:root {
            --color-primary: #0A2463;
            --color-primary-hover: #12358F;
            --color-secondary: #C0C0C8;
            --color-secondary-hover: #E0E0E8;
            --color-accent: #00F5FF;
            --color-bg-main: #050B1A;
            --color-bg-surface: #0C152B;
            --color-bg-elevated: #15203D;
            --color-text-primary: #E6EBF5;
            --color-text-secondary: #B0B8C9;
            --color-text-muted: #7A869A;
            --color-btn-bg: #00F5FF;
            --color-btn-text: #050B1A;
            --color-btn-hover: #70F9FF;
            --color-border: #1E2B4A;
            --color-border-strong: #2D3D63;
            --color-border-brand: rgba(0, 245, 255, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-pill: 9999px;
            --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
            --shadow-glow: 0 0 20px rgba(0, 245, 255, 0.4);
            --grad-brand: linear-gradient(135deg, #0A2463 0%, #00F5FF 100%);
            --grad-hero: radial-gradient(circle at center, #15203D 0%, #050B1A 100%);
            --grad-btn: linear-gradient(180deg, #00F5FF 0%, #00D1DB 100%);
        }

        html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
        body {
            margin: 0;
            font-family: 'Manrope', 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);
        }
        h1, h2, h3 { font-family: 'Be Vietnam Pro', sans-serif; color: var(--color-text-primary); line-height: 1.2; margin-top: 2rem; }
        h1 { font-size: clamp(1.6rem, 6.5vw, 2.4rem); text-align: center; margin-bottom: 1rem; }
        h2 { font-size: clamp(1.3rem, 5.2vw, 1.8rem); text-align: center; }
        h3 { font-size: clamp(1.05rem, 4.2vw, 1.25rem); line-height: 1.3; }
        a { text-decoration: none; color: inherit; transition: color 0.3s ease; }
        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 24px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
            text-align: center;
        }
        .btn-primary { background: var(--grad-btn); color: var(--color-btn-text); box-shadow: var(--shadow-glow); }
        .btn-primary:hover { background: var(--color-btn-hover); transform: translateY(-2px); }
        .btn-outline { border: 1px solid var(--color-accent); color: var(--color-accent); background: transparent; }
        .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);
        }
        .header-brand { display: flex; align-items: center; gap: 10px; }
        .header-brand 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: var(--grad-hero);
            border-radius: var(--radius-lg);
            margin-bottom: 24px;
        }
        .hero-intro { max-width: 700px; margin: 0 auto 24px; padding-inline: 16px; color: var(--color-text-secondary); }
        .hero-cta { display: block; width: 100%; max-width: 300px; margin: 0 auto 24px; }
        .hero-tags { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; }
        .tag-pill {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--color-border-brand);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            color: var(--color-accent);
        }

        .banner-wrap { margin-bottom: 24px; }
        .banner-wrap 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: 16px;
            margin-bottom: 40px;
        }
        .cat-tile {
            background: var(--color-bg-surface);
            border: 1px solid var(--color-border);
            padding: 20px;
            border-radius: var(--radius-md);
            text-align: center;
            backdrop-filter: blur(10px);
            transition: transform 0.3s ease;
        }
        .cat-tile:hover { transform: scale(1.02); border-color: var(--color-accent); }
        .cat-tile i { font-size: 2rem; color: var(--color-accent); margin-bottom: 12px; }
        .cat-tile strong { display: block; margin-bottom: 8px; font-size: 1.1rem; }
        .cat-tile span { font-size: 0.85rem; color: var(--color-text-muted); display: block; }

        .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: all 0.3s ease;
        }
        .game-card:hover { border-color: var(--color-accent); transform: translateY(-5px); box-shadow: var(--shadow-card); }
        .game-card img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
        .game-card h3 { font-size: 1rem; margin: 12px; text-align: center; color: var(--color-text-primary); }

        .facts-section {
            background: var(--color-bg-surface);
            padding: 24px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            margin-bottom: 40px;
        }
        .facts-notice { font-style: italic; color: var(--color-text-muted); font-size: 0.9rem; text-align: center; margin-bottom: 20px; }
        .facts-table { width: 100%; border-collapse: collapse; margin-bottom: 16px; }
        .facts-table td { padding: 12px; border-bottom: 1px solid var(--color-border); }
        .facts-table td:first-child { font-weight: 600; color: var(--color-accent); width: 40%; }
        .facts-link { display: block; text-align: center; font-size: 0.85rem; color: var(--color-text-secondary); }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 12px;
            padding: 16px 0;
            margin-bottom: 40px;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .toc-nav::-webkit-scrollbar { display: none; }
        .toc-link {
            white-space: nowrap;
            background: var(--color-bg-elevated);
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--color-border);
            font-size: 0.9rem;
            color: var(--color-text-secondary);
        }
        .toc-link:hover { color: var(--color-accent); border-color: var(--color-accent); }

        .promo-container { display: flex; flex-direction: column; gap: 20px; margin-bottom: 40px; }
        .promo-card {
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border-strong);
            padding: 24px;
            border-radius: var(--radius-lg);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .promo-card h3 { margin-top: 0; color: var(--color-accent); }
        .promo-card p { margin: 0; color: var(--color-text-secondary); }

