/* roulang page: index */
:root {
            --bg-primary: #0A2E1C;
            --bg-secondary: #123E25;
            --bg-card: #0E3521;
            --bg-dark: #072115;
            --accent-gold: #FFD700;
            --accent-red: #D32F2F;
            --text-white: #FFFFFF;
            --text-pale: #D1F2EB;
            --text-muted: #8FB8A8;
            --border-gold: rgba(255, 215, 0, 0.45);
            --border-gold-soft: rgba(255, 215, 0, 0.22);
            --shadow-gold: 0 8px 30px rgba(255, 215, 0, 0.12);
            --shadow-deep: 0 20px 50px rgba(0, 0, 0, 0.45);
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 26px;
            --radius-xl: 34px;
            --font-sans: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --container-max: 1240px;
            --transition-fast: 0.22s ease;
            --transition-smooth: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-white);
            line-height: 1.6;
            font-size: 16px;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== NAVBAR ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-gold-soft);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(7, 33, 21, 0.97);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.38);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--accent-gold);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent-gold), #B8860B);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-dark);
            font-size: 1.25rem;
            flex-shrink: 0;
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
        }

        .nav-logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.15;
        }

        .nav-logo-main {
            font-size: 1.05rem;
            font-weight: 800;
            color: #fff;
        }

        .nav-logo-sub {
            font-size: 0.68rem;
            font-weight: 500;
            color: var(--accent-gold);
            letter-spacing: 0.04em;
        }

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

        .nav-link {
            padding: 10px 18px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--text-pale);
            transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
            position: relative;
        }

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

        .nav-link.active {
            color: var(--bg-dark);
            background: linear-gradient(135deg, var(--accent-gold), #E6B800);
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.28);
        }

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

        .btn-login {
            padding: 10px 20px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--accent-gold);
            background: transparent;
            border: 1.5px solid var(--border-gold);
            transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(255, 215, 0, 0.1);
            box-shadow: 0 0 18px rgba(255, 215, 0, 0.22);
        }

        .btn-signup {
            padding: 11px 26px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--bg-dark);
            background: linear-gradient(135deg, var(--accent-gold), #FFC107);
            box-shadow: 0 6px 22px rgba(255, 215, 0, 0.32);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(255, 215, 0, 0.42);
            background: linear-gradient(135deg, #FFD700, #FFB300);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-gold-soft);
            color: var(--accent-gold);
            font-size: 1.3rem;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(255, 215, 0, 0.18);
        }

        /* ===== HERO ===== */
        .hero {
            padding: 150px 0 90px;
            background: linear-gradient(165deg, var(--bg-dark) 0%, var(--bg-primary) 42%, var(--bg-secondary) 100%);
            position: relative;
            overflow: hidden;
            min-height: 90vh;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(circle at 18% 30%, rgba(255, 215, 0, 0.08) 0%, transparent 42%),
                radial-gradient(circle at 88% 72%, rgba(211, 47, 47, 0.12) 0%, transparent 40%);
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 60px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 8px 18px;
            border-radius: 999px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid var(--border-gold);
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.03em;
            margin-bottom: 24px;
        }

        .hero-tag i {
            color: var(--accent-red);
        }

        .hero h1 {
            font-size: clamp(2.2rem, 4.8vw, 3.8rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.01em;
            color: #fff;
            margin-bottom: 22px;
        }

        .hero h1 .highlight-gold {
            color: var(--accent-gold);
            position: relative;
        }

        .hero h1 .highlight-red {
            color: var(--accent-red);
        }

        .hero-desc {
            font-size: 1.08rem;
            line-height: 1.7;
            color: var(--text-pale);
            max-width: 580px;
            margin-bottom: 34px;
        }

        .hero-cta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 38px;
        }

        .btn-hero-primary {
            padding: 16px 38px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 1.02rem;
            color: var(--bg-dark);
            background: linear-gradient(135deg, var(--accent-gold), #FFC107);
            box-shadow: 0 10px 34px rgba(255, 215, 0, 0.38);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-hero-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 44px rgba(255, 215, 0, 0.5);
        }

        .btn-hero-secondary {
            padding: 16px 32px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--accent-gold);
            background: transparent;
            border: 2px solid var(--border-gold);
            transition: background var(--transition-fast), transform var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-hero-secondary:hover {
            background: rgba(255, 215, 0, 0.08);
            transform: translateY(-3px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 34px;
        }

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

        .hero-stat-number {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--accent-gold);
            line-height: 1.1;
        }

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

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

        .hero-visual-ring {
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: radial-gradient(circle at 35% 30%, rgba(255, 215, 0, 0.22), rgba(10, 46, 28, 0.9) 65%);
            border: 2px solid var(--border-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            box-shadow: 0 0 70px rgba(255, 215, 0, 0.18), inset 0 0 50px rgba(255, 215, 0, 0.06);
            animation: floatSlow 6s ease-in-out infinite;
        }

        @keyframes floatSlow {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-14px); }
        }

        .hero-visual-ring img {
            width: 72%;
            height: 72%;
            object-fit: contain;
            border-radius: 50%;
        }

        .hero-badge {
            position: absolute;
            top: 18px;
            right: 8px;
            background: var(--accent-red);
            color: #fff;
            padding: 8px 16px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.8rem;
            letter-spacing: 0.04em;
            box-shadow: 0 6px 20px rgba(211, 47, 47, 0.45);
            animation: pulseRed 2s ease-in-out infinite;
        }

        @keyframes pulseRed {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.06); }
        }

        .hero-countdown {
            display: flex;
            gap: 14px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .hero-countdown-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-gold-soft);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            min-width: 72px;
            text-align: center;
            backdrop-filter: blur(8px);
        }

        .hero-countdown-number {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-gold);
            line-height: 1.1;
        }

        .hero-countdown-label {
            font-size: 0.72rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-top: 4px;
        }

        /* ===== SECTION BASE ===== */
        .section {
            padding: 76px 0;
            position: relative;
        }

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

        .section-header {
            margin-bottom: 44px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
        }

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

        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-gold-soft);
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.8rem;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: clamp(1.7rem, 3.2vw, 2.4rem);
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 1rem;
            line-height: 1.65;
            color: var(--text-pale);
            max-width: 640px;
            margin-top: 14px;
        }

        .section-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.92rem;
            transition: gap var(--transition-fast);
        }

        .section-link:hover {
            gap: 14px;
        }

        /* ===== PROMO GRID ===== */
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .promo-card {
            background: var(--bg-card);
            border: 1px solid var(--border-gold-soft);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-fast);
            position: relative;
            overflow: hidden;
        }

        .promo-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-gold), #FFC107, var(--accent-gold));
            opacity: 0;
            transition: opacity var(--transition-fast);
        }

        .promo-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-gold), var(--shadow-deep);
            border-color: var(--border-gold);
        }

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

        .promo-icon {
            width: 58px;
            height: 58px;
            border-radius: 16px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-gold-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.5rem;
            margin-bottom: 20px;
            transition: background var(--transition-fast), transform var(--transition-fast);
        }

        .promo-card:hover .promo-icon {
            background: rgba(255, 215, 0, 0.18);
            transform: scale(1.06);
        }

        .promo-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .promo-card p {
            font-size: 0.93rem;
            color: var(--text-pale);
            line-height: 1.65;
            margin-bottom: 18px;
        }

        .promo-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            background: rgba(211, 47, 47, 0.15);
            color: #FF6B6B;
            border: 1px solid rgba(211, 47, 47, 0.3);
        }

        .promo-tag.gold {
            background: rgba(255, 215, 0, 0.12);
            color: var(--accent-gold);
            border-color: var(--border-gold-soft);
        }

        /* ===== GAME TRACK ===== */
        .game-track {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .game-card {
            background: var(--bg-card);
            border: 1px solid var(--border-gold-soft);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-fast);
            cursor: pointer;
            position: relative;
        }

