:root {
            --brand-primary: #00A3FF;
            --brand-primary-hover: #33B5FF;
            --brand-secondary: #C0C0C8;
            --brand-accent: #00FFD1;
            --bg-main: #060B1A;
            --bg-surface: #0D152B;
            --bg-elevated: #16213D;
            --text-primary: #E6EBF5;
            --text-secondary: #AAB4C8;
            --text-muted: #7A869A;
            --border-default: #1F2B4A;
            --border-brand: #00A3FF;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 24px;
            --radius-pill: 9999px;
            --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
            --grad-brand: linear-gradient(135deg, #00A3FF 0%, #00FFD1 100%);
            --grad-button: linear-gradient(180deg, #00B4FF 0%, #00A3FF 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;
            background-color: var(--bg-main);
            color: var(--text-primary);
            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(--brand-primary); text-decoration: none; transition: color 0.2s; }
        a:hover { color: var(--brand-accent); }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            min-inline-size: 44px;
            padding: 12px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            cursor: pointer;
            border: none;
            transition: transform 0.2s, opacity 0.2s;
        }
        .btn-primary {
            background: var(--grad-button);
            color: var(--bg-main);
        }
        .btn-primary:hover { transform: translateY(-2px); opacity: 0.9; }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--brand-primary);
            color: var(--brand-primary);
        }
        .btn-outline:hover { background: rgba(0, 163, 255, 0.1); }
        
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            max-width: 1200px;
            margin: 0 auto;
        }
        .header-logo { display: flex; align-items: center; gap: 8px; }
        .header-logo strong { font-size: 16px; font-weight: normal; color: var(--text-primary); }
        .header-nav { display: flex; gap: 12px; }

        main { max-width: 1200px; margin: 0 auto; }
        h1 { font-size: clamp(1.6rem, 6.5vw, 2.4rem); line-height: 1.2; margin-bottom: 1rem; color: var(--text-primary); }
        h2 { font-size: clamp(1.3rem, 5.2vw, 1.8rem); line-height: 1.25; margin-top: 2rem; margin-bottom: 1.5rem; color: var(--text-primary); }
        h3 { font-size: clamp(1.05rem, 4.2vw, 1.25rem); line-height: 1.3; margin-bottom: 0.75rem; color: var(--text-primary); }

        .hero-section { padding: 40px 0; text-align: center; }
        .hero-intro { max-width: 800px; margin: 0 auto 24px; font-size: 1.1rem; color: var(--text-secondary); }
        .hero-cta-wrap { margin-bottom: 24px; }
        .btn-full { width: 100%; display: block; box-sizing: border-box; font-size: 1.2rem; }
        .hero-tags { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
        .tag-pill { 
            background: var(--bg-elevated); 
            border: 1px solid var(--border-default); 
            padding: 6px 14px; 
            border-radius: var(--radius-pill); 
            font-size: 0.85rem; 
            color: var(--text-secondary);
        }

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

        .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 32px 0; }
        .category-tile { 
            background: var(--bg-surface); 
            border: 1px solid var(--border-default); 
            padding: 20px; 
            border-radius: var(--radius-md); 
            text-align: center; 
            transition: border-color 0.3s;
        }
        .category-tile:hover { border-color: var(--brand-primary); }
        .category-tile i { font-size: 2rem; color: var(--brand-primary); margin-bottom: 12px; }
        .category-tile strong { display: block; margin-bottom: 8px; color: var(--text-primary); }
        .category-tile span { font-size: 0.85rem; color: var(--text-secondary); }

        .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;
            text-decoration: none;
            display: block;
        }
        .game-card:hover { transform: translateY(-5px); border-color: var(--brand-accent); }
        .game-card-img { aspect-ratio: 1/1; width: 100%; object-fit: cover; }
        .game-card-info { padding: 12px; text-align: center; }
        .game-card-info h3 { margin: 0; font-size: 1rem; color: var(--text-primary); }

        .facts-section { background: var(--bg-surface); padding: 24px; border-radius: var(--radius-lg); border: 1px solid var(--border-default); margin: 32px 0; }
        .freshness-notice { font-style: italic; color: var(--text-muted); font-size: 0.85rem; margin-bottom: 16px; }
        .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-secondary); width: 40%; }
        .facts-value { color: var(--text-primary); font-weight: 500; }
        .facts-footer { margin-top: 16px; font-size: 0.85rem; text-align: center; }

        .toc-nav { 
            display: flex; 
            overflow-x: auto; 
            gap: 12px; 
            padding: 16px 0; 
            margin: 24px 0;
            scrollbar-width: none;
        }
        .toc-nav::-webkit-scrollbar { display: none; }
        .toc-link { 
            background: var(--bg-elevated); 
            padding: 8px 16px; 
            border-radius: var(--radius-pill); 
            white-space: nowrap; 
            font-size: 0.9rem; 
            border: 1px solid var(--border-default);
        }

