:root {
            --brand-primary: #007BFF;
            --brand-primary-hover: #3395FF;
            --brand-secondary: #C0C0C0;
            --brand-secondary-hover: #E0E0E0;
            --brand-accent: #00F5FF;
            --bg-main: #050A18;
            --bg-surface: #0D1428;
            --bg-elevated: #16203D;
            --bg-overlay: rgba(5, 10, 24, 0.75);
            --text-primary: #E6EEFF;
            --text-secondary: #B0BADC;
            --text-muted: #7D8BAE;
            --text-brand-contrast: #050A18;
            --text-link: #00F5FF;
            --text-link-hover: #33D1FF;
            --btn-bg: #007BFF;
            --btn-text: #FFFFFF;
            --btn-bg-hover: #00F5FF;
            --btn-text-hover: #050A18;
            --semantic-success: #00E676;
            --semantic-error: #FF5252;
            --semantic-warning: #FFD740;
            --semantic-info: #40C4FF;
            --border-default: #1C2B4D;
            --border-strong: #2A3E6B;
            --border-brand: #00F5FF;
            --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, 0, 0, 0.5);
            --shadow-glow: 0 0 15px rgba(0, 245, 255, 0.4);
            --grad-brand: linear-gradient(135deg, #007BFF 0%, #00F5FF 100%);
            --grad-hero: radial-gradient(circle at top right, #16203D 0%, #050A18 100%);
            --grad-btn: linear-gradient(to bottom, #008CFF, #007BFF);
        }

        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);
            background-image: var(--grad-hero);
            background-attachment: fixed;
        }
        img, video, iframe { 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, .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;
        }
        .cta-primary {
            background: var(--grad-btn);
            color: var(--btn-text);
            width: 100%;
            font-size: 1.1rem;
            box-shadow: var(--shadow-glow);
        }
        .cta-primary:hover {
            background: var(--btn-bg-hover);
            color: var(--btn-text-hover);
            transform: translateY(-2px);
        }
        .cta-secondary {
            background: var(--bg-elevated);
            color: var(--text-primary);
            border: 1px solid var(--border-brand);
        }
        .cta-secondary:hover {
            background: var(--border-brand);
            color: var(--text-brand-contrast);
        }
        h1 { font-family: 'Be Vietnam Pro', sans-serif; font-size: clamp(1.6rem, 6.5vw, 2.4rem); line-height: 1.2; font-weight: 800; margin: 0 0 1.5rem 0; color: var(--text-primary); }
        h2 { font-family: 'Be Vietnam Pro', sans-serif; font-size: clamp(1.3rem, 5.2vw, 1.8rem); line-height: 1.25; margin-top: 2.5rem; margin-bottom: 1.25rem; font-weight: 700; color: var(--text-primary); }
        h3 { font-family: 'Be Vietnam Pro', sans-serif; font-size: clamp(1.05rem, 4.2vw, 1.25rem); line-height: 1.3; font-weight: 600; color: var(--text-secondary); margin: 0 0 0.75rem 0; }
        
        header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0;
            margin-bottom: 2rem;
        }
        .header-logo-link { display: flex; align-items: center; gap: 8px; }
        .header-logo-link strong { font-size: 16px; font-weight: 400; color: var(--text-primary); }
        .header-auth { display: flex; gap: 10px; }
        .header-auth a { font-size: 0.9rem; padding: 8px 16px; border-radius: var(--radius-pill); font-weight: 500; }
        .header-auth .login-link { color: var(--text-primary); border: 1px solid var(--border-default); }
        .header-auth .reg-link { background: var(--brand-primary); color: #fff; }

        .hero-section { text-align: center; max-width: 800px; margin: 0 auto 3rem auto; }
        .hero-intro { margin-bottom: 2rem; color: var(--text-secondary); font-size: 1.1rem; }
        .hero-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 1.5rem; }
        .hero-tag { background: var(--bg-surface); border: 1px solid var(--border-strong); color: var(--text-muted); padding: 4px 12px; border-radius: var(--radius-pill); font-size: 0.8rem; }

        .banner-link { display: block; width: 100%; aspect-ratio: 2 / 1; overflow: hidden; border-radius: var(--radius-lg); margin-bottom: 3rem; }
        .banner-link img { width: 100%; height: 100%; object-fit: cover; }

        .category-hub { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 3rem; }
        .cat-tile { 
            background: var(--bg-surface); 
            border: 1px solid var(--border-default); 
            padding: 20px; 
            border-radius: var(--radius-md); 
            text-align: center; 
            text-decoration: none; 
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }
        .cat-tile:hover { border-color: var(--brand-accent); background: var(--bg-elevated); transform: translateY(-5px); }
        .cat-tile i { font-size: 2rem; color: var(--brand-accent); margin-bottom: 12px; }
        .cat-tile strong { display: block; color: var(--text-primary); font-size: 1.1rem; margin-bottom: 8px; }
        .cat-tile span { font-size: 0.85rem; color: var(--text-muted); display: block; line-height: 1.4; }

