/* roulang page: index */
:root {
            --primary: #0F0C20;
            --secondary: #0B1A30;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --border-dark: #1E293B;
            --card-bg: #131B2E;
            --card-hover: #1A2540;
            --shadow-neon: 0 0 20px rgba(0, 240, 255, 0.25);
            --shadow-lime: 0 0 20px rgba(204, 255, 0, 0.25);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 2.5rem;
            --spacing-xl: 4rem;
            --font-main: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-main);
            background: var(--primary);
            color: var(--text-white);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-dark);
            transition: background var(--transition);
        }

        .site-header.scrolled {
            background: rgba(15, 12, 32, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: var(--spacing-sm);
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 800;
            font-size: 1.15rem;
            letter-spacing: -0.01em;
            color: var(--text-white);
            transition: color var(--transition);
        }

        .logo-link:hover {
            color: var(--accent-lime);
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 900;
            color: #0F0C20;
            flex-shrink: 0;
            box-shadow: 0 0 16px rgba(204, 255, 0, 0.35);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }

        .nav-list a {
            display: block;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-silver);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-list a:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-list a.active {
            color: var(--accent-lime);
            background: rgba(204, 255, 0, 0.1);
            box-shadow: inset 0 0 0 1px rgba(204, 255, 0, 0.25);
        }

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

        .btn-login {
            padding: 8px 16px;
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-white);
            border-radius: 999px;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-login:hover {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }

        .btn-signup {
            padding: 9px 20px;
            font-size: 0.9rem;
            font-weight: 800;
            color: #0F0C20;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border-radius: 999px;
            box-shadow: 0 4px 14px rgba(204, 255, 0, 0.3);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(0, 240, 255, 0.4);
            color: #0F0C20;
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            padding: 8px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            transition: background var(--transition);
        }

        .mobile-menu-toggle span {
            display: block;
            height: 2px;
            width: 100%;
            background: var(--text-white);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .mobile-menu-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 8px;
            padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
            background: rgba(15, 12, 32, 0.98);
            border-bottom: 1px solid var(--border-dark);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-silver);
            transition: all var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent-lime);
            background: rgba(204, 255, 0, 0.08);
        }

        /* Hero */
        .hero {
            position: relative;
            padding: 160px 0 80px;
            background: url('/assets/images/backpic/back-1.jpg') center / cover no-repeat;
            min-height: 720px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(105deg, rgba(15, 12, 32, 0.94) 20%, rgba(11, 26, 48, 0.82) 55%, rgba(15, 12, 32, 0.7) 100%);
        }

        .hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .hero-content {
            max-width: 720px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            background: rgba(204, 255, 0, 0.12);
            border: 1px solid rgba(204, 255, 0, 0.3);
            border-radius: 999px;
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--accent-lime);
            letter-spacing: 0.03em;
            margin-bottom: var(--spacing-md);
            text-transform: uppercase;
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            background: var(--accent-lime);
            border-radius: 50%;
            animation: pulse-dot 1.8s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.4); }
        }

        .hero h1 {
            font-size: clamp(2.4rem, 5.5vw, 4.2rem);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-md);
            background: linear-gradient(135deg, #FFFFFF 30%, var(--accent-lime) 60%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 0 60px rgba(0, 240, 255, 0.2);
        }

        .hero-subtitle {
            font-size: 1.12rem;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: var(--spacing-lg);
            max-width: 620px;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            margin-top: var(--spacing-lg);
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-stat .value {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--accent-lime);
            letter-spacing: -0.01em;
        }

        .hero-stat .label {
            font-size: 0.85rem;
            color: var(--text-silver);
            font-weight: 500;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: var(--spacing-lg);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 15px 30px;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: #0F0C20;
            font-weight: 900;
            font-size: 1rem;
            border-radius: 999px;
            box-shadow: 0 6px 24px rgba(204, 255, 0, 0.35);
            transition: all var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 240, 255, 0.45);
            color: #0F0C20;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-white);
            font-weight: 700;
            font-size: 1rem;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all var(--transition);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        /* Section Common */
        .section {
            padding: var(--spacing-xl) 0;
        }

        .section-header {
            margin-bottom: var(--spacing-lg);
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 1.02rem;
            color: var(--text-silver);
            max-width: 700px;
            line-height: 1.65;
        }

        /* Benefits Section */
        .benefits-section {
            background: var(--secondary);
            position: relative;
        }

        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: var(--spacing-md);
            margin-top: var(--spacing-lg);
        }

        .benefit-item {
            padding: var(--spacing-md);
            border-radius: var(--radius-md);
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            transition: all var(--transition);
        }

        .benefit-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
        }

        .benefit-icon {
            font-size: 2.2rem;
            margin-bottom: var(--spacing-sm);
            display: inline-block;
        }

        .benefit-item h3 {
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

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

        /* Price Comparison */
        .price-section {
            background: var(--primary);
        }

        .price-comparison {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-md);
            margin-top: var(--spacing-lg);
        }

        .price-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            position: relative;
            transition: all var(--transition);
        }

        .price-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
        }

        .price-card.featured {
            border-color: var(--accent-lime);
            box-shadow: var(--shadow-lime);
        }

        .price-badge {
            position: absolute;
            top: -12px;
            left: 24px;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: #0F0C20;
            font-size: 0.72rem;
            font-weight: 900;
            padding: 4px 14px;
            border-radius: 999px;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .price-card h3 {
            font-size: 1.25rem;
            font-weight: 800;
            margin-bottom: 6px;
        }

