:root {
            --color-primary: #0A192F;
            --color-primary-hover: #112240;
            --color-secondary: #C0C0C0;
            --color-secondary-hover: #E0E0E0;
            --color-accent: #00F2FF;
            --color-bg-main: #050B18;
            --color-bg-surface: #0D1626;
            --color-bg-elevated: #162238;
            --color-text-primary: #E6F1FF;
            --color-text-secondary: #B0B8C1;
            --color-text-muted: #7D8B99;
            --color-btn-bg: #00F2FF;
            --color-btn-text: #050B18;
            --color-btn-hover-bg: #70F9FF;
            --color-border-default: #1E2D45;
            --color-border-brand: rgba(0, 242, 255, 0.4);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-pill: 9999px;
            --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
            --font-headings: 'Be Vietnam Pro', sans-serif;
            --font-body: 'Manrope', sans-serif;
        }

        html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
        body {
            margin: 0;
            font-family: var(--font-body);
            background-color: var(--color-bg-main);
            color: var(--color-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;
        }

        img { max-width: 100%; height: auto; display: block; font-style: italic; }
        a { color: var(--color-accent); text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: var(--color-btn-hover-bg); }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-block: 1rem;
            border-bottom: 1px solid var(--color-border-default);
        }

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

        .header-logo-link strong {
            font-size: 16px;
            font-weight: normal;
            color: var(--color-text-primary);
        }

        .header-actions {
            display: flex;
            gap: 12px;
        }

        .btn-nav {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.875rem;
        }

        .btn-login {
            background: transparent;
            color: var(--color-text-primary);
            border: 1px solid var(--color-border-default);
        }

        .btn-register {
            background: var(--color-btn-bg);
            color: var(--color-btn-text);
        }

        main {
            width: 100%;
        }

        .hero-section {
            padding-block: 2rem 0;
            text-align: center;
        }

        h1 {
            font-family: var(--font-headings);
            font-size: clamp(1.6rem, 6.5vw, 2.4rem);
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--color-text-primary);
        }

        .hero-intro {
            max-width: 700px;
            margin: 0 auto 2rem;
            color: var(--color-text-secondary);
        }

        .btn-hero-cta {
            display: block;
            width: 100%;
            min-height: 48px;
            background: linear-gradient(180deg, #00F2FF 0%, #00C8D4 100%);
            color: var(--color-btn-text);
            text-align: center;
            line-height: 48px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.125rem;
            box-shadow: 0 0 15px rgba(0, 242, 255, 0.5);
            margin-bottom: 1.5rem;
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px;
            margin-bottom: 2rem;
        }

        .hero-tag-pill {
            background: var(--color-bg-surface);
            border: 1px solid var(--color-border-brand);
            color: var(--color-text-secondary);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.75rem;
        }

        .banner-link {
            display: block;
            width: 100%;
            aspect-ratio: 2 / 1;
            overflow: hidden;
            border-radius: var(--radius-md);
        }

        .cat-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-block: 2rem 0;
        }

        .cat-tile {
            background: var(--color-bg-surface);
            backdrop-filter: blur(10px);
            border: 1px solid var(--color-border-default);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }

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

        .cat-tile strong {
            display: block;
            font-size: 1rem;
            color: var(--color-text-primary);
        }

        .cat-tile span {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }

        h2 {
            font-family: var(--font-headings);
            font-size: clamp(1.3rem, 5.2vw, 1.8rem);
            line-height: 1.25;
            margin-top: 2rem;
            margin-bottom: 1.5rem;
            text-align: center;
            color: var(--color-text-primary);
        }

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

        .game-card {
            background: var(--color-bg-surface);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border-default);
            text-decoration: none;
            transition: transform 0.2s ease;
        }

        .game-card:hover { transform: translateY(-4px); }

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

        .game-card h3 {
            padding: 10px;
            margin: 0;
            font-size: 0.9rem;
            text-align: center;
            color: var(--color-text-primary);
        }

        .fact-table-wrapper {
            background: var(--color-bg-surface);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            border: 1px solid var(--color-border-brand);
            margin-block: 1rem;
        }

        .freshness-notice {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            font-style: italic;
            margin-bottom: 1rem;
            text-align: center;
            display: block;
        }

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

        .fact-row td {
            padding: 12px;
            border-bottom: 1px solid var(--color-border-default);
            font-size: 0.9rem;
        }

        .fact-label {
            color: var(--color-text-secondary);
            width: 40%;
        }

        .fact-value {
            color: var(--color-text-primary);
            font-weight: 500;
        }

        .terms-hint {
            display: block;
            text-align: center;
            font-size: 0.8rem;
            margin-top: 1rem;
            color: var(--color-text-muted);
        }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 10px;
            padding-block: 1rem;
            scrollbar-width: none;
        }

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

        .toc-link {
            background: var(--color-bg-elevated);
            color: var(--color-text-primary);
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            font-size: 0.85rem;
            border: 1px solid var(--color-border-default);
        }

