:root {
            --primary: #0A2540;
            --primary-hover: #143A63;
            --secondary: #C0C0C8;
            --secondary-hover: #E0E0E8;
            --accent: #00F5FF;
            --bg-main: #040C17;
            --bg-surface: #0A1628;
            --bg-elevated: #12233D;
            --text-primary: #F0F4F8;
            --text-secondary: #B0C4DE;
            --text-muted: #64748B;
            --btn-bg: #00F5FF;
            --btn-text: #040C17;
            --btn-hover: #70F9FF;
            --border-default: #1E2F48;
            --border-accent: #00F5FF;
            --radius-md: 4px;
            --radius-lg: 8px;
            --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
            --glow: 0 0 15px rgba(0, 245, 255, 0.4);
        }
        html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
        body {
            margin: 0;
            font-family: 'Be Vietnam Pro', sans-serif;
            background-color: var(--bg-main);
            color: var(--text-primary);
            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;
        }
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-block: 12px;
            border-bottom: 1px solid var(--border-default);
        }
        .header-logo-link {
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
            color: var(--text-primary);
        }
        .header-brand-name {
            font-size: 16px;
            font-weight: normal;
        }
        .header-actions {
            display: flex;
            gap: 10px;
        }
        .btn-nav {
            text-decoration: none;
            font-family: 'Barlow Condensed', sans-serif;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            font-size: 0.9rem;
            transition: background 0.3s, color 0.3s;
        }
        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-default);
        }
        .btn-login:hover { background: var(--bg-surface); }
        .btn-register {
            background: var(--btn-bg);
            color: var(--btn-text);
        }
        .btn-register:hover { background: var(--btn-hover); }

        main { width: 100%; }
        h1, h2, h3 {
            font-family: 'Barlow Condensed', sans-serif;
            letter-spacing: -0.02em;
            line-height: 1.1;
            margin-top: 0;
        }
        h1 {
            font-size: clamp(1.6rem, 6.5vw, 2.4rem);
            font-style: italic;
            text-align: center;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        h2 {
            font-size: clamp(1.3rem, 5.2vw, 1.8rem);
            margin-bottom: 1.5rem;
            border-left: 4px solid var(--accent);
            padding-left: 12px;
            text-transform: uppercase;
        }
        h3 {
            font-size: clamp(1.05rem, 4.2vw, 1.25rem);
            color: var(--text-secondary);
        }

        .hero-section {
            text-align: center;
            padding-block: 40px 20px;
            background: linear-gradient(180deg, rgba(10, 37, 64, 0.8) 0%, rgba(4, 12, 23, 1) 100%);
        }
        .hero-intro {
            max-width: 800px;
            margin: 0 auto 24px;
            color: var(--text-secondary);
        }
        .hero-cta {
            display: block;
            width: 100%;
            max-width: 400px;
            margin: 0 auto 20px;
            padding: 16px;
            background: linear-gradient(to bottom, #00F5FF 0%, #00D1DC 100%);
            color: var(--btn-text);
            text-decoration: none;
            font-weight: 700;
            text-align: center;
            border-radius: var(--radius-lg);
            box-shadow: var(--glow);
            text-transform: uppercase;
        }
        .hero-tags {
            display: flex;
            justify-content: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .hero-tag {
            background: var(--bg-elevated);
            border: 1px solid var(--border-default);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.75rem;
            color: var(--accent);
        }
        .hero-tag { border-radius: 9999px; }

        .banner-link {
            display: block;
            width: 100%;
            margin-bottom: 30px;
        }
        .banner-img {
            width: 100%;
            aspect-ratio: 2 / 1;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-bottom: 40px;
        }
        .category-tile {
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            padding: 16px;
            text-decoration: none;
            color: var(--text-primary);
            border-radius: var(--radius-lg);
            text-align: center;
            transition: transform 0.2s;
        }
        .category-tile:hover { transform: translateY(-5px); border-color: var(--accent); }
        .category-tile i {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 8px;
            display: block;
        }
        .category-label { display: block; font-weight: 600; margin-bottom: 4px; }
        .category-desc { font-size: 0.8rem; color: var(--text-muted); display: block; }

