:root {
            --brand-primary: #0B2447;
            --brand-primary-hover: #153A7A;
            --brand-secondary: #C0C0C0;
            --brand-accent: #00F5FF;
            --bg-main: #050C1A;
            --bg-surface: #0D182C;
            --bg-elevated: #162541;
            --text-primary: #E6F1FF;
            --text-secondary: #B0C4DE;
            --text-muted: #708090;
            --btn-bg: #00F5FF;
            --btn-text: #050C1A;
            --border-default: #1E3A5F;
            --border-brand: rgba(0, 245, 255, 0.4);
            --radius-md: 12px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
            --glass-bg: rgba(13, 24, 44, 0.7);
        }

        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);
        }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            max-width: 1200px;
            margin: 0 auto;
        }

        .header-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
            color: var(--text-primary);
        }

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

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

        .btn-nav {
            text-decoration: none;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.875rem;
            transition: 0.3s;
        }

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

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

        main {
            max-width: 1200px;
            margin: 0 auto;
        }

        .hero-section {
            padding: 40px 0;
            text-align: center;
        }

        .hero-title {
            font-size: clamp(1.6rem, 6.5vw, 2.4rem);
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--text-primary);
        }

        .hero-text {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 800px;
            margin: 0 auto 30px;
        }

        .hero-cta {
            display: block;
            width: 100%;
            background: linear-gradient(180deg, #00F5FF 0%, #00D1DC 100%);
            color: var(--btn-text);
            text-decoration: none;
            padding: 18px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.25rem;
            box-shadow: 0 0 15px rgba(0, 245, 255, 0.6);
            transition: 0.3s;
        }

        .hero-tags {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: 25px;
            flex-wrap: wrap;
        }

        .hero-tag {
            background: var(--bg-elevated);
            border: 1px solid var(--border-brand);
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 0.8rem;
            color: var(--brand-accent);
        }

        .banner-link {
            display: block;
            margin: 20px 0;
        }

        .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: 15px;
            margin: 30px 0;
        }

        .category-tile {
            background: var(--bg-surface);
            border: 1px solid var(--border-default);
            padding: 20px;
            border-radius: var(--radius-md);
            text-decoration: none;
            color: var(--text-primary);
            text-align: center;
            transition: 0.3s;
            backdrop-filter: blur(10px);
        }

        .category-tile:hover {
            border-color: var(--brand-accent);
            transform: translateY(-5px);
        }

        .category-icon {
            font-size: 2rem;
            margin-bottom: 10px;
            color: var(--brand-accent);
        }

        .category-label {
            display: block;
            font-size: 1.1rem;
            margin-bottom: 5px;
        }

        .category-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .game-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin-bottom: 40px;
        }

        .game-card {
            background: var(--bg-surface);
            border-radius: var(--radius-md);
            text-decoration: none;
            color: var(--text-primary);
            overflow: hidden;
            border: 1px solid var(--border-default);
            transition: 0.3s;
        }

        .game-card:hover {
            border-color: var(--brand-accent);
        }

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

        .game-info {
            padding: 12px;
            text-align: center;
        }

        .game-title {
            font-size: 1rem;
            margin: 0;
            font-weight: 500;
        }

        .facts-section {
            background: var(--bg-surface);
            padding: 30px 20px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-default);
            margin: 40px 0;
        }

        .facts-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }

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

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

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

        .freshness-notice {
            font-style: italic;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        .terms-link {
            display: block;
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
            text-decoration: none;
            margin-top: 15px;
        }

        .toc-nav {
            display: flex;
            overflow-x: auto;
            gap: 10px;
            padding: 15px 0;
            margin-bottom: 30px;
            scrollbar-width: none;
        }

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

        .toc-link {
            background: var(--bg-elevated);
            color: var(--text-primary);
            text-decoration: none;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            white-space: nowrap;
            font-size: 0.9rem;
            border: 1px solid var(--border-default);
        }

        .promo-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 40px;
        }

        .promo-card {
            background: var(--bg-elevated);
            padding: 25px;
            border-radius: var(--radius-lg);
            border-left: 4px solid var(--brand-accent);
        }

