/* roulang page: index */
:root {
            --bg-deep: #030712;
            --bg-card: #0F172A;
            --bg-elevated: #1E293B;
            --accent-cyan: #06B6D4;
            --accent-blue: #2563EB;
            --accent-glow: rgba(6,182,212,0.45);
            --text-main: #F8FAFC;
            --text-soft: #94A3B8;
            --text-label: #60A5FA;
            --border-subtle: rgba(37,99,235,0.25);
            --border-glow: rgba(6,182,212,0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-cyan: 0 0 18px rgba(6,182,212,0.35);
            --shadow-blue: 0 4px 24px rgba(37,99,235,0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a { text-decoration: none; color: inherit; transition: color 0.25s ease; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button, input, select, textarea { font: inherit; }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0; left: 0; width: 100%;
            z-index: 1000;
            background: rgba(3,7,18,0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            font-size: 1.3rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-soft);
            position: relative;
            padding: 4px 0;
            transition: color 0.25s;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--text-main);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.25s ease;
        }
        .nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s;
        }
        .btn-login:hover {
            background: rgba(6,182,212,0.12);
            box-shadow: 0 0 12px rgba(6,182,212,0.25);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 9px 20px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            box-shadow: var(--shadow-cyan);
            transition: all 0.25s;
        }
        .btn-signup:hover {
            box-shadow: 0 0 22px rgba(6,182,212,0.6);
            transform: translateY(-1px);
        }
        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-main);
            font-size: 1.6rem;
            cursor: pointer;
        }
        /* Hero */
        .hero {
            padding: 130px 0 90px;
            background: radial-gradient(ellipse at 30% 20%, rgba(37,99,235,0.15), transparent 70%),
                        radial-gradient(ellipse at 70% 80%, rgba(6,182,212,0.08), transparent 70%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-tag {
            display: inline-block;
            background: rgba(6,182,212,0.15);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.4px;
            margin-bottom: 20px;
        }
        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.6px;
            margin-bottom: 22px;
            background: linear-gradient(135deg, #F8FAFC 0%, #94A3B8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-soft);
            line-height: 1.65;
            margin-bottom: 32px;
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8);
            border: none;
            color: #030712;
            font-weight: 700;
            padding: 13px 32px;
            border-radius: 28px;
            font-size: 1rem;
            cursor: pointer;
            box-shadow: var(--shadow-cyan);
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            box-shadow: 0 0 30px rgba(6,182,212,0.7);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 12px 30px;
            border-radius: 28px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        .btn-outline:hover {
            background: rgba(6,182,212,0.1);
        }
        .trust-badges {
            display: flex;
            gap: 20px;
            margin-top: 28px;
            flex-wrap: wrap;
            color: var(--text-soft);
            font-size: 0.85rem;
        }
        .trust-badges i { color: var(--accent-cyan); margin-right: 5px; }
        .hero-visual {
            background: var(--bg-elevated);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 16px;
            box-shadow: var(--shadow-blue);
            position: relative;
        }
        .hero-visual img {
            border-radius: var(--radius-md);
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        /* Section common */
        .section { padding: 70px 0; }
        .section-head {
            margin-bottom: 44px;
        }
        .section-head h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .section-head p {
            color: var(--text-soft);
            font-size: 1.05rem;
            max-width: 680px;
        }
        /* Pain / Solution */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px,1fr));
            gap: 24px;
        }
        .pain-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }
        .pain-card::after {
            content: '';
            position: absolute;
            top: 0; left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--accent-cyan), transparent);
        }
        .pain-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-cyan);
            transform: translateY(-3px);
        }
        .pain-card h4 { font-size: 1.1rem; margin-bottom: 8px; }
        .pain-card p { color: var(--text-soft); font-size: 0.95rem; line-height: 1.6; }
        .solution-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
            gap: 28px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 30px 22px;
            position: relative;
            counter-increment: step;
        }
        .step-item::before {
            content: counter(step);
            position: absolute;
            top: -16px;
            left: 22px;
            width: 32px;
            height: 32px;
            background: var(--accent-cyan);
            color: #030712;
            font-weight: 800;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
        }
        .step-item h5 { font-size: 1.05rem; margin: 12px 0 6px; }
        .step-item p { color: var(--text-soft); font-size: 0.9rem; }
        /* Demo / Scene */
        .demo-showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .demo-text h3 { font-size: 1.8rem; font-weight: 700; margin-bottom: 14px; }
        .demo-text ul { margin-top: 16px; }
        .demo-text ul li {
            color: var(--text-soft);
            padding-left: 22px;
            position: relative;
            margin-bottom: 10px;
        }
        .demo-text ul li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .demo-img-wrapper {
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            box-shadow: var(--shadow-blue);
        }
        /* Social Proof */
        .stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: space-between;
        }
        .stat-block {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            flex: 1 1 200px;
            transition: box-shadow 0.3s;
        }
        .stat-block:hover { box-shadow: var(--shadow-cyan); }
        .stat-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent-cyan);
        }
        .stat-label { color: var(--text-soft); margin-top: 6px; }
        /* News CMS */
        .news-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 32px;
        }
        .news-main-list .news-item {
            display: flex;
            gap: 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 18px;
            margin-bottom: 18px;
            transition: all 0.3s;
        }
        .news-item:hover { border-color: var(--border-glow); }
        .news-item img {
            width: 120px;
            height: 90px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
        }
        .news-item-content h4 { font-size: 1rem; margin-bottom: 6px; }
        .news-item-content p { color: var(--text-soft); font-size: 0.85rem; }
        .news-sidebar {
            background: var(--bg-elevated);
            border-radius: var(--radius-md);
            padding: 22px;
            border: 1px solid var(--border-subtle);
        }
        /* Pricing */
        .pricing-comparison {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px,1fr));
            gap: 24px;
        }
        .price-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px 24px;
            transition: all 0.3s;
            position: relative;
        }
        .price-card.featured {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan);
        }
        .price-card.featured::after {
            content: 'PHỔ BIẾN';
            position: absolute;
            top: -12px;
            right: 18px;
            background: var(--accent-cyan);
            color: #030712;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 14px;
        }
        .price-value { font-size: 2rem; font-weight: 800; margin: 12px 0; }
        .price-card ul li { color: var(--text-soft); margin: 8px 0; font-size: 0.95rem; }
        /* Guarantee */
        .guarantee-strip {
            background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
            border-radius: var(--radius-lg);
            padding: 40px 28px;
            border: 1px solid var(--border-subtle);
            display: flex;
            gap: 28px;
            align-items: center;
            flex-wrap: wrap;
        }
        /* Form CTA */
        .cta-form-section {
            background: var(--bg-elevated);
            border-radius: var(--radius-lg);
            padding: 50px 36px;
            border: 1px solid var(--border-subtle);
        }
        .form-inline {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-top: 22px;
        }
        .form-inline input {
            flex: 2;
            min-width: 220px;
            background: var(--bg-deep);
            border: 1px solid var(--border-subtle);
            color: var(--text-main);
            padding: 12px 18px;
            border-radius: 24px;
            outline: none;
            transition: border 0.25s;
        }
        .form-inline input:focus { border-color: var(--accent-cyan); }
        .form-inline button { flex: 1; white-space: nowrap; }
        /* Footer */
        .site-footer {
            background: rgba(15,23,42,0.9);
            border-top: 1px solid var(--border-subtle);
            padding: 50px 0 24px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px,1fr));
            gap: 36px;
            margin-bottom: 30px;
        }
        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-main);
        }
        .footer-col a {
            display: block;
            color: var(--text-soft);
            margin-bottom: 8px;
            font-size: 0.9rem;
            transition: color 0.25s;
        }
        .footer-col a:hover { color: var(--accent-cyan); }
        .footer-bottom {
            text-align: center;
            color: var(--text-soft);
            font-size: 0.8rem;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
        }
        /* FAB */
        .fab {
            position: fixed;
            left: 20px;
            bottom: 90px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            box-shadow: 0 0 20px rgba(6,182,212,0.45);
            cursor: pointer;
            transition: all 0.3s;
            border: none;
            animation: float 3s ease-in-out infinite;
        }
        .fab:hover {
            transform: scale(1.12);
            box-shadow: 0 0 32px rgba(6,182,212,0.7);
        }
        @keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.4rem; }
            .hero-grid { grid-template-columns: 1fr; gap: 32px; }
            .demo-showcase { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .mobile-toggle { display: block; }
            .hero { padding: 110px 0 60px; }
            .hero h1 { font-size: 2rem; }
            .section { padding: 50px 0; }
            .guarantee-strip { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .hero-cta-group { flex-direction: column; width: 100%; }
            .btn-primary, .btn-outline { width: 100%; justify-content: center; }
            .container { padding: 0 16px; }
            .nav-auth { gap: 8px; }
            .btn-login, .btn-signup { padding: 7px 14px; font-size: 0.8rem; }
        }