        .price-value {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--accent-lime);
            margin-bottom: var(--spacing-sm);
        }

        .price-value span {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-silver);
        }

        .price-features {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: var(--spacing-sm);
        }

        .price-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.92rem;
            color: var(--text-silver);
        }

        .price-features li::before {
            content: '✓';
            color: var(--accent-lime);
            font-weight: 900;
            flex-shrink: 0;
        }

        /* Changelog Section */
        .changelog-section {
            background: var(--secondary);
            position: relative;
        }

        .changelog-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            margin-top: var(--spacing-lg);
            max-width: 800px;
        }

        .changelog-item {
            display: flex;
            gap: var(--spacing-md);
            padding: var(--spacing-md);
            background: var(--card-bg);
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--accent-cyan);
            transition: all var(--transition);
        }

        .changelog-item:hover {
            border-left-color: var(--accent-lime);
            background: var(--card-hover);
        }

        .changelog-version {
            flex-shrink: 0;
            font-weight: 900;
            color: var(--accent-cyan);
            min-width: 60px;
            font-size: 0.95rem;
        }

        .changelog-content h4 {
            font-size: 1rem;
            font-weight: 800;
            margin-bottom: 4px;
        }

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

        /* Limited Offer Section */
        .offer-section {
            background: linear-gradient(135deg, #0B1A30 0%, #0F0C20 100%);
            position: relative;
            overflow: hidden;
        }

        .offer-section::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .offer-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
        }

        .offer-info {
            max-width: 520px;
        }

        .offer-info h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.4rem);
            font-weight: 900;
            margin-bottom: 12px;
        }

        .offer-info p {
            color: var(--text-silver);
            font-size: 1.02rem;
            margin-bottom: var(--spacing-md);
        }

        .countdown {
            display: flex;
            gap: 12px;
            margin: var(--spacing-md) 0;
        }

        .countdown-box {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 12px 18px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-sm);
            min-width: 70px;
        }

        .countdown-box .number {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--accent-lime);
        }

        .countdown-box .unit {
            font-size: 0.75rem;
            color: var(--text-silver);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .offer-visual {
            flex: 1;
            min-width: 280px;
            max-width: 480px;
        }

        .offer-visual img {
            border-radius: var(--radius-md);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
            border: 1px solid var(--border-dark);
            width: 100%;
            height: 300px;
            object-fit: cover;
        }

        /* News Section */
        .news-section {
            background: var(--primary);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: var(--spacing-lg);
            margin-top: var(--spacing-lg);
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .news-list-item {
            display: flex;
            align-items: baseline;
            gap: 14px;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border-bottom: 1px solid var(--border-dark);
        }

        .news-list-item:hover {
            background: var(--card-bg);
            transform: translateX(4px);
        }

        .news-date {
            flex-shrink: 0;
            font-size: 0.78rem;
            color: var(--accent-cyan);
            font-weight: 700;
            min-width: 70px;
        }

        .news-list-item h3 {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-white);
            transition: color var(--transition);
        }

        .news-list-item:hover h3 {
            color: var(--accent-lime);
        }

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

        .news-sidebar h3 {
            font-size: 1.05rem;
            font-weight: 800;
            margin-bottom: var(--spacing-sm);
            color: var(--accent-cyan);
        }

        .news-sidebar p {
            font-size: 0.9rem;
            color: var(--text-silver);
            margin-bottom: var(--spacing-sm);
        }

        .news-sidebar .btn-primary {
            width: 100%;
            justify-content: center;
            font-size: 0.9rem;
            padding: 12px 20px;
        }

        /* FAQ */
        .faq-section {
            background: var(--secondary);
        }

        .faq-list {
            max-width: 800px;
            margin-top: var(--spacing-lg);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-dark);
            padding: var(--spacing-sm) 0;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 12px 0;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            transition: color var(--transition);
            text-align: left;
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: var(--accent-cyan);
            font-weight: 900;
            transition: all var(--transition);
        }

        .faq-answer {
            display: none;
            padding: 0 0 var(--spacing-sm);
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.7;
        }

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

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

        .faq-item.active .faq-icon {
            background: rgba(204, 255, 0, 0.15);
            transform: rotate(45deg);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #0F0C20 0%, #0B1A30 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            bottom: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 900;
            margin-bottom: 16px;
        }

        .cta-content p {
            color: var(--text-silver);
            font-size: 1.05rem;
            margin-bottom: var(--spacing-lg);
        }

        /* Footer */
        .site-footer {
            background: #0A0818;
            border-top: 1px solid var(--border-dark);
            padding: var(--spacing-xl) 0 var(--spacing-md);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand h3 {
            font-size: 1.3rem;
            font-weight: 900;
            margin-bottom: 12px;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-silver);
            line-height: 1.6;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-white);
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            font-size: 0.88rem;
            color: var(--text-silver);
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-dark);
            padding-top: var(--spacing-md);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-silver);
        }

        .footer-bottom a {
            color: var(--accent-cyan);
            font-weight: 600;
        }

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

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 950;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(15, 12, 32, 0.85), rgba(15, 12, 32, 0.85)), linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 900;
            color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
            transition: all var(--transition);
            opacity: 0.6;
            animation: fab-float 3s ease-in-out infinite;
            cursor: pointer;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(204, 255, 0, 0.55);
            color: var(--accent-lime);
        }

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

        .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid #0F0C20;
            animation: pulse-notification 1.5s ease-in-out infinite;
        }