        .game-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; margin-bottom: 3rem; }
        .game-card { 
            background: var(--bg-surface); 
            border-radius: var(--radius-md); 
            border: 1px solid var(--border-default); 
            text-decoration: none; 
            overflow: hidden;
            transition: transform 0.3s ease;
        }
        .game-card:hover { transform: scale(1.03); border-color: var(--brand-accent); }
        .game-card img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
        .game-card h3 { padding: 12px; text-align: center; font-size: 1rem; margin: 0; color: var(--text-primary); }

        .facts-container { background: var(--bg-surface); border-radius: var(--radius-lg); padding: 24px; border: 1px solid var(--border-strong); margin-bottom: 3rem; }
        .facts-notice { font-style: italic; color: var(--text-muted); font-size: 0.85rem; margin-bottom: 1.5rem; display: block; }
        .facts-table { width: 100%; border-collapse: collapse; }
        .facts-table tr { border-bottom: 1px solid var(--border-default); }
        .facts-table td { padding: 12px 8px; font-size: 0.95rem; }
        .facts-label { color: var(--text-muted); width: 40%; }
        .facts-value { color: var(--text-primary); font-weight: 500; }
        .facts-footer-link { display: block; text-align: center; margin-top: 1.5rem; font-size: 0.85rem; color: var(--text-muted); }

        .toc-nav { 
            display: flex; 
            overflow-x: auto; 
            gap: 10px; 
            padding: 10px 0; 
            margin-bottom: 3rem; 
            scrollbar-width: none; 
            -ms-overflow-style: none;
            border-bottom: 1px solid var(--border-default);
        }
        .toc-nav::-webkit-scrollbar { display: none; }
        .toc-link { 
            white-space: nowrap; 
            background: var(--bg-elevated); 
            padding: 8px 16px; 
            border-radius: var(--radius-pill); 
            font-size: 0.85rem; 
            border: 1px solid var(--border-default); 
            color: var(--text-secondary);
        }
        .toc-link:hover { background: var(--border-brand); color: var(--text-brand-contrast); }

        .promo-grid { display: grid; grid-template-columns: 1fr; gap: 20px; margin-bottom: 3rem; }
        .promo-card { 
            background: var(--bg-surface); 
            border: 1px solid var(--border-strong); 
            padding: 24px; 
            border-radius: var(--radius-lg); 
            position: relative;
            overflow: hidden;
        }
        .promo-card::before { content: ""; position: absolute; top: 0; right: 0; width: 4px; height: 100%; background: var(--brand-accent); }
        .promo-card h3 { font-size: 1.4rem; margin-bottom: 1rem; color: var(--text-primary); }
        .promo-card p { color: var(--text-secondary); margin-bottom: 1.5rem; font-size: 0.95rem; }

        .usp-bar { display: grid; grid-template-columns: 1fr; gap: 15px; margin-bottom: 3rem; }
        .usp-tile { 
            background: var(--bg-elevated); 
            padding: 20px; 
            border-radius: var(--radius-md); 
            display: flex; 
            gap: 15px; 
            align-items: flex-start;
            border: 1px solid var(--border-default);
        }
        .usp-tile i { font-size: 1.5rem; color: var(--brand-accent); margin-top: 4px; }
        .usp-tile strong { display: block; color: var(--text-primary); font-size: 1.1rem; margin-bottom: 4px; }
        .usp-tile p { margin: 0; font-size: 0.9rem; color: var(--text-muted); }

        .payment-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 3rem; }
        .pay-card { 
            background: var(--bg-surface); 
            border: 1px solid var(--border-default); 
            padding: 16px; 
            border-radius: var(--radius-md); 
            text-align: center; 
        }
        .pay-card i { font-size: 1.8rem; color: var(--text-primary); margin-bottom: 10px; display: block; }
        .pay-card strong { display: block; font-size: 1rem; color: var(--text-primary); margin-bottom: 8px; }
        .pay-card p { font-size: 0.8rem; color: var(--text-muted); margin: 0; line-height: 1.4; }

        .step-list { display: grid; grid-template-columns: 1fr; gap: 20px; margin-bottom: 3rem; }
        .step-item { 
            display: flex; 
            gap: 15px; 
            background: var(--bg-surface); 
            padding: 20px; 
            border-radius: var(--radius-md); 
            border: 1px solid var(--border-default); 
        }
        .step-num { 
            flex-shrink: 0; 
            width: 32px; 
            height: 32px; 
            background: var(--grad-brand); 
            border-radius: 50%; 
            display: flex; 
            align-items: center; 
            justify-content: center; 
            font-weight: 800; 
            color: var(--text-brand-contrast);
        }
        .step-content h3 { margin: 0 0 8px 0; }
        .step-content a { color: inherit; text-decoration: none; }