/* roulang page: article */
:root {
            --bg-deep: #030712;
            --bg-card: #0F172A;
            --bg-elevated: #1E293B;
            --accent-cyan: #06B6D4;
            --accent-blue: #2563EB;
            --accent-glow: rgba(6,182,212,0.45);
            --text-main: #F8FAFC;
            --text-soft: #94A3B8;
            --text-label: #60A5FA;
            --border-subtle: rgba(37,99,235,0.25);
            --border-glow: rgba(6,182,212,0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-cyan: 0 0 18px rgba(6,182,212,0.35);
            --shadow-blue: 0 4px 24px rgba(37,99,235,0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }

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

        button,
        input,
        select,
        textarea {
            font: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(3, 7, 18, 0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }

        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .nav-logo {
            font-size: 1.3rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-soft);
            position: relative;
            padding: 4px 0;
            transition: color 0.25s;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-main);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.25s ease;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s;
        }

        .btn-login:hover {
            background: rgba(6, 182, 212, 0.12);
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.25);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 9px 20px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            box-shadow: var(--shadow-cyan);
            transition: all 0.25s;
        }

        .btn-signup:hover {
            box-shadow: 0 0 22px rgba(6, 182, 212, 0.6);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-main);
            font-size: 1.6rem;
            cursor: pointer;
        }

        /* Article Page Layout */
        .page-wrapper {
            padding-top: 68px;
        }

        .article-hero-banner {
            position: relative;
            padding: 80px 0 60px;
            background: radial-gradient(ellipse at 50% 30%, rgba(37, 99, 235, 0.18), transparent 70%);
            overflow: hidden;
        }

        .article-hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            mix-blend-mode: overlay;
            z-index: 0;
        }

        .article-hero-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .article-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 20px;
        }

        .article-category-tag {
            background: rgba(6, 182, 212, 0.15);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .article-date-tag {
            background: rgba(148, 163, 184, 0.1);
            border: 1px solid rgba(148, 163, 184, 0.2);
            color: var(--text-soft);
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        .article-hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 18px;
            background: linear-gradient(135deg, #F8FAFC 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-hero-excerpt {
            font-size: 1.15rem;
            color: var(--text-soft);
            line-height: 1.7;
            margin-bottom: 24px;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 20px;
            font-style: italic;
        }

        .article-hero-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-blue);
            border: 1px solid var(--border-subtle);
        }

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

        /* Main Content Area */
        .article-main {
            padding: 60px 0;
            background: var(--bg-deep);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 50px;
            align-items: start;
        }

        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border-subtle);
        }

        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-top: 32px;
            margin-bottom: 16px;
            color: var(--text-main);
            line-height: 1.3;
        }

        .article-body h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-top: 24px;
            margin-bottom: 12px;
            color: var(--text-label);
            line-height: 1.35;
        }

        .article-body p {
            font-size: 1rem;
            color: var(--text-soft);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .article-body ul,
        .article-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
            color: var(--text-soft);
            line-height: 1.7;
        }

        .article-body ul li,
        .article-body ol li {
            margin-bottom: 8px;
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            border: 1px solid var(--border-subtle);
        }

        .article-body blockquote {
            background: var(--bg-elevated);
            border-left: 4px solid var(--accent-cyan);
            padding: 20px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-main);
            font-style: italic;
            font-size: 1.05rem;
            line-height: 1.7;
        }

        .article-body strong {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .article-body a {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .article-body a:hover {
            color: #38BDF8;
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
            position: sticky;
            top: 90px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-subtle);
        }

        .sidebar-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--accent-cyan);
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--bg-elevated), var(--bg-card));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
        }

        .sidebar-cta h4 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .sidebar-cta p {
            font-size: 0.9rem;
            color: var(--text-soft);
            margin-bottom: 18px;
            line-height: 1.5;
        }

        .sidebar-cta .btn-primary {
            display: block;
            width: 100%;
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8);
            border: none;
            color: #fff;
            padding: 12px 24px;
            border-radius: 20px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            box-shadow: var(--shadow-cyan);
            transition: all 0.25s;
        }

        .sidebar-cta .btn-primary:hover {
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.55);
            transform: translateY(-1px);
        }

        .sidebar-related-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .sidebar-related-list li a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-soft);
            font-size: 0.95rem;
            transition: color 0.25s;
            line-height: 1.5;
        }

        .sidebar-related-list li a:hover {
            color: var(--accent-cyan);
        }

        .sidebar-related-list li a i {
            color: var(--accent-cyan);
            font-size: 0.8rem;
        }