        @keyframes fab-float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }

        @keyframes pulse-notification {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.3); }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                padding: 0 var(--spacing-sm);
            }
            .hero {
                padding: 140px 0 60px;
                min-height: 640px;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .news-sidebar {
                order: -1;
            }
        }

        @media (max-width: 768px) {
            .main-nav .nav-list {
                display: none;
            }
            .auth-buttons {
                display: flex;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .mobile-menu.open {
                display: flex;
            }
            .hero {
                padding: 120px 0 50px;
                min-height: 560px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero-stats {
                gap: var(--spacing-sm);
            }
            .hero-stat .value {
                font-size: 1.5rem;
            }
            .section {
                padding: var(--spacing-lg) 0;
            }
            .price-comparison,
            .benefits-grid {
                grid-template-columns: 1fr;
            }
            .offer-wrapper {
                flex-direction: column;
                align-items: flex-start;
            }
            .countdown {
                flex-wrap: wrap;
            }
            .changelog-item {
                flex-direction: column;
                gap: 8px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .fab {
                left: 12px;
                bottom: 80px;
                width: 50px;
                height: 50px;
                font-size: 1.3rem;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                min-height: 60px;
                gap: 8px;
            }
            .logo-link {
                font-size: 0.95rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1.1rem;
            }
            .btn-login {
                padding: 7px 12px;
                font-size: 0.8rem;
            }
            .btn-signup {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
            .hero {
                padding: 110px 0 40px;
                min-height: 500px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 0.98rem;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 22px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .countdown-box {
                min-width: 55px;
                padding: 10px 14px;
            }
            .countdown-box .number {
                font-size: 1.4rem;
            }
            .news-list-item {
                flex-direction: column;
                gap: 4px;
            }
            .offer-visual img {
                height: 220px;
            }
        }

/* roulang page: article */
:root {
            --primary: #0052FF;
            --primary-dark: #0038B8;
            --primary-light: #E8F0FF;
            --accent: #00F0FF;
            --bg: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-dark: #0D111E;
            --text: #1A2332;
            --text-secondary: #4A5568;
            --text-muted: #718096;
            --border: #E2E8F0;
            --border-light: #EDF2F7;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-xxl: 96px;
            --font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-family);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.65;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border-width: 0;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition), background var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            background: rgba(255, 255, 255, 0.97);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text);
            flex-shrink: 0;
            letter-spacing: -0.01em;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.35rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(0, 82, 255, 0.3);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
            justify-content: flex-end;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .nav-list a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 4px;
            position: relative;
            transition: color var(--transition);
            white-space: nowrap;
        }

        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width var(--transition);
        }

        .nav-list a:hover,
        .nav-list a.active {
            color: var(--primary);
        }

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

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

        .btn-login {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 9px 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }

        .btn-login:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .btn-signup {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            box-shadow: 0 4px 12px rgba(0, 82, 255, 0.25);
        }

        .btn-signup:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(0, 82, 255, 0.4);
            transform: translateY(-1px);
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .mobile-menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .mobile-menu-toggle:hover {
            background: var(--primary-light);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px;
            z-index: 99;
            flex-direction: column;
            gap: 4px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            transform: translateY(-8px);
            opacity: 0;
            pointer-events: none;
            transition: all var(--transition);
        }

        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu a {
            padding: 14px 16px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }

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

        /* Article Layout */
        .article-page {
            padding-top: 72px;
            min-height: 100vh;
        }

        .article-hero-banner {
            background: var(--bg-dark);
            padding: var(--spacing-lg) 0 var(--spacing-md);
            position: relative;
            overflow: hidden;
        }

        .article-hero-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.25), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-hero-banner::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: var(--spacing-sm);
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .article-breadcrumb a {
            color: #A0AEC0;
            transition: color var(--transition);
        }

        .article-breadcrumb a:hover {
            color: #fff;
        }

        .article-breadcrumb .separator {
            color: #4A5568;
        }

        .article-breadcrumb .current {
            color: #E2E8F0;
            font-weight: 500;
        }

        .article-title-wrapper {
            position: relative;
            z-index: 1;
        }

        .article-title-wrapper h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-sm);
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: #A0AEC0;
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--accent);
        }

        .article-category-badge {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(0, 240, 255, 0.15);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 20px;
            border: 1px solid rgba(0, 240, 255, 0.3);
        }

        /* Article Content */
        .article-content-wrapper {
            padding: var(--spacing-lg) 0 var(--spacing-xl);
            background: var(--bg);
        }

        .article-content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            align-items: start;
        }

        .article-main-content {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: var(--spacing-lg);
            min-width: 0;
        }

        .article-main-content .article-featured-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: var(--spacing-lg);
            box-shadow: var(--shadow-sm);
        }

        .article-main-content .article-featured-image img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }

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

        .article-body h2 {
            font-size: 1.65rem;
            font-weight: 700;
            color: var(--text);
            margin: var(--spacing-lg) 0 var(--spacing-sm);
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            margin: var(--spacing-md) 0 var(--spacing-xs);
            line-height: 1.4;
        }

        .article-body p {
            margin-bottom: var(--spacing-sm);
            color: var(--text-secondary);
        }

        .article-body ul,
        .article-body ol {
            margin: var(--spacing-sm) 0 var(--spacing-md);
            padding-left: 24px;
        }

        .article-body ul li {
            list-style: none;
            position: relative;
            margin-bottom: 8px;
            color: var(--text-secondary);
        }

        .article-body ul li::before {
            content: '';
            position: absolute;
            left: -20px;
            top: 10px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
        }