        .promo-title {
            margin-top: 0;
            color: var(--brand-accent);
        }

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

        .promo-btn {
            display: inline-block;
            background: var(--btn-bg);
            color: var(--btn-text);
            text-decoration: none;
            padding: 10px 20px;
            border-radius: var(--radius-md);
            font-weight: 600;
        }

        .usp-bar {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            margin: 40px 0;
        }

        .usp-tile {
            display: flex;
            gap: 15px;
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            align-items: flex-start;
        }

        .usp-icon {
            font-size: 1.5rem;
            color: var(--brand-accent);
        }

        .usp-content strong {
            display: block;
            margin-bottom: 5px;
        }

        .payment-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin-bottom: 40px;
        }

        .payment-card {
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            text-align: center;
            border: 1px solid var(--border-default);
        }

        .payment-icon {
            font-size: 2rem;
            margin-bottom: 10px;
            color: var(--brand-accent);
        }

        .payment-name {
            display: block;
            font-weight: 600;
            margin-bottom: 10px;
        }

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

        .guide-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 40px;
        }

        .step-card {
            display: flex;
            gap: 20px;
            background: var(--bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
        }

        .step-num {
            background: var(--brand-accent);
            color: var(--btn-text);
            width: 35px;
            height: 35px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            flex-shrink: 0;
        }

        .step-content h3 { margin: 0 0 10px 0; }
        .step-link { color: inherit; text-decoration: none; }

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

        .download-btn {
            display: block;
            background: var(--btn-bg);
            color: var(--btn-text);
            text-decoration: none;
            padding: 15px;
            border-radius: var(--radius-md);
            font-weight: 700;
            margin: 20px 0;
        }

        .player-guides {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 40px;
        }

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

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

        .announcement-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-bottom: 40px;
        }

        .announcement-item {
            display: flex;
            gap: 15px;
            background: var(--bg-surface);
            padding: 15px;
            border-radius: var(--radius-md);
            border-left: 3px solid var(--brand-accent);
        }

        .announcement-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: block;
            margin-top: 10px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 40px;
        }

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

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

        .faq-summary h3 {
            font-size: 1.1rem;
            margin: 0;
            color: var(--text-primary);
        }

        .faq-answer {
            padding: 0 15px 15px;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

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

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

        .security-section {
            padding: 30px 20px;
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            margin-bottom: 40px;
        }

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

        .external-links a {
            color: var(--brand-accent);
            text-decoration: none;
            font-size: 0.9rem;
            border: 1px solid var(--brand-accent);
            padding: 5px 10px;
            border-radius: 4px;
        }

        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: 10px;
            margin-bottom: 30px;
            text-align: left;
        }

        .footer-sitemap a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.85rem;
        }

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

        .contact-line a { color: var(--brand-accent); text-decoration: none; }

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

        .navigator {
            position: fixed;
            inset-inline: 0;
            bottom: 0;
            background: var(--bg-surface);
            backdrop-filter: blur(15px);
            border-top: 1px solid var(--border-brand);
            display: flex;
            justify-content: space-around;
            padding: 10px 0 calc(10px + env(safe-area-inset-bottom, 0px));
            z-index: 1000;
        }

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

        .nav-item i { font-size: 1.2rem; }

        section {
            content-visibility: auto;
            contain-intrinsic-size: 1px 500px;
            margin-bottom: 60px;
        }

        .util-more-link {
            display: block;
            text-align: center;
            margin-top: 20px;
            color: var(--brand-accent);
            text-decoration: none;
            font-weight: 500;
        }

        @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(4, 1fr); }
            .payment-grid { grid-template-columns: repeat(4, 1fr); }
            .usp-bar { grid-template-columns: repeat(2, 1fr); }
            .navigator { position: static; display: none; }
            .footer-sitemap { grid-template-columns: repeat(5, 1fr); }
        }

        @media (min-width: 1200px) {
            body { padding-inline: 32px; max-width: 1200px; margin-inline: auto; }
            .category-grid { grid-template-columns: repeat(4, 1fr); }
        }