:root {
            --brand-primary: #007BFF;
            --brand-primary-hover: #3395FF;
            --brand-secondary: #C0C0C8;
            --brand-accent: #00F5FF;
            --bg-main: #050A18;
            --bg-surface: #0D152B;
            --bg-elevated: #162141;
            --bg-overlay: rgba(5, 10, 24, 0.8);
            --text-primary: #F0F4FF;
            --text-secondary: #B0B8D1;
            --text-muted: #7A86A3;
            --text-link: #00F5FF;
            --text-link-hover: #33DFFF;
            --btn-bg: #007BFF;
            --btn-text: #FFFFFF;
            --btn-hover-bg: #00F5FF;
            --btn-hover-text: #050A18;
            --border-default: #1D2B53;
            --border-brand: #00F5FF;
            --radius-sm: 4px;
            --radius-md: 12px;
            --radius-lg: 24px;
            --radius-pill: 9999px;
            --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
            --grad-brand: linear-gradient(135deg, #007BFF 0%, #00F5FF 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;
            color: var(--text-primary);
            background-color: var(--bg-main);
            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 { color: var(--text-link); text-decoration: none; transition: color 0.2s; }
        a:hover { color: var(--text-link-hover); }

        .btn-base {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            min-inline-size: 44px;
            padding: 12px 18px;
            border-radius: var(--radius-md);
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            border: none;
            text-align: center;
        }

        .btn-primary {
            background: var(--btn-bg);
            color: var(--btn-text);
        }
        .btn-primary:hover {
            background: var(--btn-hover-bg);
            color: var(--btn-hover-text);
        }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-default);
        }

        .header-logo-link {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .header-brand-name {
            font-size: 16px;
            font-weight: normal;
            color: var(--text-primary);
        }

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

        main {
            width: 100%;
        }

        .hero-section {
            padding: 40px 0;
            text-align: center;
        }
        h1 {
            font-family: 'Be Vietnam Pro', sans-serif;
            font-size: clamp(1.6rem, 6.5vw, 2.4rem);
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        .hero-intro {
            max-width: 800px;
            margin: 0 auto 30px;
            color: var(--text-secondary);
        }
        .hero-cta {
            display: block;
            width: 100%;
            max-width: 400px;
            margin: 0 auto 24px;
            font-size: 1.2rem;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px;
        }
        .tag-pill {
            background: var(--bg-elevated);
            border: 1px solid var(--border-default);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        .banner-wrapper {
            display: block;
            width: 100%;
            margin: 20px 0;
        }
        .banner-img {
            width: 100%;
            aspect-ratio: 2 / 1;
            object-fit: cover;
            border-radius: var(--radius-md);
        }

        .cat-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin: 30px 0;
        }
        .cat-tile {
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            padding: 20px;
            border-radius: var(--radius-md);
            text-align: center;
            transition: transform 0.2s;
        }
        .cat-tile:hover { transform: translateY(-5px); border-color: var(--brand-accent); }
        .cat-tile i { font-size: 2rem; color: var(--brand-accent); margin-bottom: 12px; }
        .cat-tile-title { display: block; color: var(--text-primary); font-weight: 600; margin-bottom: 8px; }
        .cat-tile-desc { font-size: 0.85rem; color: var(--text-muted); display: block; }

        h2 {
            font-family: 'Be Vietnam Pro', sans-serif;
            font-size: clamp(1.3rem, 5.2vw, 1.8rem);
            line-height: 1.25;
            margin-top: 3rem;
            margin-bottom: 1.5rem;
            color: var(--text-primary);
            border-left: 4px solid var(--brand-primary);
            padding-left: 15px;
        }
        h3 {
            font-family: 'Be Vietnam Pro', sans-serif;
            font-size: clamp(1.05rem, 4.2vw, 1.25rem);
            line-height: 1.3;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .game-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }
        .game-card {
            background: var(--bg-surface);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-default);
            transition: border-color 0.3s;
        }
        .game-card:hover { border-color: var(--brand-accent); }
        .game-card img { aspect-ratio: 1 / 1; object-fit: cover; }
        .game-card h3 {
            padding: 12px;
            margin: 0;
            font-size: 1rem;
            text-align: center;
            color: var(--text-primary);
        }

        .facts-container {
            background: var(--bg-surface);
            border-radius: var(--radius-md);
            padding: 20px;
            margin: 20px 0;
            border: 1px solid var(--border-default);
        }
        .freshness-notice {
            font-style: italic;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 15px;
            display: block;
        }
        .facts-table {
            width: 100%;
            border-collapse: collapse;
        }
        .facts-table tr { border-bottom: 1px solid var(--border-default); }
        .facts-table td { padding: 12px 0; color: var(--text-secondary); }
        .facts-label { font-weight: 600; color: var(--text-primary); width: 40%; }
        .facts-link {
            display: block;
            text-align: center;
            margin-top: 15px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 10px;
            padding: 10px 0;
            margin: 20px 0;
            scrollbar-width: none;
        }
        .toc-nav::-webkit-scrollbar { display: none; }
        .toc-link {
            background: var(--bg-elevated);
            white-space: nowrap;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            font-size: 0.9rem;
            border: 1px solid var(--border-default);
        }