        .article-body ol li {
            list-style: decimal;
            margin-bottom: 8px;
            color: var(--text-secondary);
        }

        .article-body strong {
            color: var(--text);
            font-weight: 700;
        }

        .article-body blockquote {
            margin: var(--spacing-md) 0;
            padding: var(--spacing-sm) var(--spacing-md);
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-body a {
            color: var(--primary);
            font-weight: 500;
            border-bottom: 1px solid rgba(0, 82, 255, 0.3);
        }

        .article-body a:hover {
            border-bottom-color: var(--primary);
        }

        .article-not-found {
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-lg);
            color: var(--text-secondary);
        }

        .article-not-found h2 {
            font-size: 1.8rem;
            margin-bottom: var(--spacing-sm);
            color: var(--text);
        }

        .article-not-found .btn-back {
            display: inline-block;
            margin-top: var(--spacing-md);
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }

        .article-not-found .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        /* Sidebar */
        .article-sidebar {
            position: sticky;
            top: 96px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-md);
            border: 1px solid var(--border-light);
        }

        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.01em;
        }

        .sidebar-article-list li {
            display: flex;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            align-items: flex-start;
        }

        .sidebar-article-list li:last-child {
            border-bottom: none;
        }

        .sidebar-article-list .side-thumb {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }

        .sidebar-article-list .side-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .sidebar-article-list a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            line-height: 1.4;
            transition: color var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .sidebar-article-list a:hover {
            color: var(--primary);
        }

        .sidebar-cta-card {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            box-shadow: 0 8px 24px rgba(0, 82, 255, 0.3);
        }

        .sidebar-cta-card h3 {
            color: #fff;
            font-size: 1.2rem;
        }

        .sidebar-cta-card p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: var(--spacing-sm);
        }

        .sidebar-cta-card .btn-cta {
            display: inline-block;
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            transition: all var(--transition);
        }

        .sidebar-cta-card .btn-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
        }

        /* CTA Section */
        .article-cta-section {
            background: var(--bg-dark);
            padding: var(--spacing-lg) 0;
            position: relative;
            overflow: hidden;
        }

        .article-cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.2), transparent 70%);
            border-radius: 50%;
        }

        .article-cta-content {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .article-cta-content h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
        }

        .article-cta-content p {
            color: #A0AEC0;
            font-size: 1rem;
            max-width: 500px;
        }

        .article-cta-content .btn-cta-large {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 6px 20px rgba(0, 82, 255, 0.4);
            white-space: nowrap;
        }

        .article-cta-content .btn-cta-large:hover {
            background: #fff;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(0, 82, 255, 0.5);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: #A0AEC0;
            padding: var(--spacing-xl) 0 var(--spacing-md);
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
            letter-spacing: -0.01em;
        }

        .footer-brand p {
            color: #718096;
            line-height: 1.7;
            font-size: 0.88rem;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: var(--spacing-sm);
        }

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

        .footer-col ul li a {
            color: #718096;
            font-size: 0.88rem;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.82rem;
            color: #4A5568;
        }

        /* FAB */
        .fab-button {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 60;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-dark);
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.4rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            opacity: 0.7;
            transition: all var(--transition);
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab-button:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
        }

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

        .fab-button .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--bg-dark);
            animation: fab-blink 1.5s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { opacity: 0.7; }
            50% { opacity: 1; }
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .article-content-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .sidebar-cta-card {
                grid-column: 1 / -1;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .header-inner {
                height: 64px;
            }

            .nav-list {
                display: none;
            }

            .auth-buttons .btn-login {
                display: none;
            }

            .auth-buttons .btn-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }

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

            .mobile-menu {
                display: flex;
                top: 64px;
            }

            .article-page {
                padding-top: 64px;
            }

            .article-title-wrapper h1 {
                font-size: 1.7rem;
            }

            .article-main-content {
                padding: var(--spacing-md);
                border-radius: var(--radius-md);
            }

            .article-body {
                font-size: 0.98rem;
            }

            .article-body h2 {
                font-size: 1.35rem;
            }

            .article-body h3 {
                font-size: 1.15rem;
            }

            .article-cta-content {
                flex-direction: column;
                align-items: flex-start;
            }

            .article-cta-content h2 {
                font-size: 1.4rem;
            }

            .article-cta-content .btn-cta-large {
                width: 100%;
                text-align: center;
            }

            .sidebar-card {
                padding: var(--spacing-sm);
            }

            .fab-button {
                left: 12px;
                bottom: 80px;
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                height: 60px;
            }

            .logo-link {
                font-size: 0.95rem;
            }

            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1.1rem;
                border-radius: 8px;
            }

            .mobile-menu {
                top: 60px;
            }

            .article-page {
                padding-top: 60px;
            }

            .article-title-wrapper h1 {
                font-size: 1.4rem;
            }

            .article-meta {
                font-size: 0.8rem;
                gap: 10px;
            }

            .article-main-content {
                padding: var(--spacing-sm);
            }

            .article-body {
                font-size: 0.92rem;
                line-height: 1.7;
            }

            .article-body h2 {
                font-size: 1.2rem;
            }

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

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

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

/* roulang page: category1 */
:root {
            --primary-bg: #0B1A30;
            --secondary-bg: #0F0C20;
            --card-bg: rgba(15, 20, 40, 0.85);
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --accent-gold: #FFD700;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #7B8496;
            --border-neon: rgba(0, 240, 255, 0.35);
            --border-lime: rgba(204, 255, 0, 0.4);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.25);
            --shadow-lime: 0 0 18px rgba(204, 255, 0, 0.2);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
        }

