:root {
            --color-brand-primary: #007BFF;
            --color-brand-hover: #3395FF;
            --color-brand-accent: #00F5FF;
            --color-bg-main: #050B18;
            --color-bg-surface: #0D162B;
            --color-bg-elevated: #16223D;
            --color-text-primary: #F1F5F9;
            --color-text-secondary: #94A3B8;
            --color-text-muted: #64748B;
            --color-btn-bg: #00F5FF;
            --color-btn-text: #050B18;
            --color-btn-hover: #66FFFF;
            --color-border: #1E293B;
            --color-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);
            --glow-cyan: 0 0 15px rgba(0, 245, 255, 0.4);
            --grad-brand: linear-gradient(135deg, #007BFF 0%, #00F5FF 100%);
            --grad-btn: linear-gradient(to right, #00F5FF, #00D1FF);
        }

        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));
            background-color: var(--color-bg-main);
            color: var(--color-text-primary);
            overflow-x: hidden;
        }

        img, video, iframe { max-width: 100%; height: auto; display: block; }
        a { color: var(--color-brand-accent); text-decoration: none; transition: color 0.2s ease; }
        a:hover { color: #33C1FF; }

        .btn, .cta-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            min-inline-size: 44px;
            padding: 12px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease, opacity 0.2s ease;
            border: none;
            text-align: center;
        }

        .btn-primary {
            background: var(--grad-btn);
            color: var(--color-btn-text);
            box-shadow: var(--glow-cyan);
        }

        .btn-primary:hover { transform: translateY(-2px); opacity: 0.9; }

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

        .btn-outline:hover { background: rgba(0, 245, 255, 0.1); }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(5, 11, 24, 0.9);
            backdrop-filter: blur(10px);
        }

        .header-logo { display: flex; align-items: center; gap: 8px; }
        .header-logo strong { font-size: 16px; font-weight: 400; }
        .header-actions { display: flex; gap: 12px; }

        main { width: 100%; }

        .hero-section {
            padding: 40px 0;
            text-align: center;
            background: radial-gradient(circle at top right, #16223D 0%, #050B18 100%);
        }

        h1 {
            font-size: clamp(1.6rem, 6.5vw, 2.4rem);
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--color-text-primary);
        }

        .hero-intro {
            max-width: 800px;
            margin: 0 auto 30px;
            color: var(--color-text-secondary);
            font-size: 1.1rem;
        }

        .hero-cta-wrap { margin-bottom: 30px; }
        .hero-cta-full { width: 100%; display: block; box-sizing: border-box; }

        .hero-tags {
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .tag-pill {
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border-brand);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            color: var(--color-brand-accent);
        }

        .banner-link { display: block; width: 100%; margin: 20px 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: 40px 0;
        }

        .category-tile {
            background: var(--color-bg-surface);
            border: 1px solid var(--color-border);
            padding: 20px;
            border-radius: var(--radius-md);
            text-align: center;
            transition: border-color 0.3s ease;
        }

        .category-tile:hover { border-color: var(--color-brand-accent); }
        .category-tile i { font-size: 2rem; color: var(--color-brand-accent); margin-bottom: 12px; }
        .category-tile strong { display: block; margin-bottom: 8px; font-size: 1.1rem; }
        .category-tile span { font-size: 0.85rem; color: var(--color-text-secondary); }

        .game-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-bottom: 40px;
        }

        .game-card {
            background: var(--color-bg-surface);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: transform 0.2s ease;
        }

        .game-card:hover { transform: translateY(-5px); border-color: var(--color-brand-accent); }
        .game-card img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
        .game-card h3 {
            font-size: 1rem;
            margin: 0;
            padding: 12px;
            text-align: center;
            color: var(--color-text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        h2 {
            font-size: clamp(1.3rem, 5.2vw, 1.8rem);
            line-height: 1.25;
            margin-top: 40px;
            margin-bottom: 20px;
            text-align: center;
        }

        .facts-wrap {
            background: var(--color-bg-surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--color-border);
            margin-bottom: 30px;
        }

        .freshness-notice {
            display: block;
            text-align: center;
            font-style: italic;
            color: var(--color-text-muted);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }

        .facts-table {
            width: 100%;
            border-collapse: collapse;
        }

        .facts-table tr { border-bottom: 1px solid var(--color-border); }
        .facts-table td { padding: 12px 8px; vertical-align: middle; }
        .facts-table td:first-child { color: var(--color-text-secondary); font-weight: 500; width: 40%; }
        .facts-table td:last-child { color: var(--color-text-primary); text-align: right; }

        .facts-footer {
            display: block;
            text-align: center;
            margin-top: 16px;
            font-size: 0.85rem;
        }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 12px;
            padding: 20px 0;
            scrollbar-width: none;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            margin-bottom: 40px;
        }

        .toc-nav::-webkit-scrollbar { display: none; }
        .toc-link {
            white-space: nowrap;
            background: var(--color-bg-elevated);
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            font-size: 0.9rem;
            border: 1px solid var(--color-border);
        }

        .promo-list { display: grid; gap: 20px; margin-bottom: 40px; }
        .promo-card {
            background: var(--color-bg-surface);
            padding: 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .promo-card h3 { margin: 0 0 12px; color: var(--color-brand-accent); }
        .promo-card p { margin: 0 0 20px; color: var(--color-text-secondary); }