        /* Bottom CTAs */
        .article-cta-section {
            padding: 60px 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(37, 99, 235, 0.1), transparent 70%);
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .cta-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 40px;
            text-align: left;
            transition: all 0.3s ease;
        }

        .cta-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-cyan);
            transform: translateY(-2px);
        }

        .cta-card h4 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .cta-card p {
            color: var(--text-soft);
            font-size: 1rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .btn-primary {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8);
            border: none;
            color: #fff;
            padding: 12px 28px;
            border-radius: 20px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            box-shadow: var(--shadow-cyan);
            transition: all 0.25s;
            text-align: center;
        }

        .btn-primary:hover {
            box-shadow: 0 0 22px rgba(6, 182, 212, 0.6);
            transform: translateY(-1px);
        }

        .btn-outline {
            display: inline-block;
            background: transparent;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 12px 28px;
            border-radius: 20px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s;
        }

        .btn-outline:hover {
            background: rgba(6, 182, 212, 0.1);
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.25);
        }

        /* Not Found State */
        .not-found-section {
            padding: 120px 0;
            text-align: center;
        }

        .not-found-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .not-found-section p {
            color: var(--text-soft);
            font-size: 1.05rem;
            margin-bottom: 24px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-elevated);
            padding: 60px 0 30px;
            border-top: 1px solid var(--border-subtle);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            color: var(--text-soft);
            font-size: 0.9rem;
            margin-bottom: 8px;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(148, 163, 184, 0.1);
            padding-top: 20px;
            text-align: center;
            color: var(--text-soft);
            font-size: 0.85rem;
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 6px 25px rgba(6, 182, 212, 0.3);
            transition: all 0.3s ease;
            opacity: 0.75;
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.5);
        }

        .fab-support i {
            font-size: 1.5rem;
            color: var(--accent-cyan);
        }

        .fab-badge {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: #EF4444;
            border-radius: 50%;
            border: 2px solid #fff;
            animation: pulse-dot 1.8s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
            }
            50% {
                box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
            }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-hero-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .article-hero-image {
                order: -1;
                max-width: 500px;
                margin: 0 auto;
            }
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                top: auto;
            }
            .cta-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-hero-content h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                width: 100%;
                flex-direction: column;
                background: rgba(3, 7, 18, 0.98);
                backdrop-filter: blur(18px);
                padding: 20px 24px;
                border-bottom: 1px solid var(--border-subtle);
            }

            .nav-links.active {
                display: flex;
            }

            .mobile-toggle {
                display: block;
            }

            .nav-auth {
                gap: 8px;
            }

            .btn-login,
            .btn-signup {
                font-size: 0.8rem;
                padding: 6px 14px;
            }

            .article-body {
                padding: 24px;
            }

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

            .article-hero-excerpt {
                font-size: 1rem;
            }

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

        @media (max-width: 520px) {
            .article-hero-content h1 {
                font-size: 1.5rem;
            }
            .nav-logo {
                font-size: 1rem;
            }
            .fab-support {
                width: 48px;
                height: 48px;
                left: 16px;
                bottom: 80px;
            }
            .fab-support i {
                font-size: 1.2rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #030712;
            --bg-card: #0F172A;
            --bg-elevated: #1E293B;
            --accent-cyan: #06B6D4;
            --accent-blue: #2563EB;
            --accent-glow: rgba(6,182,212,0.45);
            --text-main: #F8FAFC;
            --text-soft: #94A3B8;
            --text-label: #60A5FA;
            --border-subtle: rgba(37,99,235,0.25);
            --border-glow: rgba(6,182,212,0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-cyan: 0 0 18px rgba(6,182,212,0.35);
            --shadow-blue: 0 4px 24px rgba(37,99,235,0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html { scroll-behavior: smooth; font-size: 16px; }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a { text-decoration: none; color: inherit; transition: color 0.25s ease; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font: inherit; }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

        /* Header */
        .site-header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
            background: rgba(3,7,18,0.88); backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle); transition: background 0.3s ease;
        }
        .nav-bar { display: flex; align-items: center; justify-content: space-between; height: 68px; }
        .nav-logo {
            font-size: 1.3rem; font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text; letter-spacing: -0.3px; white-space: nowrap;
        }
        .nav-links { display: flex; align-items: center; gap: 28px; }
        .nav-links a {
            font-size: 0.95rem; font-weight: 500; color: var(--text-soft);
            position: relative; padding: 4px 0; transition: color 0.25s;
        }
        .nav-links a:hover, .nav-links a.active { color: var(--text-main); }
        .nav-links a::after {
            content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
            background: var(--accent-cyan); transition: width 0.25s ease;
        }
        .nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
        .nav-auth { display: flex; align-items: center; gap: 12px; }
        .btn-login {
            background: transparent; border: 1px solid var(--border-glow); color: var(--accent-cyan);
            padding: 8px 18px; border-radius: 20px; font-size: 0.9rem; font-weight: 600;
            cursor: pointer; transition: all 0.25s;
        }
        .btn-login:hover { background: rgba(6,182,212,0.12); box-shadow: 0 0 12px rgba(6,182,212,0.25); }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none; color: #fff; padding: 9px 20px; border-radius: 20px;
            font-size: 0.9rem; font-weight: 600; cursor: pointer;
            box-shadow: var(--shadow-cyan); transition: all 0.25s;
        }
        .btn-signup:hover { box-shadow: 0 0 22px rgba(6,182,212,0.6); transform: translateY(-1px); }
        .mobile-toggle { display: none; background: transparent; border: none; color: var(--text-main); font-size: 1.6rem; cursor: pointer; }

        /* Category Hero */
        .cat-hero {
            padding: 130px 0 80px;
            background: radial-gradient(ellipse at 30% 20%, rgba(37,99,235,0.12), transparent 65%),
                        radial-gradient(ellipse at 70% 80%, rgba(6,182,212,0.06), transparent 65%);
            position: relative; overflow: hidden;
        }
        .cat-hero::before {
            content: ''; position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover; background-position: center;
            opacity: 0.14; mix-blend-mode: overlay;
        }
        .cat-hero-content { position: relative; z-index: 1; max-width: 820px; }
        .cat-badge {
            display: inline-block; background: rgba(6,182,212,0.15);
            border: 1px solid var(--border-glow); color: var(--accent-cyan);
            padding: 5px 14px; border-radius: 18px; font-size: 0.82rem;
            font-weight: 600; letter-spacing: 0.3px; margin-bottom: 16px;
        }
        .cat-hero h1 {
            font-size: 2.8rem; font-weight: 800; line-height: 1.2;
            letter-spacing: -0.5px; margin-bottom: 18px;
            background: linear-gradient(135deg, #F8FAFC 0%, #CBD5E1 100%);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cat-hero-desc {
            font-size: 1.05rem; color: var(--text-soft); line-height: 1.7; margin-bottom: 28px;
        }
        .hero-cta-group { display: flex; gap: 14px; flex-wrap: wrap; }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8); border: none;
            color: #030712; padding: 12px 28px; border-radius: 24px; font-size: 1rem;
            font-weight: 700; cursor: pointer; box-shadow: var(--shadow-cyan);
            transition: all 0.3s; display: inline-flex; align-items: center; gap: 8px;
        }
        .btn-primary:hover { box-shadow: 0 0 26px rgba(6,182,212,0.65); transform: translateY(-2px); }
        .btn-outline-light {
            background: transparent; border: 1px solid var(--border-glow); color: var(--accent-cyan);
            padding: 11px 24px; border-radius: 24px; font-size: 0.95rem;
            font-weight: 600; cursor: pointer; transition: all 0.3s;
        }
        .btn-outline-light:hover { background: rgba(6,182,212,0.1); box-shadow: 0 0 14px rgba(6,182,212,0.25); }

