/* roulang page: index */
:root {
            --bg-dark: #0B1A30;
            --bg-deep: #0F0C20;
            --bg-card: #132240;
            --accent-cyan: #00F0FF;
            --accent-lime: #CCFF00;
            --accent-pink: #FF007F;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #6B7280;
            --border-neon: #00F0FF;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-strong: 0 20px 50px rgba(0, 0, 0, 0.6);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Be Vietnam Pro', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            background: linear-gradient(135deg, var(--bg-deep) 0%, var(--bg-dark) 100%);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        .container-wide { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
        .container-narrow { max-width: 960px; margin: 0 auto; padding: 0 20px; }
        .section { padding: 80px 0; position: relative; }
        .section-sm { padding: 50px 0; }
        .section-tight { padding: 30px 0; }
        .section-label {
            display: inline-block;
            padding: 8px 20px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.4);
            border-radius: 50px;
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 18px;
        }
        .section-title {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            color: var(--text-white);
        }
        .section-desc {
            font-size: 17px;
            line-height: 1.7;
            color: var(--text-silver);
            max-width: 720px;
            margin-bottom: 40px;
        }
        .text-gradient {
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-lime) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 15px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-cyan) 0%, #00b4d8 100%);
            color: #0B1A30;
            box-shadow: 0 8px 25px rgba(0, 240, 255, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(0, 240, 255, 0.55);
            color: #0B1A30;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.1);
            transform: translateY(-3px);
            box-shadow: var(--shadow-neon);
            color: var(--accent-cyan);
        }
        .btn-lime {
            background: linear-gradient(135deg, var(--accent-lime) 0%, #a8e000 100%);
            color: #0B1A30;
            box-shadow: 0 8px 25px rgba(204, 255, 0, 0.35);
        }
        .btn-lime:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(204, 255, 0, 0.55);
            color: #0B1A30;
        }
        .btn-sm { padding: 10px 20px; font-size: 13px; }
        .btn-lg { padding: 18px 36px; font-size: 17px; }
        .badge {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .badge-hot {
            background: rgba(255, 0, 127, 0.15);
            color: var(--accent-pink);
            border: 1px solid rgba(255, 0, 127, 0.5);
        }
        .badge-new {
            background: rgba(0, 240, 255, 0.15);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.5);
        }
        .badge-green {
            background: rgba(204, 255, 0, 0.15);
            color: var(--accent-lime);
            border: 1px solid rgba(204, 255, 0, 0.5);
        }
        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(11, 26, 48, 0.98);
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            gap: 20px;
        }
        .logo {
            font-size: 22px;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: var(--text-white);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0B1A30;
            font-size: 22px;
            flex-shrink: 0;
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.1;
        }
        .logo-text strong {
            font-size: 18px;
            font-weight: 900;
            color: var(--text-white);
        }
        .logo-text span {
            font-size: 11px;
            color: var(--accent-cyan);
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .main-nav a {
            padding: 10px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            color: var(--text-silver);
            transition: var(--transition);
            white-space: nowrap;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            background: transparent;
            border: none;
            color: var(--text-silver);
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            padding: 10px 16px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-login:hover { color: var(--accent-cyan); }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lime) 0%, #a8e000 100%);
            color: #0B1A30;
            border: none;
            padding: 12px 24px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 15px rgba(204, 255, 0, 0.35);
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(204, 255, 0, 0.55);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            width: 44px;
            height: 44px;
            border-radius: 12px;
            font-size: 20px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }
        /* Hero */
        .hero {
            padding: 150px 0 80px;
            background: linear-gradient(135deg, rgba(15, 12, 32, 0.95) 0%, rgba(11, 26, 48, 0.9) 100%), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-dark), transparent);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 850px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.4);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: 24px;
        }
        .hero-badge i {
            animation: pulse 1.5s infinite;
        }
        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        .hero h1 {
            font-size: clamp(32px, 5vw, 56px);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 24px;
            color: var(--text-white);
        }
        .hero p {
            font-size: 18px;
            line-height: 1.7;
            color: var(--text-silver);
            max-width: 680px;
            margin-bottom: 32px;
        }
        .hero-cta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
        }
        .hero-stat strong {
            font-size: 32px;
            font-weight: 900;
            color: var(--accent-cyan);
            letter-spacing: -0.5px;
        }
        .hero-stat span {
            font-size: 13px;
            color: var(--text-silver);
            font-weight: 500;
        }
        /* Floating Action Button */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 90;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(11, 26, 48, 0.85);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            animation: fabGlow 2s infinite alternate;
            text-decoration: none;
        }
        .fab-left::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            z-index: -1;
            opacity: 0.6;
        }
        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
            opacity: 1;
        }
        .fab-left i {
            font-size: 24px;
            color: var(--accent-cyan);
        }
        @keyframes fabGlow {
            0% { box-shadow: 0 0 10px rgba(0, 240, 255, 0.3); }
            100% { box-shadow: 0 0 25px rgba(0, 240, 255, 0.7); }
        }
        /* Game Cards Grid */
        .game-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
        .game-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.2);