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

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

        body {
            font-family: var(--font-main);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(circle at 20% 20%, rgba(0, 240, 255, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(204, 255, 0, 0.04) 0%, transparent 50%),
                linear-gradient(180deg, #0F0C20 0%, #0B1A30 100%);
        }

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

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 26, 48, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
            transition: background var(--transition-base);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 70px;
            gap: var(--spacing-md);
            flex-wrap: nowrap;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-white);
            letter-spacing: -0.02em;
            white-space: nowrap;
            transition: transform var(--transition-fast), color var(--transition-fast);
        }

        .logo-link:hover {
            color: var(--accent-lime);
            transform: translateY(-1px);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: #0B1A30;
            font-weight: 900;
            font-size: 1.4rem;
            border-radius: 50%;
            box-shadow: 0 0 12px rgba(204, 255, 0, 0.4);
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex: 1;
            justify-content: flex-end;
        }

        .nav-list {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 0.25rem;
            flex-wrap: nowrap;
        }

        .nav-list a {
            display: inline-block;
            padding: 0.6rem 1rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-silver);
            transition: all var(--transition-fast);
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .nav-list a:hover {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.1);
            border-color: rgba(0, 240, 255, 0.25);
        }

        .nav-list a.active {
            color: #0B1A30;
            background: var(--accent-lime);
            border-color: var(--accent-lime);
            box-shadow: 0 0 12px rgba(204, 255, 0, 0.4);
            font-weight: 700;
        }

        .auth-buttons {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            margin-left: 0.75rem;
            flex-shrink: 0;
        }

        .btn-login,
        .btn-signup {
            padding: 0.55rem 1.25rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
            cursor: pointer;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.3);
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }

        .btn-signup {
            background: var(--accent-lime);
            color: #0B1A30;
            box-shadow: 0 0 14px rgba(204, 255, 0, 0.35);
        }

        .btn-signup:hover {
            background: #D9FF33;
            box-shadow: 0 0 20px rgba(204, 255, 0, 0.55);
            transform: translateY(-2px);
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 8px;
            cursor: pointer;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .mobile-menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-white);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(11, 26, 48, 0.98);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: var(--spacing-sm);
            gap: 0.3rem;
            backdrop-filter: blur(20px);
        }

        .mobile-menu a {
            padding: 0.8rem 1.2rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            color: var(--text-silver);
            transition: all var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: #0B1A30;
            background: var(--accent-lime);
        }

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

        /* ========== PAGE HERO ========== */
        .page-hero {
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            position: relative;
            overflow: hidden;
            background-image: linear-gradient(135deg, rgba(0, 240, 255, 0.08) 0%, transparent 50%),
                url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 26, 48, 0.75) 0%, rgba(11, 26, 48, 0.9) 100%);
            z-index: 1;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.45rem 1.2rem;
            background: rgba(204, 255, 0, 0.12);
            border: 1px solid rgba(204, 255, 0, 0.4);
            color: var(--accent-lime);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: var(--spacing-sm);
        }

        .page-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.03em;
            max-width: 850px;
            margin-bottom: var(--spacing-sm);
            background: linear-gradient(135deg, var(--text-white) 30%, var(--accent-cyan) 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-hero .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-silver);
            max-width: 650px;
            line-height: 1.7;
            margin-bottom: var(--spacing-md);
        }

        .hero-stats {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
            margin-top: var(--spacing-md);
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
            gap: 0.2rem;
            padding: 1rem 1.5rem;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            min-width: 140px;
            transition: all var(--transition-fast);
        }

        .hero-stat-item:hover {
            border-color: rgba(0, 240, 255, 0.4);
            background: rgba(0, 240, 255, 0.06);
        }

        .hero-stat-value {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--accent-lime);
            letter-spacing: -0.02em;
        }

        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ========== MAIN CONTENT SECTIONS ========== */
        main {
            padding: var(--spacing-lg) 0 var(--spacing-xl);
        }

        .section {
            margin-bottom: var(--spacing-xl);
        }

        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-md);
            flex-wrap: wrap;
        }

        .section-header-left {
            flex: 1;
            min-width: 280px;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.3rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-white);
            margin-bottom: 0.4rem;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 600px;
        }

        .section-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--accent-cyan);
            white-space: nowrap;
            transition: all var(--transition-fast);
        }

        .section-link:hover {
            color: var(--accent-lime);
            gap: 0.8rem;
        }

        /* Game Ranking Cards */
        .game-ranking-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .game-ranking-item {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            padding: 1.2rem 1.5rem;
            background: var(--card-bg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .game-ranking-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background: linear-gradient(180deg, var(--accent-lime), var(--accent-cyan));
            opacity: 0;
            transition: opacity var(--transition-fast);
        }

        .game-ranking-item:hover {
            border-color: var(--border-neon);
            box-shadow: var(--shadow-neon);
            transform: translateY(-2px);
        }

        .game-ranking-item:hover::before {
            opacity: 1;
        }

        .rank-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            font-weight: 900;
            font-size: 1.3rem;
            flex-shrink: 0;
            background: rgba(255, 255, 255, 0.06);
            border: 2px solid rgba(255, 255, 255, 0.15);
            color: var(--text-silver);
            transition: all var(--transition-fast);
        }

        .game-ranking-item:nth-child(1) .rank-number {
            background: var(--accent-gold);
            border-color: var(--accent-gold);
            color: #0B1A30;
            box-shadow: 0 0 15px rgba(255, 215, 0, 0.5);
        }

