:root {
            --brand-primary: #1A3A5F;
            --brand-primary-hover: #254D7D;
            --brand-secondary: #C0C0C8;
            --brand-secondary-hover: #D1D1D9;
            --brand-accent: #00F5FF;
            --bg-main: #060C16;
            --bg-surface: #0D1626;
            --bg-elevated: #152138;
            --bg-overlay: rgba(6, 12, 22, 0.8);
            --text-primary: #E6EEF5;
            --text-secondary: #B0BCC9;
            --text-muted: #7A8B9F;
            --text-brand-contrast: #060C16;
            --text-link: #00F5FF;
            --text-link-hover: #70F8FF;
            --btn-bg: #00F5FF;
            --btn-text: #060C16;
            --btn-bg-hover: #70F8FF;
            --semantic-success: #00D68F;
            --semantic-error: #FF4D6D;
            --semantic-warning: #FFB800;
            --semantic-info: #4DA3FF;
            --border-default: #1E2D45;
            --border-strong: #2C3E5D;
            --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-elevated: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(0, 245, 255, 0.4);
            --grad-brand: linear-gradient(135deg, #1A3A5F 0%, #00F5FF 100%);
            --grad-hero: radial-gradient(circle at top right, #152138 0%, #060C16 100%);
            --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(--bg-main);
            color: var(--text-primary);
        }
        img, video, iframe { max-width: 100%; height: auto; display: block; }
        a { color: var(--text-link); text-decoration: none; transition: color 0.2s ease; }
        a:hover { color: var(--text-link-hover); }
        
        .btn, .cta {
            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 ease;
            border: none;
            text-align: center;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--grad-btn);
            color: var(--text-brand-contrast);
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:hover {
            background: var(--btn-bg-hover);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: var(--bg-elevated);
            color: var(--text-primary);
            border: 1px solid var(--border-brand);
        }
        .btn-secondary:hover {
            background: var(--border-strong);
        }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            margin-bottom: 24px;
        }
        .header-brand {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .header-brand strong {
            font-size: 16px;
            font-weight: 400;
            color: var(--text-primary);
        }
        .header-actions {
            display: flex;
            gap: 12px;
        }

        main { width: 100%; }
        section {
            margin-bottom: 48px;
            content-visibility: auto;
            contain-intrinsic-size: 1px 500px;
        }

        h1 {
            font-size: clamp(1.6rem, 6.5vw, 2.4rem);
            line-height: 1.2;
            margin: 0 0 20px 0;
            color: var(--text-primary);
            font-weight: 700;
        }
        h2 {
            font-size: clamp(1.3rem, 5.2vw, 1.8rem);
            line-height: 1.25;
            margin-top: 2rem;
            margin-bottom: 24px;
            color: var(--text-primary);
            font-weight: 600;
        }
        h3 {
            font-size: clamp(1.05rem, 4.2vw, 1.25rem);
            line-height: 1.3;
            margin: 0 0 12px 0;
            color: var(--text-primary);
            font-weight: 600;
        }

        .hero-panel {
            background: var(--grad-hero);
            padding: 40px 20px;
            border-radius: var(--radius-lg);
            text-align: center;
            border: 1px solid var(--border-brand);
        }
        .hero-intro {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 30px;
            max-width: 800px;
            margin-inline: auto;
        }
        .hero-cta {
            display: block;
            width: 100%;
            max-width: 400px;
            margin: 0 auto 24px auto;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }
        .hero-tag {
            background: rgba(0, 245, 255, 0.1);
            border: 1px solid var(--border-brand);
            color: var(--brand-accent);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 500;
        }

        .banner-link {
            display: block;
            margin-bottom: 40px;
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .banner-img {
            aspect-ratio: 2 / 1;
            width: 100%;
            object-fit: cover;
        }

        .cat-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-bottom: 40px;
        }
        .cat-tile {
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            text-align: center;
            border: 1px solid var(--border-default);
            transition: all 0.3s ease;
        }
        .cat-tile:hover {
            border-color: var(--brand-accent);
            background: var(--bg-elevated);
        }
        .cat-tile i {
            font-size: 2rem;
            color: var(--brand-accent);
            margin-bottom: 12px;
        }
        .cat-tile strong {
            display: block;
            font-size: 1.1rem;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .cat-tile span {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .game-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .game-card {
            background: var(--bg-surface);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-default);
            transition: transform 0.3s ease;
        }
        .game-card:hover {
            transform: translateY(-5px);
            border-color: var(--brand-accent);
        }
        .game-card img {
            aspect-ratio: 1 / 1;
            width: 100%;
            object-fit: cover;
        }
        .game-info {
            padding: 12px;
            text-align: center;
        }
        .game-info h3 {
            font-size: 1rem;
            margin: 0;
            color: var(--text-primary);
        }

