/* roulang page: index */
:root {
            --primary-bg: #07070D;
            --secondary-bg: #0E0E1E;
            --accent-lime: #A3E635;
            --accent-cyan: #06B6D4;
            --text-white: #FFFFFF;
            --text-silver: #94A3B8;
            --text-pink: #F43F5E;
            --card-bg: rgba(14, 14, 30, 0.8);
            --card-border: rgba(163, 230, 53, 0.15);
            --glow-lime: 0 0 20px rgba(163, 230, 53, 0.35);
            --glow-cyan: 0 0 25px rgba(6, 182, 212, 0.4);
            --radius-lg: 1.5rem;
            --radius-md: 1rem;
            --radius-sm: 0.75rem;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: 'Be Vietnam Pro', sans-serif;
            background-color: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(7, 7, 13, 0.85);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(163, 230, 53, 0.1);
            transition: var(--transition-base);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            letter-spacing: -0.5px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition-base);
            position: relative;
        }

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

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-lime);
            box-shadow: var(--glow-lime);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 10px 24px;
            border-radius: 2rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(6, 182, 212, 0.1);
            box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border: none;
            color: var(--primary-bg);
            padding: 10px 24px;
            border-radius: 2rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(163, 230, 53, 0.4);
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(163, 230, 53, 0.6);
            transform: translateY(-1px);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            padding: 130px 0 80px;
            background: radial-gradient(circle at 30% 50%, rgba(6, 182, 212, 0.08) 0%, transparent 70%);
            border-bottom: 1px solid rgba(163, 230, 53, 0.08);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
            background: linear-gradient(to right, #fff, #A3E635);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-content p {
            font-size: 1.1rem;
            color: var(--text-silver);
            margin-bottom: 40px;
            max-width: 520px;
        }

        .invite-progress {
            background: rgba(14, 14, 30, 0.7);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 28px;
            margin-top: 20px;
        }

        .progress-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 16px;
            font-weight: 600;
        }

        .progress-bar {
            height: 10px;
            background: #1e1e2e;
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 24px;
        }

        .progress-fill {
            width: 65%;
            height: 100%;
            background: linear-gradient(90deg, var(--accent-lime), var(--accent-cyan));
            border-radius: 10px;
            box-shadow: var(--glow-lime);
        }

        .invite-btn {
            background: var(--accent-lime);
            color: #000;
            border: none;
            padding: 14px 32px;
            font-weight: 700;
            border-radius: 2.5rem;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 1rem;
        }

        .invite-btn:hover {
            background: #bef264;
            box-shadow: var(--glow-lime);
            transform: scale(1.02);
        }

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

        .hero-visual img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: 0 25px 50px -12px rgba(163, 230, 53, 0.15);
        }

        /* Section Styles */
        .section {
            padding: 90px 0;
        }

        .section-header {
            margin-bottom: 60px;
        }

        .section-header h2 {
            font-size: 2.4rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .section-header p {
            color: var(--text-silver);
            font-size: 1.1rem;
            max-width: 700px;
        }

        /* Metrics Dashboard */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .metric-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: var(--transition-base);
            backdrop-filter: blur(8px);
        }

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

        .metric-value {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-lime);
        }

        .metric-label {
            color: var(--text-silver);
            margin-top: 8px;
        }

        /* Service Matrix */
        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 40px 28px;
            transition: var(--transition-base);
            position: relative;
        }

        .service-card:hover {
            border-color: var(--accent-lime);
            box-shadow: var(--glow-lime);
        }

        .service-icon {
            font-size: 2.2rem;
            color: var(--accent-cyan);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.4rem;
            margin-bottom: 12px;
        }

        .service-card p {
            color: var(--text-silver);
        }

        /* Comparison Table */
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: rgba(14, 14, 30, 0.5);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .compare-table th {
            text-align: left;
            padding: 20px;
            background: rgba(163, 230, 53, 0.05);
            color: var(--accent-lime);
            font-weight: 600;
        }

        .compare-table td {
            padding: 18px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-silver);
        }

        /* Coupon Wall */
        .coupon-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .coupon-card {
            background: linear-gradient(145deg, #1C0738, #120324);
            border: 1px solid #EC4899;
            border-radius: var(--radius-lg);
            padding: 32px 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .coupon-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(236, 72, 153, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .coupon-value {
            font-size: 2.8rem;
            font-weight: 800;
            color: #FACC15;
        }

        .coupon-condition {
            color: #F472B6;
            margin: 12px 0 20px;
        }

        .btn-coupon {
            background: #EC4899;
            color: white;
            border: none;
            padding: 10px 28px;
            border-radius: 2rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .btn-coupon:hover {
            background: #F472B6;
            box-shadow: 0 0 25px rgba(236, 72, 153, 0.5);
        }

        /* News List */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .news-item {
            display: flex;
            gap: 20px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: var(--transition-base);
        }

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

        .news-thumb {
            width: 120px;
            height: 90px;
            border-radius: var(--radius-sm);
            object-fit: cover;
        }

        .news-content h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }

        .news-content a {
            color: white;
            text-decoration: none;
        }

        .news-excerpt {
            color: var(--text-silver);
            font-size: 0.9rem;
        }

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

        /* FAB */
        .fab {
            position: fixed;
            left: 24px;
            bottom: 96px;
            width: 56px;
            height: 56px;
            background: rgba(7, 7, 13, 0.8);
            backdrop-filter: blur(12px);
            border: 2px solid #A3E635;
            border-radius: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #A3E635;
            font-size: 1.5rem;
            cursor: pointer;
            z-index: 999;
            box-shadow: 0 0 25px rgba(163, 230, 53, 0.35);
            transition: var(--transition-base);
            animation: float 3s infinite alternate;
        }