        .game-card:hover {
            transform: translateY(-6px) scale(1.01);
            box-shadow: var(--shadow-gold), 0 14px 34px rgba(0, 0, 0, 0.4);
            border-color: var(--border-gold);
        }

        .game-card-img {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
        }

        .game-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .game-card:hover .game-card-img img {
            transform: scale(1.08);
        }

        .game-card-badge {
            position: absolute;
            top: 12px;
            right: 12px;
            padding: 5px 12px;
            border-radius: 999px;
            background: var(--accent-red);
            color: #fff;
            font-weight: 700;
            font-size: 0.72rem;
            letter-spacing: 0.04em;
            box-shadow: 0 4px 14px rgba(211, 47, 47, 0.4);
        }

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

        .game-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .game-card-body p {
            font-size: 0.84rem;
            color: var(--text-muted);
        }

        /* ===== CONTENT LIST SECTION ===== */
        .content-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 38px;
            align-items: start;
        }

        .content-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .content-list-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-gold-soft);
            border-radius: var(--radius-md);
            transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
        }

        .content-list-item:hover {
            border-color: var(--border-gold);
            background: rgba(255, 215, 0, 0.05);
            transform: translateX(6px);
        }

        .content-list-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: rgba(255, 215, 0, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

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

        .content-list-info h4 {
            font-size: 0.98rem;
            font-weight: 600;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 4px;
        }

        .content-list-info .meta {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .content-sidebar {
            background: var(--bg-card);
            border: 1px solid var(--border-gold-soft);
            border-radius: var(--radius-lg);
            padding: 30px;
        }

        .content-sidebar h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .sidebar-list-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.04);
            transition: background var(--transition-fast);
        }

        .sidebar-list-item:hover {
            background: rgba(255, 215, 0, 0.08);
        }

        .sidebar-list-item img {
            width: 52px;
            height: 52px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .sidebar-list-item .info h4 {
            font-size: 0.88rem;
            font-weight: 600;
            color: #fff;
            line-height: 1.3;
        }

        .sidebar-list-item .info .meta {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ===== STEPS ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-gold-soft);
            border-radius: var(--radius-lg);
            padding: 30px 26px;
            transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
            position: relative;
        }

        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-gold);
        }

        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-gold), #B8860B);
            color: var(--bg-dark);
            font-weight: 800;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            box-shadow: 0 6px 20px rgba(255, 215, 0, 0.3);
        }

        .step-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

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

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 860px;
        }

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

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

        .faq-question {
            width: 100%;
            padding: 22px 26px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            text-align: left;
            transition: color var(--transition-fast);
        }

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

        .faq-question i {
            color: var(--accent-gold);
            font-size: 0.9rem;
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            padding: 0 26px;
            color: var(--text-pale);
            font-size: 0.92rem;
            line-height: 1.65;
        }

        .faq-item.open .faq-answer {
            max-height: 320px;
            padding: 0 26px 22px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
        }

        .cta-box {
            background: linear-gradient(135deg, var(--bg-secondary), var(--bg-dark));
            border: 1.5px solid var(--border-gold);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -30%;
            width: 60%;
            height: 200%;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.1), transparent 65%);
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: clamp(1.7rem, 3vw, 2.4rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            font-size: 1.05rem;
            color: var(--text-pale);
            max-width: 580px;
            margin: 0 auto 30px;
            line-height: 1.65;
            position: relative;
            z-index: 1;
        }

        .btn-cta-large {
            padding: 18px 48px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--bg-dark);
            background: linear-gradient(135deg, var(--accent-gold), #FFC107);
            box-shadow: 0 12px 38px rgba(255, 215, 0, 0.4);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 12px;
            position: relative;
            z-index: 1;
        }

        .btn-cta-large:hover {
            transform: translateY(-4px);
            box-shadow: 0 18px 50px rgba(255, 215, 0, 0.52);
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-gold-soft);
            padding: 60px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-top: 16px;
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            font-size: 0.88rem;
            color: var(--text-pale);
            transition: color var(--transition-fast), padding-left var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-gold-soft);
            padding-top: 26px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .footer-badges {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .footer-badge {
            padding: 6px 14px;
            border-radius: 999px;
            border: 1px solid var(--border-gold-soft);
            font-size: 0.72rem;
            color: var(--accent-gold);
            font-weight: 600;
        }

        /* ===== FAB ===== */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 58px;
            height: 58px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--bg-dark), var(--bg-secondary));
            border: 2px solid var(--accent-gold);
            color: var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            opacity: 0.7;
            animation: floatFab 4s ease-in-out infinite;
            transition: transform var(--transition-fast), opacity var(--transition-fast), box-shadow var(--transition-fast);
            cursor: pointer;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 30px rgba(255, 215, 0, 0.45);
        }

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

        .fab-left .notification-dot {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #FF0040;
            border: 2px solid var(--bg-dark);
            animation: pulseDot 1.8s ease-in-out infinite;
        }

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

        @keyframes pulseDot {
            0%, 100% { transform: scale(1); opacity: 1; }
            50% { transform: scale(1.25); opacity: 0.7; }
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 44px;
            }
            .hero {
                padding: 130px 0 70px;
                min-height: auto;
            }
            .hero-visual-ring {
                width: 300px;
                height: 300px;
            }
            .promo-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .game-track {
                grid-template-columns: repeat(3, 1fr);
            }
            .content-layout {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 74px;
                left: 0;
                right: 0;
                background: rgba(7, 33, 21, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px;
                gap: 10px;
                border-bottom: 1px solid var(--border-gold-soft);
                transform: translateY(-120%);
                transition: transform var(--transition-smooth);
                z-index: 999;
            }
            .nav-menu.open {
                transform: translateY(0);
            }
            .nav-link {
                width: 100%;
                text-align: center;
                padding: 14px 18px;
                font-size: 1rem;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-actions .btn-login {
                display: none;
            }
            .nav-actions {
                gap: 8px;
            }
            .nav-inner {
                height: 64px;
            }
            .nav-logo-main {
                font-size: 0.9rem;
            }
            .nav-logo-sub {
                font-size: 0.58rem;
            }
            .hero {
                padding: 110px 0 50px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .hero-visual-ring {
                width: 240px;
                height: 240px;
            }
            .hero-badge {
                top: 6px;
                right: -10px;
                font-size: 0.7rem;
                padding: 6px 12px;
            }
            .hero-stats {
                gap: 22px;
            }
            .hero-stat-number {
                font-size: 1.3rem;
            }
            .promo-grid {
                grid-template-columns: 1fr;
            }
            .game-track {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 56px 0;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
            }
            .content-list-item {
                flex-direction: row;
                align-items: flex-start;
                gap: 14px;
                padding: 16px;
            }
            .content-list-icon {
                width: 40px;
                height: 40px;
                font-size: 0.95rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-box {
                padding: 40px 24px;
                border-radius: var(--radius-lg);
            }
            .btn-cta-large {
                padding: 15px 32px;
                font-size: 0.95rem;
            }
            .fab-left {
                width: 50px;
                height: 50px;
                bottom: 80px;
                left: 12px;
                font-size: 1.15rem;
            }
            .container {
                padding: 0 18px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero-cta-row {
                flex-direction: column;
                gap: 12px;
            }
            .btn-hero-primary,
            .btn-hero-secondary {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
                font-size: 0.92rem;
            }
            .game-track {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .game-card-body {
                padding: 14px;
            }
            .game-card-body h3 {
                font-size: 0.9rem;
            }
            .hero-countdown {
                gap: 8px;
            }
            .hero-countdown-item {
                min-width: 58px;
                padding: 10px 12px;
            }
            .hero-countdown-number {
                font-size: 1.2rem;
            }
            .hero-countdown-label {
                font-size: 0.6rem;
            }
            .promo-card {
                padding: 24px 20px;
            }
            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
            .btn-signup {
                padding: 9px 18px;
                font-size: 0.8rem;
            }
            .btn-login {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
        }