        .usp-grid {
            display: grid;
            gap: 20px;
            margin: 40px 0;
        }

        .usp-tile {
            background: var(--color-bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            display: flex;
            gap: 16px;
            align-items: center;
            border: 1px solid var(--color-border);
        }

        .usp-tile i { font-size: 1.5rem; color: var(--color-brand-accent); }
        .usp-tile strong { display: block; font-size: 1.1rem; }
        .usp-tile span { font-size: 0.9rem; color: var(--color-text-secondary); }

        .payment-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-bottom: 40px;
        }

        .pay-card {
            background: var(--color-bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            text-align: center;
            border: 1px solid var(--color-border);
        }

        .pay-card i { font-size: 1.8rem; color: var(--color-brand-accent); margin-bottom: 12px; }
        .pay-card strong { display: block; margin-bottom: 8px; }
        .pay-card p { font-size: 0.85rem; color: var(--color-text-secondary); margin: 0; }

        .guide-steps { display: grid; gap: 20px; margin-bottom: 40px; }
        .step-item {
            background: var(--color-bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            display: flex;
            gap: 20px;
            border: 1px solid var(--color-border);
        }

        .step-num {
            min-width: 40px;
            height: 40px;
            background: var(--grad-brand);
            color: var(--color-bg-main);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        .step-content h3 { margin: 0 0 10px; font-size: 1.1rem; }
        .step-content h3 a { color: inherit; }
        .step-content p { margin: 0; color: var(--color-text-secondary); font-size: 0.95rem; }

        .download-box {
            background: var(--color-bg-surface);
            padding: 30px;
            border-radius: var(--radius-lg);
            text-align: center;
            border: 1px solid var(--color-border);
            margin-bottom: 40px;
        }

        .player-guide-list { display: grid; gap: 20px; margin-bottom: 40px; }
        .guide-item {
            background: var(--color-bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
        }

        .guide-item h3 { margin: 0 0 5px; }
        .guide-meta { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 15px; display: block; }
        .guide-item p { margin: 0; color: var(--color-text-secondary); }

        .announcement-list { display: grid; gap: 16px; margin-bottom: 40px; }
        .announcement-card {
            background: var(--color-bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            border-left: 4px solid var(--color-brand-accent);
            display: flex;
            gap: 16px;
        }

        .announcement-card i { color: var(--color-brand-accent); margin-top: 4px; }
        .announcement-info h3 { margin: 0 0 8px; font-size: 1.1rem; }
        .announcement-info p { margin: 0 0 10px; color: var(--color-text-secondary); font-size: 0.9rem; }
        .announcement-date { font-size: 0.8rem; color: var(--color-text-muted); }

        .faq-wrap { display: grid; gap: 12px; margin-bottom: 40px; }
        .faq-item { background: var(--color-bg-surface); border-radius: var(--radius-md); border: 1px solid var(--color-border); }
        .faq-item summary { padding: 16px; cursor: pointer; list-style: none; }
        .faq-item summary h3 { margin: 0; font-size: 1rem; display: flex; justify-content: space-between; align-items: center; }
        .faq-item summary h3::after { content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900; font-size: 0.8rem; }
        .faq-content { padding: 0 16px 16px; color: var(--color-text-secondary); font-size: 0.95rem; }

        .about-section {
            background: var(--color-bg-surface);
            padding: 30px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            margin-bottom: 40px;
        }

        .team-card {
            margin-top: 24px;
            padding: 20px;
            background: var(--color-bg-elevated);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
        }

        .security-section {
            background: var(--color-bg-surface);
            padding: 30px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            margin-bottom: 40px;
            text-align: center;
        }

        .security-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-bottom: 20px;
        }

        .security-item {
            padding: 15px;
            background: var(--color-bg-elevated);
            border-radius: var(--radius-md);
            font-size: 0.9rem;
        }

        footer {
            padding: 40px 0;
            border-top: 1px solid var(--color-border);
            text-align: center;
        }

        .footer-sitemap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 30px;
            text-align: left;
        }

        .footer-contact { margin-bottom: 20px; font-size: 0.9rem; }
        .footer-legal { font-size: 0.8rem; color: var(--color-text-muted); }

        .navigator {
            position: fixed;
            inset-inline: 0;
            bottom: 0;
            height: 72px;
            background: rgba(13, 22, 43, 0.95);
            backdrop-filter: blur(15px);
            display: flex;
            justify-content: space-around;
            align-items: center;
            padding-bottom: env(safe-area-inset-bottom);
            border-top: 1px solid var(--color-border);
            z-index: 2000;
        }

        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: var(--color-text-secondary);
            font-size: 0.7rem;
            gap: 4px;
        }

        .nav-item i { font-size: 1.2rem; }
        .nav-item:hover { color: var(--color-brand-accent); }

        .util-link {
            display: inline-block;
            margin-top: 10px;
            font-weight: 600;
            text-decoration: underline;
        }

        section { content-visibility: auto; contain-intrinsic-size: 1px 800px; }

        @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(3, 1fr); }
            .payment-grid { grid-template-columns: repeat(4, 1fr); }
            .security-grid { grid-template-columns: repeat(3, 1fr); }
            .navigator { display: none; }
            .hero-section { padding: 80px 0; }
        }

        @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); }
        }