        /* Section Spacing */
        section { padding: 72px 0; }
        .section-tag {
            display: inline-block; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.5px;
            color: var(--accent-cyan); text-transform: uppercase; margin-bottom: 10px;
        }
        .section-title {
            font-size: 2rem; font-weight: 700; margin-bottom: 14px; color: var(--text-main);
            letter-spacing: -0.4px; line-height: 1.25;
        }
        .section-desc { font-size: 1rem; color: var(--text-soft); line-height: 1.6; margin-bottom: 40px; max-width: 680px; }

        /* Strategy Grid */
        .strategy-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; }
        .strategy-card {
            background: var(--bg-card); border-radius: var(--radius-md); padding: 32px 24px;
            border: 1px solid var(--border-subtle); transition: all 0.3s ease;
            position: relative; overflow: hidden;
        }
        .strategy-card:hover { border-color: var(--border-glow); box-shadow: var(--shadow-blue); transform: translateY(-4px); }
        .strategy-card .card-icon {
            font-size: 2.2rem; color: var(--accent-cyan); margin-bottom: 16px;
            display: inline-block; background: rgba(6,182,212,0.1); width: 52px; height: 52px;
            border-radius: 12px; text-align: center; line-height: 52px;
        }
        .strategy-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; color: var(--text-main); }
        .strategy-card p { font-size: 0.92rem; color: var(--text-soft); line-height: 1.6; }

        /* Weapon Banner */
        .weapon-banner {
            background: var(--bg-elevated); border-radius: var(--radius-lg); padding: 44px 40px;
            border: 1px solid var(--border-glow); position: relative; overflow: hidden;
            display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center;
        }
        .weapon-banner::before {
            content: ''; position: absolute; inset: 0;
            background-image: url('/assets/images/coverpic/cover-5.jpg');
            background-size: cover; background-position: center; opacity: 0.12;
        }
        .weapon-banner > * { position: relative; z-index: 1; }
        .weapon-list { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
        .weapon-tag {
            background: rgba(37,99,235,0.2); border: 1px solid var(--border-subtle);
            padding: 6px 14px; border-radius: 16px; font-size: 0.85rem; color: var(--text-label);
            font-weight: 500;
        }
        .weapon-img { border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-blue); }

        /* Steps */
        .steps-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
        .step-item {
            background: var(--bg-card); border-radius: var(--radius-md); padding: 28px 22px;
            border-left: 3px solid var(--accent-cyan); transition: all 0.3s;
        }
        .step-item:hover { border-left-color: #38BDF8; background: var(--bg-elevated); }
        .step-num {
            font-size: 2rem; font-weight: 800; color: var(--accent-cyan); line-height: 1; margin-bottom: 8px;
        }
        .step-item h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
        .step-item p { font-size: 0.9rem; color: var(--text-soft); }

        /* Tips List */
        .tips-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
        .tip-card {
            background: var(--bg-card); border-radius: var(--radius-md); padding: 26px;
            border: 1px solid var(--border-subtle); transition: all 0.3s;
        }
        .tip-card:hover { border-color: var(--accent-cyan); box-shadow: 0 0 14px rgba(6,182,212,0.2); }
        .tip-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
        .tip-card h4 i { color: var(--accent-cyan); }
        .tip-card p { font-size: 0.9rem; color: var(--text-soft); }

        /* FAQ */
        .faq-list { max-width: 800px; }
        .faq-item {
            background: var(--bg-card); border-radius: var(--radius-md); padding: 22px 26px;
            margin-bottom: 14px; border: 1px solid var(--border-subtle); transition: all 0.3s;
            cursor: pointer;
        }
        .faq-item:hover { border-color: var(--border-glow); }
        .faq-q { font-weight: 700; font-size: 1.05rem; color: var(--text-main); display: flex; justify-content: space-between; align-items: center; }
        .faq-a { margin-top: 10px; font-size: 0.92rem; color: var(--text-soft); line-height: 1.7; display: none; }
        .faq-item.open .faq-a { display: block; }

        /* CTA Strip */
        .cta-strip {
            background: linear-gradient(135deg, rgba(37,99,235,0.25), rgba(6,182,212,0.15));
            border-radius: var(--radius-lg); padding: 52px 36px; text-align: center;
            border: 1px solid var(--border-glow); position: relative; overflow: hidden;
        }
        .cta-strip::before {
            content: ''; position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-3.jpg');
            background-size: cover; background-position: center; opacity: 0.09;
        }
        .cta-strip > * { position: relative; z-index: 1; }
        .cta-strip h2 { font-size: 2rem; font-weight: 800; margin-bottom: 12px; }

        /* News List */
        .news-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
        .news-card {
            background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden;
            border: 1px solid var(--border-subtle); transition: all 0.3s;
        }
        .news-card:hover { border-color: var(--border-glow); box-shadow: var(--shadow-blue); transform: translateY(-3px); }
        .news-card img { width: 100%; height: 160px; object-fit: cover; }
        .news-body { padding: 18px 16px; }
        .news-body h4 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
        .news-body p { font-size: 0.85rem; color: var(--text-soft); line-height: 1.5; }
        .news-meta { font-size: 0.78rem; color: #60A5FA; margin-top: 8px; }

        /* Footer */
        .site-footer {
            background: var(--bg-card); border-top: 1px solid var(--border-subtle);
            padding: 54px 0 28px; margin-top: 20px;
        }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 32px; margin-bottom: 32px; }
        .footer-col h5 { font-size: 1rem; font-weight: 700; margin-bottom: 14px; color: var(--accent-cyan); }
        .footer-col a { display: block; font-size: 0.88rem; color: var(--text-soft); margin-bottom: 8px; transition: color 0.25s; }
        .footer-col a:hover { color: var(--text-main); }
        .footer-bottom { text-align: center; font-size: 0.82rem; color: var(--text-soft); padding-top: 22px; border-top: 1px solid var(--border-subtle); }

