:root {
            --color-primary: #0D2542;
            --color-primary-hover: #163A66;
            --color-secondary: #C0C0C8;
            --color-secondary-hover: #E0E0E8;
            --color-accent: #00F5FF;
            --color-bg-main: #040B1A;
            --color-bg-surface: #0A152C;
            --color-bg-elevated: #122141;
            --color-text-primary: #E6F1FF;
            --color-text-secondary: #B0C4DE;
            --color-text-muted: #78909C;
            --color-btn-bg: #00F5FF;
            --color-btn-text: #040B1A;
            --color-btn-hover: #7DF9FF;
            --color-border-default: #1C2F52;
            --color-border-brand: #00F5FF4D;
            --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, #0D2542 0%, #00F5FF 100%);
            --grad-hero: radial-gradient(circle at top right, #163A66 0%, #040B1A 70%);
            --grad-btn: linear-gradient(180deg, #00F5FF 0%, #00D1DB 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(--color-bg-main);
            color: var(--color-text-primary);
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            min-inline-size: 44px;
            padding: 12px 18px;
            border-radius: var(--radius-md);
            text-decoration: none;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, background 0.2s;
            border: none;
            text-align: center;
        }

        .btn-primary {
            background: var(--grad-btn);
            color: var(--color-btn-text);
            box-shadow: 0 0 15px rgba(0, 245, 255, 0.3);
        }
        .btn-primary:hover { background: var(--color-btn-hover); transform: translateY(-2px); }

        .btn-outline {
            background: transparent;
            color: var(--color-text-primary);
            border: 1px solid var(--color-border-brand);
        }
        .btn-outline:hover { background: var(--color-border-brand); }

        h1 { font-family: 'Be Vietnam Pro', sans-serif; font-size: clamp(1.6rem, 6.5vw, 2.4rem); line-height: 1.2; margin: 0 0 1rem; color: var(--color-accent); }
        h2 { font-family: 'Be Vietnam Pro', sans-serif; font-size: clamp(1.3rem, 5.2vw, 1.8rem); line-height: 1.25; margin-top: 2.5rem; margin-bottom: 1.25rem; color: var(--color-text-primary); }
        h3 { font-family: 'Be Vietnam Pro', sans-serif; font-size: clamp(1.05rem, 4.2vw, 1.25rem); line-height: 1.3; margin: 0 0 0.5rem; color: var(--color-text-primary); }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid var(--color-border-default);
            margin-bottom: 2rem;
        }
        .header-logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: inherit; }
        .header-logo strong { font-size: 16px; font-weight: 400; }
        .header-actions { display: flex; gap: 10px; }

        main { width: 100%; }

        .hero-section {
            background: var(--grad-hero);
            padding: 2rem 1.5rem;
            border-radius: var(--radius-lg);
            text-align: center;
            margin-bottom: 2rem;
            border: 1px solid var(--color-border-brand);
        }
        .hero-intro { color: var(--color-text-secondary); margin-bottom: 2rem; text-align: left; }
        .hero-cta { display: block; width: 100%; box-sizing: border-box; margin-bottom: 1.5rem; }
        .hero-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
        .hero-tag {
            background: var(--color-bg-elevated);
            color: var(--color-accent);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            border: 1px solid var(--color-border-brand);
        }

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

        .category-hub {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-bottom: 2rem;
        }
        .category-tile {
            background: var(--color-bg-surface);
            padding: 1.5rem 1rem;
            border-radius: var(--radius-md);
            text-decoration: none;
            color: inherit;
            text-align: center;
            border: 1px solid var(--color-border-default);
            transition: border-color 0.3s;
        }
        .category-tile:hover { border-color: var(--color-accent); }
        .category-tile i { font-size: 2rem; color: var(--color-accent); margin-bottom: 0.5rem; display: block; }
        .category-tile strong { display: block; margin-bottom: 4px; }
        .category-tile span { font-size: 0.85rem; color: var(--color-text-muted); }

