/* roulang page: index */
:root {
            --bg-main: #0b0f19;
            --bg-card: rgba(17, 24, 39, 0.7);
            --cyan-glow: #00f0ff;
            --purple-glow: #8b5cf6;
            --border-glass: rgba(255, 255, 255, 0.08);
            --text-title: #f8fafc;
            --text-body: #94a3b8;
        }

        body {
            background-color: var(--bg-main);
            color: var(--text-title);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            line-height: 1.75;
            letter-spacing: -0.01em;
            overflow-x: hidden;
        }

        .glass-panel {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
        }

        .glow-btn {
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
            transition: all 0.3s ease;
        }

        .glow-btn:hover {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.65);
            transform: translateY(-2px);
        }

        .glow-btn-purple {
            box-shadow: 0 0 20px rgba(139, 92, 246, 0.35);
            transition: all 0.3s ease;
        }

        .glow-btn-purple:hover {
            box-shadow: 0 0 32px rgba(139, 92, 246, 0.65);
            transform: translateY(-2px);
        }

        .hud-border {
            position: relative;
        }
        .hud-border::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.8), transparent);
        }

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