            transition: var(--transition);
            position: relative;
        }
        .game-card:hover {
            transform: translateY(-8px);
            border-color: var(--accent-cyan);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.3);
        }
        .game-card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
            display: flex;
            align-items: flex-start;
            justify-content: flex-start;
            padding: 16px;
        }
        .game-card-body {
            padding: 20px;
        }
        .game-card-body h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--text-white);
        }
        .game-card-body p {
            font-size: 14px;
            color: var(--text-silver);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .game-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .game-card-rating {
            color: #FFD700;
            font-size: 13px;
            font-weight: 600;
        }
        /* List Section */
        .info-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 30px;
        }
        .info-item {
            display: flex;
            gap: 16px;
            padding: 20px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-md);
            border-left: 3px solid var(--accent-cyan);
            transition: var(--transition);
        }
        .info-item:hover {
            background: rgba(0, 240, 255, 0.05);
            transform: translateX(5px);
        }
        .info-item-icon {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 22px;
        }
        .info-item-content h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-white);
        }
        .info-item-content p {
            font-size: 14px;
            color: var(--text-silver);
            line-height: 1.6;
        }
        /* Featured Post List */
        .post-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 12px;
            margin-top: 30px;
        }
        .post-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-md);
            transition: var(--transition);
            border-left: 3px solid transparent;
        }
        .post-item:hover {
            background: rgba(0, 240, 255, 0.05);
            border-left-color: var(--accent-cyan);
            transform: translateX(5px);
        }
        .post-item-number {
            font-size: 28px;
            font-weight: 900;
            color: rgba(0, 240, 255, 0.3);
            min-width: 50px;
            text-align: center;
        }
        .post-item-content {
            flex: 1;
        }
        .post-item-content h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-white);
            line-height: 1.4;
        }
        .post-item-content p {
            font-size: 13px;
            color: var(--text-silver);
        }
        .post-item-meta {
            display: flex;
            gap: 15px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .post-item-meta i {
            margin-right: 5px;
        }
        /* Topic Tags */
        .topic-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 30px;
        }
        .topic-tag {
            padding: 10px 20px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-silver);
            transition: var(--transition);
            cursor: pointer;
        }
        .topic-tag:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }
        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin-top: 30px;
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
        }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-size: 16px;
            font-weight: 700;
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 15px;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--accent-cyan);
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-silver);
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
        }
        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08) 0%, rgba(204, 255, 0, 0.05) 100%);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: center;
        }
        .cta-section h2 {
            font-size: clamp(24px, 3.5vw, 36px);
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-white);
        }
        .cta-section p {
            font-size: 16px;
            color: var(--text-silver);
            max-width: 600px;
            margin: 0 auto 30px;
            line-height: 1.7;
        }
        /* Footer */
        .site-footer {
            background: rgba(15, 12, 32, 0.95);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 22px;
            font-weight: 900;
            margin-bottom: 12px;
            color: var(--text-white);
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-silver);
            line-height: 1.7;
            max-width: 400px;
        }
        .footer-links h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-white);
        }
        .footer-links a {
            display: block;
            font-size: 14px;
            color: var(--text-silver);
            margin-bottom: 10px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
            transform: translateX(5px);
        }
        .footer-bottom {
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-payments {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .payment-badge {
            padding: 8px 16px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-silver);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .section { padding: 60px 0; }
            .info-list { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .header-inner { flex-wrap: wrap; }
            .nav-toggle { display: flex; }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 4px;
                padding: 16px 0;
                background: rgba(15, 12, 32, 0.98);
                border-radius: var(--radius-md);
            }
            .main-nav.open { display: flex; }
            .main-nav a { width: 100%; text-align: center; }
            .header-actions { gap: 8px; }
            .btn-login { padding: 8px 12px; font-size: 13px; }
            .btn-signup { padding: 10px 18px; font-size: 13px; }
            .hero { padding: 130px 0 60px; }
            .hero h1 { font-size: 28px; }
            .hero p { font-size: 16px; }
            .hero-stats { gap: 20px; }
            .hero-stat strong { font-size: 24px; }
            .game-grid { grid-template-columns: 1fr; }
            .cta-section { padding: 35px 25px; }
            .footer-grid { grid-template-columns: 1fr; gap: 30px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .fab-left { left: 15px; bottom: 80px; width: 48px; height: 48px; }
            .fab-left i { font-size: 20px; }
            .logo-text strong { font-size: 15px; }
            .logo-text span { font-size: 10px; }
        }
        @media (max-width: 520px) {
            .container-wide, .container-narrow { padding: 0 15px; }
            .section { padding: 40px 0; }
            .hero { padding: 120px 0 40px; }
            .hero-cta { flex-direction: column; }
            .hero-cta .btn { width: 100%; }
            .hero-stats { gap: 15px; }
            .post-item { flex-direction: column; align-items: flex-start; }
            .post-item-number { font-size: 22px; min-width: auto; }
        }