        .fab:hover {
            transform: scale(1.1);
            box-shadow: 0 0 35px rgba(163, 230, 53, 0.55);
        }

        @keyframes float {
            0% { transform: translateY(0); }
            100% { transform: translateY(-6px); }
        }

        /* Footer */
        .footer {
            background: #09090B;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 60px 0 30px;
            margin-top: 40px;
        }

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

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent-lime);
        }

        .footer-links h4 {
            color: white;
            margin-bottom: 16px;
        }

        .footer-links a {
            display: block;
            color: var(--text-silver);
            text-decoration: none;
            margin-bottom: 10px;
            transition: var(--transition-base);
        }

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

        .copyright {
            text-align: center;
            color: var(--text-silver);
            font-size: 0.9rem;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; }
            .metrics-grid { grid-template-columns: repeat(2, 1fr); }
            .matrix-grid { grid-template-columns: 1fr 1fr; }
            .coupon-grid { grid-template-columns: 1fr 1fr; }
            .news-layout { grid-template-columns: 1fr; }
        }

        @media (max-width: 768px) {
            .nav-links { display: none; }
            .mobile-menu-toggle { display: block; }
            .hero-content h1 { font-size: 2.2rem; }
            .metrics-grid { grid-template-columns: 1fr; }
            .matrix-grid { grid-template-columns: 1fr; }
            .coupon-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .nav-actions { gap: 8px; }
        }

/* roulang page: article */
:root {
            --primary-bg: #07070D;
            --secondary-bg: #0E0E1E;
            --accent-lime: #A3E635;
            --accent-cyan: #06B6D4;
            --text-white: #FFFFFF;
            --text-silver: #94A3B8;
            --text-pink: #F43F5E;
            --card-bg: rgba(14, 14, 30, 0.8);
            --card-border: rgba(163, 230, 53, 0.15);
            --glow-lime: 0 0 20px rgba(163, 230, 53, 0.35);
            --glow-cyan: 0 0 25px rgba(6, 182, 212, 0.4);
            --radius-lg: 1.5rem;
            --radius-md: 1rem;
            --radius-sm: 0.75rem;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: 'Be Vietnam Pro', sans-serif;
            background-color: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

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

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(7, 7, 13, 0.85);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(163, 230, 53, 0.1);
            transition: var(--transition-base);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            letter-spacing: -0.5px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition-base);
            position: relative;
            white-space: nowrap;
        }

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

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-lime);
            box-shadow: var(--glow-lime);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 10px 24px;
            border-radius: 2rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 0.9rem;
            white-space: nowrap;
            font-family: inherit;
        }

        .btn-login:hover {
            background: rgba(6, 182, 212, 0.1);
            box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border: none;
            color: var(--primary-bg);
            padding: 10px 24px;
            border-radius: 2rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(163, 230, 53, 0.4);
            font-size: 0.9rem;
            white-space: nowrap;
            font-family: inherit;
        }

        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(163, 230, 53, 0.6);
            transform: translateY(-1px);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Article Page Specific */
        .article-page {
            padding: 140px 0 80px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        .article-main {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 40px;
            backdrop-filter: blur(8px);
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .article-category-badge {
            background: rgba(163, 230, 53, 0.12);
            color: var(--accent-lime);
            padding: 6px 16px;
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 600;
            border: 1px solid rgba(163, 230, 53, 0.25);
        }

        .article-date {
            color: var(--text-silver);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-date i {
            font-size: 0.85rem;
            color: var(--accent-cyan);
        }

        .article-main h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            background: linear-gradient(to right, var(--text-white), var(--accent-lime));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-featured-image {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: 32px;
            box-shadow: 0 12px 30px rgba(0,0,0,0.5);
        }

        .article-body {
            color: var(--text-silver);
            font-size: 1.05rem;
            line-height: 1.75;
        }

        .article-body h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 32px 0 16px;
            padding-bottom: 8px;
            border-bottom: 1px solid rgba(163, 230, 53, 0.15);
        }

        .article-body h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--accent-lime);
            margin: 24px 0 12px;
        }

        .article-body p {
            margin-bottom: 16px;
        }

        .article-body ul,
        .article-body ol {
            margin: 16px 0 24px 24px;
            color: var(--text-silver);
        }

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

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

        .article-body a {
            color: var(--accent-cyan);
            font-weight: 500;
            text-decoration: underline;
            transition: var(--transition-base);
        }

        .article-body a:hover {
            color: var(--accent-lime);
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent-lime);
            background: rgba(163, 230, 53, 0.05);
            padding: 20px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-white);
            font-style: italic;
        }

        .article-not-found {
            text-align: left;
            padding: 80px 0;
        }

        .article-not-found h2 {
            font-size: 2rem;
            margin-bottom: 16px;
        }

        .article-not-found p {
            color: var(--text-silver);
            margin-bottom: 24px;
        }

        .back-home-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-lime);
            color: var(--primary-bg);
            padding: 12px 28px;
            border-radius: 2rem;
            font-weight: 700;
            transition: var(--transition-base);
        }

        .back-home-link:hover {
            box-shadow: var(--glow-lime);
            transform: translateY(-2px);
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
            position: sticky;
            top: 100px;
        }

        .sidebar-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 24px;
            backdrop-filter: blur(8px);
        }

        .sidebar-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--accent-lime);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .sidebar-card ul li a {
            color: var(--text-silver);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }

        .sidebar-card ul li a:hover {
            color: var(--accent-lime);
            padding-left: 6px;
        }

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

        .cta-sidebar {
            background: linear-gradient(135deg, rgba(163, 230, 53, 0.08), rgba(6, 182, 212, 0.12));
            border: 1px solid rgba(163, 230, 53, 0.25);
            text-align: center;
        }

        .cta-sidebar p {
            color: var(--text-silver);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        .cta-sidebar .btn-signup {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 24px;
        }

