/* roulang page: index */
:root {
            --bg-deep: #060b19;
            --bg-pitch: #0a1128;
            --tech-blue: #00d2ff;
            --tech-green: #00f59b;
            --warning-amber: #ffb703;
            --text-primary: #ffffff;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-glow: rgba(0, 210, 255, 0.18);
            --card-glass: rgba(15, 23, 42, 0.72);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-deep);
            color: var(--text-primary);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }

        .glass-card {
            background: var(--card-glass);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-glow);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .glass-card:hover {
            border-color: rgba(0, 245, 155, 0.4);
            transform: translateY(-3px);
            box-shadow: 0 10px 30px -10px rgba(0, 210, 255, 0.2);
        }

        .btn-glow {
            box-shadow: 0 0 20px rgba(0, 210, 255, 0.4);
            transition: all 0.3s ease;
        }

        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(0, 245, 155, 0.6);
            transform: translateY(-2px);
        }

        .btn-green-glow {
            box-shadow: 0 0 20px rgba(0, 245, 155, 0.45);
            transition: all 0.3s ease;
        }

        .btn-green-glow:hover {
            box-shadow: 0 0 32px rgba(0, 245, 155, 0.75);
            transform: translateY(-2px);
        }

        .coupon-ticket {
            background: linear-gradient(135deg, rgba(16, 36, 75, 0.85) 0%, rgba(8, 20, 48, 0.95) 100%);
            border: 1px dashed rgba(0, 245, 155, 0.4);
            position: relative;
        }

        .coupon-ticket::before, .coupon-ticket::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            background-color: var(--bg-deep);
            border-radius: 50%;
            top: 50%;
            transform: translateY(-50%);
        }
        .coupon-ticket::before { left: -10px; border-right: 1px solid rgba(0, 245, 155, 0.4); }
        .coupon-ticket::after { right: -10px; border-left: 1px solid rgba(0, 245, 155, 0.4); }

        .radar-grid {
            background-image: radial-gradient(circle, rgba(0, 210, 255, 0.15) 1px, transparent 1px);
            background-size: 24px 24px;
        }

        details summary::-webkit-details-marker {
            display: none;
        }

        @keyframes pulse-slow {
            0%, 100% { opacity: 0.3; transform: scale(1); }
            50% { opacity: 0.6; transform: scale(1.05); }
        }

        .animate-ambient {
            animation: pulse-slow 8s infinite ease-in-out;
        }