        /* Responsive */
        @media (max-width: 1024px) {
            .cat-hero h1 { font-size: 2.2rem; }
            .weapon-banner { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .mobile-toggle { display: block; }
            .nav-auth .btn-login, .nav-auth .btn-signup { padding: 6px 14px; font-size: 0.8rem; }
            .cat-hero { padding: 110px 0 60px; }
            .cat-hero h1 { font-size: 1.9rem; }
            .section-title { font-size: 1.6rem; }
            .strategy-grid { grid-template-columns: 1fr; }
            .weapon-banner { padding: 28px 20px; }
            .hero-cta-group { flex-direction: column; align-items: flex-start; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 14px; }
            .cat-hero h1 { font-size: 1.6rem; }
            .btn-primary, .btn-outline-light { width: 100%; justify-content: center; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

.show-mobile { display: flex !important; flex-direction: column; position: absolute; top: 68px; left: 0; width: 100%; background: rgba(3,7,18,0.96); backdrop-filter: blur(20px); padding: 20px 24px; gap: 16px; border-bottom: 1px solid var(--border-subtle); }

/* roulang page: category2 */
:root {
            --bg-deep: #030712;
            --bg-card: #0F172A;
            --bg-elevated: #1E293B;
            --accent-cyan: #06B6D4;
            --accent-blue: #2563EB;
            --accent-glow: rgba(6,182,212,0.45);
            --text-main: #F8FAFC;
            --text-soft: #94A3B8;
            --text-label: #60A5FA;
            --border-subtle: rgba(37,99,235,0.25);
            --border-glow: rgba(6,182,212,0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-cyan: 0 0 18px rgba(6,182,212,0.35);
            --shadow-blue: 0 4px 24px rgba(37,99,235,0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html { scroll-behavior: smooth; font-size: 16px; }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a { text-decoration: none; color: inherit; transition: color 0.25s ease; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font: inherit; }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: fixed;
            top: 0; left: 0; width: 100%;
            z-index: 1000;
            background: rgba(3,7,18,0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            font-size: 1.3rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-soft);
            position: relative;
            padding: 4px 0;
            transition: color 0.25s;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--text-main);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.25s ease;
        }
        .nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s;
        }
        .btn-login:hover {
            background: rgba(6,182,212,0.12);
            box-shadow: 0 0 12px rgba(6,182,212,0.25);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 9px 20px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            box-shadow: var(--shadow-cyan);
            transition: all 0.25s;
        }
        .btn-signup:hover {
            box-shadow: 0 0 22px rgba(6,182,212,0.6);
            transform: translateY(-1px);
        }
        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-main);
            font-size: 1.6rem;
            cursor: pointer;
        }
        .page-hero {
            padding: 130px 0 70px;
            background: radial-gradient(ellipse at 40% 30%, rgba(37,99,235,0.12), transparent 65%),
                        radial-gradient(ellipse at 60% 70%, rgba(6,182,212,0.06), transparent 65%);
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-5.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }
        .page-hero-tag {
            display: inline-block;
            background: rgba(6,182,212,0.15);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.4px;
            margin-bottom: 18px;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.18;
            letter-spacing: -0.5px;
            margin-bottom: 18px;
        }
        .page-hero-desc {
            font-size: 1.08rem;
            color: var(--text-soft);
            line-height: 1.65;
            margin-bottom: 28px;
        }
        .section {
            padding: 60px 0;
        }
        .section-label {
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--accent-cyan);
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 14px;
        }
        .section-desc {
            color: var(--text-soft);
            line-height: 1.6;
            margin-bottom: 36px;
            max-width: 700px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .card-glass {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .card-glass:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-cyan);
            transform: translateY(-2px);
        }
        .card-glass::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity 0.3s;
        }
        .card-glass:hover::before { opacity: 1; }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(6,182,212,0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }
        .card-glass h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .card-glass p {
            font-size: 0.95rem;
            color: var(--text-soft);
            line-height: 1.55;
        }
        .event-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .event-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-cyan);
        }
        .event-card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .event-badge {
            position: absolute;
            top: 12px;
            right: 12px;
            background: rgba(220, 38, 38, 0.9);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 14px;
            letter-spacing: 0.3px;
        }
        .event-card-body {
            padding: 18px;
        }
        .event-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .event-card-body .event-meta {
            font-size: 0.85rem;
            color: var(--text-label);
            margin-bottom: 10px;
        }
        .event-card-body p {
            font-size: 0.93rem;
            color: var(--text-soft);
            line-height: 1.5;
        }
        .progress-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            text-align: center;
            transition: all 0.3s;
        }
        .progress-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-blue);
        }
        .progress-ring {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            border: 6px solid var(--bg-elevated);
            border-top-color: var(--accent-cyan);
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--accent-cyan);
        }
        .progress-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .progress-card .progress-meta {
            font-size: 0.85rem;
            color: var(--text-soft);
        }
        .timeline {
            position: relative;
            padding-left: 30px;
            border-left: 2px solid var(--border-subtle);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 28px;
            padding-left: 20px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -36px;
            top: 4px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-cyan);
            box-shadow: 0 0 10px var(--accent-glow);
        }
        .timeline-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .timeline-item .timeline-date {
            font-size: 0.8rem;
            color: var(--text-label);
            margin-bottom: 6px;
        }
        .timeline-item p {
            font-size: 0.93rem;
            color: var(--text-soft);
        }
        .btn-cta {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            padding: 13px 30px;
            border-radius: 28px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: var(--shadow-cyan);
            transition: all 0.3s;
            cursor: pointer;
            border: none;
        }
        .btn-cta:hover {
            box-shadow: 0 0 26px rgba(6,182,212,0.55);
            transform: translateY(-2px);
        }
        .btn-outline {
            display: inline-block;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 11px 26px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.3s;
        }
        .btn-outline:hover {
            background: rgba(6,182,212,0.1);
            box-shadow: 0 0 16px rgba(6,182,212,0.25);
        }
        .leaderboard-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0 8px;
        }
        .leaderboard-table th {
            text-align: left;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-label);
            padding: 10px 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .leaderboard-table td {
            padding: 14px 12px;
            background: var(--bg-card);
            font-size: 0.95rem;
        }
        .leaderboard-table tr td:first-child {
            border-radius: var(--radius-sm) 0 0 var(--radius-sm);
            font-weight: 700;
            color: var(--accent-cyan);
        }
        .leaderboard-table tr td:last-child {
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }
        .leaderboard-table tr {
            transition: all 0.25s;
        }
        .leaderboard-table tbody tr:hover td {
            background: var(--bg-elevated);
        }
        .faq-list {
            max-width: 800px;
        }
        .faq-item {
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin-bottom: 14px;
            background: var(--bg-card);
            transition: all 0.25s;
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .faq-item p {
            color: var(--text-soft);
            font-size: 0.95rem;
            line-height: 1.55;
        }
        .news-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s;
        }
        .news-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-cyan);
        }
        .news-card-img {
            height: 160px;
            background-size: cover;
            background-position: center;
        }
        .news-card-body {
            padding: 16px;
        }
        .news-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .news-card-body p {
            font-size: 0.88rem;
            color: var(--text-soft);
            line-height: 1.5;
        }
        .cta-strip {
            background: linear-gradient(135deg, rgba(37,99,235,0.18), rgba(6,182,212,0.1));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 48px 36px;
            text-align: center;
        }
        .cta-strip h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-strip p {
            color: var(--text-soft);
            margin-bottom: 28px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 36px;
        }
        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-main);
        }
        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: var(--text-soft);
            margin-bottom: 8px;
            transition: color 0.25s;
        }
        .footer-col a:hover {
            color: var(--accent-cyan);
        }
        .footer-col i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.85rem;
            color: var(--text-soft);
            line-height: 1.6;
        }
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 90px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(15,23,42,0.9);
            backdrop-filter: blur(12px);
            border: 2px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(6,182,212,0.35);
            cursor: pointer;
            transition: all 0.3s;
            animation: fab-breathe 3s ease-in-out infinite;
        }
        .fab-left:hover {
            box-shadow: 0 0 28px rgba(6,182,212,0.55);
            transform: scale(1.08);
            animation: none;
        }
        @keyframes fab-breathe {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }
        @media (max-width: 1024px) {
            .grid-3, .news-list { grid-template-columns: repeat(2, 1fr); }
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .mobile-toggle { display: block; }
            .nav-auth { gap: 8px; }
            .btn-login { padding: 6px 14px; font-size: 0.82rem; }
            .btn-signup { padding: 7px 16px; font-size: 0.82rem; }
            .nav-logo { font-size: 1.1rem; }
            .page-hero { padding: 110px 0 50px; }
            .page-hero h1 { font-size: 2rem; }
            .grid-2, .grid-3, .grid-4, .news-list { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .section-title { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-hero h1 { font-size: 1.7rem; }
            .section-title { font-size: 1.4rem; }
            .footer-grid { grid-template-columns: 1fr; }
            .cta-strip { padding: 32px 20px; }
            .cta-strip h2 { font-size: 1.5rem; }
            .fab-left { width: 48px; height: 48px; left: 14px; bottom: 70px; font-size: 1.3rem; }
        }