        /* Article Author / Share */
        .article-footer-meta {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(163, 230, 53, 0.1);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .share-buttons {
            display: flex;
            gap: 12px;
        }

        .share-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.05);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-silver);
            font-size: 1rem;
            transition: var(--transition-base);
        }

        .share-btn:hover {
            background: var(--accent-lime);
            color: var(--primary-bg);
            box-shadow: var(--glow-lime);
        }

        /* Related Articles Section */
        .related-section {
            padding: 80px 0;
            background: rgba(14, 14, 30, 0.4);
            border-top: 1px solid rgba(163, 230, 53, 0.08);
            border-bottom: 1px solid rgba(163, 230, 53, 0.08);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .related-card:hover {
            border-color: var(--accent-lime);
            box-shadow: 0 0 20px rgba(163, 230, 53, 0.1);
            transform: translateY(-2px);
        }

        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .related-card-body {
            padding: 20px;
        }

        .related-card-body h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .related-card-body h5 a {
            color: var(--text-white);
            transition: var(--transition-base);
        }

        .related-card-body h5 a:hover {
            color: var(--accent-lime);
        }

        .related-card-body .article-date {
            font-size: 0.8rem;
        }

        /* Promotion Banner */
        .promo-banner {
            background: linear-gradient(135deg, rgba(163, 230, 53, 0.1), rgba(6, 182, 212, 0.15));
            border: 1px solid rgba(163, 230, 53, 0.3);
            border-radius: var(--radius-lg);
            padding: 48px;
            margin: 60px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 32px;
            flex-wrap: wrap;
        }

        .promo-text h3 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .promo-text p {
            color: var(--text-silver);
            font-size: 1.05rem;
            max-width: 500px;
        }

        /* FAB */
        .fab-container {
            position: fixed;
            left: 24px;
            bottom: 100px;
            z-index: 50;
        }

        .fab {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(7, 7, 13, 0.8);
            backdrop-filter: blur(12px);
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.45);
            animation: fabPulse 2s infinite;
        }

        .fab:hover {
            transform: scale(1.1);
            box-shadow: 0 0 35px rgba(6, 182, 212, 0.7);
            color: var(--accent-lime);
            border-color: var(--accent-lime);
        }

        @keyframes fabPulse {
            0% { box-shadow: 0 0 15px rgba(6, 182, 212, 0.3); }
            50% { box-shadow: 0 0 25px rgba(6, 182, 212, 0.6); }
            100% { box-shadow: 0 0 15px rgba(6, 182, 212, 0.3); }
        }

        .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: var(--text-pink);
            border-radius: 50%;
            border: 2px solid var(--primary-bg);
            animation: blink 1.5s infinite;
        }

        @keyframes blink {
            0% { opacity: 1; }
            50% { opacity: 0.3; }
            100% { opacity: 1; }
        }

        /* Footer */
        .footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(163, 230, 53, 0.1);
            padding: 60px 0 40px;
        }

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

        .footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
        }

        .footer-links h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--accent-lime);
        }

        .footer-links a {
            display: block;
            color: var(--text-silver);
            font-size: 0.9rem;
            margin-bottom: 12px;
            transition: var(--transition-base);
        }

        .footer-links a:hover {
            color: var(--accent-lime);
            padding-left: 4px;
        }

        .copyright {
            text-align: center;
            color: var(--text-silver);
            font-size: 0.85rem;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
            }

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

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

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(7, 7, 13, 0.98);
                padding: 24px;
                border-bottom: 1px solid var(--card-border);
                gap: 16px;
            }

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

            .mobile-menu-toggle {
                display: block;
            }

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

            .article-main {
                padding: 24px;
            }

            .article-main h1 {
                font-size: 2rem;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

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

            .promo-banner {
                flex-direction: column;
                text-align: center;
            }

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

/* roulang page: category1 */
:root {
            --primary-bg: #07070D;
            --secondary-bg: #0E0E1E;
            --accent-lime: #A3E635;
            --accent-cyan: #06B6D4;
            --text-white: #FFFFFF;
            --text-silver: #94A3B8;
            --text-pink: #F43F5E;
            --card-bg: rgba(14, 14, 30, 0.8);
            --card-border: rgba(163, 230, 53, 0.15);
            --glow-lime: 0 0 20px rgba(163, 230, 53, 0.35);
            --glow-cyan: 0 0 25px rgba(6, 182, 212, 0.4);
            --radius-lg: 1.5rem;
            --radius-md: 1rem;
            --radius-sm: 0.75rem;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: 'Be Vietnam Pro', sans-serif;
            background-color: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

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

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(7, 7, 13, 0.85);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(163, 230, 53, 0.1);
            transition: var(--transition-base);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            letter-spacing: -0.5px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition-base);
            position: relative;
        }

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

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-lime);
            box-shadow: var(--glow-lime);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 10px 24px;
            border-radius: 2rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(6, 182, 212, 0.1);
            box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border: none;
            color: var(--primary-bg);
            padding: 10px 24px;
            border-radius: 2rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(163, 230, 53, 0.4);
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(163, 230, 53, 0.6);
            transform: translateY(-1px);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            padding: 130px 0 80px;
            background: radial-gradient(circle at 30% 50%, rgba(6, 182, 212, 0.08) 0%, transparent 70%);
            border-bottom: 1px solid rgba(163, 230, 53, 0.08);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
            background: linear-gradient(to right, #fff, #A3E635);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content p {
            font-size: 1.1rem;
            color: var(--text-silver);
            margin-bottom: 40px;
            max-width: 520px;
        }

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

        .hero-visual img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: 0 25px 50px -12px rgba(163, 230, 53, 0.15);
        }