        .usp-bar {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            margin-bottom: 40px;
        }
        .usp-tile {
            background: rgba(20, 32, 61, 0.5);
            border-left: 4px solid var(--color-accent);
            padding: 20px;
            border-radius: var(--radius-sm);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .usp-tile i { font-size: 1.5rem; color: var(--color-accent); margin-top: 4px; }
        .usp-content strong { display: block; font-size: 1.1rem; margin-bottom: 4px; }
        .usp-content p { margin: 0; font-size: 0.9rem; color: var(--color-text-muted); }

        .step-list { display: flex; flex-direction: column; gap: 24px; margin-bottom: 40px; }
        .step-item { display: flex; gap: 20px; align-items: flex-start; }
        .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: 700;
            flex-shrink: 0;
        }
        .step-item h3 { margin: 0 0 8px 0; font-size: 1.1rem; }
        .step-item h3 a { color: inherit; }

        .pay-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-bottom: 40px;
        }
        .pay-card {
            background: var(--color-bg-surface);
            border: 1px solid var(--color-border);
            padding: 20px;
            border-radius: var(--radius-md);
            text-align: center;
        }
        .pay-card i { font-size: 2rem; color: var(--color-accent); margin-bottom: 12px; }
        .pay-card strong { display: block; margin-bottom: 8px; }
        .pay-card p { font-size: 0.85rem; color: var(--color-text-muted); margin: 0; }

        .guide-item {
            background: var(--color-bg-surface);
            border: 1px solid var(--color-border);
            padding: 20px;
            border-radius: var(--radius-md);
            margin-bottom: 16px;
        }
        .guide-meta { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 12px; display: block; }

        .announcement-list { display: flex; flex-direction: column; gap: 16px; margin-bottom: 40px; }
        .announcement-item {
            background: var(--color-bg-elevated);
            padding: 20px;
            border-radius: var(--radius-md);
            border-left: 3px solid var(--color-accent);
            display: flex;
            gap: 16px;
        }
        .announcement-item i { color: var(--color-accent); margin-top: 4px; }
        .announcement-content h3 { margin: 0 0 8px 0; font-size: 1.1rem; }
        .announcement-content p { margin: 0 0 8px 0; font-size: 0.9rem; color: var(--color-text-secondary); }
        .announcement-date { font-size: 0.8rem; color: var(--color-text-muted); }

        .faq-container { display: flex; flex-direction: column; gap: 12px; margin-bottom: 40px; }
        .faq-item { background: var(--color-bg-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
        .faq-item summary { padding: 16px; cursor: pointer; list-style: none; }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary h3 { margin: 0; font-size: 1rem; text-align: left; }
        .faq-answer { padding: 0 16px 16px; color: var(--color-text-secondary); font-size: 0.95rem; }

        .about-section { background: var(--color-bg-surface); padding: 32px; border-radius: var(--radius-lg); margin-bottom: 40px; }
        .team-card {
            background: var(--color-bg-elevated);
            padding: 24px;
            border-radius: var(--radius-md);
            margin-top: 24px;
            border: 1px solid var(--color-border-strong);
        }
        .team-card h3 { margin-top: 0; color: var(--color-accent); }
        .team-card p { margin-bottom: 8px; font-size: 0.9rem; color: var(--color-text-secondary); }

        .security-section { padding: 32px 0; border-top: 1px solid var(--color-border); margin-bottom: 40px; }
        .security-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-bottom: 24px; }
        .security-box { background: var(--color-bg-surface); padding: 20px; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
        .security-box h3 { margin: 0 0 12px 0; font-size: 1.1rem; }

        footer {
            background: var(--color-bg-surface);
            padding: 40px 0 24px;
            border-top: 1px solid var(--color-border);
            text-align: center;
        }
        .footer-sitemap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 32px;
            text-align: left;
        }
        .footer-sitemap a { font-size: 0.85rem; color: var(--color-text-secondary); }
        .footer-contact { margin-bottom: 24px; font-size: 0.9rem; }
        .footer-legal { font-size: 0.8rem; color: var(--color-text-muted); line-height: 1.5; }

        .navigator {
            position: fixed;
            inset-inline: 0;
            bottom: 0;
            height: 72px;
            background: rgba(12, 21, 43, 0.95);
            backdrop-filter: blur(10px);
            display: flex;
            justify-content: space-around;
            align-items: center;
            border-top: 1px solid var(--color-border);
            padding-bottom: env(safe-area-inset-bottom);
            z-index: 1000;
        }
        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            color: var(--color-text-secondary);
            font-size: 0.75rem;
            text-decoration: none;
        }
        .nav-item i { font-size: 1.2rem; }
        .nav-item:hover { color: var(--color-accent); }

        .util-link { display: inline-block; margin-top: 16px; color: var(--color-accent); font-weight: 500; }

        section { content-visibility: auto; contain-intrinsic-size: 1px 500px; margin-bottom: 48px; }

        @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); }
            .usp-bar { grid-template-columns: repeat(3, 1fr); }
            .step-list { flex-direction: row; }
            .step-item { flex-direction: column; text-align: center; align-items: center; }
            .navigator { display: none; }
        }

        @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(7, 1fr); }
        }