/* roulang page: category3 */
:root {
            --bg-deep: #030712;
            --bg-card: #0F172A;
            --bg-elevated: #1E293B;
            --accent-cyan: #06B6D4;
            --accent-blue: #2563EB;
            --accent-glow: rgba(6,182,212,0.45);
            --text-main: #F8FAFC;
            --text-soft: #94A3B8;
            --text-label: #60A5FA;
            --border-subtle: rgba(37,99,235,0.25);
            --border-glow: rgba(6,182,212,0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-cyan: 0 0 18px rgba(6,182,212,0.35);
            --shadow-blue: 0 4px 24px rgba(37,99,235,0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html { scroll-behavior: smooth; font-size: 16px; }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a { text-decoration: none; color: inherit; transition: color 0.25s ease; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font: inherit; }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0; left: 0; width: 100%;
            z-index: 1000;
            background: rgba(3,7,18,0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            font-size: 1.3rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-soft);
            position: relative;
            padding: 4px 0;
            transition: color 0.25s;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--text-main);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.25s ease;
        }
        .nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s;
        }
        .btn-login:hover {
            background: rgba(6,182,212,0.12);
            box-shadow: 0 0 12px rgba(6,182,212,0.25);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 9px 20px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            box-shadow: var(--shadow-cyan);
            transition: all 0.25s;
        }
        .btn-signup:hover {
            box-shadow: 0 0 22px rgba(6,182,212,0.6);
            transform: translateY(-1px);
        }
        .mobile-toggle { display: none; background: transparent; border: none; color: var(--text-main); font-size: 1.6rem; cursor: pointer; }

        /* Category Page Hero */
        .cat-hero {
            padding: 130px 0 70px;
            background: radial-gradient(ellipse at 20% 30%, rgba(6,182,212,0.12), transparent 70%),
                        radial-gradient(ellipse at 80% 60%, rgba(37,99,235,0.1), transparent 70%);
            position: relative;
            overflow: hidden;
        }
        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-5.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.14;
            mix-blend-mode: overlay;
        }
        .cat-hero-content {
            position: relative;
            z-index: 1;
            max-width: 820px;
        }
        .cat-hero-tag {
            display: inline-block;
            background: rgba(6,182,212,0.12);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .cat-hero h1 {
            font-size: 2.7rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.4px;
            margin-bottom: 18px;
            background: linear-gradient(135deg, #F8FAFC 0%, #E2E8F0 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cat-hero-desc {
            font-size: 1.05rem;
            color: var(--text-soft);
            line-height: 1.7;
            margin-bottom: 28px;
        }

        /* Sections */
        .section { padding: 60px 0; }
        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.6px;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
            color: var(--text-main);
        }
        .section p.lead {
            font-size: 1.02rem;
            color: var(--text-soft);
            line-height: 1.65;
            margin-bottom: 32px;
        }

        /* Event Timeline */
        .event-timeline { display: flex; flex-direction: column; gap: 24px; }
        .event-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 30px;
            display: flex;
            gap: 28px;
            align-items: flex-start;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .event-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
            border-radius: 4px 0 0 4px;
        }
        .event-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 18px rgba(6,182,212,0.12);
            transform: translateY(-2px);
        }
        .event-icon {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            background: rgba(6,182,212,0.1);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-cyan);
        }
        .event-info h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .event-meta {
            font-size: 0.85rem;
            color: var(--text-label);
            margin-bottom: 10px;
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .event-meta span { display: flex; align-items: center; gap: 5px; }
        .event-info p {
            font-size: 0.95rem;
            color: var(--text-soft);
            line-height: 1.6;
        }
        .event-badge {
            display: inline-block;
            background: linear-gradient(135deg, #DC2626, #EF4444);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 10px;
            letter-spacing: 0.3px;
            margin-left: 10px;
            vertical-align: middle;
        }

        /* Feature Grid */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .feature-item {
            background: var(--bg-elevated);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all 0.25s;
            text-align: left;
        }
        .feature-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-blue);
            transform: translateY(-3px);
        }
        .feature-item i {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
            display: block;
        }
        .feature-item h4 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-item p {
            font-size: 0.93rem;
            color: var(--text-soft);
            line-height: 1.6;
        }