/* roulang page: article */
:root {
            --primary-bg: #0A2E1C;
            --secondary-bg: #123E25;
            --accent-gold: #FFD700;
            --accent-red: #D32F2F;
            --text-white: #FFFFFF;
            --text-pale: #D1F2EB;
            --text-muted: #A8C9BC;
            --border-gold: rgba(255, 215, 0, 0.35);
            --shadow-gold: 0 8px 30px rgba(255, 215, 0, 0.12);
            --shadow-dark: 0 12px 40px rgba(0, 0, 0, 0.4);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 1.5rem;
            --space-lg: 2.5rem;
            --space-xl: 4rem;
            --space-2xl: 6rem;
            --font-main: 'Be Vietnam Pro', system-ui, -apple-system, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

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

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

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

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

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

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

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

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

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header & Navigation */
        .site-header {
            background: rgba(10, 46, 28, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-gold);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 0.75rem 0;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
            min-width: 0;
        }

        .nav-logo-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--accent-gold), #FFC107);
            color: var(--primary-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            flex-shrink: 0;
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
        }

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

        .nav-logo-main {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--accent-gold);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .nav-logo-sub {
            font-size: 0.7rem;
            color: var(--text-pale);
            font-weight: 500;
            white-space: nowrap;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-link {
            color: var(--text-pale);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 600;
            padding: 0.5rem 0.9rem;
            border-radius: 999px;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }

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

        .nav-link.active {
            color: var(--primary-bg);
            background: var(--accent-gold);
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(255, 215, 0, 0.35);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }

        .btn-login,
        .btn-signup {
            padding: 0.55rem 1.25rem;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 700;
            white-space: nowrap;
            transition: var(--transition);
        }

        .btn-login {
            background: transparent;
            color: var(--text-pale);
            border: 1.5px solid rgba(209, 242, 235, 0.4);
        }

        .btn-login:hover {
            border-color: var(--accent-gold);
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.06);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-gold), #FFC107);
            color: var(--primary-bg);
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.35);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.45);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            color: var(--accent-gold);
            font-size: 1.4rem;
            padding: 0.4rem;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-gold);
        }

        /* Article Hero */
        .article-hero {
            padding: 4rem 0 3rem;
            background: radial-gradient(ellipse at top left, rgba(255, 215, 0, 0.1), transparent 60%),
                        radial-gradient(ellipse at bottom right, rgba(18, 62, 37, 0.9), transparent 50%);
            border-bottom: 1px solid var(--border-gold);
        }

        .article-hero-inner {
            max-width: 820px;
            margin: 0 auto;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }

        .article-breadcrumb a {
            color: var(--text-pale);
        }

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

        .article-breadcrumb .separator {
            color: var(--accent-gold);
            opacity: 0.6;
        }

        .article-hero h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-white);
            margin-bottom: 1.25rem;
            letter-spacing: -0.02em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            flex-wrap: wrap;
            padding-top: 1.25rem;
            border-top: 1px solid rgba(255, 215, 0, 0.2);
        }

        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .article-meta-item i {
            color: var(--accent-gold);
            font-size: 0.9rem;
        }

        .article-category-badge {
            display: inline-block;
            background: rgba(255, 215, 0, 0.15);
            color: var(--accent-gold);
            padding: 0.3rem 0.9rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 700;
            border: 1px solid var(--border-gold);
            letter-spacing: 0.02em;
        }

        /* Article Body */
        .article-body-section {
            padding: 3rem 0 4rem;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            align-items: start;
        }

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

        .article-featured-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 2rem;
            box-shadow: var(--shadow-dark);
            border: 1px solid var(--border-gold);
        }

        .article-featured-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }

        .article-content {
            color: var(--text-pale);
            font-size: 1rem;
            line-height: 1.7;
        }

        .article-content p {
            margin-bottom: 1.25rem;
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin: 2rem 0 1rem;
            letter-spacing: -0.01em;
        }

        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 1.5rem 0 0.75rem;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.25rem 1.5rem;
            color: var(--text-pale);
        }

        .article-content li {
            margin-bottom: 0.6rem;
        }

        .article-content a {
            color: var(--accent-gold);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--text-white);
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent-gold);
            background: rgba(255, 215, 0, 0.06);
            padding: 1.25rem 1.5rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 1.5rem 0;
            font-style: italic;
            color: var(--text-white);
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-dark);
        }

        .article-not-found {
            background: rgba(255, 215, 0, 0.06);
            border: 1px dashed var(--border-gold);
            border-radius: var(--radius-md);
            padding: 3rem 2rem;
            text-align: center;
            color: var(--text-pale);
        }

        .article-not-found i {
            font-size: 3rem;
            color: var(--accent-gold);
            margin-bottom: 1rem;
            display: block;
        }

        .article-not-found h2 {
            font-size: 1.5rem;
            color: var(--text-white);
            margin-bottom: 0.75rem;
        }

        .btn-back-home {
            display: inline-block;
            margin-top: 1.5rem;
            background: linear-gradient(135deg, var(--accent-gold), #FFC107);
            color: var(--primary-bg);
            padding: 0.8rem 2rem;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.95rem;
            text-decoration: none;
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.35);
            transition: var(--transition);
        }

        .btn-back-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.45);
            color: var(--primary-bg);
        }

        /* Article Sidebar */
        .article-sidebar {
            position: sticky;
            top: 90px;
        }

        .sidebar-card {
            background: var(--secondary-bg);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            border: 1px solid rgba(255, 215, 0, 0.2);
            margin-bottom: 1.5rem;
        }

        .sidebar-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin-bottom: 1rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px solid rgba(255, 215, 0, 0.2);
            letter-spacing: 0.02em;
        }

        .sidebar-promo {
            background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(255, 215, 0, 0.05));
            border-radius: var(--radius-md);
            padding: 1.5rem;
            border: 1px solid var(--border-gold);
            text-align: center;
        }

        .sidebar-promo-icon {
            font-size: 2.5rem;
            color: var(--accent-gold);
            margin-bottom: 0.75rem;
        }

        .sidebar-promo h3 {
            font-size: 1.1rem;
            color: var(--accent-gold);
            margin-bottom: 0.5rem;
        }

        .sidebar-promo p {
            font-size: 0.85rem;
            color: var(--text-pale);
            margin-bottom: 1.25rem;
        }

        .btn-promo {
            display: inline-block;
            background: var(--accent-red);
            color: var(--text-white);
            padding: 0.7rem 1.75rem;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.9rem;
            text-decoration: none;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(211, 47, 47, 0.35);
        }

        .btn-promo:hover {
            background: #B71C1C;
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(211, 47, 47, 0.45);
        }

        .sidebar-related-list {
            list-style: none;
        }

        .sidebar-related-list li {
            margin-bottom: 0.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px solid rgba(255, 215, 0, 0.12);
        }

        .sidebar-related-list li:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .sidebar-related-list a {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            font-size: 0.85rem;
            color: var(--text-pale);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .sidebar-related-list i {
            color: var(--accent-gold);
            font-size: 0.7rem;
            margin-top: 0.3rem;
        }

        /* CTA Section */
        .cta-section {
            padding: 4rem 0;
            background: linear-gradient(135deg, var(--secondary-bg), #0A2E1C);
            border-top: 1px solid var(--border-gold);
            border-bottom: 1px solid var(--border-gold);
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            flex-wrap: wrap;
        }

        .cta-text {
            flex: 1;
            min-width: 260px;
        }

        .cta-text h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }

        .cta-text p {
            color: var(--text-pale);
            font-size: 1rem;
        }

        .cta-actions {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-cta-primary,
        .btn-cta-secondary {
            padding: 0.9rem 2rem;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.95rem;
            text-decoration: none;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-cta-primary {
            background: linear-gradient(135deg, var(--accent-gold), #FFC107);
            color: var(--primary-bg);
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.35);
        }

        .btn-cta-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.45);
            color: var(--primary-bg);
        }

        .btn-cta-secondary {
            background: transparent;
            color: var(--text-pale);
            border: 1.5px solid rgba(209, 242, 235, 0.4);
        }