        .download-section { 
            background: var(--bg-elevated); 
            padding: 30px; 
            border-radius: var(--radius-lg); 
            text-align: center; 
            border: 1px solid var(--border-brand); 
            margin-bottom: 3rem; 
        }
        .download-section p { margin-bottom: 1.5rem; color: var(--text-secondary); }

        .guide-item { 
            background: var(--bg-surface); 
            padding: 20px; 
            border-radius: var(--radius-md); 
            margin-bottom: 15px; 
            border-left: 4px solid var(--brand-primary); 
        }
        .guide-meta { font-size: 0.8rem; color: var(--text-muted); display: block; margin-bottom: 10px; }

        .announcement-grid { display: grid; grid-template-columns: 1fr; gap: 15px; margin-bottom: 3rem; }
        .announcement-card { 
            background: var(--bg-surface); 
            padding: 20px; 
            border-radius: var(--radius-md); 
            border: 1px solid var(--border-default);
            display: flex;
            gap: 15px;
        }
        .announcement-card i { color: var(--brand-accent); font-size: 1.2rem; margin-top: 4px; }
        .announcement-date { display: block; font-size: 0.75rem; color: var(--text-muted); margin-top: 8px; }

        .faq-container { margin-bottom: 3rem; }
        .faq-item { background: var(--bg-surface); border-radius: var(--radius-md); margin-bottom: 10px; border: 1px solid var(--border-default); }
        .faq-item summary { padding: 16px; cursor: pointer; list-style: none; outline: none; }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item p { padding: 0 16px 16px 16px; color: var(--text-secondary); margin: 0; font-size: 0.95rem; }

        .about-section { background: var(--bg-surface); padding: 30px; border-radius: var(--radius-lg); border: 1px solid var(--border-strong); margin-bottom: 3rem; }
        .team-card { 
            margin-top: 2rem; 
            padding: 20px; 
            background: var(--bg-main); 
            border-radius: var(--radius-md); 
            border: 1px solid var(--border-default);
        }
        .team-card h3 { color: var(--brand-accent); }

        .security-section { background: var(--bg-elevated); padding: 30px; border-radius: var(--radius-lg); border: 1px solid var(--border-default); margin-bottom: 3rem; }
        .rg-links { display: flex; flex-wrap: wrap; gap: 15px; margin: 1.5rem 0; }
        .rg-link { background: var(--bg-main); padding: 8px 16px; border-radius: var(--radius-pill); font-size: 0.9rem; border: 1px solid var(--border-default); }

        footer { 
            background: var(--bg-surface); 
            padding: 40px 0 20px 0; 
            border-top: 1px solid var(--border-strong); 
            text-align: center; 
        }
        .footer-sitemap { 
            display: grid; 
            grid-template-columns: repeat(3, 1fr); 
            gap: 10px; 
            max-width: 600px; 
            margin: 0 auto 2rem auto; 
            text-align: center; 
        }
        .footer-sitemap a { font-size: 0.85rem; color: var(--text-muted); }
        .footer-contact { margin-bottom: 1.5rem; font-size: 0.9rem; }
        .footer-contact a { color: var(--text-primary); font-weight: 600; }
        .footer-legal { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; padding: 0 20px; }

        .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)); 
            z-index: 1000; 
        }
        .nav-item { 
            display: flex; 
            flex-direction: column; 
            align-items: center; 
            text-decoration: none; 
            color: var(--text-muted); 
            font-size: 0.7rem; 
            gap: 4px; 
        }
        .nav-item i { font-size: 1.2rem; }
        .nav-item:hover { color: var(--brand-accent); }
        
        .util-link { font-size: 0.85rem; color: var(--text-link); text-decoration: underline; }

        @media (min-width: 768px) {
            body { padding-inline: 24px; padding-bottom: 24px; }
            .category-hub { grid-template-columns: repeat(3, 1fr); }
            .game-grid { grid-template-columns: repeat(3, 1fr); }
            .payment-grid { grid-template-columns: repeat(4, 1fr); }
            .step-list { grid-template-columns: repeat(2, 1fr); }
            .promo-grid { grid-template-columns: repeat(3, 1fr); }
            .usp-bar { grid-template-columns: repeat(3, 1fr); }
            .announcement-grid { grid-template-columns: repeat(2, 1fr); }
            .navigator { display: none; }
        }

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

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