        /* Leaderboard / Ranking */
        .ranking-table-wrap {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }
        .ranking-header {
            background: var(--bg-elevated);
            padding: 16px 24px;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-label);
            display: grid;
            grid-template-columns: 60px 1fr 120px 100px;
            gap: 12px;
            align-items: center;
            border-bottom: 1px solid var(--border-subtle);
        }
        .ranking-row {
            display: grid;
            grid-template-columns: 60px 1fr 120px 100px;
            gap: 12px;
            padding: 14px 24px;
            align-items: center;
            border-bottom: 1px solid rgba(37,99,235,0.08);
            transition: background 0.2s;
        }
        .ranking-row:hover { background: rgba(6,182,212,0.05); }
        .rank-num {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.9rem;
            background: var(--bg-elevated);
            color: var(--text-soft);
        }
        .rank-num.top1 { background: linear-gradient(135deg, #F59E0B, #FCD34D); color: #030712; }
        .rank-num.top2 { background: linear-gradient(135deg, #94A3B8, #CBD5E1); color: #030712; }
        .rank-num.top3 { background: linear-gradient(135deg, #B45309, #D97706); color: #fff; }
        .player-name { font-weight: 600; color: var(--text-main); }
        .player-score { color: var(--accent-cyan); font-weight: 700; }
        .player-prize { color: var(--text-soft); font-size: 0.88rem; }

        /* Prize Pool */
        .prize-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        .prize-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: left;
            transition: all 0.25s;
        }
        .prize-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 16px rgba(6,182,212,0.15);
        }
        .prize-card h5 {
            font-size: 0.85rem;
            color: var(--text-label);
            text-transform: uppercase;
            letter-spacing: 0.4px;
            margin-bottom: 6px;
        }
        .prize-card .amount {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-cyan);
            margin-bottom: 4px;
        }
        .prize-card p {
            font-size: 0.9rem;
            color: var(--text-soft);
        }

        /* News Section */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.25s;
        }
        .news-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 16px rgba(6,182,212,0.12);
            transform: translateY(-2px);
        }
        .news-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .news-card-body { padding: 18px 16px; }
        .news-card-body .cat-tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.4px;
            margin-bottom: 6px;
        }
        .news-card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .news-card-body p {
            font-size: 0.88rem;
            color: var(--text-soft);
            margin-bottom: 10px;
            line-height: 1.5;
        }
        .news-card-body .time {
            font-size: 0.78rem;
            color: var(--text-label);
        }

        /* CTA Banner */
        .cta-banner {
            background: linear-gradient(135deg, rgba(37,99,235,0.2), rgba(6,182,212,0.15));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: left;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(6,182,212,0.25), transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-banner h3 {
            font-size: 1.7rem;
            font-weight: 800;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            font-size: 1rem;
            color: var(--text-soft);
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-primary {
            position: relative;
            z-index: 1;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8);
            border: none;
            color: #030712;
            font-weight: 700;
            padding: 12px 28px;
            border-radius: 24px;
            font-size: 0.95rem;
            cursor: pointer;
            box-shadow: 0 0 14px rgba(6,182,212,0.3);
            transition: all 0.25s;
            display: inline-block;
        }
        .btn-primary:hover { box-shadow: 0 0 24px rgba(6,182,212,0.55); transform: translateY(-2px); }

        /* Footer */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 28px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 30px;
            margin-bottom: 32px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-soft);
            padding: 4px 0;
            transition: color 0.25s;
        }
        .footer-col a:hover { color: var(--accent-cyan); }
        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 18px;
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-soft);
        }

        /* FAB */
        .floating-fab {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 50;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: rgba(15,23,42,0.85);
            backdrop-filter: blur(12px);
            border: 2px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(6,182,212,0.35);
            transition: all 0.3s;
        }
        .floating-fab:hover {
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(6,182,212,0.55);
            background: rgba(6,182,212,0.12);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .cat-hero h1 { font-size: 2.1rem; }
            .section h2 { font-size: 1.7rem; }
            .event-card { flex-direction: column; gap: 14px; padding: 22px 20px; }
            .ranking-header, .ranking-row { grid-template-columns: 50px 1fr 90px 80px; font-size: 0.82rem; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; position: absolute; top: 68px; left: 0; width: 100%; background: rgba(3,7,18,0.98); flex-direction: column; padding: 18px 24px; gap: 12px; border-bottom: 1px solid var(--border-subtle); }
            .nav-links.show { display: flex; }
            .mobile-toggle { display: block; }
            .cat-hero { padding: 110px 0 50px; }
            .cat-hero h1 { font-size: 1.75rem; }
            .feature-grid { grid-template-columns: 1fr; }
            .prize-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .ranking-header, .ranking-row { grid-template-columns: 40px 1fr 70px 60px; gap: 6px; padding: 10px 12px; font-size: 0.78rem; }
            .cta-banner { padding: 32px 20px; }
            .cta-banner h3 { font-size: 1.3rem; }
            .floating-fab { left: 12px; bottom: 80px; width: 44px; height: 44px; font-size: 1.2rem; }
        }
        @media (max-width: 520px) {
            .nav-logo { font-size: 1.05rem; }
            .btn-login, .btn-signup { padding: 6px 13px; font-size: 0.78rem; }
            .cat-hero h1 { font-size: 1.45rem; }
            .section h2 { font-size: 1.35rem; }
            .event-card { padding: 18px 16px; }
            .ranking-header, .ranking-row { grid-template-columns: 32px 1fr 60px 55px; font-size: 0.7rem; padding: 8px 10px; }
        }

/* roulang page: category4 */
:root {
            --bg-deep: #030712;
            --bg-card: #0F172A;
            --bg-elevated: #1E293B;
            --accent-cyan: #06B6D4;
            --accent-blue: #2563EB;
            --accent-glow: rgba(6,182,212,0.45);
            --text-main: #F8FAFC;
            --text-soft: #94A3B8;
            --text-label: #60A5FA;
            --border-subtle: rgba(37,99,235,0.25);
            --border-glow: rgba(6,182,212,0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-cyan: 0 0 18px rgba(6,182,212,0.35);
            --shadow-blue: 0 4px 24px rgba(37,99,235,0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, border-color 0.25s ease;
        }

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

        button,
        input,
        select,
        textarea {
            font: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(3, 7, 18, 0.92);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }

        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 16px;
        }

        .nav-logo {
            font-size: 1.3rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), #38BDF8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-soft);
            position: relative;
            padding: 4px 0;
            transition: color 0.25s;
            white-space: nowrap;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-main);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.25s ease;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