        .game-ranking-item:nth-child(2) .rank-number {
            background: #C0C0C0;
            border-color: #C0C0C0;
            color: #0B1A30;
            box-shadow: 0 0 12px rgba(192, 192, 192, 0.4);
        }

        .game-ranking-item:nth-child(3) .rank-number {
            background: #CD7F32;
            border-color: #CD7F32;
            color: #0B1A30;
            box-shadow: 0 0 12px rgba(205, 127, 50, 0.4);
        }

        .game-info {
            flex: 1;
            min-width: 0;
        }

        .game-name {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 0.25rem;
        }

        .game-meta {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .game-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        .game-jackpot {
            text-align: right;
            flex-shrink: 0;
        }

        .game-jackpot-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.03em;
            font-weight: 600;
        }

        .game-jackpot-value {
            font-size: 1.4rem;
            font-weight: 900;
            color: var(--accent-lime);
            text-shadow: 0 0 10px rgba(204, 255, 0, 0.4);
        }

        .game-hot-tag {
            display: inline-block;
            padding: 0.25rem 0.7rem;
            background: rgba(255, 0, 100, 0.15);
            border: 1px solid rgba(255, 0, 100, 0.5);
            color: #FF4081;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            animation: pulse-tag 1.5s infinite;
        }

        @keyframes pulse-tag {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.6; }
        }

        /* Winners Section */
        .winners-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-md);
        }

        .winner-card {
            background: var(--card-bg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: all var(--transition-base);
            position: relative;
        }

        .winner-card:hover {
            border-color: var(--border-lime);
            box-shadow: var(--shadow-lime);
            transform: translateY(-3px);
        }

        .winner-avatar {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.4rem;
            color: #0B1A30;
            margin-bottom: var(--spacing-sm);
        }

        .winner-name {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 0.3rem;
        }

        .winner-detail {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: var(--spacing-sm);
        }

        .winner-amount {
            font-size: 1.3rem;
            font-weight: 900;
            color: var(--accent-lime);
            text-shadow: 0 0 10px rgba(204, 255, 0, 0.3);
        }

        /* Tips Section */
        .tips-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: var(--spacing-lg);
            align-items: start;
        }

        .tips-content {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .tip-item {
            padding: 1.2rem 1.5rem;
            background: rgba(255, 255, 255, 0.03);
            border-left: 3px solid var(--accent-cyan);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            transition: all var(--transition-fast);
        }

        .tip-item:hover {
            background: rgba(0, 240, 255, 0.05);
            border-left-color: var(--accent-lime);
        }

        .tip-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 0.35rem;
        }

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

        .tips-image-wrapper {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.2);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
            position: relative;
        }

        .tips-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 300px;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(204, 255, 0, 0.08) 0%, rgba(0, 240, 255, 0.08) 100%);
            border: 1px solid rgba(204, 255, 0, 0.25);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.15) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-silver);
            max-width: 550px;
            margin: 0 auto var(--spacing-md);
            position: relative;
            z-index: 1;
        }

        .cta-buttons {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn-primary,
        .btn-outline {
            padding: 0.8rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-base);
            cursor: pointer;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--accent-lime);
            color: #0B1A30;
            box-shadow: 0 0 20px rgba(204, 255, 0, 0.4);
        }

        .btn-primary:hover {
            background: #D9FF33;
            box-shadow: 0 0 30px rgba(204, 255, 0, 0.6);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(0, 240, 255, 0.5);
            color: var(--accent-cyan);
        }

        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            transform: translateY(-2px);
        }

        /* FAQ Section */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
        }

        .faq-question {
            width: 100%;
            padding: 1.2rem 1.5rem;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.05rem;
            text-align: left;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            transition: all var(--transition-fast);
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            font-size: 1.2rem;
            transition: transform var(--transition-base);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 1.5rem;
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding-bottom: 1.5rem;
        }

        /* ========== FAB ========== */
        .floating-fab {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 950;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(11, 26, 48, 0.75);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(11, 26, 48, 0.75), rgba(11, 26, 48, 0.75)), linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0.6;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: all var(--transition-base);
            animation: fab-breathe 3s infinite;
        }

        .floating-fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
        }

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

        .fab-icon {
            font-size: 1.6rem;
            color: var(--accent-lime);
            animation: fab-glow 2s infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

