:root {
            --color-primary: #007BFF;
            --color-primary-hover: #3395FF;
            --color-secondary: #C0C0C0;
            --color-secondary-hover: #E0E0E0;
            --color-accent: #00F2FF;
            --bg-main: #050B1A;
            --bg-surface: #0D162C;
            --bg-elevated: #16223E;
            --bg-overlay: rgba(5, 11, 26, 0.75);
            --text-primary: #E6F0FF;
            --text-secondary: #B0C4DE;
            --text-muted: #7A8CA8;
            --text-brand-contrast: #050B1A;
            --text-link: #00F2FF;
            --text-link-hover: #FFFFFF;
            --btn-bg: #007BFF;
            --btn-text: #FFFFFF;
            --btn-hover-bg: #00F2FF;
            --btn-hover-text: #050B1A;
            --semantic-success: #00C896;
            --semantic-error: #FF4D4D;
            --semantic-warning: #FFB800;
            --semantic-info: #00BFFF;
            --border-default: #1C2B4D;
            --border-strong: #2D4275;
            --border-brand: #00F2FF;
            --radius-sm: 4px;
            --radius-md: 12px;
            --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, 123, 255, 0.15);
            --shadow-glow: 0 0 15px rgba(0, 242, 255, 0.5);
            --grad-brand: linear-gradient(135deg, #007BFF 0%, #00F2FF 100%);
            --grad-hero: radial-gradient(circle at top right, #16223E 0%, #050B1A 100%);
            --grad-btn: linear-gradient(180deg, #008CFF 0%, #007BFF 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;
            color: var(--text-primary);
            background-color: var(--bg-main);
            padding-inline: 14px;
            padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px));
            overflow-x: hidden;
        }

        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--text-link); text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: var(--text-link-hover); }

        .btn-base {
            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;
        }

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

        .btn-primary:hover {
            background: var(--btn-hover-bg);
            color: var(--btn-hover-text);
            transform: translateY(-2px);
        }

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

        .btn-outline:hover {
            background: rgba(0, 242, 255, 0.1);
            color: #fff;
        }

        header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-block: 12px;
            background: var(--bg-surface);
            border-bottom: 1px solid var(--border-default);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-brand {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .header-brand strong {
            font-size: 16px;
            font-weight: 400;
        }

        .header-actions {
            display: flex;
            gap: 10px;
        }

        main {
            width: 100%;
        }

        .hero-section {
            padding-block: 40px 20px;
            text-align: center;
            background: var(--grad-hero);
        }

        h1 {
            font-size: clamp(1.6rem, 6.5vw, 2.4rem);
            line-height: 1.2;
            margin-bottom: 1rem;
            color: #fff;
        }

        .hero-intro {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 800px;
            margin: 0 auto 24px;
            padding-inline: 1rem;
        }

        .hero-cta {
            display: block;
            width: 100%;
            max-width: 400px;
            margin: 0 auto 24px;
        }

        .hero-pills {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            padding-inline: 1rem;
        }

        .pill-tag {
            background: rgba(0, 123, 255, 0.15);
            border: 1px solid var(--border-strong);
            color: var(--text-primary);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
        }

        .banner-wrapper {
            width: 100%;
            margin-bottom: 30px;
        }

        .banner-wrapper img {
            aspect-ratio: 2 / 1;
            object-fit: cover;
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-bottom: 40px;
        }

        .cat-tile {
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            padding: 16px;
            border-radius: var(--radius-md);
            text-align: center;
            transition: all 0.3s ease;
        }

        .cat-tile:hover {
            border-color: var(--border-brand);
            background: var(--bg-elevated);
            transform: translateY(-4px);
        }

        .cat-tile i {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 10px;
        }

        .cat-tile strong {
            display: block;
            font-size: 1.1rem;
            margin-bottom: 6px;
            color: #fff;
        }

        .cat-tile span {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .game-section {
            margin-bottom: 40px;
        }

        h2 {
            font-size: clamp(1.3rem, 5.2vw, 1.8rem);
            line-height: 1.25;
            margin-top: 2rem;
            margin-bottom: 1.5rem;
            color: #fff;
            border-left: 4px solid var(--color-accent);
            padding-left: 12px;
        }

        .game-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .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: scale(1.03);
            border-color: var(--color-accent);
        }

        .game-card img {
            aspect-ratio: 1 / 1;
            object-fit: cover;
            width: 100%;
        }

        .game-card h3 {
            font-size: 1rem;
            padding: 12px;
            margin: 0;
            text-align: center;
            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);
        }

        .freshness-notice {
            font-style: italic;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
            display: block;
        }

