/* roulang page: index */
:root {
            --bg-deep: #070a12;
            --bg-card: rgba(15, 23, 42, 0.75);
            --primary-glow: #38bdf8;
            --accent-purple: #6366f1;
            --border-glow: rgba(56, 189, 248, 0.18);
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
        }

        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            font-family: system-ui, -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            overflow-x: hidden;
        }

        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .glass-card:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: 0 16px 36px -12px rgba(56, 189, 248, 0.2);
        }

        .glow-btn {
            background: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
            box-shadow: 0 0 24px rgba(56, 189, 248, 0.35);
            transition: all 0.3s ease;
        }

        .glow-btn:hover {
            box-shadow: 0 0 35px rgba(56, 189, 248, 0.6);
            transform: translateY(-2px);
        }

        .text-glow {
            text-shadow: 0 0 15px rgba(56, 189, 248, 0.5);
        }

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