/* roulang page: index */
:root {
            --bg-deep: #050814;
            --bg-dark: #0B1226;
            --bg-surface: #0e1730;
            --primary-blue: #2563EB;
            --cyan-glow: #00D2FE;
            --neon-emerald: #10B981;
            --text-main: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(0, 210, 254, 0.35);
        }

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

        .glass-panel {
            background: rgba(15, 23, 42, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
            transition: all 0.3s ease;
        }

        .glass-panel:hover {
            border-color: var(--border-glow);
            box-shadow: 0 12px 36px 0 rgba(0, 210, 254, 0.15);
        }

        .btn-glow {
            background: linear-gradient(135deg, #00D2FE 0%, #2563EB 100%);
            color: #ffffff;
            box-shadow: 0 0 18px rgba(0, 210, 254, 0.4);
            transition: all 0.25s ease-in-out;
        }

        .btn-glow:hover {
            box-shadow: 0 0 28px rgba(0, 210, 254, 0.75);
            transform: translateY(-2px);
        }

        .btn-glow-subtle {
            background: rgba(37, 99, 235, 0.15);
            border: 1px solid rgba(0, 210, 254, 0.3);
            color: #00D2FE;
            transition: all 0.25s ease-in-out;
        }

        .btn-glow-subtle:hover {
            background: rgba(0, 210, 254, 0.2);
            border-color: #00D2FE;
            box-shadow: 0 0 16px rgba(0, 210, 254, 0.35);
        }

        .text-gradient-cyan {
            background: linear-gradient(135deg, #F8FAFC 20%, #00D2FE 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .text-gradient-neon {
            background: linear-gradient(135deg, #00D2FE 0%, #10B981 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .radial-bg {
            background: radial-gradient(circle at 50% 20%, rgba(37, 99, 235, 0.18), transparent 70%);
        }

        .pulse-indicator {
            box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
            animation: pulse-ring 2s infinite cubic-bezier(0.4, 0, 0.6, 1);
        }

        @keyframes pulse-ring {
            0% {
                box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
            }
            70% {
                box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
            }
        }

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