/* roulang page: index */
:root {
            --bg-primary: #070b19;
            --bg-secondary: #0d1527;
            --card-surface: rgba(17, 28, 53, 0.72);
            --border-glass: rgba(255, 255, 255, 0.08);
            --brand-cyan: #06b6d4;
            --brand-blue: #2563eb;
        }
        body {
            background-color: var(--bg-primary);
            color: #94a3b8;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .glass-panel {
            background: var(--card-surface);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-glass);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glass-panel:hover {
            border-color: rgba(6, 182, 212, 0.35);
            box-shadow: 0 12px 30px -10px rgba(6, 182, 212, 0.2);
        }
        .glow-btn {
            background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.35);
            transition: all 0.3s ease;
        }
        .glow-btn:hover {
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.65);
            transform: translateY(-2px);
        }
        .coupon-ticket {
            background: radial-gradient(circle at 0 50%, transparent 12px, #111c35 13px) 0 0/100% 100%,
                        radial-gradient(circle at 100% 50%, transparent 12px, #111c35 13px) 0 0/100% 100%;
            border: 1px solid rgba(6, 182, 212, 0.25);
        }