        .promo-grid { display: flex; flex-direction: column; gap: 16px; }
        .promo-card { 
            background: var(--bg-surface); 
            border: 1px solid var(--border-brand); 
            padding: 24px; 
            border-radius: var(--radius-md); 
            display: flex; 
            flex-direction: column; 
            gap: 16px;
        }
        .promo-card h3 { margin: 0; }
        .promo-body { color: var(--text-secondary); font-size: 0.95rem; }

        .usp-bar { display: grid; grid-template-columns: 1fr; gap: 16px; margin: 32px 0; }
        .usp-tile { 
            background: var(--bg-elevated); 
            padding: 20px; 
            border-radius: var(--radius-md); 
            display: flex; 
            gap: 16px; 
            align-items: flex-start;
            border: 1px solid var(--border-default);
        }
        .usp-tile i { color: var(--brand-accent); font-size: 1.5rem; margin-top: 4px; }
        .usp-content strong { display: block; color: var(--text-primary); margin-bottom: 4px; }
        .usp-content p { margin: 0; font-size: 0.9rem; color: var(--text-secondary); }

        .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(--brand-primary); margin-bottom: 8px; }
        .payment-card strong { display: block; margin-bottom: 8px; font-size: 0.95rem; }
        .payment-card p { margin: 0; font-size: 0.8rem; color: var(--text-secondary); }

        .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: 0.8rem; color: var(--text-muted); margin-bottom: 12px; display: block; }

        .steps-grid { display: flex; flex-direction: column; gap: 24px; }
        .step-item { display: flex; gap: 16px; align-items: flex-start; }
        .step-num { 
            background: var(--grad-brand); 
            color: var(--bg-main); 
            width: 32px; 
            height: 32px; 
            border-radius: 50%; 
            display: flex; 
            align-items: center; 
            justify-content: center; 
            font-weight: bold; 
            flex-shrink: 0;
        }

        .announcement-list { display: flex; flex-direction: column; gap: 16px; }
        .announcement-item { 
            background: var(--bg-surface); 
            padding: 16px; 
            border-radius: var(--radius-md); 
            border-left: 4px solid var(--brand-primary);
            display: flex;
            gap: 16px;
        }
        .announcement-item i { color: var(--brand-primary); font-size: 1.2rem; margin-top: 4px; }
        .announcement-content h3 { margin: 0 0 8px 0; font-size: 1.1rem; }
        .announcement-content p { margin: 0 0 8px 0; font-size: 0.9rem; color: var(--text-secondary); }
        .announcement-date { font-size: 0.8rem; color: var(--text-muted); }

        .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; justify-content: space-between; align-items: center; }
        summary::-webkit-details-marker { display: none; }
        summary h3 { margin: 0; font-size: 1.05rem; }
        .faq-answer { padding: 0 16px 16px; color: var(--text-secondary); font-size: 0.95rem; }

        .about-content { line-height: 1.8; color: var(--text-secondary); }
        .team-card { 
            background: var(--bg-elevated); 
            padding: 24px; 
            border-radius: var(--radius-md); 
            margin-top: 24px; 
            border: 1px solid var(--border-brand);
        }

        footer { 
            background: var(--bg-surface); 
            padding: 40px 0 20px; 
            margin-top: 60px; 
            border-top: 1px solid var(--border-default);
        }
        .footer-sitemap { 
            display: grid; 
            grid-template-columns: repeat(3, 1fr); 
            gap: 12px; 
            margin-bottom: 32px; 
            text-align: center;
        }
        .footer-contact { text-align: center; margin-bottom: 24px; padding-top: 24px; border-top: 1px solid var(--border-default); }
        .footer-legal { text-align: center; font-size: 0.85rem; color: var(--text-muted); }

        .navigator { 
            position: fixed; 
            inset-inline: 0; 
            bottom: 0; 
            background: rgba(13, 21, 43, 0.9); 
            backdrop-filter: blur(10px); 
            display: flex; 
            justify-content: space-around; 
            padding: 12px 0 calc(12px + env(safe-area-inset-bottom)); 
            border-top: 1px solid var(--border-default); 
            z-index: 1000;
        }
        .nav-item { text-align: center; color: var(--text-secondary); font-size: 0.75rem; text-decoration: none; }
        .nav-item i { display: block; font-size: 1.2rem; margin-bottom: 4px; }

        .util-link { font-weight: 500; text-decoration: underline; }

        section { content-visibility: auto; contain-intrinsic-size: 1px 500px; padding: 40px 0; }

        @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(2, 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); }
            .game-grid { grid-template-columns: repeat(4, 1fr); }
            .payment-grid { grid-template-columns: repeat(7, 1fr); }
            .usp-bar { grid-template-columns: repeat(4, 1fr); }
        }