/* roulang page: category1 */
:root {
            --primary: #0A2E1C;
            --primary-light: #123E25;
            --accent-gold: #FFD700;
            --accent-red: #D32F2F;
            --text-white: #FFFFFF;
            --text-mint: #D1F2EB;
            --border-gold: #FFD700;
            --bg-dark: #062315;
            --bg-card: #0F3522;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
            --shadow-gold: 0 4px 20px rgba(255,215,0,0.25);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-main: 'Be Vietnam Pro', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background: var(--primary);
            color: var(--text-white);
            line-height: 1.6;
            -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: var(--transition);
        }

        button {
            cursor: pointer;
            font-family: var(--font-main);
            border: none;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ========== HEADER ========== */
        .site-header {
            background: rgba(10, 46, 28, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.2);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 16px;
            flex-wrap: wrap;
        }

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

        .logo-icon {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-gold), #FF9F00);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            box-shadow: var(--shadow-gold);
            transition: var(--transition);
        }

        .logo:hover .logo-icon {
            transform: rotate(15deg) scale(1.05);
            box-shadow: 0 6px 24px rgba(255,215,0,0.4);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .logo-text strong {
            font-size: 17px;
            font-weight: 800;
            color: var(--accent-gold);
            letter-spacing: -0.3px;
        }

        .logo-text span {
            font-size: 12px;
            font-weight: 500;
            color: var(--text-mint);
            letter-spacing: 0.3px;
        }

        .nav-toggle {
            display: none;
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,215,0,0.3);
            color: var(--accent-gold);
            width: 44px;
            height: 44px;
            border-radius: 10px;
            font-size: 20px;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(255,215,0,0.15);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .main-nav a {
            padding: 10px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-mint);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--accent-gold);
            background: rgba(255,215,0,0.08);
        }

        .main-nav a.active {
            color: var(--primary);
            background: var(--accent-gold);
            font-weight: 700;
            box-shadow: var(--shadow-gold);
        }

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

        .btn-login {
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: 50px;
            border: 1px solid rgba(255,255,255,0.25);
            transition: var(--transition);
        }

        .btn-login:hover {
            background: rgba(255,255,255,0.1);
            border-color: var(--accent-gold);
            color: var(--accent-gold);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-gold), #FF9F00);
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            padding: 10px 24px;
            border-radius: 50px;
            box-shadow: var(--shadow-gold);
            transition: var(--transition);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255,215,0,0.45);
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            background: linear-gradient(135deg, var(--bg-dark), var(--primary-light));
            padding: 60px 0 48px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(255,215,0,0.15);
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255,215,0,0.08), transparent 70%);
            pointer-events: none;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-mint);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--accent-gold);
            font-weight: 600;
        }

        .breadcrumb a:hover {
            text-decoration: underline;
        }

        .breadcrumb .separator {
            color: rgba(255,255,255,0.4);
        }

        .page-banner h1 {
            font-size: 40px;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: 16px;
            line-height: 1.25;
            letter-spacing: -0.5px;
        }

        .page-banner h1 .highlight {
            color: var(--accent-gold);
        }

        .page-banner .subtitle {
            font-size: 18px;
            color: var(--text-mint);
            max-width: 700px;
            line-height: 1.6;
            font-weight: 400;
        }

        /* ========== MAIN CONTENT ========== */
        .main-content {
            padding: 60px 0;
            background: var(--primary);
        }

        .content-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
        }

        .content-section {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 36px;
            border: 1px solid rgba(255,215,0,0.12);
            transition: var(--transition);
        }

        .content-section:hover {
            border-color: rgba(255,215,0,0.3);
            box-shadow: var(--shadow-md);
        }

        .content-section h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 20px;
            line-height: 1.3;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .content-section h2 .section-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(255,215,0,0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent-gold);
            flex-shrink: 0;
        }

        .content-section h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-white);
            margin: 24px 0 12px;
            line-height: 1.4;
        }

        .content-section p {
            font-size: 16px;
            color: var(--text-mint);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .content-section ul,
        .content-section ol {
            padding-left: 24px;
            margin-bottom: 16px;
        }

        .content-section li {
            font-size: 16px;
            color: var(--text-mint);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .content-section li strong {
            color: var(--accent-gold);
            font-weight: 600;
        }

        .content-section .highlight-box {
            background: rgba(255,215,0,0.08);
            border-left: 4px solid var(--accent-gold);
            padding: 18px 20px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 20px 0;
        }

        .content-section .highlight-box p {
            margin-bottom: 0;
            font-weight: 500;
            color: var(--text-white);
        }

        .content-section .cover-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin: 24px 0;
            border: 1px solid rgba(255,215,0,0.2);
        }

        .content-section .cover-image img {
            width: 100%;
            object-fit: cover;
        }

        /* ========== STEP CARDS ========== */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
            margin: 24px 0;
        }

        .step-card {
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid rgba(255,215,0,0.15);
            transition: var(--transition);
        }

        .step-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255,215,0,0.4);
            box-shadow: var(--shadow-gold);
        }

        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-gold), #FF9F00);
            color: var(--primary);
            font-weight: 800;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }

        .step-card h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-mint);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ========== TIPS LIST ========== */
        .tips-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
            margin: 24px 0;
        }

        .tip-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,215,0,0.12);
            transition: var(--transition);
        }

        .tip-item:hover {
            border-color: rgba(255,215,0,0.35);
            background: rgba(255,255,255,0.06);
        }

        .tip-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(255,215,0,0.12);
            color: var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .tip-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 6px;
        }

        .tip-content p {
            font-size: 14px;
            color: var(--text-mint);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ========== FAQ ========== */
        .faq-list {
            margin: 24px 0;
        }

        .faq-item {
            border-bottom: 1px solid rgba(255,215,0,0.15);
            padding: 20px 0;
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-question {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
            cursor: pointer;
        }

        .faq-question .faq-icon {
            color: var(--accent-gold);
            font-size: 16px;
            flex-shrink: 0;
        }

        .faq-answer {
            font-size: 15px;
            color: var(--text-mint);
            line-height: 1.7;
            padding-left: 26px;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-light), var(--bg-dark));
            border-radius: var(--radius-lg);
            padding: 48px 36px;
            text-align: center;
            border: 1px solid rgba(255,215,0,0.3);
            position: relative;
            overflow: hidden;
            margin-top: 40px;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255,215,0,0.1), transparent 70%);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 900;
            color: var(--accent-gold);
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 17px;
            color: var(--text-mint);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }

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

        .btn-cta-primary {
            background: linear-gradient(135deg, var(--accent-gold), #FF9F00);
            color: var(--primary);
            font-weight: 700;
            font-size: 16px;
            padding: 16px 36px;
            border-radius: 50px;
            box-shadow: var(--shadow-gold);
            transition: var(--transition);
        }

        .btn-cta-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(255,215,0,0.5);
        }

        .btn-cta-secondary {
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 16px;
            padding: 16px 36px;
            border-radius: 50px;
            border: 1px solid rgba(255,255,255,0.3);
            transition: var(--transition);
        }

        .btn-cta-secondary:hover {
            background: rgba(255,255,255,0.08);
            border-color: var(--accent-gold);
            color: var(--accent-gold);
        }

        /* ========== FAB ========== */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 90;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #1A1A1A, #0D0D0D);
            border: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 22px;
            box-shadow: 0 4px 20px rgba(255,215,0,0.3);
            transition: var(--transition);
            opacity: 0.7;
            animation: fabFloat 3s ease-in-out infinite;
        }

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

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

        .fab .notification-dot {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #D32F2F;
            border: 2px solid #1A1A1A;
            animation: dotBlink 1.5s ease-in-out infinite;
        }

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

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

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid rgba(255,215,0,0.2);
            padding: 48px 0 24px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand h3 {
            font-size: 18px;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-mint);
            line-height: 1.6;
        }

        .footer-links h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .footer-links a {
            display: block;
            font-size: 14px;
            color: var(--text-mint);
            margin-bottom: 10px;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255,215,0,0.15);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-bottom span {
            font-size: 13px;
            color: var(--text-mint);
        }

        .footer-payments {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .payment-badge {
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,215,0,0.2);
            color: var(--text-white);
            font-size: 12px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 50px;
            transition: var(--transition);
        }

        .payment-badge:hover {
            background: rgba(255,215,0,0.12);
            border-color: var(--accent-gold);
            color: var(--accent-gold);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .main-nav {
                order: 3;
                width: 100%;
                justify-content: center;
                padding-top: 8px;
            }
            .page-banner h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: nowrap;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--primary);
                border-bottom: 1px solid rgba(255,215,0,0.2);
                flex-direction: column;
                padding: 16px 20px;
                gap: 4px;
                order: unset;
                width: 100%;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                width: 100%;
                text-align: left;
                padding: 12px 16px;
                border-radius: 10px;
            }
            .header-actions {
                margin-left: auto;
            }
            .btn-login {
                padding: 8px 16px;
                font-size: 13px;
            }
            .btn-signup {
                padding: 8px 16px;
                font-size: 13px;
            }
            .logo-text strong {
                font-size: 14px;
            }
            .logo-text span {
                font-size: 11px;
            }
            .logo-icon {
                width: 38px;
                height: 38px;
                font-size: 16px;
            }
            .page-banner {
                padding: 40px 0 32px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner .subtitle {
                font-size: 16px;
            }
            .main-content {
                padding: 40px 0;
            }
            .content-section {
                padding: 24px 20px;
            }
            .content-section h2 {
                font-size: 22px;
            }
            .step-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 36px 24px;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container-wide {
                padding: 0 16px;
            }
            .header-actions .btn-login {
                display: none;
            }
            .page-banner h1 {
                font-size: 24px;
            }
            .content-section {
                padding: 20px 16px;
            }
            .content-section h2 {
                font-size: 20px;
            }
            .content-section h3 {
                font-size: 18px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .cta-buttons {
                flex-direction: column;
            }
            .btn-cta-primary,
            .btn-cta-secondary {
                width: 100%;
                text-align: center;
            }
        }

