:root {
            --brand-primary: #00C2FF;
            --brand-primary-hover: #33D1FF;
            --brand-secondary: #C0C0C8;
            --brand-accent: #FFD300;
            --bg-main: #050B18;
            --bg-surface: #0D162B;
            --bg-elevated: #16223D;
            --text-primary: #E6F0FF;
            --text-secondary: #A9B9D0;
            --text-muted: #6E82A0;
            --border-default: #1E2D4D;
            --border-brand: #00C2FF;
            --btn-bg: #00C2FF;
            --btn-text: #050B18;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-pill: 9999px;
            --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
            --glow-cyan: 0 0 15px rgba(0, 194, 255, 0.4);
            --grad-brand: linear-gradient(135deg, #00C2FF 0%, #007AFF 100%);
            --grad-hero: radial-gradient(circle at top right, #16223D 0%, #050B18 100%);
        }
        html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
        body {
            margin: 0;
            font-family: 'Be Vietnam Pro', sans-serif;
            font-size: clamp(15px, 3.9vw, 16px);
            line-height: 1.65;
            padding-inline: 14px;
            padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px));
            overflow-x: hidden;
            background-color: var(--bg-main);
            color: var(--text-primary);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--brand-primary); text-decoration: none; transition: color 0.3s; }
        a:hover { color: var(--brand-primary-hover); }
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-block: 1rem;
            max-width: 1200px;
            margin-inline: auto;
        }
        .header-brand { display: flex; align-items: center; gap: 8px; }
        .header-brand strong { font-size: 16px; font-weight: normal; }
        .header-auth { display: flex; gap: 12px; }
        .btn-auth {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.875rem;
            transition: all 0.3s;
        }
        .btn-login { background: transparent; color: var(--text-primary); border: 1px solid var(--border-default); }
        .btn-register { background: var(--btn-bg); color: var(--btn-text); }
        .btn-register:hover { background: var(--brand-primary-hover); }

        main { max-width: 1200px; margin-inline: auto; }
        
        .hero-section {
            text-align: center;
            padding-block: 3rem 1.5rem;
            background: var(--grad-hero);
        }
        h1 { 
            font-size: clamp(1.6rem, 6.5vw, 2.75rem); 
            line-height: 1.2; 
            margin-bottom: 1.5rem;
            color: var(--text-primary);
        }
        .hero-intro { 
            max-width: 800px; 
            margin-inline: auto; 
            margin-bottom: 2rem; 
            color: var(--text-secondary); 
        }
        .hero-cta {
            display: block;
            width: 100%;
            max-width: 400px;
            margin: 0 auto 2rem;
            padding: 16px;
            background: var(--grad-brand);
            color: var(--btn-text);
            font-weight: 700;
            border-radius: var(--radius-pill);
            text-align: center;
            box-shadow: var(--glow-cyan);
        }
        .hero-tags {
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .tag-pill {
            padding: 4px 12px;
            background: var(--bg-elevated);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-pill);
            font-size: 0.75rem;
            color: var(--text-secondary);
        }

        .banner-wrapper { margin-block: 1.5rem; line-height: 0; }
        .banner-img { width: 100%; aspect-ratio: 2 / 1; object-fit: cover; border-radius: var(--radius-md); }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-block: 2rem;
        }
        .cat-tile {
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
            text-align: center;
            transition: border-color 0.3s;
        }
        .cat-tile:hover { border-color: var(--brand-primary); }
        .cat-tile i { font-size: 2rem; color: var(--brand-primary); margin-bottom: 12px; }
        .cat-tile span { display: block; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
        .cat-tile p { font-size: 0.8rem; color: var(--text-muted); margin: 0; }

        .game-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-block: 2rem;
        }
        .game-card {
            background: var(--bg-surface);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-default);
            transition: transform 0.3s;
        }
        .game-card:hover { transform: translateY(-5px); }
        .game-card img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
        .game-card h3 { 
            font-size: 1rem; 
            padding: 12px; 
            margin: 0; 
            text-align: center; 
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .facts-container {
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--border-default);
            margin-block: 2rem;
        }
        .freshness-notice {
            font-style: italic;
            color: var(--text-muted);
            font-size: 0.875rem;
            margin-bottom: 1.5rem;
            display: block;
        }
        .facts-table {
            width: 100%;
            border-collapse: collapse;
        }
        .facts-table td {
            padding: 12px;
            border-bottom: 1px solid var(--border-default);
            font-size: 0.9rem;
        }
        .facts-table td:first-child { color: var(--text-secondary); width: 40%; }
        .facts-table td:last-child { color: var(--text-primary); text-align: right; }
        .terms-link-wrap { margin-top: 1rem; text-align: center; font-size: 0.8rem; }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 12px;
            padding-block: 1rem;
            margin-block: 1rem;
            scrollbar-width: none;
        }
        .toc-nav::-webkit-scrollbar { display: none; }
        .toc-link {
            white-space: nowrap;
            padding: 8px 16px;
            background: var(--bg-elevated);
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            border: 1px solid var(--border-default);
        }

        .promo-grid { display: flex; flex-direction: column; gap: 16px; margin-block: 2rem; }
        .promo-card {
            background: var(--bg-surface);
            padding: 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .promo-card h3 { margin: 0; color: var(--brand-primary); }
        .promo-card p { margin: 0; color: var(--text-secondary); font-size: 0.95rem; }
        .promo-cta {
            align-self: flex-start;
            padding: 10px 20px;
            background: var(--btn-bg);
            color: var(--btn-text);
            border-radius: var(--radius-sm);
            font-weight: 600;
        }

        .usp-bar { display: flex; flex-direction: column; gap: 16px; margin-block: 2rem; }
        .usp-tile {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px;
            background: var(--bg-surface);
            border-radius: var(--radius-md);
            border-left: 4px solid var(--brand-primary);
        }
        .usp-tile i { font-size: 1.5rem; color: var(--brand-primary); width: 30px; }
        .usp-content strong { display: block; color: var(--text-primary); }
        .usp-content p { margin: 0; font-size: 0.85rem; color: var(--text-secondary); }

        .payment-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-block: 2rem;
        }
        .pay-card {
            background: var(--bg-surface);
            padding: 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
            text-align: center;
        }
        .pay-card i { font-size: 1.5rem; color: var(--brand-primary); margin-bottom: 8px; }
        .pay-card strong { display: block; margin-bottom: 8px; font-size: 0.9rem; }
        .pay-card p { font-size: 0.75rem; color: var(--text-muted); margin: 0; }

        .guide-steps { display: flex; flex-direction: column; gap: 20px; margin-block: 2rem; }
        .step-item {
            display: flex;
            gap: 16px;
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }
        .step-num {
            min-width: 36px;
            height: 36px;
            background: var(--brand-primary);
            color: var(--btn-text);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }
        .step-text h3 { margin: 0 0 8px 0; font-size: 1.1rem; }
        .step-text h3 a { color: inherit; }
        .step-text p { margin: 0; font-size: 0.9rem; color: var(--text-secondary); }

        .app-section {
            background: var(--bg-elevated);
            padding: 32px 24px;
            border-radius: var(--radius-lg);
            text-align: center;
            margin-block: 2rem;
        }
        .app-cta {
            display: inline-block;
            margin-top: 20px;
            padding: 14px 32px;
            background: var(--brand-primary);
            color: var(--btn-text);
            border-radius: var(--radius-pill);
            font-weight: 700;
        }

        .player-guides { display: flex; flex-direction: column; gap: 16px; margin-block: 2rem; }
        .guide-item {
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }
        .guide-item h3 { margin: 0 0 4px 0; color: var(--text-primary); }
        .guide-meta { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 12px; display: block; }
        .guide-item p { margin: 0; font-size: 0.9rem; color: var(--text-secondary); }

        .announcement-list { display: flex; flex-direction: column; gap: 16px; margin-block: 2rem; }
        .ann-item {
            display: flex;
            gap: 16px;
            padding: 16px;
            background: var(--bg-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }
        .ann-item i { color: var(--brand-primary); margin-top: 4px; }
        .ann-content h3 { margin: 0 0 8px 0; font-size: 1rem; }
        .ann-content p { margin: 0 0 8px 0; font-size: 0.85rem; color: var(--text-secondary); }
        .ann-date { font-size: 0.75rem; color: var(--text-muted); }

        .faq-section { margin-block: 2rem; }
        .faq-item {
            background: var(--bg-surface);
            margin-bottom: 12px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
            overflow: hidden;
        }
        .faq-item summary {
            padding: 16px;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-item summary h3 { margin: 0; font-size: 1rem; color: var(--text-primary); }
        .faq-item p { padding: 0 16px 16px; margin: 0; font-size: 0.9rem; color: var(--text-secondary); }

        .about-section {
            background: var(--bg-surface);
            padding: 32px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
            margin-block: 2rem;
        }
        .team-card {
            margin-top: 24px;
            padding: 20px;
            background: var(--bg-elevated);
            border-radius: var(--radius-md);
            border-left: 4px solid var(--brand-primary);
        }
        .team-card h3 { margin: 0 0 12px 0; font-size: 1.1rem; }
        .team-card p { margin: 0 0 8px 0; font-size: 0.85rem; color: var(--text-secondary); }

        .security-section {
            padding: 32px 24px;
            background: var(--bg-elevated);
            border-radius: var(--radius-lg);
            margin-block: 2rem;
            text-align: center;
        }
        .rg-links { display: flex; justify-content: center; gap: 20px; margin-block: 20px; flex-wrap: wrap; }
        .rg-link { font-weight: 600; color: var(--brand-primary); border: 1px solid var(--brand-primary); padding: 8px 16px; border-radius: var(--radius-pill); }

        footer {
            margin-top: 4rem;
            padding-block: 3rem 0;
            border-top: 1px solid var(--border-default);
            text-align: center;
        }
        .footer-sitemap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 2rem;
            text-align: left;
            max-width: 800px;
            margin-inline: auto;
        }
        .footer-contact { margin-bottom: 1.5rem; font-size: 0.9rem; }
        .footer-legal { font-size: 0.8rem; color: var(--text-muted); line-height: 1.4; }

        .navigator {
            position: fixed;
            inset-inline: 0;
            bottom: 0;
            background: rgba(13, 22, 43, 0.9);
            backdrop-filter: blur(10px);
            display: flex;
            justify-content: space-around;
            align-items: center;
            padding-block: 10px;
            padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px));
            border-top: 1px solid var(--border-default);
            z-index: 1000;
        }
        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            color: var(--text-secondary);
            font-size: 0.7rem;
            text-decoration: none;
        }
        .nav-item i { font-size: 1.2rem; }
        .nav-item:hover { color: var(--brand-primary); }

        .util-link { font-size: 0.85rem; color: var(--brand-primary); text-decoration: underline; }

        section { content-visibility: auto; contain-intrinsic-size: 500px; }

        @media (min-width: 768px) {
            body { padding-inline: 24px; padding-bottom: 24px; }
            .category-grid { grid-template-columns: repeat(3, 1fr); }
            .game-grid { grid-template-columns: repeat(2, 1fr); }
            .payment-grid { grid-template-columns: repeat(4, 1fr); }
            .navigator { position: static; display: none; }
        }
        @media (min-width: 1200px) {
            body { padding-inline: 32px; max-width: 1200px; margin-inline: auto; }
            .category-grid { grid-template-columns: repeat(4, 1fr); }
            .game-grid { grid-template-columns: repeat(4, 1fr); }
            .payment-grid { grid-template-columns: repeat(4, 1fr); }
        }