        /* Section Styles */
        .section {
            padding: 90px 0;
        }

        .section-header {
            margin-bottom: 60px;
        }

        .section-header h2 {
            font-size: 2.4rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .section-header p {
            color: var(--text-silver);
            font-size: 1.1rem;
            max-width: 700px;
        }

        /* Metrics Dashboard */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-bottom: 80px;
        }

        .metric-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: left;
            transition: var(--transition-base);
        }

        .metric-card:hover {
            border-color: var(--accent-lime);
            box-shadow: var(--glow-lime);
        }

        .metric-icon {
            font-size: 2rem;
            color: var(--accent-lime);
            margin-bottom: 16px;
        }

        .metric-value {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .metric-label {
            color: var(--text-silver);
            font-size: 0.9rem;
        }

        /* Service Matrix */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 40px 32px;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

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

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

        .service-card:hover::before {
            transform: scaleX(1);
        }

        .service-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--accent-lime);
        }

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

        /* Comparison Table */
        .comparison-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0 12px;
        }

        .comparison-table th {
            text-align: left;
            padding: 16px 20px;
            font-weight: 600;
            color: var(--accent-lime);
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .comparison-table td {
            padding: 20px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            font-size: 0.95rem;
            color: var(--text-silver);
        }

        .comparison-table td:first-child {
            border-radius: var(--radius-sm) 0 0 var(--radius-sm);
            font-weight: 600;
            color: var(--text-white);
        }

        .comparison-table td:last-child {
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }

        .comparison-table tr td:first-child {
            background: rgba(163, 230, 53, 0.05);
        }

        /* Milestones */
        .milestone-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
        }

        .milestone-item {
            display: flex;
            gap: 32px;
            padding: 24px 0;
            border-left: 2px solid var(--card-border);
            padding-left: 40px;
            position: relative;
        }

        .milestone-item::before {
            content: '';
            position: absolute;
            left: -6px;
            top: 32px;
            width: 10px;
            height: 10px;
            background: var(--accent-lime);
            border-radius: 50%;
            box-shadow: var(--glow-lime);
        }

        .milestone-step {
            font-weight: 800;
            color: var(--accent-cyan);
            font-size: 1.1rem;
            min-width: 60px;
        }

        .milestone-content h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .milestone-content p {
            color: var(--text-silver);
            font-size: 0.95rem;
        }

        /* News List */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .news-card:hover {
            border-color: var(--accent-lime);
            box-shadow: var(--glow-lime);
        }

        .news-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .news-card-body {
            padding: 20px;
        }

        .news-card-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .news-card-body p {
            color: var(--text-silver);
            font-size: 0.9rem;
            margin-bottom: 12px;
        }

        .news-card-body .news-meta {
            display: flex;
            justify-content: space-between;
            color: var(--accent-cyan);
            font-size: 0.8rem;
        }

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

        .guarantee-item {
            text-align: left;
            padding: 32px 24px;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--card-border);
        }

        .guarantee-icon {
            font-size: 2.5rem;
            color: var(--accent-lime);
            margin-bottom: 16px;
        }

        .guarantee-item h4 {
            font-weight: 700;
            margin-bottom: 8px;
        }

        .guarantee-item p {
            color: var(--text-silver);
            font-size: 0.9rem;
        }

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

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
        }

        .faq-question {
            padding: 24px 28px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition-base);
        }

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

        .faq-answer {
            padding: 0 28px 24px;
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(163, 230, 53, 0.05), rgba(6, 182, 212, 0.05));
            border-radius: var(--radius-lg);
            border: 1px solid var(--card-border);
            padding: 60px 40px;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-section p {
            color: var(--text-silver);
            margin-bottom: 32px;
            font-size: 1.05rem;
        }

        /* Footer */
        .footer {
            padding: 80px 0 40px;
            border-top: 1px solid var(--card-border);
            margin-top: 90px;
        }

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

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-links h4 {
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--accent-lime);
        }

        .footer-links a {
            display: block;
            color: var(--text-silver);
            margin-bottom: 12px;
            font-size: 0.9rem;
            transition: var(--transition-base);
        }

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

        .copyright {
            text-align: center;
            color: var(--text-silver);
            font-size: 0.85rem;
            padding-top: 40px;
            border-top: 1px solid var(--card-border);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-content h1 {
                font-size: 2.5rem;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .nav-links.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(7, 7, 13, 0.95);
                padding: 24px;
                gap: 16px;
            }
            .hero {
                padding: 110px 0 50px;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .comparison-table thead {
                display: none;
            }
            .comparison-table tbody,
            .comparison-table tr,
            .comparison-table td {
                display: block;
            }
            .comparison-table td {
                border-radius: var(--radius-sm);
                margin-bottom: 8px;
            }
            .milestone-item {
                padding-left: 24px;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-content h1 {
                font-size: 1.7rem;
            }
            .section {
                padding: 60px 0;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