        .fact-table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 16px;
        }

        .fact-table td {
            padding: 12px;
            border-bottom: 1px solid var(--border-default);
        }

        .fact-table td:first-child {
            font-weight: 600;
            color: var(--text-secondary);
            width: 40%;
        }

        .fact-footer {
            font-size: 0.85rem;
            text-align: center;
        }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 10px;
            padding-block: 15px;
            margin-bottom: 30px;
            scrollbar-width: none;
        }

        .toc-nav::-webkit-scrollbar { display: none; }

        .toc-link {
            background: var(--bg-elevated);
            color: var(--text-primary);
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            font-size: 0.9rem;
            border: 1px solid var(--border-default);
        }

        .promo-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-strong);
            padding: 24px;
            border-radius: var(--radius-lg);
            margin-bottom: 20px;
            position: relative;
            overflow: hidden;
        }

        .promo-card h3 {
            margin-top: 0;
            color: var(--color-accent);
        }

        .usp-bar {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
            margin-bottom: 40px;
        }

        .usp-tile {
            display: flex;
            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(--color-accent);
        }

        .usp-tile strong {
            display: block;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 4px;
        }

        .payment-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }

        .payment-card {
            background: var(--bg-surface);
            padding: 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
            text-align: center;
        }

        .payment-card i {
            font-size: 1.8rem;
            color: var(--text-primary);
            margin-bottom: 8px;
            display: block;
        }

        .payment-card strong {
            display: block;
            margin-bottom: 8px;
            color: #fff;
        }

        .payment-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin: 0;
        }

        .step-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .step-item {
            display: flex;
            gap: 16px;
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            align-items: flex-start;
        }

        .step-badge {
            background: var(--grad-brand);
            color: var(--text-brand-contrast);
            width: 32px;
            height: 32px;
            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;
        }

        .app-section {
            background: var(--bg-elevated);
            padding: 30px 20px;
            border-radius: var(--radius-lg);
            text-align: center;
            margin-bottom: 40px;
        }

        .guide-item {
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            border: 1px solid var(--border-default);
        }

        .guide-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
            display: block;
        }

        .announcement-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 15px;
        }

        .announcement-item {
            background: var(--bg-surface);
            padding: 16px;
            border-radius: var(--radius-md);
            border-left: 4px solid var(--color-primary);
        }

        .announcement-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
        }

        .announcement-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 8px;
            display: block;
        }

        .faq-section {
            margin-bottom: 40px;
        }

        details {
            background: var(--bg-surface);
            margin-bottom: 10px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-default);
        }

        summary {
            padding: 16px;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        summary::-webkit-details-marker { display: none; }

        summary h3 {
            margin: 0;
            font-size: 1.05rem;
            color: var(--text-primary);
        }

        .faq-answer {
            padding: 0 16px 16px;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

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

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

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

        .sec-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin: 20px 0;
        }

        footer {
            background: var(--bg-surface);
            padding: 40px 20px 100px;
            border-top: 1px solid var(--border-default);
            text-align: center;
        }

        .footer-sitemap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
            max-width: 800px;
            margin: 0 auto 30px;
            text-align: left;
        }

        .footer-contact {
            margin-bottom: 20px;
            color: var(--text-secondary);
        }

        .footer-legal {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .navigator {
            position: fixed;
            inset-inline: 0;
            bottom: 0;
            background: var(--bg-surface);
            border-top: 1px solid var(--border-default);
            display: flex;
            justify-content: space-around;
            padding: 10px 0 calc(10px + env(safe-area-inset-bottom));
            z-index: 1000;
        }

        .nav-item {
            text-align: center;
            flex: 1;
            color: var(--text-muted);
            font-size: 0.75rem;
        }

        .nav-item i {
            display: block;
            font-size: 1.2rem;
            margin-bottom: 4px;
        }

        .nav-item:hover { color: var(--color-accent); }

        .utility-link {
            display: block;
            text-align: center;
            margin-top: 15px;
            font-weight: 600;
            color: var(--color-accent);
        }

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

        @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); }
            .usp-bar { grid-template-columns: repeat(2, 1fr); }
            .payment-grid { grid-template-columns: repeat(4, 1fr); }
            .step-list { grid-template-columns: repeat(2, 1fr); }
            .navigator { display: none; }
            footer { padding-bottom: 40px; }
        }

        @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); }
            .usp-bar { grid-template-columns: repeat(4, 1fr); }
            .payment-grid { grid-template-columns: repeat(5, 1fr); }
            .step-list { grid-template-columns: repeat(4, 1fr); }
        }