background: var(--color-primary-dark);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--color-text);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(26, 58, 107, 0.06);
        }

        /* ===== Hero Section ===== */
        .hero-section {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
            position: relative;
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 80px;
            background: var(--color-bg);
            clip-path: ellipse(70% 100% at 50% 100%);
        }

        .hero-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 14px;
            color: var(--color-text-inverse);
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .hero-badge i {
            color: var(--color-accent);
            font-size: 16px;
        }

        .hero-title {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            text-decoration: none;
            letter-spacing: 0.3px;
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--color-accent);
            color: #1e293b;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
        }

        .btn-primary:hover {
            background: var(--color-accent-dark);
            color: #1e293b;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.45);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
            box-shadow: none;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline-light:active {
            transform: translateY(0);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 18px;
            border-radius: var(--radius-lg);
        }

        /* ===== Stats Bar ===== */
        .stats-bar {
            padding: 40px 0;
            background: var(--color-bg-alt);
            border-bottom: 1px solid var(--color-border);
        }

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

        .stat-item {
            text-align: center;
            padding: 16px 8px;
        }

        .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
            letter-spacing: -0.5px;
        }

        .stat-number .plus {
            color: var(--color-accent);
            font-weight: 700;
        }

        .stat-label {
            font-size: 15px;
            color: var(--color-text-light);
            margin-top: 6px;
            font-weight: 500;
        }

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

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

        .section-dark {
            background: var(--color-bg-dark);
            color: var(--color-text-inverse);
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary-light);
            background: rgba(37, 99, 235, 0.08);
            padding: 4px 16px;
            border-radius: 50px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

        .section-tag i {
            font-size: 14px;
        }

        .section-title {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-text);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-dark .section-title {
            color: #fff;
        }

        .section-sub {
            font-size: 18px;
            color: var(--color-text-light);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Features Section ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--color-bg-alt);
            border-radius: var(--radius-lg);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, 0.15);
        }

        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 28px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(37, 99, 235, 0.04));
            color: var(--color-primary-light);
            transition: all var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
            color: #fff;
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--color-text);
        }

        .feature-card p {
            font-size: 15px;
            color: var(--color-text-light);
            line-height: 1.7;
        }

        /* ===== Sports Categories ===== */
        .sports-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .sport-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--color-bg-alt);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            text-decoration: none;
            display: block;
            position: relative;
        }

        .sport-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, 0.15);
        }

        .sport-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: transform 0.5s ease;
        }

        .sport-card:hover .card-img {
            transform: scale(1.05);
        }

        .sport-card .card-body {
            padding: 20px 22px 24px;
        }

        .sport-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .sport-card .card-body p {
            font-size: 14px;
            color: var(--color-text-light);
            line-height: 1.6;
        }

        .sport-card .card-badge {
            position: absolute;
            top: 14px;
            right: 14px;
            background: var(--color-accent);
            color: #1e293b;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 50px;
            box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
        }

        /* ===== Process / How It Works ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-step {
            text-align: center;
            padding: 32px 20px;
            background: var(--color-bg-alt);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            position: relative;
        }

        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .process-step p {
            font-size: 14px;
            color: var(--color-text-light);
            line-height: 1.7;
        }

        .process-connector {
            display: none;
        }

        /* ===== Testimonials / Reviews ===== */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .testimonial-card {
            background: var(--color-bg-alt);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }

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

        .testimonial-stars {
            color: var(--color-accent);
            font-size: 16px;
            margin-bottom: 14px;
            letter-spacing: 2px;
        }

        .testimonial-card blockquote {
            font-size: 15px;
            color: var(--color-text);
            line-height: 1.8;
            margin-bottom: 18px;
            font-style: normal;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-author .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .testimonial-author .info {
            text-align: left;
        }

        .testimonial-author .info strong {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            display: block;
        }

        .testimonial-author .info span {
            font-size: 13px;
            color: var(--color-text-light);
        }

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

        .faq-item {
            background: var(--color-bg-alt);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.2);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            background: transparent;
            text-align: left;
            transition: background var(--transition);
            gap: 16px;
        }

        .faq-question:hover {
            background: rgba(37, 99, 235, 0.03);
        }

        .faq-question .icon {
            font-size: 18px;
            color: var(--color-primary-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

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

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

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

        .faq-answer p {
            font-size: 15px;
            color: var(--color-text-light);
            line-height: 1.8;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-title {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .cta-sub {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-cta {
            background: #fff;
            color: var(--color-primary);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }

        .btn-cta:hover {
            background: var(--color-accent);
            color: #1e293b;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(245, 158, 11, 0.35);
        }

        .btn-cta-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.35);
        }

        .btn-cta-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
        }

        .site-footer .logo {
            color: #fff;
            margin-bottom: 14px;
        }

        .site-footer .logo i {
            -webkit-text-fill-color: var(--color-accent);
        }

        .site-footer .logo span {
            -webkit-text-fill-color: #fff;
            background: none;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 8px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 5px 0;
            transition: color var(--transition), padding-left var(--transition);
            text-decoration: none;
        }

        .footer-col a:hover {
            color: var(--color-accent);
            padding-left: 6px;
        }

        .footer-col a i {
            width: 20px;
            text-align: center;
            margin-right: 6px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
        }

        .footer-bottom a:hover {
            color: var(--color-accent);
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-to-top:hover {
            background: var(--color-primary-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 40px;
            }

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

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

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

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

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }

            .nav-toggle {
                display: block;
            }

            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 20px;
                gap: 6px;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 999;
            }

            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }

            .hero-section {
                padding: 110px 0 60px;
                min-height: auto;
            }

            .hero-title {
                font-size: 32px;
            }

            .hero-sub {
                font-size: 17px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: center;
            }

            .btn-lg {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-number {
                font-size: 28px;
            }

            .section {
                padding: 56px 0;
            }

            .section-title {
                font-size: 28px;
            }

            .section-sub {
                font-size: 16px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .sports-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .sport-card .card-img {
                height: 180px;
            }

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

            .testimonials-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .cta-title {
                font-size: 28px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: center;
            }

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

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

            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 18px;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 26px;
            }

            .hero-sub {
                font-size: 15px;
            }

            .section-title {
                font-size: 24px;
            }

            .stat-number {
                font-size: 24px;
            }

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

            .faq-question {
                font-size: 15px;
                padding: 14px 18px;
            }

            .faq-answer p {
                font-size: 14px;
            }

            .btn {
                padding: 12px 24px;
                font-size: 15px;
            }

            .btn-lg {
                padding: 14px 28px;
                font-size: 16px;
            }
        }

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

        .mt-16 {
            margin-top: 16px;
        }

        .mt-24 {
            margin-top: 24px;
        }

        .mb-16 {
            margin-bottom: 16px;
        }

        .mb-24 {
            margin-bottom: 24px;
        }

        .gap-8 {
            gap: 8px;
        }

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