/* roulang page: article */
:root {
            --primary-bg: #0F0C20;
            --secondary-bg: #0B1A30;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #6B7280;
            --border-neon: rgba(0, 240, 255, 0.3);
            --border-lime: rgba(204, 255, 0, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-neon: 0 0 20px rgba(0, 240, 255, 0.15);
            --shadow-lime: 0 0 20px rgba(204, 255, 0, 0.12);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --font-primary: 'Be Vietnam Pro', sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-2xl: 96px;
        }

        * {
            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-primary);
            background-color: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
        }

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

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        button {
            cursor: pointer;
            font-family: var(--font-primary);
            border: none;
            outline: none;
            transition: all 0.3s ease;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container-wide {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        .container-narrow {
            max-width: 720px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        /* ========== HEADER ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-neon);
            padding: 14px 0;
            transition: all 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-neon);
            padding: 10px 0;
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--text-white);
            transition: opacity 0.3s ease;
        }

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

        .logo-icon {
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-bg);
            font-size: 20px;
            flex-shrink: 0;
            box-shadow: var(--shadow-lime);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .logo-text strong {
            font-size: 17px;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.3px;
        }

        .logo-text span {
            font-size: 11px;
            color: var(--accent-cyan);
            font-weight: 500;
            letter-spacing: 0.3px;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 24px;
            padding: 8px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-neon);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .main-nav a {
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-silver);
            font-weight: 600;
            font-size: 14px;
            transition: all 0.3s ease;
            position: relative;
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.08);
        }

        .main-nav a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.12);
            box-shadow: inset 0 0 0 1px var(--border-neon);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), #00c8d4);
            color: var(--primary-bg);
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 14px;
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.35);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: var(--primary-bg);
        }

        /* ========== ARTICLE HERO ========== */
        .article-hero {
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            background: linear-gradient(180deg, rgba(11, 26, 48, 0.6) 0%, var(--primary-bg) 100%);
            border-bottom: 1px solid var(--border-neon);
            position: relative;
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-silver);
            margin-bottom: var(--spacing-md);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--accent-cyan);
            font-weight: 500;
        }

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

        .breadcrumb .separator {
            color: var(--text-muted);
        }

        .breadcrumb .current {
            color: var(--text-muted);
            font-weight: 500;
        }

        .article-hero h1 {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: var(--spacing-md);
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--text-white) 40%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-silver);
            padding-top: var(--spacing-sm);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .article-meta .meta-item i {
            color: var(--accent-cyan);
            font-size: 14px;
        }

        .article-meta .category-badge {
            background: rgba(204, 255, 0, 0.15);
            color: var(--accent-lime);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 12px;
            border: 1px solid var(--border-lime);
        }

        /* ========== ARTICLE BODY ========== */
        .article-body-section {
            padding: var(--spacing-xl) 0;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: var(--spacing-lg);
            align-items: start;
        }

        .article-main-content {
            min-width: 0;
        }

        .article-content {
            font-size: 17px;
            line-height: 1.75;
            color: var(--text-silver);
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--text-white);
            margin: var(--spacing-lg) 0 var(--spacing-sm);
            letter-spacing: -0.3px;
            line-height: 1.3;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-white);
            margin: var(--spacing-md) 0 var(--spacing-xs);
            line-height: 1.4;
        }

        .article-content p {
            margin-bottom: var(--spacing-md);
        }

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

        .article-content li {
            margin-bottom: var(--spacing-xs);
            position: relative;
        }

        .article-content ul li::marker {
            color: var(--accent-cyan);
        }

        .article-content ol li::marker {
            color: var(--accent-lime);
            font-weight: 700;
        }

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

        .article-content blockquote {
            background: rgba(0, 240, 255, 0.06);
            border-left: 4px solid var(--accent-cyan);
            padding: var(--spacing-md);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: var(--spacing-md) 0;
            color: var(--text-white);
            font-style: italic;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: var(--spacing-md) 0;
            box-shadow: var(--shadow-card);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: var(--spacing-md) 0;
            font-size: 15px;
        }

        .article-content table th {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            font-weight: 700;
            padding: 12px;
            text-align: left;
            border: 1px solid var(--border-neon);
        }

        .article-content table td {
            padding: 12px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--text-silver);
        }

        .article-content table tr:nth-child(even) {
            background: rgba(255, 255, 255, 0.02);
        }

        .article-not-found {
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-md);
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-neon);
        }

        .article-not-found i {
            font-size: 48px;
            color: var(--text-muted);
            margin-bottom: var(--spacing-md);
        }

        .article-not-found h2 {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
        }

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

        .article-not-found .btn-back {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-cyan), #00c8d4);
            color: var(--primary-bg);
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .article-not-found .btn-back:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.4);
            color: var(--primary-bg);
        }

        /* ========== ARTICLE SIDEBAR ========== */
        .article-sidebar {
            position: sticky;
            top: 90px;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .sidebar-widget {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
        }

        .sidebar-widget h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-widget h4 i {
            color: var(--accent-cyan);
        }

        .sidebar-widget ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-widget ul li {
            margin-bottom: 10px;
        }