        .promo-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .promo-card {
            background: var(--color-bg-surface);
            padding: 1.5rem;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-default);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .promo-card p {
            margin: 0;
            color: var(--color-text-secondary);
            font-size: 0.95rem;
        }

        .btn-promo {
            align-self: flex-start;
            padding: 10px 20px;
            background: var(--color-btn-bg);
            color: var(--color-btn-text);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
        }

        .usp-bar {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-block: 2rem 0;
        }

        .usp-tile {
            display: flex;
            gap: 15px;
            background: var(--color-bg-surface);
            padding: 1.2rem;
            border-radius: var(--radius-md);
            align-items: flex-start;
        }

        .usp-tile i {
            font-size: 1.5rem;
            color: var(--color-accent);
            padding-top: 4px;
        }

        .usp-content strong {
            display: block;
            font-size: 1rem;
            color: var(--color-text-primary);
            margin-bottom: 4px;
        }

        .usp-content p {
            margin: 0;
            font-size: 0.85rem;
            color: var(--color-text-secondary);
        }

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

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

        .pay-card i {
            font-size: 1.8rem;
            color: var(--color-accent);
            margin-bottom: 8px;
        }

        .pay-card strong {
            display: block;
            font-size: 0.9rem;
            margin-bottom: 6px;
        }

        .pay-card p {
            margin: 0;
            font-size: 0.75rem;
            color: var(--color-text-muted);
        }

        .guide-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .step-item {
            display: flex;
            gap: 15px;
            align-items: flex-start;
        }

        .step-num {
            background: var(--color-accent);
            color: var(--color-btn-text);
            width: 32px;
            height: 32px;
            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;
            font-size: 1.1rem;
        }

        .step-content a {
            color: inherit;
        }

        .step-content p {
            margin: 0;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
        }

        .download-box {
            background: var(--color-bg-surface);
            padding: 2rem;
            border-radius: var(--radius-lg);
            text-align: center;
            border: 1px solid var(--color-border-brand);
        }

        .btn-download {
            display: inline-block;
            padding: 14px 32px;
            background: var(--color-btn-bg);
            color: var(--color-btn-text);
            border-radius: var(--radius-pill);
            font-weight: 700;
            margin-block: 1.5rem;
        }

        .player-guides {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .guide-item {
            background: var(--color-bg-surface);
            padding: 1.5rem;
            border-radius: var(--radius-md);
        }

        .guide-item h3 {
            margin: 0 0 5px 0;
            color: var(--color-text-primary);
        }

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

        .announcement-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .ann-item {
            display: flex;
            gap: 12px;
            background: var(--color-bg-surface);
            padding: 1rem;
            border-radius: var(--radius-md);
            align-items: center;
        }

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

        .ann-content {
            flex-grow: 1;
        }

        .ann-title {
            font-weight: 600;
            font-size: 0.95rem;
            display: block;
        }

        .ann-text {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            margin: 4px 0;
        }

        .ann-date {
            font-size: 0.75rem;
            color: var(--color-text-muted);
        }

        .faq-container {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item details {
            background: var(--color-bg-surface);
            border: 1px solid var(--color-border-default);
            border-radius: var(--radius-md);
        }

        .faq-item summary {
            padding: 15px;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-item summary h3 {
            margin: 0;
            font-size: 1rem;
            color: var(--color-text-primary);
        }

        .faq-answer {
            padding: 0 15px 15px;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
        }

        .about-text {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            color: var(--color-text-secondary);
        }

        .team-card {
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border-default);
            padding: 1.5rem;
            border-radius: var(--radius-lg);
            margin-top: 2rem;
            text-align: center;
        }

        .security-section {
            background: var(--color-bg-surface);
            padding: 2rem;
            border-radius: var(--radius-lg);
            text-align: center;
            border: 1px solid var(--color-border-default);
        }

        .safe-links {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-block: 1.5rem;
            flex-wrap: wrap;
        }

        footer {
            margin-top: 3rem;
            padding-block: 2rem;
            border-top: 1px solid var(--color-border-default);
            text-align: center;
        }

        .footer-sitemap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
            margin-bottom: 2rem;
        }

        .footer-sitemap a {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
        }

        .footer-contact {
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
        }

        .footer-legal {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            line-height: 1.4;
        }

        .navigator {
            position: fixed;
            inset-inline: 0;
            bottom: 0;
            height: 72px;
            background: var(--color-bg-surface);
            backdrop-filter: blur(10px);
            border-top: 1px solid var(--color-border-default);
            display: flex;
            justify-content: space-around;
            align-items: center;
            padding-bottom: env(safe-area-inset-bottom);
            z-index: 1000;
        }

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

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

        .utility-link {
            display: inline-block;
            margin-top: 10px;
            font-size: 0.85rem;
            font-weight: 600;
        }

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

        @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(2, 1fr); }
            .payment-grid { grid-template-columns: repeat(4, 1fr); }
            .navigator { position: static; height: auto; padding: 2rem 0; border-top: none; }
            .nav-item { flex-direction: row; gap: 8px; padding: 10px 20px; }
        }

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