        .game-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-bottom: 2rem;
        }
        .game-card {
            background: var(--color-bg-surface);
            border-radius: var(--radius-md);
            text-decoration: none;
            color: inherit;
            border: 1px solid var(--color-border-default);
            overflow: hidden;
            transition: transform 0.2s;
        }
        .game-card:hover { transform: scale(1.02); border-color: var(--color-accent); }
        .game-card img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
        .game-card-body { padding: 12px; text-align: center; }
        .game-card-body h3 { font-size: 1rem; margin: 0; }

        .facts-wrap {
            background: var(--color-bg-surface);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            border: 1px solid var(--color-border-default);
            margin-bottom: 2rem;
        }
        .freshness-notice {
            font-style: italic;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-bottom: 1rem;
            display: block;
        }
        .facts-table { width: 100%; border-collapse: collapse; margin-bottom: 1rem; }
        .facts-table tr { border-bottom: 1px solid var(--color-border-default); }
        .facts-table td { padding: 12px 8px; font-size: 0.9rem; }
        .facts-label { color: var(--color-text-secondary); width: 40%; }
        .facts-value { color: var(--color-text-primary); font-weight: 500; }
        .terms-link-wrap { text-align: center; font-size: 0.8rem; }
        .terms-link-wrap a { color: var(--color-text-muted); text-decoration: underline; }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 12px;
            padding: 10px 0;
            margin-bottom: 2rem;
            scrollbar-width: none;
        }
        .toc-nav::-webkit-scrollbar { display: none; }
        .toc-link {
            white-space: nowrap;
            color: var(--color-text-secondary);
            text-decoration: none;
            font-size: 0.9rem;
            padding: 6px 12px;
            background: var(--color-bg-elevated);
            border-radius: var(--radius-pill);
            border: 1px solid var(--color-border-default);
        }
        .toc-link:hover { color: var(--color-accent); border-color: var(--color-accent); }

        .promo-list { display: flex; flex-direction: column; gap: 16px; margin-bottom: 2rem; }
        .promo-card {
            background: var(--color-bg-surface);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            border-left: 4px solid var(--color-accent);
            border-top: 1px solid var(--color-border-default);
            border-right: 1px solid var(--color-border-default);
            border-bottom: 1px solid var(--color-border-default);
        }
        .promo-card h3 { margin-bottom: 0.5rem; }
        .promo-card p { color: var(--color-text-secondary); font-size: 0.95rem; margin-bottom: 1.25rem; }

        .usp-grid { display: flex; flex-direction: column; gap: 16px; margin-bottom: 2rem; }
        .usp-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 1rem;
            background: var(--color-bg-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-default);
        }
        .usp-item i { font-size: 1.5rem; color: var(--color-accent); margin-top: 4px; }
        .usp-content strong { display: block; font-size: 1.05rem; margin-bottom: 4px; }
        .usp-content p { margin: 0; font-size: 0.9rem; color: var(--color-text-secondary); }

        .payment-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-bottom: 2rem;
        }
        .pay-card {
            background: var(--color-bg-surface);
            padding: 1.25rem 1rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-default);
            text-align: center;
        }
        .pay-card i { font-size: 1.8rem; color: var(--color-accent); margin-bottom: 8px; display: block; }
        .pay-card strong { display: block; margin-bottom: 6px; font-size: 0.95rem; }
        .pay-card p { margin: 0; font-size: 0.8rem; color: var(--color-text-muted); line-height: 1.4; }

        .guide-steps { display: flex; flex-direction: column; gap: 20px; margin-bottom: 2rem; }
        .step-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--color-bg-surface);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-default);
        }
        .step-num {
            min-width: 36px;
            height: 36px;
            background: var(--color-accent);
            color: var(--color-bg-main);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }
        .step-content h3 { margin-bottom: 8px; }
        .step-content h3 a { color: inherit; text-decoration: none; }
        .step-content p { margin: 0; color: var(--color-text-secondary); font-size: 0.9rem; }