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

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 8px 20px;
            border-radius: 22px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s;
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(6, 182, 212, 0.12);
            box-shadow: 0 0 14px rgba(6, 182, 212, 0.3);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 9px 22px;
            border-radius: 22px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            box-shadow: var(--shadow-cyan);
            transition: all 0.25s;
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 0 24px rgba(6, 182, 212, 0.65);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-main);
            font-size: 1.8rem;
            cursor: pointer;
            padding: 6px;
            line-height: 1;
        }

        /* Hero Banner */
        .page-hero {
            padding: 130px 0 80px;
            background: radial-gradient(ellipse at 20% 30%, rgba(37, 99, 235, 0.2), transparent 65%),
                radial-gradient(ellipse at 80% 70%, rgba(6, 182, 212, 0.1), transparent 65%);
            position: relative;
            overflow: hidden;
            text-align: left;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-5.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            mix-blend-mode: overlay;
            z-index: 0;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-soft);
            font-size: 0.9rem;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-label);
            transition: color 0.2s;
        }

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

        .breadcrumb i {
            font-size: 0.7rem;
            opacity: 0.7;
        }

        .hero-tag {
            display: inline-block;
            background: rgba(6, 182, 212, 0.18);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 6px 18px;
            border-radius: 22px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 22px;
        }

        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 18px;
            background: linear-gradient(135deg, #F8FAFC 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-align: left;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-soft);
            line-height: 1.7;
            margin-bottom: 30px;
            max-width: 680px;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .hero-stat-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .hero-stat-item i {
            font-size: 2rem;
            color: var(--accent-cyan);
            opacity: 0.9;
        }

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

        .hero-stat-item strong {
            font-size: 1.5rem;
            font-weight: 700;
            color: #F8FAFC;
            line-height: 1.2;
        }

        .hero-stat-item span {
            font-size: 0.85rem;
            color: var(--text-soft);
        }

        /* Section Spacing */
        .section {
            padding: 75px 0;
        }

        .section-sm {
            padding: 55px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 18px;
            line-height: 1.25;
            color: var(--text-main);
            text-align: left;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-soft);
            margin-bottom: 40px;
            line-height: 1.65;
            max-width: 720px;
        }

        /* Promo Cards Grid */
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 28px;
            margin-top: 20px;
        }

        .promo-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 30px 28px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .promo-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity 0.3s;
        }

        .promo-card:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-blue);
        }

        .promo-card:hover::before {
            opacity: 1;
        }

        .promo-icon {
            width: 52px;
            height: 52px;
            background: rgba(6, 182, 212, 0.15);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-cyan);
        }

        .promo-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
        }

        .promo-card p {
            font-size: 0.95rem;
            color: var(--text-soft);
            line-height: 1.6;
        }

        .promo-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(234, 88, 12, 0.15);
            color: #F97316;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 20px;
            width: fit-content;
            letter-spacing: 0.3px;
        }

        .promo-badge.gold {
            background: rgba(245, 158, 11, 0.2);
            color: #FBBF24;
        }

        /* Payment Channels */
        .payment-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .payment-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px 18px;
            text-align: center;
            transition: all 0.25s;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }

        .payment-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(6, 182, 212, 0.2);
            transform: translateY(-2px);
        }

        .payment-card i {
            font-size: 2.2rem;
            color: var(--accent-cyan);
        }

        .payment-card span {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-main);
        }

        .payment-card small {
            font-size: 0.8rem;
            color: var(--text-soft);
        }

        /* Step Timeline */
        .step-list {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 30px;
        }

        .step-item {
            flex: 1 1 220px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            position: relative;
            transition: all 0.25s;
        }

        .step-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan);
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 16px;
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.5;
        }

        /* Info Banner */
        .info-banner {
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(6, 182, 212, 0.08));
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-top: 30px;
        }

        .info-banner i {
            font-size: 2.8rem;
            color: var(--accent-cyan);
            opacity: 0.9;
        }

        .info-banner-content {
            flex: 1;
            min-width: 240px;
        }

        .info-banner h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .info-banner p {
            color: var(--text-soft);
            font-size: 0.95rem;
        }

        /* CTA Block */
        .cta-block {
            background: var(--bg-elevated);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 48px 36px;
            text-align: center;
            margin-top: 20px;
            position: relative;
            overflow: hidden;
        }

        .cta-block::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 50% 0%, rgba(6, 182, 212, 0.08), transparent 70%);
            pointer-events: none;
        }

        .cta-block h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-block p {
            color: var(--text-soft);
            font-size: 1.05rem;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .cta-btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn-cta-primary {
            background: linear-gradient(135deg, #F59E0B, #F97316);
            border: none;
            color: #030712;
            padding: 14px 32px;
            border-radius: 28px;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-cta-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 28px rgba(245, 158, 11, 0.6);
        }

        .btn-cta-outline {
            background: transparent;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 14px 32px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            transition: all 0.3s;
        }

        .btn-cta-outline:hover {
            background: rgba(6, 182, 212, 0.12);
            box-shadow: 0 0 18px rgba(6, 182, 212, 0.3);
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 24px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 22px 26px;
            transition: all 0.25s;
            cursor: pointer;
        }

        .faq-item:hover {
            border-color: var(--accent-cyan);
        }

        .faq-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .faq-item h4 i {
            color: var(--accent-cyan);
            font-size: 1rem;
        }

        .faq-item p {
            font-size: 0.92rem;
            color: var(--text-soft);
            line-height: 1.6;
        }

        /* Content List (CMS) */
        .content-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
            gap: 24px;
            margin-top: 24px;
        }

        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan);
            transform: translateY(-3px);
        }

        .content-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-subtle);
        }

        .content-card-body {
            padding: 20px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .content-card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.4;
        }

        .content-card-body p {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.5;
            flex: 1;
        }

        .content-card-body .meta {
            font-size: 0.8rem;
            color: var(--text-soft);
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 6px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-subtle);
            padding: 60px 0 30px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 36px;
            margin-bottom: 40px;
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-main);
        }

        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: var(--text-soft);
            margin-bottom: 10px;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.85rem;
            color: var(--text-soft);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .promo-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(3, 7, 18, 0.98);
                backdrop-filter: blur(20px);
                padding: 20px 24px;
                gap: 16px;
                border-bottom: 1px solid var(--border-subtle);
            }
            .nav-links.open {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .page-hero h1 {
                font-size: 1.9rem;
            }
            .hero-stats {
                gap: 20px;
            }
            .promo-grid {
                grid-template-columns: 1fr;
            }
            .payment-grid {
                grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
            }
            .info-banner {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-logo {
                font-size: 1.1rem;
            }
            .btn-login,
            .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .cta-btn-group {
                flex-direction: column;
                align-items: center;
            }
        }