        .btn-cta-secondary:hover {
            border-color: var(--accent-gold);
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.06);
        }

        /* Footer */
        .site-footer {
            background: #071F13;
            padding: 3rem 0 1.5rem;
            border-top: 1px solid var(--border-gold);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-top: 1rem;
            line-height: 1.6;
        }

        .footer-col h4 {
            color: var(--accent-gold);
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 0.6rem;
        }

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.85rem;
            text-decoration: none;
            transition: var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: wrap;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 215, 0, 0.15);
        }

        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.8rem;
        }

        .footer-badges {
            display: flex;
            gap: 0.75rem;
            align-items: center;
        }

        .badge-18 {
            background: var(--accent-red);
            color: var(--text-white);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.8rem;
            border: 2px solid var(--text-white);
            box-shadow: 0 2px 8px rgba(211, 47, 47, 0.4);
        }

        .badge-license {
            background: rgba(255, 215, 0, 0.1);
            color: var(--accent-gold);
            padding: 0.4rem 0.9rem;
            border-radius: 999px;
            font-size: 0.7rem;
            font-weight: 600;
            border: 1px solid var(--border-gold);
            white-space: nowrap;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 5.5rem;
            z-index: 900;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #0A2E1C, #123E25);
            border: 2px solid var(--accent-gold);
            color: var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            cursor: pointer;
            transition: var(--transition);
            opacity: 0.7;
            position: fixed;
            animation: fabBreathe 3s ease-in-out infinite;
        }

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

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

        .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: #FF0040;
            border-radius: 50%;
            border: 2px solid var(--primary-bg);
            animation: fabBlink 1.5s ease-in-out infinite;
        }

        @keyframes fabBreathe {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-5px);
            }
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .article-sidebar {
                position: static;
            }

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

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(10, 46, 28, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 1rem 1.5rem;
                gap: 0.25rem;
                border-bottom: 1px solid var(--border-gold);
            }

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

            .nav-link {
                width: 100%;
                padding: 0.75rem 1rem;
                font-size: 0.95rem;
            }

            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 0.5rem 1rem;
                font-size: 0.8rem;
            }

            .nav-toggle {
                display: block;
            }

            .nav-logo-main {
                font-size: 1rem;
            }

            .nav-logo-sub {
                font-size: 0.6rem;
            }

            .nav-logo-icon {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }

            .article-hero {
                padding: 2.5rem 0 2rem;
            }

            .article-hero h1 {
                font-size: 1.6rem;
            }

            .article-body-section {
                padding: 2rem 0 3rem;
            }

            .article-featured-image img {
                height: 220px;
            }

            .article-content {
                font-size: 0.95rem;
            }

            .article-content h2 {
                font-size: 1.25rem;
            }

            .article-content h3 {
                font-size: 1.05rem;
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

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

            .fab-left {
                left: 1rem;
                bottom: 4.5rem;
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }

            .nav-actions {
                gap: 0.4rem;
            }

            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 0.45rem 0.85rem;
                font-size: 0.75rem;
            }

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

            .article-meta {
                gap: 0.75rem;
                font-size: 0.75rem;
            }

            .article-featured-image img {
                height: 180px;
            }

            .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .btn-cta-primary,
            .btn-cta-secondary {
                width: 100%;
                text-align: center;
            }

            .sidebar-promo {
                padding: 1.25rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A2E1C;
            --bg-secondary: #123E25;
            --bg-dark: #071f12;
            --gold: #FFD700;
            --gold-soft: #F0E68C;
            --red: #D32F2F;
            --red-bright: #FF4B4B;
            --white: #FFFFFF;
            --mint: #D1F2EB;
            --mint-dark: #A8D5C8;
            --text-soft: #C9E5DA;
            --border-gold: #D4AC0D;
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.25);
            --shadow-md: 0 10px 28px rgba(0,0,0,0.35);
            --shadow-gold: 0 8px 24px rgba(255,215,0,0.2);
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 32px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-body: 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-body);
            background: var(--bg-primary);
            color: var(--white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

        .container {
            width: min(1200px, 92%);
            margin: 0 auto;
        }

        /* Header & Nav */
        .site-header {
            background: rgba(7, 31, 18, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid rgba(255, 215, 0, 0.25);
            box-shadow: 0 4px 20px rgba(0,0,0,0.3);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 0.75rem 0;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.65rem;
            color: var(--white);
        }

        .nav-logo-icon {
            width: 44px;
            height: 44px;
            background: linear-gradient(145deg, var(--gold), #b8860b);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--bg-dark);
            box-shadow: 0 0 0 2px rgba(255,215,0,0.5), 0 6px 16px rgba(255,215,0,0.3);
        }

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

        .nav-logo-main {
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: 0.3px;
            color: var(--gold);
        }

        .nav-logo-sub {
            font-size: 0.72rem;
            color: var(--mint);
            letter-spacing: 0.4px;
            text-transform: uppercase;
            opacity: 0.85;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            flex-wrap: wrap;
        }

        .nav-link {
            padding: 0.5rem 0.85rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--mint);
            border-radius: 40px;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-link:hover, .nav-link.active {
            background: rgba(255, 215, 0, 0.15);
            color: var(--gold);
        }

        .nav-link.active {
            background: rgba(255, 215, 0, 0.2);
            box-shadow: inset 0 0 0 1px rgba(255,215,0,0.4);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }

        .btn-login, .btn-signup {
            padding: 0.55rem 1.25rem;
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: 30px;
            letter-spacing: 0.3px;
        }

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

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

        .btn-signup {
            background: linear-gradient(135deg, var(--gold), #d4a017);
            color: var(--bg-dark);
            box-shadow: 0 6px 18px rgba(255,215,0,0.4);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(255,215,0,0.55);
        }

        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--gold);
            background: rgba(255,255,255,0.06);
            padding: 0.35rem 0.7rem;
            border-radius: 12px;
        }

        /* Hero Section */
        .hero-km {
            background: radial-gradient(circle at 20% 20%, #1b4a30, #071f12 80%);
            padding: 4.5rem 0 4rem;
            position: relative;
            overflow: hidden;
        }

        .hero-km::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }

        .hero-km .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.2fr 0.9fr;
            gap: 3rem;
            align-items: center;
        }

        .hero-km-badge {
            display: inline-block;
            background: rgba(255,215,0,0.15);
            color: var(--gold);
            padding: 0.35rem 1rem;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 0.6px;
            border: 1px solid rgba(255,215,0,0.5);
            margin-bottom: 1.2rem;
        }

        .hero-km h1 {
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            font-weight: 900;
            line-height: 1.15;
            color: var(--white);
            margin-bottom: 1.2rem;
        }

        .hero-km h1 span {
            color: var(--gold);
            position: relative;
        }

        .hero-km p {
            font-size: 1.1rem;
            color: var(--mint);
            max-width: 580px;
            margin-bottom: 2rem;
        }

        .invite-progress {
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,215,0,0.3);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.8rem;
            margin-bottom: 2rem;
            backdrop-filter: blur(8px);
        }

        .progress-label {
            display: flex;
            justify-content: space-between;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: var(--gold);
        }

        .progress-bar {
            height: 12px;
            background: rgba(255,255,255,0.1);
            border-radius: 30px;
            overflow: hidden;
            margin-bottom: 0.6rem;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--gold), #ff8c00);
            border-radius: 30px;
            width: 68%;
            transition: width 1s ease;
        }

        .progress-note {
            font-size: 0.85rem;
            color: var(--mint);
        }

        .btn-hero-group {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-gold {
            background: linear-gradient(135deg, var(--gold), #e6b800);
            color: #0a1f10;
            padding: 0.9rem 2.2rem;
            font-weight: 800;
            font-size: 1rem;
            border-radius: 50px;
            box-shadow: 0 12px 28px rgba(255,215,0,0.35);
            transition: all var(--transition);
            letter-spacing: 0.4px;
        }