/* roulang page: category2 */
:root {
            --primary-bg: #07070D;
            --secondary-bg: #0E0E1E;
            --accent-lime: #A3E635;
            --accent-cyan: #06B6D4;
            --text-white: #FFFFFF;
            --text-silver: #94A3B8;
            --text-pink: #F43F5E;
            --card-bg: rgba(14, 14, 30, 0.8);
            --card-border: rgba(163, 230, 53, 0.15);
            --glow-lime: 0 0 20px rgba(163, 230, 53, 0.35);
            --glow-cyan: 0 0 25px rgba(6, 182, 212, 0.4);
            --radius-lg: 1.5rem;
            --radius-md: 1rem;
            --radius-sm: 0.75rem;
            --transition-base: all 0.25s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Be Vietnam Pro', sans-serif;
            background-color: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(7, 7, 13, 0.85);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(163, 230, 53, 0.1);
            transition: var(--transition-base);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            letter-spacing: -0.5px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition-base);
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-lime);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-lime);
            box-shadow: var(--glow-lime);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 10px 24px;
            border-radius: 2rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .btn-login:hover {
            background: rgba(6, 182, 212, 0.1);
            box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border: none;
            color: var(--primary-bg);
            padding: 10px 24px;
            border-radius: 2rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(163, 230, 53, 0.4);
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(163, 230, 53, 0.6);
            transform: translateY(-1px);
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
        }
        .page-banner {
            padding: 140px 0 60px;
            background: radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.1) 0%, transparent 60%);
            border-bottom: 1px solid rgba(163, 230, 53, 0.08);
        }
        .banner-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            background: linear-gradient(to right, #fff, var(--accent-lime));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .banner-content p {
            font-size: 1.1rem;
            color: var(--text-silver);
            max-width: 700px;
            margin-bottom: 32px;
        }
        .banner-stats {
            display: flex;
            gap: 40px;
            margin-top: 20px;
        }
        .stat-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-cyan);
            font-weight: 600;
        }
        .stat-item i {
            font-size: 1.2rem;
        }
        .section {
            padding: 80px 0;
        }
        .section-header {
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-white);
        }
        .section-header p {
            color: var(--text-silver);
            font-size: 1.05rem;
            max-width: 680px;
            line-height: 1.7;
        }
        .step-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 28px;
        }
        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            transition: var(--transition-base);
            position: relative;
            text-align: left;
        }
        .step-card:hover {
            border-color: rgba(163, 230, 53, 0.4);
            box-shadow: var(--glow-lime);
            transform: translateY(-3px);
        }
        .step-number {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            margin-bottom: 12px;
        }
        .step-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-white);
        }
        .step-card p {
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.65;
        }
        .banner-visual-area {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-top: 20px;
        }
        .banner-visual-area img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 40px -10px rgba(6, 182, 212, 0.2);
        }
        .promo-cta {
            background: linear-gradient(135deg, rgba(163, 230, 53, 0.08), rgba(6, 182, 212, 0.06));
            border: 1px solid rgba(163, 230, 53, 0.2);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            margin: 30px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .promo-cta h3 {
            font-size: 1.6rem;
            font-weight: 700;
        }
        .promo-cta p {
            color: var(--text-silver);
            margin-top: 8px;
            max-width: 500px;
        }
        .btn-cta-glow {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border: none;
            color: #000;
            padding: 14px 36px;
            border-radius: 2.5rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 1rem;
            box-shadow: 0 0 25px rgba(163, 230, 53, 0.5);
            white-space: nowrap;
        }
        .btn-cta-glow:hover {
            box-shadow: 0 0 40px rgba(163, 230, 53, 0.8);
            transform: scale(1.03);
        }
        .games-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 20px;
        }
        .game-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 18px;
            text-align: center;
            transition: var(--transition-base);
            cursor: pointer;
        }
        .game-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
            transform: translateY(-2px);
        }
        .game-card img {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            object-fit: cover;
            margin-bottom: 10px;
            border: 2px solid rgba(163, 230, 53, 0.2);
        }
        .game-card h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-white);
        }
        .comparison {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-top: 30px;
        }
        .compare-col {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
        }
        .compare-col h3 {
            margin-bottom: 16px;
            font-size: 1.3rem;
        }
        .compare-col ul {
            list-style: none;
            color: var(--text-silver);
        }
        .compare-col ul li {
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .compare-col ul li i.fa-check-circle {
            color: var(--accent-lime);
        }
        .compare-col ul li i.fa-times-circle {
            color: var(--text-pink);
        }
        .milestone-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .milestone h3 {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .milestone p {
            color: var(--text-silver);
            margin-top: 6px;
        }
        .articles-list {
            display: grid;
            gap: 24px;
        }
        .article-row {
            display: flex;
            align-items: center;
            gap: 24px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            transition: var(--transition-base);
        }
        .article-row:hover {
            border-color: var(--accent-lime);
            box-shadow: 0 0 15px rgba(163, 230, 53, 0.15);
        }
        .article-row img {
            width: 100px;
            height: 70px;
            object-fit: cover;
            border-radius: var(--radius-sm);
        }
        .article-meta {
            flex: 1;
        }
        .article-meta h4 {
            font-weight: 700;
            margin-bottom: 4px;
        }
        .article-meta h4 a {
            color: var(--text-white);
            text-decoration: none;
        }
        .article-meta h4 a:hover {
            color: var(--accent-lime);
        }
        .article-meta p {
            color: var(--text-silver);
            font-size: 0.9rem;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-sm);
            padding: 22px 24px;
            margin-bottom: 16px;
            transition: var(--transition-base);
        }
        .faq-item h4 {
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--accent-lime);
        }
        .faq-item p {
            color: var(--text-silver);
            font-size: 0.95rem;
        }
        .footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(163, 230, 53, 0.1);
            padding: 50px 0 30px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .footer-links h4 {
            margin-bottom: 16px;
            color: var(--text-white);
        }
        .footer-links a {
            display: block;
            color: var(--text-silver);
            text-decoration: none;
            margin-bottom: 10px;
            font-size: 0.95rem;
        }
        .footer-links a:hover {
            color: var(--accent-lime);
        }
        .copyright {
            text-align: center;
            color: var(--text-silver);
            font-size: 0.85rem;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border: none;
            color: #000;
            font-size: 1.4rem;
            box-shadow: 0 0 25px rgba(163, 230, 53, 0.5);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
        }
        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 40px rgba(163, 230, 53, 0.8);
        }
        @media (max-width: 1024px) {
            .nav-links {
                gap: 20px;
            }
            .hero-grid,
            .comparison {
                grid-template-columns: 1fr;
            }
            .milestone-row {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(7, 7, 13, 0.95);
                backdrop-filter: blur(16px);
                padding: 24px;
                border-bottom: 1px solid rgba(163, 230, 53, 0.1);
            }
            .nav-links.mobile-active {
                display: flex;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .banner-content h1 {
                font-size: 1.9rem;
            }
            .step-grid {
                grid-template-columns: 1fr;
            }
            .games-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .milestone-row {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category3 */
:root {
            --primary-bg: #07070D;
            --secondary-bg: #0E0E1E;
            --accent-lime: #A3E635;
            --accent-cyan: #06B6D4;
            --text-white: #FFFFFF;
            --text-silver: #94A3B8;
            --text-pink: #F43F5E;
            --card-bg: rgba(14, 14, 30, 0.8);
            --card-border: rgba(163, 230, 53, 0.15);
            --glow-lime: 0 0 20px rgba(163, 230, 53, 0.35);
            --glow-cyan: 0 0 25px rgba(6, 182, 212, 0.4);
            --radius-lg: 1.5rem;
            --radius-md: 1rem;
            --radius-sm: 0.75rem;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: 'Be Vietnam Pro', sans-serif;
            background-color: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
        }