        .sidebar-widget ul li a {
            color: var(--text-silver);
            font-size: 14px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s ease;
            padding: 6px 0;
        }

        .sidebar-widget ul li a:hover {
            color: var(--accent-cyan);
            transform: translateX(4px);
        }

        .sidebar-widget ul li a i {
            font-size: 12px;
            color: var(--accent-lime);
        }

        .sidebar-cta {
            background: linear-gradient(135deg, rgba(204, 255, 0, 0.1), rgba(0, 240, 255, 0.1));
            border: 1px solid var(--border-lime);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            text-align: center;
        }

        .sidebar-cta h4 {
            font-size: 18px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 8px;
        }

        .sidebar-cta p {
            font-size: 13px;
            color: var(--text-silver);
            margin-bottom: var(--spacing-sm);
        }

        .sidebar-cta .btn-cta {
            display: block;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: var(--primary-bg);
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            text-decoration: none;
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .sidebar-cta .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(204, 255, 0, 0.35);
            color: var(--primary-bg);
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: var(--spacing-xl) 0;
            background: linear-gradient(135deg, rgba(11, 26, 48, 0.8), rgba(15, 12, 32, 0.95));
            border-top: 1px solid var(--border-neon);
            border-bottom: 1px solid var(--border-neon);
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(204, 255, 0, 0.08));
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            font-size: 16px;
            color: var(--text-silver);
            max-width: 560px;
            margin: 0 auto var(--spacing-md);
            position: relative;
            z-index: 1;
        }

        .cta-box .btn-primary {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: var(--primary-bg);
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 800;
            font-size: 16px;
            text-decoration: none;
            box-shadow: 0 8px 28px rgba(204, 255, 0, 0.3);
            transition: all 0.3s ease;
            position: relative;
            z-index: 1;
        }

        .cta-box .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 240, 255, 0.45);
            color: var(--primary-bg);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-neon);
            padding: var(--spacing-xl) 0 var(--spacing-md);
        }

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

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            line-height: 1.3;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-silver);
            line-height: 1.7;
        }

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

        .footer-links a {
            display: block;
            color: var(--text-silver);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 10px;
            transition: all 0.3s ease;
        }

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

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

        .footer-bottom span {
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-payments {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .payment-badge {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-silver);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, 0.12);
            transition: all 0.3s ease;
        }

        .payment-badge:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--border-neon);
            color: var(--accent-cyan);
        }

        /* ========== FAB ========== */
        .fab-neon {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 56px;
            height: 56px;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 22px;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            transition: all 0.3s ease;
            opacity: 0.7;
            position: relative;
            overflow: hidden;
        }

        .fab-neon::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            z-index: -1;
            animation: borderRotate 3s linear infinite;
        }

        @keyframes borderRotate {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }

        .fab-neon:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.65);
            color: var(--accent-lime);
        }

        .fab-neon .notification-dot {
            position: absolute;
            top: 8px;
            right: 8px;
            width: 10px;
            height: 10px;
            background: #FF007F;
            border-radius: 50%;
            animation: blinkNeon 1.2s ease-in-out infinite;
            box-shadow: 0 0 8px rgba(255, 0, 127, 0.7);
        }

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

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

            .article-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }

            .sidebar-widget,
            .sidebar-cta {
                flex: 1 1 200px;
            }

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

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }

            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(15, 12, 32, 0.98);
                border-radius: var(--radius-md);
                padding: var(--spacing-sm);
                margin-top: var(--spacing-sm);
                border: 1px solid var(--border-neon);
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav a {
                width: 100%;
                text-align: left;
                padding: 12px 16px;
            }

            .header-actions {
                margin-left: auto;
            }

            .header-actions .btn-login,
            .header-actions .btn-signup {
                padding: 8px 16px;
                font-size: 13px;
            }

            .article-hero {
                padding: var(--spacing-lg) 0 var(--spacing-md);
            }

            .article-hero h1 {
                font-size: 26px;
            }

            .article-content {
                font-size: 16px;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 18px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

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

            .fab-neon {
                width: 48px;
                height: 48px;
                font-size: 18px;
                left: 12px;
                bottom: 80px;
            }
        }

        @media (max-width: 520px) {
            .container-wide,
            .container-narrow {
                padding: 0 var(--spacing-sm);
            }

            .logo-text strong {
                font-size: 15px;
            }

            .logo-text span {
                font-size: 10px;
            }

            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }

            .header-actions .btn-login {
                display: none;
            }

            .header-actions .btn-signup {
                padding: 8px 14px;
                font-size: 12px;
            }

            .article-hero h1 {
                font-size: 22px;
            }

            .article-meta {
                font-size: 12px;
                gap: var(--spacing-sm);
            }

            .article-content {
                font-size: 15px;
                line-height: 1.7;
            }

            .article-content h2 {
                font-size: 20px;
            }

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

            .sidebar-widget,
            .sidebar-cta {
                flex: 1 1 100%;
            }