        .download-box {
            background: var(--color-bg-surface);
            padding: 2rem 1.5rem;
            border-radius: var(--radius-lg);
            text-align: center;
            border: 1px solid var(--color-border-brand);
            margin-bottom: 2rem;
        }
        .download-box p { margin-bottom: 1.5rem; color: var(--color-text-secondary); }

        .player-guide-list { display: flex; flex-direction: column; gap: 16px; margin-bottom: 2rem; }
        .guide-card {
            background: var(--color-bg-surface);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-default);
        }
        .guide-meta { font-size: 0.75rem; color: var(--color-text-muted); margin-bottom: 12px; display: block; }

        .announcement-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 2rem; }
        .announcement-item {
            display: flex;
            gap: 12px;
            padding: 1rem;
            background: var(--color-bg-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-default);
        }
        .announcement-item i { color: var(--color-accent); margin-top: 4px; }
        .announcement-content h3 { font-size: 1rem; margin: 0 0 6px; }
        .announcement-content p { margin: 0 0 8px; font-size: 0.85rem; color: var(--color-text-secondary); }
        .announcement-date { font-size: 0.75rem; color: var(--color-text-muted); }

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

        .about-box {
            background: var(--color-bg-surface);
            padding: 2rem 1.5rem;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-default);
            margin-bottom: 2rem;
        }
        .team-card {
            margin-top: 2rem;
            padding: 1.5rem;
            background: var(--color-bg-elevated);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-brand);
        }
        .team-card h3 { margin-bottom: 12px; }
        .team-card p { margin: 0 0 12px; font-size: 0.9rem; color: var(--color-text-secondary); }

        .security-box {
            background: var(--color-bg-surface);
            padding: 2rem 1.5rem;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-default);
            margin-bottom: 2rem;
        }
        .security-links { display: flex; flex-wrap: wrap; gap: 12px; margin: 1.5rem 0; }
        .security-links a {
            color: var(--color-accent);
            text-decoration: none;
            font-size: 0.9rem;
            padding: 4px 12px;
            border: 1px solid var(--color-accent);
            border-radius: var(--radius-pill);
        }

        footer {
            background: var(--color-bg-surface);
            padding: 3rem 1.5rem 5rem;
            border-top: 1px solid var(--color-border-default);
            text-align: center;
        }
        .footer-sitemap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 2.5rem;
            text-align: left;
        }
        .footer-sitemap a { color: var(--color-text-secondary); text-decoration: none; font-size: 0.9rem; }
        .footer-sitemap a:hover { color: var(--color-accent); }
        .footer-contact { margin-bottom: 2rem; font-size: 0.9rem; }
        .footer-contact a { color: var(--color-accent); text-decoration: none; }
        .footer-legal { font-size: 0.8rem; color: var(--color-text-muted); line-height: 1.6; }

        .navigator {
            position: fixed;
            inset-inline: 0;
            bottom: 0;
            height: 72px;
            background: var(--color-bg-surface);
            border-top: 1px solid var(--color-border-default);
            display: flex;
            justify-content: space-around;
            align-items: center;
            padding-bottom: env(safe-area-inset-bottom);
            z-index: 1000;
            backdrop-filter: blur(10px);
        }
        .nav-item {
            text-decoration: none;
            color: var(--color-text-secondary);
            display: flex;
            flex-direction: column;
            align-items: center;
            font-size: 0.75rem;
            gap: 4px;
        }
        .nav-item i { font-size: 1.2rem; }
        .nav-item:hover { color: var(--color-accent); }

        .utility-link { display: inline-block; margin-top: 1rem; color: var(--color-accent); text-decoration: none; font-size: 0.9rem; font-weight: 500; }

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

        @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); }
            .navigator { position: static; height: auto; padding: 2rem 0; border-top: 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); }
            .game-grid { grid-template-columns: repeat(4, 1fr); }
        }