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

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(7, 7, 13, 0.85);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(163, 230, 53, 0.1);
            transition: var(--transition-base);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            letter-spacing: -0.5px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition-base);
            position: relative;
        }

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

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-lime);
            box-shadow: var(--glow-lime);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 10px 24px;
            border-radius: 2rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(6, 182, 212, 0.1);
            box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border: none;
            color: var(--primary-bg);
            padding: 10px 24px;
            border-radius: 2rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(163, 230, 53, 0.4);
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(163, 230, 53, 0.6);
            transform: translateY(-1px);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Category Hero */
        .cat-hero {
            padding: 130px 0 70px;
            background: radial-gradient(circle at 30% 50%, rgba(6, 182, 212, 0.08) 0%, transparent 70%);
            border-bottom: 1px solid rgba(163, 230, 53, 0.08);
        }

        .cat-hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .cat-hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(to right, #fff, #A3E635);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .cat-hero-content .cat-sub {
            font-size: 1.15rem;
            color: var(--text-silver);
            margin-bottom: 32px;
            max-width: 520px;
            line-height: 1.7;
        }

        .cat-hero-stats {
            display: flex;
            gap: 40px;
            margin-bottom: 36px;
            flex-wrap: wrap;
        }

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

        .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-lime);
            letter-spacing: -1px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-silver);
            margin-top: 4px;
        }

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

        .cat-hero-visual img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: 0 25px 50px -12px rgba(163, 230, 53, 0.15);
            border: 1px solid rgba(163, 230, 53, 0.2);
        }

        /* Buttons */
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: var(--primary-bg);
            padding: 14px 32px;
            border-radius: 2.5rem;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(163, 230, 53, 0.4);
            font-size: 1rem;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            box-shadow: 0 0 30px rgba(163, 230, 53, 0.6);
            transform: translateY(-1px);
            filter: brightness(1.1);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 12px 28px;
            border-radius: 2rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            font-size: 0.95rem;
            cursor: pointer;
        }

        .btn-outline:hover {
            background: rgba(6, 182, 212, 0.1);
            box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
        }

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

        .section-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .section-grid img {
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        .section-content h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.3;
        }

        .section-content p {
            color: var(--text-silver);
            font-size: 1.05rem;
            margin-bottom: 20px;
            line-height: 1.7;
        }

        .feature-list {
            list-style: none;
            margin-top: 24px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
            color: var(--text-silver);
            line-height: 1.5;
        }

        .feature-list li i {
            color: var(--accent-lime);
            font-size: 1.2rem;
            margin-top: 2px;
            flex-shrink: 0;
        }

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

        .event-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            transition: var(--transition-base);
            back: blur(16px);
            position: relative;
            overflow: hidden;
        }

        .event-card:hover {
            border-color: rgba(163, 230, 53, 0.4);
            box-shadow: var(--glow-lime);
            transform: translateY(-4px);
        }

        .event-card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(163, 230, 53, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-lime);
            margin-bottom: 20px;
        }

        .event-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .event-card p {
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .card-tag {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 2rem;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(163, 230, 53, 0.15);
            color: var(--accent-lime);
        }

        .card-tag.hot {
            background: rgba(244, 63, 94, 0.15);
            color: var(--text-pink);
        }

        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .testimonial-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 28px;
        }

        .testimonial-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 16px;
        }

        .testimonial-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--primary-bg);
        }

        .testimonial-info .name {
            font-weight: 700;
            font-size: 1rem;
        }

        .testimonial-info .level {
            font-size: 0.8rem;
            color: var(--accent-lime);
        }

        .testimonial-text {
            color: var(--text-silver);
            line-height: 1.6;
            font-size: 0.95rem;
        }

        /* Info Grid */
        .info-grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .info-card {
            text-align: left;
            padding: 36px 28px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            transition: var(--transition-base);
        }

        .info-card:hover {
            border-color: rgba(6, 182, 212, 0.4);
            box-shadow: var(--glow-cyan);
        }

        .info-card .info-num {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 12px;
        }

        .info-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .info-card p {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* Leaderboard */
        .leaderboard {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 32px;
        }

        .leader-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .leader-row:last-child {
            border-bottom: none;
        }

        .leader-rank {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.95rem;
            background: rgba(163, 230, 53, 0.15);
            color: var(--accent-lime);
        }

        .leader-rank.top {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: var(--primary-bg);
        }

        .leader-name {
            font-weight: 600;
        }

        .leader-score {
            color: var(--accent-lime);
            font-weight: 700;
        }

        /* CTA Banner */
        .cta-banner {
            background: linear-gradient(135deg, rgba(163, 230, 53, 0.08), rgba(6, 182, 212, 0.08));
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
        }