            .cta-box {
                padding: var(--spacing-md);
            }

            .cta-box .btn-primary {
                padding: 12px 24px;
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0052FF;
            --primary-dark: #003BC2;
            --secondary: #00F0FF;
            --accent: #FF007F;
            --gold: #FFD700;
            --bg-dark: #08090F;
            --bg-card: #0D111E;
            --bg-card-hover: #111827;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #7B8494;
            --border-color: #1E2A45;
            --border-glow: #0052FF;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 20px rgba(0, 82, 255, 0.3);
            --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --container-wide: 1200px;
            --container-narrow: 860px;
        }

        * {
            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-main);
            background-color: var(--bg-dark);
            color: var(--text-white);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            transition: var(--transition);
        }

        .container-wide {
            max-width: var(--container-wide);
            margin: 0 auto;
            padding: 0 20px;
        }

        .container-narrow {
            max-width: var(--container-narrow);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(30, 42, 69, 0.7);
            padding: 12px 0;
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
            background: rgba(8, 9, 15, 0.98);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            flex-wrap: nowrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
            text-decoration: none;
        }

        .logo-icon {
            width: 46px;
            height: 46px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
            transition: var(--transition);
        }

        .logo:hover .logo-icon {
            transform: scale(1.08);
            box-shadow: 0 0 26px rgba(0, 240, 255, 0.5);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .logo-text strong {
            font-size: 17px;
            font-weight: 800;
            letter-spacing: 0.3px;
            color: #fff;
        }

        .logo-text span {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 400;
            letter-spacing: 0.4px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .main-nav a {
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-silver);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: #fff;
            background: rgba(0, 82, 255, 0.15);
        }

        .main-nav a.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.3), rgba(0, 240, 255, 0.2));
            box-shadow: inset 0 0 0 1px rgba(0, 240, 255, 0.3);
        }

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

        .btn-login,
        .btn-signup {
            padding: 9px 20px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 700;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-login {
            color: var(--text-silver);
            background: transparent;
            border: 1px solid rgba(203, 213, 225, 0.25);
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--primary), #0066FF);
            color: #fff;
            border: 1px solid rgba(0, 240, 255, 0.4);
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.35);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 26px rgba(0, 82, 255, 0.5);
            background: linear-gradient(135deg, #0066FF, #0088FF);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(0, 82, 255, 0.2);
            color: #fff;
            font-size: 20px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(0, 240, 255, 0.3);
            flex-shrink: 0;
        }

        /* Hero */
        .page-hero {
            position: relative;
            padding: 150px 0 80px;
            background: linear-gradient(160deg, #08090F 0%, #0D111E 45%, #0A1A35 100%);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.18), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.12), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
            position: relative;
            z-index: 2;
            flex-wrap: wrap;
        }

        .hero-breadcrumb a {
            color: var(--secondary);
            font-weight: 500;
        }

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

        .hero-breadcrumb .separator {
            color: var(--text-muted);
        }

        .hero-breadcrumb .current {
            color: var(--text-silver);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--secondary);
            padding: 7px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 22px;
            letter-spacing: 0.4px;
        }

        .hero-badge i {
            font-size: 14px;
        }

        .hero-content h1 {
            font-size: clamp(32px, 5vw, 48px);
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #FFFFFF 40%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content .hero-sub {
            font-size: 17px;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: 30px;
            max-width: 620px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary), #0066FF);
            color: #fff;
            padding: 14px 30px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 700;
            box-shadow: 0 6px 24px rgba(0, 82, 255, 0.4);
            border: 1px solid rgba(0, 240, 255, 0.3);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 34px rgba(0, 82, 255, 0.55);
            background: linear-gradient(135deg, #0066FF, #0088FF);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-silver);
            padding: 14px 28px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            border: 1px solid rgba(203, 213, 225, 0.3);
            transition: var(--transition);
        }

        .btn-outline:hover {
            color: #fff;
            border-color: var(--secondary);
            background: rgba(0, 240, 255, 0.08);
            transform: translateY(-2px);
        }

        /* Section common */
        .section {
            padding: 70px 0;
            position: relative;
        }

        .section-alt {
            background: #0A0D16;
            border-top: 1px solid rgba(30, 42, 69, 0.5);
            border-bottom: 1px solid rgba(30, 42, 69, 0.5);
        }

        .section-header {
            margin-bottom: 42px;
            max-width: 680px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--secondary);
            margin-bottom: 14px;
        }

        .section-tag::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
        }

        .section-header h2 {
            font-size: clamp(26px, 4vw, 36px);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 14px;
            color: #fff;
            letter-spacing: -0.3px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Content layout */
        .content-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 40px;
            align-items: start;
        }

        .content-main {
            min-width: 0;
        }

        .content-sidebar {
            position: sticky;
            top: 100px;
            display: flex;
            flex-direction: column;
            gap: 22px;
        }

        /* Guide steps */
        .guide-steps {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .guide-step {
            display: flex;
            gap: 22px;
            align-items: flex-start;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 26px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .guide-step::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }

        .guide-step:hover {
            border-color: rgba(0, 240, 255, 0.4);
            background: var(--bg-card-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .guide-step:hover::before {
            opacity: 1;
        }