        .btn-gold:hover {
            transform: translateY(-4px);
            box-shadow: 0 18px 36px rgba(255,215,0,0.5);
        }

        .btn-outline-gold {
            background: transparent;
            color: var(--gold);
            border: 2px solid var(--gold);
            padding: 0.85rem 2rem;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 50px;
        }

        .btn-outline-gold:hover {
            background: rgba(255,215,0,0.1);
        }

        .hero-km-visual {
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,215,0,0.2);
            border-radius: var(--radius-lg);
            padding: 2rem;
            text-align: center;
            box-shadow: var(--shadow-gold);
        }

        .hero-km-visual img {
            border-radius: var(--radius-md);
            margin-bottom: 1.2rem;
            width: 100%;
            object-fit: cover;
        }

        .hero-km-visual h3 {
            color: var(--gold);
            font-size: 1.3rem;
            margin-bottom: 0.3rem;
        }

        .hero-km-visual p {
            color: var(--mint);
            margin-bottom: 0;
        }

        /* Main Content */
        .main-section {
            padding: 4rem 0;
        }

        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--white);
        }

        .section-subtitle {
            color: var(--mint);
            font-size: 1.1rem;
            max-width: 720px;
            margin-bottom: 2.5rem;
        }

        .benefit-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 2rem;
        }

        .benefit-item {
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(255,215,0,0.2);
            border-radius: var(--radius-md);
            padding: 2rem 1.8rem;
            transition: all var(--transition);
        }

        .benefit-item:hover {
            transform: translateY(-6px);
            background: rgba(255,215,0,0.05);
            border-color: rgba(255,215,0,0.5);
            box-shadow: var(--shadow-md);
        }

        .benefit-icon {
            width: 60px;
            height: 60px;
            background: rgba(255,215,0,0.12);
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--gold);
            margin-bottom: 1.4rem;
        }

        .benefit-item h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--gold);
        }

        .benefit-item p {
            color: var(--mint);
            font-size: 0.98rem;
        }

        .two-col-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .two-col-layout .content-text h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--gold);
            margin-bottom: 1rem;
        }

        .two-col-layout .content-text p {
            color: var(--mint);
            margin-bottom: 1.2rem;
        }

        .two-col-layout .content-text ul {
            list-style: none;
            padding: 0;
        }

        .two-col-layout .content-text ul li {
            padding-left: 1.8rem;
            position: relative;
            margin-bottom: 0.8rem;
            color: var(--text-soft);
        }

        .two-col-layout .content-text ul li::before {
            content: '\f058';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--gold);
        }

        .image-frame {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid rgba(255,215,0,0.25);
        }

        .image-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Steps Section */
        .steps-wrapper {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.8rem;
            counter-reset: step-counter;
        }

        .step-card {
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            border: 1px solid rgba(255,255,255,0.08);
            transition: all var(--transition);
            position: relative;
        }

        .step-card:hover {
            border-color: var(--gold);
            background: rgba(255,215,0,0.04);
            transform: translateY(-4px);
        }

        .step-number {
            font-size: 3rem;
            font-weight: 900;
            color: rgba(255,215,0,0.25);
            line-height: 1;
            margin-bottom: 0.8rem;
        }

        .step-card h4 {
            color: var(--gold);
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
        }

        .step-card p {
            color: var(--mint);
            font-size: 0.95rem;
        }

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

        .faq-item {
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: var(--radius-sm);
            margin-bottom: 1rem;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(255,215,0,0.4);
        }

        .faq-question {
            padding: 1.2rem 1.8rem;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--white);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: transparent;
            width: 100%;
            text-align: left;
        }

        .faq-question i {
            color: var(--gold);
            transition: transform var(--transition);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            background: rgba(0,0,0,0.2);
        }

        .faq-answer p {
            padding: 0 1.8rem 1.4rem;
            color: var(--mint);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

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

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #1b4a30, #0a2e1c);
            border-radius: var(--radius-lg);
            padding: 3.5rem 2.5rem;
            text-align: center;
            border: 1px solid rgba(255,215,0,0.3);
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 300px;
            height: 300px;
            background: rgba(255,215,0,0.08);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h3 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--gold);
            margin-bottom: 1rem;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            color: var(--mint);
            max-width: 600px;
            margin: 0 auto 2rem;
            position: relative;
            z-index: 1;
        }

        /* Footer */
        .site-footer {
            background: #05170d;
            padding: 3.5rem 0 2rem;
            border-top: 1px solid rgba(255,215,0,0.25);
            margin-top: 3rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand p {
            color: var(--mint);
            font-size: 0.95rem;
            margin-top: 1rem;
            max-width: 320px;
        }

        .footer-col h4 {
            color: var(--gold);
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 1.2rem;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 0.7rem;
        }

        .footer-col ul li a {
            color: var(--mint);
            font-size: 0.92rem;
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--gold);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .footer-bottom p {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
        }

        .footer-badges {
            display: flex;
            gap: 0.8rem;
            color: rgba(255,255,255,0.5);
            font-size: 0.85rem;
        }

        .footer-badges span {
            border: 1px solid rgba(255,255,255,0.15);
            padding: 0.3rem 0.8rem;
            border-radius: 30px;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: radial-gradient(circle at 30% 30%, #3d2b1f, #0a1f10);
            border: 2px solid var(--gold);
            box-shadow: 0 4px 20px rgba(255,215,0,0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--gold);
            opacity: 0.7;
            transition: all var(--transition);
            cursor: pointer;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 30px rgba(255,215,0,0.5);
        }

        .fab-left .notification-dot {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            background: #ff0040;
            border-radius: 50%;
            border: 2px solid #fff;
            animation: blink 1.8s infinite;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-km .container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .two-col-layout {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(7, 31, 18, 0.98);
                flex-direction: column;
                padding: 1rem 1.5rem;
                gap: 0.5rem;
                border-bottom: 1px solid rgba(255,215,0,0.3);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .nav-actions .btn-login, .nav-actions .btn-signup {
                display: block;
                padding: 0.4rem 0.9rem;
                font-size: 0.8rem;
            }
            .hero-km {
                padding: 2.5rem 0;
            }
            .hero-km h1 {
                font-size: 2.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-section {
                padding: 2.5rem 1.5rem;
            }
            .fab-left {
                bottom: 4.5rem;
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .nav-logo-main {
                font-size: 1rem;
            }
            .nav-logo-sub {
                font-size: 0.6rem;
            }
            .btn-hero-group {
                flex-direction: column;
                gap: 0.8rem;
            }
            .benefit-grid {
                grid-template-columns: 1fr;
            }
            .steps-wrapper {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A2E1C;
            --bg-secondary: #123E25;
            --bg-card: #0F3522;
            --bg-dark: #081E13;
            --gold: #FFD700;
            --gold-light: #FFE44D;
            --gold-dark: #C9A800;
            --red: #D32F2F;
            --red-light: #FF4D4D;
            --white: #FFFFFF;
            --mint: #D1F2EB;
            --mint-dark: #A8D8CE;
            --text-muted: #8FBFB0;
            --border-gold: rgba(255, 215, 0, 0.35);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
            --shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.4);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-2xl: 80px;
            --font-main: 'Segoe UI', 'Roboto', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        body {
            font-family: var(--font-main);
            background-color: var(--bg-primary);
            color: var(--mint);
            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;
            transition: var(--transition);
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        
        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 30, 19, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-gold);
            transition: var(--transition);
        }
        
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
            background: rgba(8, 30, 19, 0.98);
        }
        
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            padding-bottom: 12px;
            gap: var(--spacing-sm);
        }
        
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        
        .nav-logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--gold), var(--gold-dark));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-dark);
            font-size: 20px;
            box-shadow: var(--shadow-gold);
            flex-shrink: 0;
        }
        
        .nav-logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        
        .nav-logo-main {
            color: var(--gold);
            font-weight: 800;
            font-size: 16px;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        
        .nav-logo-sub {
            color: var(--mint-dark);
            font-size: 10px;
            font-weight: 500;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        
        .nav-menu {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }
        
        .nav-link {
            color: var(--mint);
            font-size: 14px;
            font-weight: 600;
            padding: 8px 14px;
            border-radius: 6px;
            position: relative;
            white-space: nowrap;
            transition: var(--transition);
        }
        
        .nav-link:hover,
        .nav-link.active {
            color: var(--gold);
            background: rgba(255, 215, 0, 0.08);
        }
        
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--gold);
            border-radius: 2px;
        }
        
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        
        .btn-login {
            background: transparent;
            color: var(--mint);
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 13px;
            font-weight: 600;
            border: 1px solid rgba(209, 242, 235, 0.3);
            transition: var(--transition);
            white-space: nowrap;
        }
        
        .btn-login:hover {
            border-color: var(--gold);
            color: var(--gold);
            background: rgba(255, 215, 0, 0.08);
        }
        
        .btn-signup {
            background: linear-gradient(135deg, var(--gold), var(--gold-dark));
            color: var(--bg-dark);
            padding: 8px 18px;
            border-radius: 6px;
            font-size: 13px;
            font-weight: 700;
            box-shadow: var(--shadow-gold);
            transition: var(--transition);
            white-space: nowrap;
        }
        
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 215, 0, 0.3);
            background: linear-gradient(135deg, var(--gold-light), var(--gold));
        }
        
        .btn-signup:active,
        .btn-login:active {
            transform: translateY(0);
        }
        
        .nav-toggle {
            display: none;
            background: transparent;
            color: var(--mint);
            font-size: 22px;
            padding: 6px;
            border-radius: 4px;
            transition: var(--transition);
        }
        
        .nav-toggle:hover {
            color: var(--gold);
            background: rgba(255, 215, 0, 0.1);
        }
        
        /* Page Header / Banner */
        .page-banner {
            padding-top: 100px;
            padding-bottom: var(--spacing-lg);
            background: linear-gradient(180deg, rgba(10, 46, 28, 0.9) 0%, rgba(10, 46, 28, 0.7) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border-gold);
            position: relative;
        }
        
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at top right, rgba(255, 215, 0, 0.08), transparent 60%);
            pointer-events: none;
        }
        
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: var(--spacing-md);
        }
        
        .breadcrumb a {
            color: var(--mint-dark);
            transition: var(--transition);
        }
        
        .breadcrumb a:hover {
            color: var(--gold);
        }
        
        .breadcrumb span {
            color: var(--gold);
        }
        
        .breadcrumb .separator {
            color: var(--text-muted);
        }
        
        .banner-content h1 {
            font-size: clamp(28px, 5vw, 42px);
            font-weight: 800;
            color: var(--white);
            line-height: 1.25;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.5px;
        }
        
        .banner-content h1 span {
            color: var(--gold);
            position: relative;
        }
        
        .banner-content p {
            font-size: 16px;
            color: var(--mint);
            max-width: 680px;
            line-height: 1.7;
        }
        
        /* Main Content */
        .main-content {
            padding: var(--spacing-xl) 0;
        }
        
        .section-block {
            margin-bottom: var(--spacing-xl);
        }
        
        .section-block:last-child {
            margin-bottom: 0;
        }
        
        .section-header {
            margin-bottom: var(--spacing-lg);
            max-width: 720px;
        }
        
        .section-label {
            display: inline-block;
            background: rgba(255, 215, 0, 0.12);
            color: var(--gold);
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            padding: 6px 14px;
            border-radius: 20px;
            border: 1px solid var(--border-gold);
            margin-bottom: var(--spacing-sm);
        }
        
        .section-header h2 {
            font-size: clamp(24px, 3.5vw, 34px);
            font-weight: 800;
            color: var(--white);
            line-height: 1.3;
            margin-bottom: var(--spacing-sm);
        }
        
        .section-header p {
            font-size: 15px;
            color: var(--mint-dark);
            line-height: 1.7;
        }
        
        /* Promo Cards */
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-md);
        }
        
        .promo-card {
            background: var(--bg-card);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg) var(--spacing-md);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        
        .promo-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--gold), var(--red), var(--gold));
            opacity: 0;
            transition: var(--transition);
        }
        
        .promo-card:hover {
            border-color: rgba(255, 215, 0, 0.6);
            transform: translateY(-4px);
            box-shadow: var(--shadow-gold);
        }
        
        .promo-card:hover::before {
            opacity: 1;
        }
        
        .promo-icon {
            width: 52px;
            height: 52px;
            background: rgba(255, 215, 0, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 24px;
            margin-bottom: var(--spacing-sm);
        }
        
        .promo-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: var(--spacing-xs);
            line-height: 1.4;
        }
        
        .promo-card p {
            font-size: 14px;
            color: var(--mint-dark);
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
        }
        
        .promo-tag {
            display: inline-block;
            background: var(--red);
            color: var(--white);
            font-size: 11px;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 4px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: var(--spacing-xs);
        }
        
        .promo-tag.gold {
            background: var(--gold);
            color: var(--bg-dark);
        }
        
        .promo-tag.green {
            background: #2E7D32;
            color: var(--white);
        }
        
        /* Code Display */
        .code-display {
            background: var(--bg-dark);
            border: 1px dashed var(--gold);
            border-radius: var(--radius-sm);
            padding: var(--spacing-sm) var(--spacing-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-sm);
        }
        
        .code-text {
            font-family: 'Courier New', monospace;
            font-size: 16px;
            font-weight: 700;
            color: var(--gold);
            letter-spacing: 1px;
        }
        
        .btn-copy {
            background: rgba(255, 215, 0, 0.15);
            color: var(--gold);
            padding: 6px 14px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            transition: var(--transition);
        }
        
        .btn-copy:hover {
            background: rgba(255, 215, 0, 0.25);
        }
        
        /* Steps */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: var(--spacing-md);
        }
        
        .step-item {
            display: flex;
            gap: var(--spacing-sm);
            align-items: flex-start;
        }
        
        .step-number {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--gold), var(--gold-dark));
            color: var(--bg-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 16px;
            flex-shrink: 0;
            box-shadow: var(--shadow-gold);
        }
        
        .step-content h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 4px;
        }
        
        .step-content p {
            font-size: 13px;
            color: var(--mint-dark);
            line-height: 1.6;
        }
        
        /* Info Section with Image */
        .info-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
            align-items: center;
            background: var(--bg-secondary);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            border: 1px solid var(--border-gold);
        }
        
        .info-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-dark);
        }
        
        .info-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .info-content h3 {
            font-size: 22px;
            font-weight: 800;
            color: var(--white);
            margin-bottom: var(--spacing-sm);
            line-height: 1.3;
        }
        
        .info-content p {
            font-size: 14px;
            color: var(--mint-dark);
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
        }
        
        .info-list {
            list-style: none;
            padding: 0;
        }
        
        .info-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--mint);
            padding: 6px 0;
        }
        
        .info-list li i {
            color: var(--gold);
            font-size: 14px;
        }
        
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        
        .faq-item:hover {
            border-color: rgba(255, 215, 0, 0.5);
        }
        
        .faq-question {
            width: 100%;
            text-align: left;
            background: transparent;
            color: var(--white);
            padding: var(--spacing-md);
            font-size: 15px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            border: none;
            transition: var(--transition);
        }
        
        .faq-question:hover {
            color: var(--gold);
        }
        
        .faq-question i {
            transition: var(--transition);
            font-size: 14px;
            color: var(--gold);
        }
        
        .faq-question.active i {
            transform: rotate(180deg);
        }
        
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        
        .faq-answer-inner {
            padding: 0 var(--spacing-md) var(--spacing-md);
            font-size: 14px;
            color: var(--mint-dark);
            line-height: 1.7;
        }
        
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        
        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-secondary), var(--bg-dark));
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.1), transparent 70%);
            pointer-events: none;
        }
        
        .cta-section h2 {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 800;
            color: var(--white);
            margin-bottom: var(--spacing-sm);
            position: relative;
            z-index: 1;
        }
        
        .cta-section p {
            font-size: 15px;
            color: var(--mint-dark);
            max-width: 520px;
            margin: 0 auto var(--spacing-md);
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        
        .cta-buttons {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--gold), var(--gold-dark));
            color: var(--bg-dark);
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 700;
            box-shadow: var(--shadow-gold);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(255, 215, 0, 0.35);
            background: linear-gradient(135deg, var(--gold-light), var(--gold));
        }
        
        .btn-secondary {
            background: transparent;
            color: var(--mint);
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid rgba(209, 242, 235, 0.4);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        
        .btn-secondary:hover {
            border-color: var(--gold);
            color: var(--gold);
            background: rgba(255, 215, 0, 0.08);
        }
        
        /* Trust badges */
        .trust-strip {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            margin-top: var(--spacing-md);
            position: relative;
            z-index: 1;
        }
        
        .trust-item {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--mint-dark);
        }
        
        .trust-item i {
            color: var(--gold);
            font-size: 14px;
        }
        
        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-gold);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: var(--spacing-xl);
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        
        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: var(--spacing-sm);
        }
        
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--gold);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.5px;
        }
        
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        
        .footer-col ul li {
            margin-bottom: 8px;
        }
        
        .footer-col ul li a {
            font-size: 13px;
            color: var(--mint-dark);
            transition: var(--transition);
        }
        
        .footer-col ul li a:hover {
            color: var(--gold);
            padding-left: 4px;
        }
        
        .footer-bottom {
            border-top: 1px solid rgba(255, 215, 0, 0.15);
            padding-top: var(--spacing-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        
        .footer-bottom p {
            font-size: 12px;
            color: var(--text-muted);
        }
        
        .footer-badges {
            display: flex;
            gap: var(--spacing-xs);
            align-items: center;
        }
        
        .badge-18 {
            background: var(--red);
            color: var(--white);
            font-size: 11px;
            font-weight: 800;
            padding: 4px 8px;
            border-radius: 4px;
            letter-spacing: 0.5px;
        }
        
        .badge-license {
            background: rgba(255, 215, 0, 0.15);
            color: var(--gold);
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            border: 1px solid var(--border-gold);
        }
        
        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-dark);
            border: 2px solid var(--gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 24px;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            opacity: 0.7;
            transition: var(--transition);
            animation: float 3s ease-in-out infinite;
            cursor: pointer;
        }
        
        .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);
        }
        
        .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: var(--red-light);
            border-radius: 50%;
            border: 2px solid var(--bg-dark);
            animation: blink 2s ease-in-out infinite;
        }
        
        @keyframes float {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-8px);
            }
        }
        
        @keyframes blink {
            0%, 100% {
                opacity: 1;
            }
            50% {
                opacity: 0.4;
            }
        }
        
        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
            
            .info-section {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
        }
        
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(8, 30, 19, 0.98);
                flex-direction: column;
                padding: var(--spacing-sm);
                border-bottom: 1px solid var(--border-gold);
                box-shadow: var(--shadow-dark);
            }
            
            .nav-menu.open {
                display: flex;
            }
            
            .nav-link {
                width: 100%;
                text-align: left;
                padding: 12px 16px;
                border-radius: 6px;
            }
            
            .nav-link.active::after {
                display: none;
            }
            
            .nav-actions {
                gap: 6px;
            }
            
            .btn-login,
            .btn-signup {
                padding: 7px 12px;
                font-size: 12px;
            }
            
            .page-banner {
                padding-top: 80px;
            }
            
            .promo-grid,
            .steps-list {
                grid-template-columns: 1fr;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: var(--spacing-xs);
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }
        
        @media (max-width: 520px) {
            .nav-logo-main {
                font-size: 13px;
            }
            
            .nav-logo-sub {
                font-size: 8px;
            }
            
            .nav-logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }
            
            .btn-login,
            .btn-signup {
                padding: 6px 10px;
                font-size: 11px;
            }
            
            .btn-login {
                display: none;
            }
            
            .btn-signup {
                display: inline-block;
            }
            
            .section-header h2 {
                font-size: 22px;
            }
            
            .banner-content h1 {
                font-size: 26px;
            }
            
            .info-section {
                padding: var(--spacing-md);
            }
            
            .cta-section {
                padding: var(--spacing-md);
            }
            
            .code-display {
                flex-direction: column;
                text-align: center;
                gap: var(--spacing-xs);
            }
            
            .fab {
                width: 48px;
                height: 48px;
                font-size: 20px;
                left: 12px;
                bottom: 80px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-deep: #0B1A30;
            --bg-dark: #0F0C20;
            --bg-card: #131B31;
            --bg-elevated: #1A2440;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --accent-hot: #FF007F;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #6B7280;
            --border-neon: rgba(0, 240, 255, 0.25);
            --border-lime: rgba(204, 255, 0, 0.3);
            --gradient-neon: linear-gradient(135deg, #CCFF00 0%, #00F0FF 100%);
            --gradient-cyber: linear-gradient(135deg, #00F0FF 0%, #FF007F 100%);
            --shadow-neon: 0 0 25px rgba(0, 240, 255, 0.2);
            --shadow-lime: 0 0 25px rgba(204, 255, 0, 0.15);
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --font-primary: 'Be Vietnam Pro', 'Inter', sans-serif;
            --font-body: 'Inter', 'Be Vietnam Pro', sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1240px;
            --header-height: 76px;
        }

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

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

        body {
            font-family: var(--font-body);
            background-color: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
            min-height: 100vh;
            background-image: radial-gradient(circle at 20% 20%, rgba(0, 240, 255, 0.04) 0%, transparent 50%),
                radial-gradient(circle at 80% 60%, rgba(204, 255, 0, 0.03) 0%, transparent 50%);
        }

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

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

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

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

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

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 26, 48, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            transition: var(--transition-smooth);
            height: var(--header-height);
        }

        .site-header.scrolled {
            background: rgba(11, 26, 48, 0.98);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: var(--header-height);
        }

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

        .nav-logo-icon {
            width: 44px;
            height: 44px;
            background: var(--gradient-neon);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-dark);
            font-size: 22px;
            flex-shrink: 0;
            box-shadow: var(--shadow-neon);
        }

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

        .nav-logo-main {
            font-family: var(--font-primary);
            font-weight: 800;
            font-size: 18px;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }

        .nav-logo-sub {
            font-size: 10px;
            color: var(--text-silver);
            font-weight: 500;
            letter-spacing: 0.3px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            font-family: var(--font-primary);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-silver);
            padding: 10px 16px;
            border-radius: 10px;
            position: relative;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

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

        .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.12);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--gradient-neon);
            border-radius: 2px;
        }

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

        .btn-login {
            background: transparent;
            color: var(--text-white);
            font-family: var(--font-primary);
            font-weight: 600;
            font-size: 14px;
            padding: 10px 18px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            letter-spacing: 0.3px;
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
        }

        .btn-signup {
            background: var(--gradient-neon);
            color: var(--bg-dark);
            font-family: var(--font-primary);
            font-weight: 700;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: 10px;
            letter-spacing: 0.3px;
            box-shadow: var(--shadow-neon);
            white-space: nowrap;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.35);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 22px;
            padding: 8px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        /* Page Banner */
        .page-banner {
            padding: calc(var(--header-height) + 40px) 0 48px;
            background: linear-gradient(180deg, rgba(0, 240, 255, 0.08) 0%, rgba(11, 26, 48, 0) 100%);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-3.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.06;
            pointer-events: none;
        }

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

        .banner-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-silver);
            margin-bottom: 16px;
            font-weight: 500;
        }

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

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

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

        .page-banner h1 {
            font-family: var(--font-primary);
            font-size: clamp(32px, 5vw, 48px);
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            color: var(--text-white);
        }

        .page-banner h1 .highlight {
            background: var(--gradient-neon);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-banner .banner-desc {
            font-size: 17px;
            color: var(--text-silver);
            max-width: 680px;
            line-height: 1.7;
            font-weight: 400;
        }