        .game-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-bottom: 40px;
        }
        .game-card {
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            text-decoration: none;
            color: var(--text-primary);
            border: 1px solid var(--border-default);
            transition: box-shadow 0.3s;
        }
        .game-card:hover { box-shadow: var(--shadow-card); border-color: var(--accent); }
        .game-thumb {
            width: 100%;
            aspect-ratio: 1 / 1;
            object-fit: cover;
        }
        .game-info { padding: 12px; text-align: center; }
        .game-info h3 { margin: 0; font-size: 1rem; color: var(--text-primary); }

        .fact-section {
            background: var(--bg-surface);
            padding: 24px;
            border-radius: var(--radius-lg);
            margin-bottom: 40px;
            border: 1px solid var(--border-default);
        }
        .fact-notice {
            font-style: italic;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: block;
        }
        .fact-table {
            width: 100%;
            border-collapse: collapse;
        }
        .fact-row { border-bottom: 1px solid var(--border-default); }
        .fact-cell { padding: 12px 0; vertical-align: top; }
        .fact-label { color: var(--text-muted); width: 40%; font-weight: 500; }
        .fact-value { color: var(--text-primary); width: 60%; }
        .fact-footer-link {
            display: block;
            margin-top: 16px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            text-decoration: none;
        }
        .fact-footer-link:hover { color: var(--accent); }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 12px;
            padding-block: 20px;
            scrollbar-width: none;
        }
        .toc-nav::-webkit-scrollbar { display: none; }
        .toc-link {
            white-space: nowrap;
            background: var(--bg-elevated);
            color: var(--text-secondary);
            text-decoration: none;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            border: 1px solid var(--border-default);
        }
        .toc-link:hover { color: var(--accent); border-color: var(--accent); }

        .promo-grid { display: flex; flex-direction: column; gap: 20px; margin-bottom: 40px; }
        .promo-card {
            background: var(--bg-elevated);
            padding: 24px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
            position: relative;
            overflow: hidden;
        }
        .promo-card h3 { color: var(--accent); margin-bottom: 12px; }
        .promo-card p { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 20px; }
        .promo-btn {
            display: inline-block;
            padding: 10px 20px;
            background: var(--btn-bg);
            color: var(--btn-text);
            text-decoration: none;
            font-weight: 600;
            border-radius: var(--radius-md);
            font-size: 0.9rem;
        }

        .usp-bar {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-bottom: 40px;
        }
        .usp-tile {
            display: flex;
            gap: 16px;
            background: var(--bg-surface);
            padding: 16px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
        }
        .usp-tile i { color: var(--accent); font-size: 1.5rem; margin-top: 4px; }
        .usp-content strong { display: block; color: var(--text-primary); margin-bottom: 4px; }
        .usp-content span { color: var(--text-muted); font-size: 0.9rem; }

        .payment-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-bottom: 40px;
        }
        .pay-card {
            background: var(--bg-surface);
            padding: 16px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
            text-align: center;
        }
        .pay-card i { font-size: 1.8rem; color: var(--accent); margin-bottom: 12px; display: block; }
        .pay-card strong { display: block; color: var(--text-primary); margin-bottom: 8px; }
        .pay-card p { font-size: 0.8rem; color: var(--text-muted); margin: 0; }

        .guide-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 40px;
        }
        .step-item {
            display: flex;
            gap: 16px;
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
        }
        .step-num {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: var(--btn-text);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }
        .step-content h3 { margin: 0 0 8px 0; color: var(--text-primary); font-size: 1.1rem; }
        .step-content h3 a { color: inherit; text-decoration: none; }
        .step-content p { margin: 0; color: var(--text-secondary); font-size: 0.9rem; }

        .app-section {
            background: var(--bg-elevated);
            padding: 32px 20px;
            border-radius: var(--radius-lg);
            text-align: center;
            margin-bottom: 40px;
            border: 2px dashed var(--border-default);
        }
        .app-text { color: var(--text-secondary); margin-bottom: 24px; }
        .app-btn {
            display: inline-block;
            padding: 16px 32px;
            background: var(--btn-bg);
            color: var(--btn-text);
            text-decoration: none;
            font-weight: 700;
            border-radius: var(--radius-lg);
            box-shadow: var(--glow);
        }