        .promo-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .promo-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-lg);
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 15px;
            box-shadow: var(--shadow-card);
        }
        .promo-body { color: var(--text-secondary); font-size: 0.95rem; }

        .usp-grid {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin: 30px 0;
        }
        .usp-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            background: var(--bg-elevated);
            padding: 15px;
            border-radius: var(--radius-md);
        }
        .usp-item i { font-size: 1.5rem; color: var(--brand-accent); }
        .usp-content strong { display: block; color: var(--text-primary); margin-bottom: 4px; }
        .usp-content span { font-size: 0.9rem; color: var(--text-secondary); }

        .pay-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }
        .pay-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            padding: 15px;
            border-radius: var(--radius-md);
            text-align: center;
        }
        .pay-card i { font-size: 1.8rem; color: var(--text-primary); margin-bottom: 10px; }
        .pay-card strong { display: block; margin-bottom: 8px; color: var(--text-primary); }
        .pay-card p { font-size: 0.8rem; color: var(--text-muted); margin: 0; }

        .guide-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .step-item {
            display: flex;
            gap: 15px;
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }
        .step-badge {
            min-width: 32px;
            height: 32px;
            background: var(--grad-brand);
            color: var(--bg-main);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }
        .step-item h3 a { color: inherit; text-decoration: none; }

        .download-box {
            background: var(--bg-elevated);
            padding: 30px;
            border-radius: var(--radius-lg);
            text-align: center;
            border: 1px solid var(--border-brand);
        }
        .download-text { margin-bottom: 20px; color: var(--text-secondary); }

        .player-guides {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .guide-card {
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }
        .guide-meta { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 10px; display: block; }

        .announcement-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .announcement-card {
            display: flex;
            gap: 15px;
            background: var(--bg-surface);
            padding: 15px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }
        .announcement-card i { color: var(--brand-accent); margin-top: 5px; }
        .announcement-date { font-size: 0.8rem; color: var(--text-muted); display: block; margin-top: 8px; }

        .faq-section {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        details {
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            padding: 10px;
        }
        summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            color: var(--text-primary);
        }
        summary::-webkit-details-marker { display: none; }
        .faq-answer { padding: 15px 10px 10px; color: var(--text-secondary); border-top: 1px solid var(--border-default); margin-top: 10px; }

        .about-box {
            background: var(--bg-surface);
            padding: 25px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
        }
        .team-card {
            margin-top: 20px;
            padding: 20px;
            background: var(--bg-elevated);
            border-radius: var(--radius-md);
            border-left: 4px solid var(--brand-accent);
        }

        .security-box {
            background: var(--bg-elevated);
            padding: 25px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }
        .security-list {
            list-style: none;
            padding: 0;
            margin: 20px 0;
        }
        .security-list li {
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
        }
        .security-list li i { color: var(--brand-accent); }

        footer {
            margin-top: 50px;
            padding: 40px 0;
            border-top: 1px solid var(--border-default);
            text-align: center;
        }
        .footer-sitemap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
            margin-bottom: 30px;
        }
        .footer-sitemap a { font-size: 0.9rem; color: var(--text-secondary); }
        .footer-contact { margin-bottom: 20px; color: var(--text-secondary); }
        .footer-legal { font-size: 0.85rem; color: var(--text-muted); }

        .navigator {
            position: fixed;
            inset-inline: 0;
            bottom: 0;
            height: 72px;
            background: var(--bg-surface);
            border-top: 1px solid var(--border-default);
            display: flex;
            justify-content: space-around;
            align-items: center;
            padding-bottom: env(safe-area-inset-bottom);
            z-index: 1000;
        }
        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            font-size: 0.75rem;
            color: var(--text-secondary);
        }
        .nav-item i { font-size: 1.2rem; }

        .utility-link {
            display: inline-block;
            margin-top: 10px;
            font-weight: 600;
            color: var(--brand-accent);
        }

        section {
            content-visibility: auto;
            contain-intrinsic-size: 1px 500px;
        }

        @media (min-width: 768px) {
            body { padding-inline: 24px; padding-bottom: 24px; }
            .cat-grid { grid-template-columns: repeat(3, 1fr); }
            .game-grid { grid-template-columns: repeat(3, 1fr); }
            .pay-grid { grid-template-columns: repeat(4, 1fr); }
            .navigator { position: static; height: auto; padding: 0; display: none; }
            footer { padding-bottom: 24px; }
        }

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