        @keyframes fab-glow {
            0%, 100% { filter: drop-shadow(0 0 5px rgba(204, 255, 0, 0.5)); }
            50% { filter: drop-shadow(0 0 12px rgba(204, 255, 0, 0.9)); }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0B1A30;
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: var(--spacing-lg) 0 var(--spacing-md);
            margin-top: var(--spacing-xl);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand h3 {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 0.8rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 0.8rem;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-col a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .tips-layout {
                grid-template-columns: 1fr;
            }
            .tips-image-wrapper {
                max-height: 280px;
            }
            .tips-image-wrapper img {
                min-height: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                min-height: 60px;
                gap: var(--spacing-sm);
            }
            .nav-list {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .auth-buttons {
                margin-left: auto;
            }
            .btn-login,
            .btn-signup {
                padding: 0.45rem 0.9rem;
                font-size: 0.8rem;
            }
            .page-hero {
                padding: var(--spacing-lg) 0 var(--spacing-md);
            }
            .page-hero h1 {
                font-size: clamp(1.8rem, 6vw, 2.5rem);
            }
            .hero-stats {
                gap: var(--spacing-sm);
            }
            .hero-stat-item {
                padding: 0.8rem 1rem;
                min-width: 100px;
            }
            .hero-stat-value {
                font-size: 1.4rem;
            }
            .game-ranking-item {
                flex-wrap: wrap;
                padding: 1rem;
                gap: var(--spacing-sm);
            }
            .game-jackpot {
                text-align: left;
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 0.5rem;
            }
            .cta-section {
                padding: var(--spacing-md);
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
            .auth-buttons {
                gap: 0.4rem;
            }
            .btn-login,
            .btn-signup {
                padding: 0.4rem 0.7rem;
                font-size: 0.75rem;
            }
            .logo-link {
                font-size: 1rem;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1.1rem;
            }
            .hero-stats {
                flex-direction: column;
            }
            .hero-stat-item {
                min-width: 100%;
            }
            .floating-fab {
                width: 48px;
                height: 48px;
                left: 0.75rem;
                bottom: 5rem;
            }
            .game-ranking-item {
                align-items: flex-start;
            }
            .rank-number {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0A2E1C;
            --primary-dark: #062315;
            --secondary: #123E25;
            --accent: #FFD700;
            --accent-red: #D32F2F;
            --text-light: #FFFFFF;
            --text-mint: #D1F2EB;
            --text-gray: #9BA7A0;
            --border-gold: rgba(255, 215, 0, 0.3);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
            --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-2xl: 80px;
            --font-family: 'Be Vietnam Pro', 'Inter', sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--primary);
            color: var(--text-light);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        a:hover {
            color: var(--text-mint);
        }

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

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

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 46, 28, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-gold);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: 20px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-light);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .logo-link:hover {
            color: var(--accent);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent) 0%, #FFA500 100%);
            color: var(--primary-dark);
            font-weight: 800;
            font-size: 1.3rem;
            border-radius: 10px;
            box-shadow: var(--shadow-gold);
            transition: transform var(--transition);
        }

        .logo-link:hover .logo-icon {
            transform: rotate(-8deg) scale(1.05);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }

        .nav-list a {
            display: block;
            padding: 8px 16px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-gray);
            border-radius: 100px;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-list a:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-list a.active {
            color: var(--primary-dark);
            background: var(--accent);
            font-weight: 600;
            box-shadow: var(--shadow-gold);
        }

        .auth-buttons {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: 8px;
        }

        .btn-login, .btn-signup {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 100px;
            transition: all var(--transition);
            white-space: nowrap;
            cursor: pointer;
            border: none;
        }

        .btn-login {
            color: var(--text-light);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
        }

        .btn-login:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(255, 215, 0, 0.08);
        }

        .btn-signup {
            color: var(--primary-dark);
            background: linear-gradient(135deg, var(--accent) 0%, #FFC107 100%);
            font-weight: 700;
            box-shadow: var(--shadow-gold);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.3);
            color: var(--primary-dark);
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .mobile-menu-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-light);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .mobile-menu-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .mobile-menu-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .mobile-menu-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            padding: 16px 24px 24px;
            background: rgba(10, 46, 28, 0.98);
            border-top: 1px solid var(--border-gold);
        }

        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            color: var(--text-gray);
            font-weight: 500;
            border-radius: 8px;
            transition: all var(--transition);
        }

        .mobile-menu a:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.06);
        }

        .mobile-menu a.active {
            color: var(--primary-dark);
            background: var(--accent);
            font-weight: 600;
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            padding: 80px 0 60px;
            text-align: center;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 46, 28, 0.92) 0%, rgba(6, 35, 21, 0.85) 100%);
        }

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

        .page-banner h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-mint);
        }

        .page-banner .breadcrumb a {
            color: var(--accent);
        }

        .page-banner .breadcrumb span {
            color: var(--text-gray);
        }

        /* Content Sections */
        .content-section {
            padding: var(--spacing-2xl) 0;
        }

        .content-section:nth-child(even) {
            background: rgba(6, 35, 21, 0.5);
        }

        .section-header {
            max-width: 720px;
            margin-bottom: var(--spacing-xl);
        }

        .section-header.left-aligned {
            text-align: left;
            margin-left: 0;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-gray);
            line-height: 1.7;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(255, 215, 0, 0.12);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 100px;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 16px;
            border: 1px solid var(--border-gold);
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            min-height: 480px;
            display: flex;
            align-items: center;
            padding: 100px 0;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 46, 28, 0.9) 0%, rgba(6, 35, 21, 0.75) 50%, rgba(10, 46, 28, 0.9) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 650px;
        }

        .hero-content h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
            line-height: 1.15;
        }

        .hero-content h1 .highlight {
            color: var(--accent);
            display: block;
            margin-top: 8px;
        }

        .hero-content p {
            font-size: 1.15rem;
            color: var(--text-mint);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 550px;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            background: linear-gradient(135deg, var(--accent) 0%, #FFC107 100%);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1rem;
            border-radius: 100px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: var(--shadow-gold);
            text-decoration: none;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(255, 215, 0, 0.35);
            color: var(--primary-dark);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-light);
            font-weight: 600;
            font-size: 1rem;
            border-radius: 100px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            backdrop-filter: blur(8px);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.18);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-3px);
        }

        /* Hero Stats */
        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border-gold);
        }

        .stat-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .stat-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -0.01em;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-gray);
        }

        /* Knowledge Cards */
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .knowledge-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .knowledge-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), transparent);
            opacity: 0;
            transition: opacity var(--transition);
        }

        .knowledge-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-gold);
            box-shadow: var(--shadow-md);
            background: rgba(255, 255, 255, 0.07);
        }