        .cta-banner h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-banner p {
            color: var(--text-silver);
            max-width: 600px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }

        /* Footer */
        .footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(163, 230, 53, 0.1);
            padding: 60px 0 30px;
        }

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

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-links h4 {
            font-weight: 700;
            margin-bottom: 16px;
            font-size: 1rem;
        }

        .footer-links a {
            display: block;
            color: var(--text-silver);
            margin-bottom: 10px;
            font-size: 0.9rem;
            transition: var(--transition-base);
        }

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

        .copyright {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-silver);
            font-size: 0.85rem;
        }

        /* FAB */
        .fab-float {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(7, 7, 13, 0.8);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-lime);
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.45);
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab-float::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            padding: 2px;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
        }

        .fab-float:hover {
            transform: scale(1.1);
            box-shadow: 0 0 35px rgba(6, 182, 212, 0.65);
            opacity: 1;
        }

        .fab-float:active {
            transform: scale(0.95);
        }

        @keyframes fab-breathe {
            0%, 100% { opacity: 0.75; }
            50% { opacity: 1; }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .cat-hero-grid,
            .section-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .cards-grid,
            .info-grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .cat-hero-content h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .cards-grid,
            .info-grid-3,
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .cat-hero {
                padding: 110px 0 50px;
            }
            .cat-hero-content h1 {
                font-size: 1.9rem;
            }
            .cat-hero-stats {
                gap: 24px;
            }
            .stat-num {
                font-size: 1.6rem;
            }
            .cta-banner {
                padding: 40px 24px;
            }
            .cta-banner h2 {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 520px) {
            .nav-container {
                height: 64px;
            }
            .logo {
                font-size: 1.2rem;
            }
            .btn-login,
            .btn-signup {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
            .cat-hero-content h1 {
                font-size: 1.6rem;
            }
            .section-content h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category4 */
:root {
            --primary-bg: #07070D;
            --secondary-bg: #0E0E1E;
            --accent-lime: #A3E635;
            --accent-cyan: #06B6D4;
            --text-white: #FFFFFF;
            --text-silver: #94A3B8;
            --text-pink: #F43F5E;
            --card-bg: rgba(14, 14, 30, 0.8);
            --card-border: rgba(163, 230, 53, 0.15);
            --glow-lime: 0 0 20px rgba(163, 230, 53, 0.35);
            --glow-cyan: 0 0 25px rgba(6, 182, 212, 0.4);
            --radius-lg: 1.5rem;
            --radius-md: 1rem;
            --radius-sm: 0.75rem;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: 'Be Vietnam Pro', sans-serif;
            background-color: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        .navbar {
            position: fixed;
            top: 0; left: 0; width: 100%;
            z-index: 1000;
            background: rgba(7, 7, 13, 0.85);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(163, 230, 53, 0.1);
            transition: var(--transition-base);
        }

        .nav-container {
            display: flex; align-items: center; justify-content: space-between; height: 72px;
        }

        .logo {
            font-size: 1.5rem; font-weight: 800;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text; text-decoration: none; letter-spacing: -0.5px;
        }

        .nav-links { display: flex; align-items: center; gap: 32px; }
        .nav-links a {
            color: var(--text-silver); text-decoration: none; font-weight: 500;
            font-size: 0.95rem; transition: var(--transition-base); position: relative;
        }
        .nav-links a:hover, .nav-links a.active { color: var(--accent-lime); }
        .nav-links a.active::after {
            content: ''; position: absolute; bottom: -8px; left: 0; width: 100%;
            height: 2px; background: var(--accent-lime); box-shadow: var(--glow-lime);
        }

        .nav-actions { display: flex; align-items: center; gap: 16px; }
        .btn-login {
            background: transparent; border: 1px solid var(--accent-cyan); color: var(--accent-cyan);
            padding: 10px 24px; border-radius: 2rem; font-weight: 600; cursor: pointer;
            transition: var(--transition-base); font-size: 0.9rem; white-space: nowrap;
        }
        .btn-login:hover { background: rgba(6, 182, 212, 0.1); box-shadow: 0 0 15px rgba(6, 182, 212, 0.3); }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border: none; color: var(--primary-bg); padding: 10px 24px; border-radius: 2rem;
            font-weight: 700; cursor: pointer; transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(163, 230, 53, 0.4); font-size: 0.9rem; white-space: nowrap;
        }
        .btn-signup:hover { box-shadow: 0 0 30px rgba(163, 230, 53, 0.6); transform: translateY(-1px); }

        .mobile-menu-toggle { display: none; background: none; border: none; color: var(--text-white); font-size: 1.5rem; cursor: pointer; }

        .category-hero {
            padding: 130px 0 60px;
            background: radial-gradient(circle at 70% 40%, rgba(163, 230, 53, 0.1) 0%, transparent 60%);
            border-bottom: 1px solid rgba(163, 230, 53, 0.08);
        }
        .category-hero-grid {
            display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center;
        }
        .category-hero-content h1 {
            font-size: 2.8rem; font-weight: 800; line-height: 1.2; margin-bottom: 20px;
            background: linear-gradient(to right, #fff, #bef264); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
        }
        .category-hero-content p {
            font-size: 1.1rem; color: var(--text-silver); margin-bottom: 32px; max-width: 500px;
        }
        .btn-cta {
            background: var(--accent-lime); color: #000; border: none; padding: 14px 32px;
            font-weight: 700; border-radius: 2.5rem; display: inline-flex; align-items: center; gap: 10px;
            cursor: pointer; transition: var(--transition-base); font-size: 1rem;
        }
        .btn-cta:hover { background: #bef264; box-shadow: var(--glow-lime); transform: scale(1.02); }
        .promo-visual img { max-width: 100%; border-radius: var(--radius-lg); box-shadow: 0 20px 40px rgba(6, 182, 212, 0.2); }