        .fact-table-wrapper {
            background: var(--bg-surface);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-default);
        }
        .fact-notice {
            font-style: italic;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
            display: block;
        }
        .fact-table {
            width: 100%;
            border-collapse: collapse;
        }
        .fact-table tr {
            border-bottom: 1px solid var(--border-default);
        }
        .fact-table td {
            padding: 12px 0;
            color: var(--text-secondary);
        }
        .fact-table td:first-child {
            font-weight: 600;
            color: var(--text-primary);
            width: 40%;
        }
        .fact-footer {
            margin-top: 16px;
            font-size: 0.9rem;
            text-align: center;
        }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 12px;
            padding-bottom: 12px;
            margin-bottom: 32px;
            scrollbar-width: none;
        }
        .toc-nav::-webkit-scrollbar { display: none; }
        .toc-link {
            background: var(--bg-elevated);
            color: var(--text-secondary);
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            font-size: 0.9rem;
            border: 1px solid var(--border-default);
        }
        .toc-link:hover {
            color: var(--brand-accent);
            border-color: var(--brand-accent);
        }

        .promo-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .promo-card {
            background: var(--bg-surface);
            padding: 24px;
            border-radius: var(--radius-md);
            border-left: 4px solid var(--brand-accent);
            border-right: 1px solid var(--border-default);
            border-top: 1px solid var(--border-default);
            border-bottom: 1px solid var(--border-default);
        }
        .promo-card h3 { margin-bottom: 12px; }
        .promo-card p { color: var(--text-secondary); margin-bottom: 20px; }

        .usp-grid {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .usp-tile {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }
        .usp-tile i {
            font-size: 1.5rem;
            color: var(--brand-accent);
        }
        .usp-content strong {
            display: block;
            font-size: 1.1rem;
            margin-bottom: 4px;
        }
        .usp-content p {
            margin: 0;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }

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

        .step-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .step-num {
            background: var(--brand-accent);
            color: var(--text-brand-contrast);
            min-width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            flex-shrink: 0;
        }
        .step-content h3 { margin: 0 0 8px 0; }
        .step-content h3 a { color: inherit; }

        .download-box {
            background: var(--bg-surface);
            padding: 32px;
            border-radius: var(--radius-lg);
            text-align: center;
            border: 1px solid var(--border-brand);
        }

        .guide-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .guide-item {
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }
        .guide-meta {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 12px;
            display: block;
        }

        .announcement-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .announcement-card {
            display: flex;
            gap: 16px;
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }
        .announcement-card i {
            font-size: 1.2rem;
            color: var(--brand-accent);
        }
        .announcement-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .announcement-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: block;
            margin-top: 8px;
        }

        .faq-container {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        details {
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
        }
        summary {
            padding: 16px;
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            font-weight: 600;
        }
        summary::-webkit-details-marker { display: none; }
        summary h3 { margin: 0; font-size: 1.1rem; }
        .faq-answer {
            padding: 0 16px 16px 16px;
            color: var(--text-secondary);
            border-top: 1px solid var(--border-default);
            padding-top: 16px;
        }

        .about-box {
            background: var(--bg-surface);
            padding: 32px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
        }
        .team-card {
            margin-top: 24px;
            padding: 20px;
            background: var(--bg-elevated);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-brand);
        }

        .security-box {
            background: var(--bg-surface);
            padding: 32px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
        }
        .rg-links {
            display: flex;
            gap: 16px;
            margin: 20px 0;
        }

        footer {
            margin-top: 60px;
            padding: 40px 0;
            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-contact {
            margin-bottom: 24px;
            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-brand);
            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 {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            color: var(--text-secondary);
            font-size: 0.75rem;
        }
        .nav-item i { font-size: 1.2rem; }
        .nav-item:hover { color: var(--brand-accent); }

        .util-link {
            text-align: center;
            display: block;
            margin: 20px 0;
            font-weight: 500;
        }

        @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); }
            .footer-sitemap { grid-template-columns: repeat(5, 1fr); }
            .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(4, 1fr); }
        }