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

        .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: rgba(255, 215, 0, 0.12);
            border-radius: 12px;
            margin-bottom: 16px;
            font-size: 1.3rem;
            color: var(--accent);
            border: 1px solid var(--border-gold);
        }

        .knowledge-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

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

        /* Experience List */
        .experience-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .experience-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 24px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }

        .experience-item:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--border-gold);
            transform: translateX(4px);
        }

        .experience-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent) 0%, #FFC107 100%);
            color: var(--primary-dark);
            font-weight: 800;
            font-size: 1.1rem;
            border-radius: 50%;
            flex-shrink: 0;
        }

        .experience-content h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 8px;
        }

        .experience-content p {
            font-size: 0.95rem;
            color: var(--text-gray);
            line-height: 1.7;
        }

        /* Testimonial Section */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .testimonial-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 28px;
            position: relative;
            transition: all var(--transition);
        }

        .testimonial-card:hover {
            border-color: var(--border-gold);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .testimonial-quote {
            font-size: 0.95rem;
            color: var(--text-mint);
            line-height: 1.7;
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .testimonial-avatar {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent) 0%, #FFA500 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary-dark);
            font-size: 1rem;
        }

        .testimonial-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-light);
        }

        .testimonial-info span {
            font-size: 0.8rem;
            color: var(--text-gray);
        }

        .win-amount {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(255, 215, 0, 0.15);
            color: var(--accent);
            font-weight: 700;
            font-size: 0.85rem;
            border-radius: 100px;
            margin-bottom: 12px;
            border: 1px solid var(--border-gold);
        }

        /* FAQ Section */
        .faq-section {
            background: rgba(6, 35, 21, 0.6);
        }

        .faq-list {
            max-width: 800px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            text-align: left;
            transition: all var(--transition);
            gap: 16px;
        }

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

        .faq-question i {
            color: var(--accent);
            transition: transform var(--transition);
            font-size: 0.85rem;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }

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

        .faq-answer p {
            color: var(--text-gray);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--accent) 0%, #FFC107 50%, #FFB300 100%);
            padding: var(--spacing-2xl) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 70%);
            animation: pulse-glow 3s ease-in-out infinite;
        }

        @keyframes pulse-glow {
            0%, 100% { opacity: 0.5; }
            50% { opacity: 1; }
        }

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

        .cta-content h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .cta-content p {
            font-size: 1.05rem;
            color: rgba(10, 46, 28, 0.8);
            margin-bottom: 32px;
            max-width: 550px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-dark {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 32px;
            background: var(--primary-dark);
            color: var(--accent);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 100px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            box-shadow: 0 8px 24px rgba(10, 46, 28, 0.3);
        }

        .btn-cta-dark:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(10, 46, 28, 0.4);
            color: var(--accent);
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, #1A1A1A 0%, #2A2A2A 100%);
            border: 2px solid var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.3rem;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            opacity: 0.7;
            animation: fab-float 3s ease-in-out infinite;
            text-decoration: none;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 32px rgba(255, 215, 0, 0.5);
            color: var(--accent);
        }

        .fab:active {
            transform: scale(0.95) translateY(2px);
        }

        .fab .notification-dot {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 14px;
            height: 14px;
            background: #FF0040;
            border-radius: 50%;
            border: 2px solid #1A1A1A;
            animation: blink 2s ease-in-out infinite;
        }

        @keyframes fab-float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }

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

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            padding: var(--spacing-xl) 0 24px;
            border-top: 1px solid var(--border-gold);
        }

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

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-gray);
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            color: var(--text-gray);
            font-size: 0.88rem;
            transition: all var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.8rem;
            color: var(--text-gray);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }

            .hero-content h1 {
                font-size: 2.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

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

        @media (max-width: 768px) {
            .header-inner {
                min-height: 64px;
                gap: 12px;
            }

            .logo-link span:last-child {
                font-size: 1rem;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }

            .main-nav {
                gap: 8px;
            }

            .nav-list {
                display: none;
            }

            .auth-buttons {
                margin-left: auto;
            }

            .btn-login, .btn-signup {
                padding: 7px 14px;
                font-size: 0.8rem;
            }

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

            .mobile-menu {
                display: block;
            }

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

            .hero-content h1 {
                font-size: 2rem;
            }

            .hero-content p {
                font-size: 1rem;
            }

            .page-banner {
                padding: 50px 0 40px;
            }

            .page-banner h1 {
                font-size: 1.8rem;
            }

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

            .knowledge-grid,
            .testimonial-grid {
                grid-template-columns: 1fr;
            }

            .hero-stats {
                gap: 20px;
            }

            .stat-value {
                font-size: 1.4rem;
            }

            .content-section {
                padding: var(--spacing-xl) 0;
            }

            .experience-item {
                flex-direction: column;
                gap: 12px;
            }

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

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

            .fab {
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
                bottom: 80px;
                left: 12px;
            }
        }

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

            .logo-link span:last-child {
                display: none;
            }

            .hero-content h1 {
                font-size: 1.7rem;
            }

            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }

            .btn-primary, .btn-secondary {
                width: 100%;
                justify-content: center;
            }

            .page-banner h1 {
                font-size: 1.5rem;
            }

            .section-header h2 {
                font-size: 1.3rem;
            }

            .knowledge-card {
                padding: 20px;
            }

            .testimonial-card {
                padding: 20px;
            }

            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }

            .faq-answer {
                padding: 0 16px;
            }

            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }