:root {
            --primary-bg: #050B14;
            --surface-bg: #0D1726;
            --elevated-bg: #16233A;
            --brand-color: #00F2FF;
            --brand-hover: #70F9FF;
            --text-primary: #E6EEF5;
            --text-secondary: #AAB8C8;
            --text-muted: #708296;
            --border-color: #1E2D44;
            --border-brand: rgba(0, 242, 255, 0.4);
            --glass-bg: rgba(13, 23, 38, 0.8);
            --radius-md: 12px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
        }

        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;
            background-color: var(--primary-bg);
            color: var(--text-primary);
            padding-inline: 14px;
            padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px));
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: var(--brand-color); transition: color 0.3s; }
        a:hover { color: var(--brand-hover); }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
            max-width: 1200px;
            margin: 0 auto;
        }
        .header-logo { display: flex; align-items: center; gap: 8px; }
        .header-logo strong { font-size: 16px; font-weight: normal; color: var(--text-primary); }
        .header-auth { display: flex; gap: 12px; }
        .btn-auth {
            padding: 8px 16px;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 14px;
        }
        .btn-login { background: var(--surface-bg); color: var(--text-primary); border: 1px solid var(--border-color); }
        .btn-register { background: var(--brand-color); color: var(--primary-bg); font-weight: 600; }

        main { max-width: 1200px; margin: 0 auto; }
        
        .hero-panel { text-align: center; padding: 2rem 0; }
        .hero-panel h1 {
            font-size: clamp(1.6rem, 6.5vw, 2.4rem);
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .hero-intro {
            max-width: 800px;
            margin: 0 auto 2rem;
            color: var(--text-secondary);
            font-size: 1.1rem;
        }
        .hero-cta {
            display: block;
            width: 100%;
            background: linear-gradient(180deg, #00F2FF 0%, #00C8D4 100%);
            color: var(--primary-bg);
            text-align: center;
            padding: 16px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
        }
        .hero-tags { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
        .hero-tag {
            background: var(--surface-bg);
            border: 1px solid var(--border-brand);
            color: var(--text-primary);
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 13px;
        }

        .banner-wrap a { display: block; width: 100%; aspect-ratio: 2 / 1; overflow: hidden; border-radius: var(--radius-lg); }
        .banner-wrap img { width: 100%; height: 100%; object-fit: cover; }

        .category-hub {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin: 2rem 0;
        }
        .cat-tile {
            background: var(--surface-bg);
            border: 1px solid var(--border-color);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            text-align: center;
            transition: transform 0.2s, border-color 0.2s;
        }
        .cat-tile:hover { transform: translateY(-5px); border-color: var(--brand-color); }
        .cat-tile i { font-size: 2rem; color: var(--brand-color); margin-bottom: 10px; }
        .cat-tile strong { display: block; color: var(--text-primary); margin-bottom: 8px; }
        .cat-tile span { font-size: 13px; color: var(--text-muted); display: block; }

        .game-section { margin-top: 3rem; }
        .game-section h2 {
            font-size: clamp(1.3rem, 5.2vw, 1.8rem);
            margin-bottom: 1.5rem;
            text-align: center;
        }
        .game-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }
        .game-card {
            background: var(--surface-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: border-color 0.3s;
        }
        .game-card:hover { border-color: var(--brand-color); }
        .game-card img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
        .game-card h3 {
            font-size: 14px;
            padding: 12px;
            margin: 0;
            text-align: center;
            color: var(--text-primary);
        }

        .facts-panel {
            background: var(--surface-bg);
            border-radius: var(--radius-lg);
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid var(--border-color);
        }
        .facts-header { text-align: center; margin-bottom: 1rem; }
        .freshness-note {
            display: block;
            text-align: center;
            font-style: italic;
            color: var(--text-muted);
            font-size: 13px;
            margin-bottom: 1.5rem;
        }
        .facts-table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 1rem;
        }
        .facts-table tr { border-bottom: 1px solid var(--border-color); }
        .facts-table td { padding: 12px; font-size: 15px; }
        .facts-table td:first-child { color: var(--text-secondary); font-weight: 500; width: 40%; }
        .facts-table td:last-child { color: var(--text-primary); text-align: right; }
        .terms-link-wrap { text-align: center; font-size: 13px; }
        .terms-link { color: var(--text-muted); text-decoration: underline; }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 10px;
            padding: 1rem 0;
            margin-bottom: 2rem;
            scrollbar-width: none;
        }
        .toc-nav::-webkit-scrollbar { display: none; }
        .toc-link {
            background: var(--elevated-bg);
            color: var(--text-secondary);
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            font-size: 14px;
            border: 1px solid var(--border-color);
        }

        .promo-section { margin: 3rem 0; }
        .promo-card {
            background: var(--surface-bg);
            border: 1px solid var(--border-brand);
            padding: 2rem;
            border-radius: var(--radius-lg);
            margin-bottom: 1.5rem;
            position: relative;
        }
        .promo-card h3 { color: var(--brand-color); margin-top: 0; }
        .promo-card p { color: var(--text-secondary); margin-bottom: 1.5rem; }
        .promo-btn {
            display: inline-block;
            padding: 12px 24px;
            background: var(--brand-color);
            color: var(--primary-bg);
            border-radius: var(--radius-md);
            font-weight: 600;
        }

        .usp-bar {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            margin: 3rem 0;
        }
        .usp-tile {
            display: flex;
            gap: 15px;
            background: var(--surface-bg);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            border-left: 4px solid var(--brand-color);
        }
        .usp-tile i { font-size: 1.5rem; color: var(--brand-color); }
        .usp-tile strong { display: block; color: var(--text-primary); margin-bottom: 5px; }
        .usp-tile p { margin: 0; font-size: 14px; color: var(--text-secondary); }

        .payment-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin: 2rem 0;
        }
        .pay-card {
            background: var(--surface-bg);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            text-align: center;
            border: 1px solid var(--border-color);
        }
        .pay-card i { font-size: 2rem; color: var(--brand-color); margin-bottom: 10px; }
        .pay-card strong { display: block; margin-bottom: 10px; }
        .pay-card p { font-size: 13px; color: var(--text-secondary); margin: 0; }

        .guide-steps { margin: 2rem 0; }
        .step-item {
            display: flex;
            gap: 20px;
            margin-bottom: 2rem;
            align-items: flex-start;
        }
        .step-num {
            background: var(--brand-color);
            color: var(--primary-bg);
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            flex-shrink: 0;
        }
        .step-content h3 { margin: 0 0 10px 0; }
        .step-content h3 a { color: inherit; }

        .download-section {
            background: var(--surface-bg);
            padding: 2rem;
            border-radius: var(--radius-lg);
            text-align: center;
            margin: 3rem 0;
            border: 1px solid var(--border-color);
        }
        .download-btn {
            display: inline-block;
            background: var(--brand-color);
            color: var(--primary-bg);
            padding: 16px 32px;
            border-radius: var(--radius-md);
            font-weight: 700;
            margin-top: 1rem;
        }

        .player-guide { margin: 3rem 0; }
        .guide-card {
            background: var(--surface-bg);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            border: 1px solid var(--border-color);
        }
        .guide-meta { font-size: 12px; color: var(--text-muted); margin-bottom: 10px; display: block; }

        .announcement-list { margin: 3rem 0; }
        .announcement-item {
            display: flex;
            gap: 15px;
            padding: 1.5rem;
            background: var(--surface-bg);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            border: 1px solid var(--border-color);
        }
        .announcement-item i { color: var(--brand-color); margin-top: 5px; }
        .announcement-date { font-size: 12px; color: var(--text-muted); display: block; margin-top: 10px; }

        .faq-section { margin: 3rem 0; }
        .faq-item {
            background: var(--surface-bg);
            margin-bottom: 10px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }
        .faq-item summary { padding: 15px; cursor: pointer; list-style: none; }
        .faq-item summary h3 { margin: 0; font-size: 16px; display: flex; justify-content: space-between; align-items: center; }
        .faq-item p { padding: 0 15px 15px; color: var(--text-secondary); margin: 0; }

        .about-panel {
            background: var(--surface-bg);
            padding: 2rem;
            border-radius: var(--radius-lg);
            margin: 3rem 0;
            border: 1px solid var(--border-color);
        }
        .team-card {
            background: var(--elevated-bg);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            margin-top: 2rem;
            border: 1px solid var(--border-brand);
        }

        .security-section {
            padding: 2rem;
            background: var(--surface-bg);
            border-radius: var(--radius-lg);
            margin: 3rem 0;
            text-align: center;
        }
        .security-links { display: flex; justify-content: center; gap: 20px; margin: 1.5rem 0; }
        .security-links a { color: var(--text-secondary); font-size: 14px; text-decoration: underline; }

        footer {
            background: var(--surface-bg);
            padding: 3rem 0;
            margin-top: 4rem;
            border-top: 1px solid var(--border-color);
            text-align: center;
        }
        .footer-sitemap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
            max-width: 800px;
            margin: 0 auto 2rem;
            text-align: left;
        }
        .footer-sitemap a { color: var(--text-secondary); font-size: 14px; }
        .footer-contact { margin-bottom: 2rem; }
        .footer-legal { font-size: 13px; color: var(--text-muted); max-width: 700px; margin: 0 auto; }

        .navigator {
            position: fixed;
            inset-inline: 0;
            bottom: 0;
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            display: flex;
            justify-content: space-around;
            padding: 10px 0 calc(10px + env(safe-area-inset-bottom));
            border-top: 1px solid var(--border-brand);
            z-index: 1000;
        }
        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            color: var(--text-secondary);
            font-size: 11px;
            text-align: center;
        }
        .nav-item i { font-size: 20px; color: var(--brand-color); }

        @media (min-width: 768px) {
            body { padding-inline: 24px; padding-bottom: 24px; }
            .category-hub { grid-template-columns: repeat(3, 1fr); }
            .game-grid { grid-template-columns: repeat(4, 1fr); }
            .payment-grid { grid-template-columns: repeat(4, 1fr); }
            .usp-bar { grid-template-columns: repeat(2, 1fr); }
            .navigator { position: static; display: none; }
            .footer-sitemap { grid-template-columns: repeat(5, 1fr); }
        }

        @media (min-width: 1200px) {
            body { padding-inline: 32px; max-width: 1200px; margin-inline: auto; }
            .category-hub { grid-template-columns: repeat(4, 1fr); }
        }

        section { content-visibility: auto; contain-intrinsic-size: 500px; }
        .utility-link { color: var(--brand-color); font-weight: 600; text-decoration: underline; }
        .radius-pill { border-radius: 9999px; }