        .step-number {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.25);
        }

        .step-content h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
            letter-spacing: -0.2px;
        }

        .step-content p {
            font-size: 15px;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .step-content ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .step-content ul li {
            font-size: 14px;
            color: var(--text-muted);
            padding-left: 22px;
            position: relative;
        }

        .step-content ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--secondary);
            font-size: 12px;
        }

        /* Tips cards */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .tip-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 22px;
            transition: var(--transition);
        }

        .tip-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--shadow-card);
            transform: translateY(-3px);
        }

        .tip-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary);
            font-size: 20px;
            margin-bottom: 16px;
        }

        .tip-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: #fff;
        }

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

        /* Sidebar widgets */
        .sidebar-widget {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 22px;
        }

        .sidebar-widget h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-widget h4 i {
            color: var(--secondary);
            font-size: 16px;
        }

        .sidebar-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-list li a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-silver);
            padding: 10px 14px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .sidebar-list li a:hover {
            background: rgba(0, 82, 255, 0.15);
            color: #fff;
            padding-left: 18px;
        }

        .sidebar-list li a i {
            color: var(--secondary);
            font-size: 12px;
            width: 16px;
            text-align: center;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

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

        .faq-item.active {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            text-align: left;
            transition: var(--transition);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary);
            font-size: 12px;
            transition: var(--transition);
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            background: rgba(0, 240, 255, 0.2);
        }

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

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            border-top: 1px solid rgba(30, 42, 69, 0.5);
            padding-top: 16px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #0D111E 0%, #0A1A35 100%);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 70px 0;
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.08));
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.12), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: clamp(26px, 4vw, 34px);
            font-weight: 800;
            margin-bottom: 16px;
            color: #fff;
            position: relative;
            z-index: 2;
        }

        .cta-box p {
            font-size: 16px;
            color: var(--text-silver);
            line-height: 1.7;
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 2;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        /* Footer */
        .site-footer {
            background: #060810;
            border-top: 1px solid rgba(30, 42, 69, 0.6);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 14px;
            color: #fff;
            line-height: 1.4;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-links h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
        }

        .footer-links a {
            display: block;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
            transition: var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 22px;
            border-top: 1px solid rgba(30, 42, 69, 0.5);
        }

        .footer-bottom span {
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-payments {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .payment-badge {
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 11px;
            font-weight: 700;
            color: var(--text-silver);
            background: rgba(0, 82, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.2);
            letter-spacing: 0.5px;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 90px;
            z-index: 900;
            width: 54px;
            height: 54px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.85), rgba(8, 9, 15, 0.85)), linear-gradient(135deg, var(--secondary), var(--primary));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary);
            font-size: 22px;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
            transition: var(--transition);
            opacity: 0.75;
            animation: fabBreath 3s ease-in-out infinite;
        }

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

        .fab-left:active {
            transform: scale(0.95);
            color: var(--accent);
        }

        @keyframes fabBreath {
            0%, 100% {
                box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
            }
            50% {
                box-shadow: 0 0 32px rgba(0, 240, 255, 0.55);
            }
        }

        /* Image showcase */
        .image-showcase {
            margin: 30px 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }

        .image-showcase img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        /* Data highlights */
        .data-highlights {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
            margin: 30px 0;
        }

        .data-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            text-align: center;
            transition: var(--transition);
        }

        .data-item:hover {
            border-color: rgba(0, 240, 255, 0.35);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card);
        }

        .data-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 6px;
        }

        .data-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

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

            .content-sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-110%);
                transition: transform 0.3s ease;
                z-index: 999;
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .main-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 15px;
            }

            .header-actions {
                gap: 6px;
            }

            .btn-login,
            .btn-signup {
                padding: 8px 14px;
                font-size: 12px;
            }

            .page-hero {
                padding: 120px 0 60px;
            }

            .section {
                padding: 50px 0;
            }

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

            .data-highlights {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }

            .data-number {
                font-size: 22px;
            }

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

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

            .cta-box {
                padding: 36px 24px;
            }

            .guide-step {
                flex-direction: column;
                gap: 14px;
                padding: 22px 18px;
            }

            .step-number {
                width: 44px;
                height: 44px;
                font-size: 17px;
                border-radius: 10px;
            }
        }

        @media (max-width: 520px) {
            .logo-text span {
                display: none;
            }

            .logo-icon {
                width: 40px;
                height: 40px;
                font-size: 17px;
                border-radius: 10px;
            }

            .logo-text strong {
                font-size: 14px;
            }

            .header-actions .btn-login {
                display: none;
            }

            .header-actions .btn-signup {
                padding: 7px 12px;
                font-size: 11px;
            }

            .data-highlights {
                grid-template-columns: 1fr;
            }

            .hero-content h1 {
                font-size: 28px;
            }

            .hero-actions {
                flex-direction: column;
            }

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

            .fab-left {
                left: 14px;
                bottom: 70px;
                width: 48px;
                height: 48px;
                font-size: 18px;
            }

            .image-showcase img {
                height: 220px;
            }
        }