        .section { padding: 70px 0; }
        .section-header { margin-bottom: 48px; }
        .section-header h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 14px; }
        .section-header p { color: var(--text-silver); font-size: 1.05rem; max-width: 650px; }

        .promo-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 28px; }
        .promo-card {
            background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius-md);
            padding: 32px; transition: var(--transition-base); position: relative; overflow: hidden;
        }
        .promo-card:hover { border-color: var(--accent-cyan); box-shadow: 0 0 25px rgba(6, 182, 212, 0.25); transform: translateY(-4px); }
        .promo-badge {
            position: absolute; top: 20px; right: 20px; background: var(--text-pink); color: #fff;
            padding: 6px 16px; border-radius: 2rem; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.5px;
        }
        .promo-icon { font-size: 2.5rem; margin-bottom: 18px; color: var(--accent-lime); }
        .promo-card h3 { font-size: 1.35rem; margin-bottom: 12px; }
        .promo-value { font-size: 2.2rem; font-weight: 800; color: var(--accent-cyan); margin-bottom: 8px; }
        .promo-card p { color: var(--text-silver); font-size: 0.95rem; }

        .milestone-section { padding: 70px 0; background: var(--secondary-bg); border-top: 1px solid rgba(163, 230, 53, 0.08); border-bottom: 1px solid rgba(163, 230, 53, 0.08); }
        .milestone-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
        .milestone-item { padding: 28px 16px; }
        .milestone-number { font-size: 2.8rem; font-weight: 800; background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .milestone-label { color: var(--text-silver); margin-top: 8px; font-weight: 500; }

        .how-it-works { padding: 70px 0; }
        .steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
        .step-card {
            background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius-md);
            padding: 28px; text-align: left; transition: var(--transition-base);
        }
        .step-number { font-size: 2.6rem; font-weight: 800; color: var(--accent-lime); opacity: 0.3; margin-bottom: 12px; }
        .step-card h4 { font-size: 1.15rem; margin-bottom: 8px; }

        .faq-section { padding: 70px 0; background: var(--secondary-bg); border-radius: var(--radius-lg); margin: 40px 0; }
        .faq-item { border-bottom: 1px solid rgba(163, 230, 53, 0.1); padding: 20px 0; }
        .faq-question {
            font-weight: 600; font-size: 1.1rem; cursor: pointer; display: flex;
            justify-content: space-between; align-items: center; color: var(--text-white);
        }
        .faq-answer { color: var(--text-silver); margin-top: 12px; display: none; padding-right: 32px; }
        .faq-item.active .faq-answer { display: block; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent-cyan); }

        .cta-section {
            padding: 80px 0; text-align: center;
            background: radial-gradient(circle at center, rgba(6, 182, 212, 0.1) 0%, transparent 60%);
        }
        .cta-section h2 { font-size: 2.4rem; font-weight: 800; margin-bottom: 16px; }
        .cta-section p { color: var(--text-silver); margin-bottom: 40px; font-size: 1.1rem; }

        .news-section { padding: 50px 0; }
        .news-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
        .news-card {
            background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius-md);
            overflow: hidden; transition: var(--transition-base);
        }
        .news-card:hover { border-color: var(--accent-lime); box-shadow: var(--glow-lime); transform: translateY(-2px); }
        .news-card img { width: 100%; height: 180px; object-fit: cover; }
        .news-card-body { padding: 20px; }
        .news-card-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .news-card-body p { color: var(--text-silver); font-size: 0.9rem; }
        .news-card-body a { color: var(--accent-lime); font-weight: 600; text-decoration: none; font-size: 0.85rem; }

        .footer {
            padding: 48px 0 24px; background: #05050A;
            border-top: 1px solid rgba(163, 230, 53, 0.08); color: var(--text-silver);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
        .footer-brand { font-size: 1.3rem; font-weight: 700; color: var(--accent-lime); }
        .footer-links h4 { color: var(--text-white); margin-bottom: 16px; font-size: 1rem; }
        .footer-links a { display: block; color: var(--text-silver); text-decoration: none; margin-bottom: 8px; font-size: 0.9rem; transition: var(--transition-base); }
        .footer-links a:hover { color: var(--accent-cyan); }
        .copyright { text-align: center; border-top: 1px solid rgba(163, 230, 53, 0.08); padding-top: 20px; font-size: 0.85rem; }

        .fab-left {
            position: fixed; left: 24px; bottom: 100px; z-index: 50;
            width: 56px; height: 56px; background: rgba(7, 7, 13, 0.85); backdrop-filter: blur(10px);
            border: 2px solid transparent; border-image: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan)) 1;
            border-radius: 50%; display: flex; align-items: center; justify-content: center;
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.45); color: var(--accent-lime);
            cursor: pointer; transition: all 0.3s ease; font-size: 1.3rem;
        }
        .fab-left:hover { transform: scale(1.12); box-shadow: 0 0 30px rgba(6, 182, 212, 0.7); }

        @media (max-width: 1024px) {
            .nav-links { gap: 20px; }
            .nav-links a { font-size: 0.85rem; }
            .category-hero-grid { grid-template-columns: 1fr; }
            .milestone-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-links, .nav-actions { display: none; }
            .mobile-menu-toggle { display: block; }
            .nav-links.mobile-open {
                display: flex; flex-direction: column; position: absolute; top: 72px; left: 0;
                width: 100%; background: rgba(7, 7, 13, 0.95); padding: 24px; gap: 18px;
            }
            .promo-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .milestone-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 520px) {
            .category-hero-content h1 { font-size: 2rem; }
            .section-header h2 { font-size: 1.7rem; }
            .milestone-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
        }