        /* Section */
        .section {
            padding: 64px 0;
        }

        .section-alt {
            background: rgba(19, 27, 49, 0.5);
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            border-bottom: 1px solid rgba(0, 240, 255, 0.08);
        }

        .section-heading {
            margin-bottom: 40px;
        }

        .section-heading h2 {
            font-family: var(--font-primary);
            font-size: clamp(24px, 3.5vw, 36px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
            color: var(--text-white);
        }

        .section-heading h2 .highlight {
            background: var(--gradient-neon);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-heading p {
            font-size: 16px;
            color: var(--text-silver);
            max-width: 640px;
            line-height: 1.7;
        }

        /* Feature Grid */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-neon);
            opacity: 0;
            transition: var(--transition-smooth);
        }

        .feature-card:hover {
            border-color: rgba(0, 240, 255, 0.35);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }

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

        .feature-card .icon-wrapper {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }

        .feature-card h3 {
            font-family: var(--font-primary);
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-white);
        }

        .feature-card p {
            font-size: 14.5px;
            color: var(--text-silver);
            line-height: 1.7;
        }

        /* Event Timeline */
        .timeline-list {
            display: flex;
            flex-direction: column;
            gap: 32px;
            position: relative;
            padding-left: 32px;
        }

        .timeline-list::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(180deg, var(--accent-cyan), var(--accent-lime), var(--accent-hot));
            border-radius: 2px;
            opacity: 0.5;
        }

        .timeline-item {
            position: relative;
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            transition: var(--transition-smooth);
        }

        .timeline-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-card);
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -28px;
            top: 32px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
            border: 2px solid var(--bg-deep);
        }

        .timeline-item .event-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(204, 255, 0, 0.15);
            color: var(--accent-lime);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .timeline-item h3 {
            font-family: var(--font-primary);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-white);
        }

        .timeline-item p {
            font-size: 14.5px;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .timeline-item .event-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

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

        /* Stats Row */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 48px;
        }

        .stat-block {
            background: var(--bg-elevated);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            transition: var(--transition-smooth);
        }

        .stat-block:hover {
            border-color: rgba(204, 255, 0, 0.35);
            transform: translateY(-3px);
            box-shadow: var(--shadow-lime);
        }

        .stat-number {
            font-family: var(--font-primary);
            font-size: 32px;
            font-weight: 900;
            background: var(--gradient-neon);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 6px;
        }

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

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

        .step-card {
            background: var(--bg-card);
            border: 1px solid rgba(204, 255, 0, 0.12);
            border-radius: var(--radius-md);
            padding: 28px;
            position: relative;
            transition: var(--transition-smooth);
        }

        .step-card:hover {
            border-color: rgba(204, 255, 0, 0.3);
            transform: translateY(-3px);
            box-shadow: var(--shadow-lime);
        }

        .step-number {
            font-family: var(--font-primary);
            font-size: 42px;
            font-weight: 900;
            color: rgba(204, 255, 0, 0.2);
            position: absolute;
            top: 16px;
            right: 20px;
            line-height: 1;
        }

        .step-card h3 {
            font-family: var(--font-primary);
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-white);
            padding-right: 50px;
        }

        .step-card p {
            font-size: 14.5px;
            color: var(--text-silver);
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.12) 0%, rgba(204, 255, 0, 0.08) 50%, rgba(255, 0, 127, 0.06) 100%);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 50% 50%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
            animation: ctaGlow 8s ease-in-out infinite;
            pointer-events: none;
        }

        @keyframes ctaGlow {
            0%,
            100% {
                transform: translate(0, 0);
            }
            50% {
                transform: translate(10%, 5%);
            }
        }

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

        .cta-section h2 {
            font-family: var(--font-primary);
            font-size: clamp(26px, 4vw, 38px);
            font-weight: 900;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }

        .cta-section h2 .highlight {
            background: var(--gradient-neon);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

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

        .btn-primary {
            background: var(--gradient-neon);
            color: var(--bg-dark);
            font-family: var(--font-primary);
            font-weight: 700;
            font-size: 16px;
            padding: 14px 32px;
            border-radius: 12px;
            letter-spacing: 0.3px;
            box-shadow: var(--shadow-neon);
            transition: var(--transition-smooth);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.4);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-white);
            font-family: var(--font-primary);
            font-weight: 600;
            font-size: 16px;
            padding: 14px 28px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            letter-spacing: 0.3px;
            transition: var(--transition-smooth);
        }

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

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 800px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.1);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.25);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
            background: transparent;
            width: 100%;
            text-align: left;
            font-family: var(--font-primary);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            letter-spacing: 0.2px;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            font-size: 14px;
            transition: var(--transition-fast);
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            background: rgba(204, 255, 0, 0.15);
            color: var(--accent-lime);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14.5px;
            color: var(--text-silver);
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid rgba(0, 240, 255, 0.12);
            padding: 56px 0 24px;
            margin-top: 64px;
        }

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

        .footer-brand p {
            font-size: 14px;
            color: var(--text-silver);
            line-height: 1.7;
            margin-top: 16px;
            max-width: 320px;
        }

        .footer-col h4 {
            font-family: var(--font-primary);
            font-size: 15px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

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

        .footer-col ul li a {
            font-size: 13.5px;
            color: var(--text-silver);
            transition: var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

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

        .footer-badges {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .footer-badge {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 11px;
            font-weight: 600;
            color: var(--text-silver);
            background: rgba(255, 255, 255, 0.05);
            padding: 6px 12px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-badge i {
            color: var(--accent-cyan);
            font-size: 12px;
        }

        /* FAB */
        .fab-float {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 990;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(15, 12, 32, 0.85), rgba(15, 12, 32, 0.85)), var(--gradient-cyber);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 22px;
            cursor: pointer;
            transition: var(--transition-smooth);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
            opacity: 0.7;
            animation: fabBreath 3s ease-in-out infinite;
        }

        @keyframes fabBreath {
            0%,
            100% {
                box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
            }
            50% {
                box-shadow: 0 0 32px rgba(0, 240, 255, 0.55);
            }
        }

        .fab-float:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.6);
        }

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

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

        @keyframes fabBlink {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(0.8);
            }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(11, 26, 48, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 16px 24px;
                border-bottom: 1px solid rgba(0, 240, 255, 0.15);
                transform: translateY(-120%);
                transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 999;
            }

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

            .nav-link {
                padding: 14px 16px;
                font-size: 15px;
                border-radius: 10px;
            }

            .nav-toggle {
                display: block;
            }

            .nav-actions {
                gap: 6px;
            }

            .btn-login,
            .btn-signup {
                padding: 8px 14px;
                font-size: 13px;
            }

            .page-banner {
                padding: calc(var(--header-height) + 24px) 0 32px;
            }

            .section {
                padding: 40px 0;
            }

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

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

            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

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

            .cta-section {
                padding: 32px 24px;
            }

            .timeline-list {
                padding-left: 24px;
            }

            .timeline-item {
                padding: 20px;
            }

            .timeline-item::before {
                left: -20px;
                width: 10px;
                height: 10px;
            }
        }

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

            .nav-logo-main {
                font-size: 15px;
            }
            .nav-logo-sub {
                font-size: 8px;
            }
            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 18px;
                border-radius: 10px;
            }

            .btn-login {
                padding: 8px 10px;
                font-size: 12px;
            }
            .btn-signup {
                padding: 8px 12px;
                font-size: 12px;
            }

            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner .banner-desc {
                font-size: 14.5px;
            }

            .section-heading h2 {
                font-size: 24px;
            }

            .feature-card {
                padding: 20px;
            }

            .stats-row {
                grid-template-columns: 1fr 1fr;
            }
            .stat-number {
                font-size: 20px;
            }

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

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .cta-buttons {
                flex-direction: column;
            }

            .btn-primary,
            .btn-secondary {
                width: 100%;
                text-align: center;
            }

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