        .player-guides {
            display: flex;
            flex-direction: column;
            gap: 24px;
            margin-bottom: 40px;
        }
        .guide-item {
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
        }
        .guide-item h3 { color: var(--text-primary); margin-bottom: 4px; }
        .guide-meta { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 12px; display: block; }
        .guide-item p { margin: 0; color: var(--text-secondary); font-size: 0.95rem; }

        .announcement-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-bottom: 40px;
        }
        .announcement-item {
            background: var(--bg-surface);
            padding: 16px;
            border-radius: var(--radius-lg);
            border-left: 4px solid var(--accent);
            display: flex;
            gap: 16px;
        }
        .announcement-item i { color: var(--accent); font-size: 1.2rem; margin-top: 4px; }
        .announcement-body h3 { font-size: 1.1rem; margin: 0 0 8px 0; color: var(--text-primary); }
        .announcement-body p { margin: 0 0 8px 0; font-size: 0.9rem; color: var(--text-secondary); }
        .announcement-date { font-size: 0.75rem; color: var(--text-muted); }

        .faq-section { margin-bottom: 40px; }
        .faq-item {
            background: var(--bg-surface);
            margin-bottom: 12px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
        }
        .faq-item summary {
            padding: 16px;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-primary);
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary h3 { margin: 0; font-size: 1.05rem; text-align: left; color: inherit; }
        .faq-item p { padding: 0 16px 16px; color: var(--text-secondary); margin: 0; font-size: 0.95rem; }

        .about-section {
            background: var(--bg-surface);
            padding: 32px;
            border-radius: var(--radius-lg);
            margin-bottom: 40px;
            border: 1px solid var(--border-default);
        }
        .about-text { color: var(--text-secondary); margin-bottom: 24px; }
        .team-card {
            background: var(--bg-elevated);
            padding: 20px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-accent);
        }
        .team-card h3 { color: var(--accent); margin-bottom: 12px; }
        .team-card p { margin: 0 0 12px 0; font-size: 0.9rem; color: var(--text-secondary); }
        .team-link { color: var(--accent); text-decoration: none; font-weight: 600; }

        .security-section {
            background: var(--bg-elevated);
            padding: 32px 20px;
            border-radius: var(--radius-lg);
            margin-bottom: 40px;
            text-align: center;
        }
        .security-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-bottom: 24px;
        }
        .security-box {
            background: var(--bg-surface);
            padding: 16px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
        }
        .security-box i { color: var(--accent); font-size: 1.5rem; margin-bottom: 8px; display: block; }
        .security-box strong { display: block; font-size: 0.9rem; color: var(--text-primary); }
        .external-links {
            display: flex;
            justify-content: center;
            gap: 12px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .ext-link {
            color: var(--text-secondary);
            text-decoration: underline;
            font-size: 0.85rem;
        }

        footer {
            background: var(--bg-surface);
            padding: 40px 20px;
            border-top: 1px solid var(--border-default);
            text-align: center;
        }
        .footer-sitemap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 32px;
            text-align: left;
        }
        .footer-link {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.85rem;
            transition: color 0.3s;
        }
        .footer-link:hover { color: var(--accent); }
        .footer-contact { margin-bottom: 24px; font-size: 0.9rem; }
        .footer-contact a { color: var(--accent); text-decoration: none; }
        .footer-legal {
            color: var(--text-muted);
            font-size: 0.75rem;
            line-height: 1.5;
        }

        .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 {
            text-decoration: none;
            color: var(--text-muted);
            display: flex;
            flex-direction: column;
            align-items: center;
            font-size: 0.7rem;
            gap: 4px;
        }
        .nav-item i { font-size: 1.2rem; }
        .nav-item:hover { color: var(--accent); }

        .utility-link {
            display: inline-block;
            margin-top: 10px;
            color: var(--accent);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 600;
        }

        section {
            content-visibility: auto;
            contain-intrinsic-size: 1px 500px;
            margin-bottom: 50px;
        }

        @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(4, 1fr); }
            .navigator { display: none; }
            .hero-cta { max-width: 600px; }
        }
        @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); }
        }