/* roulang page: index */
:root {
            --brand-cyan: #00e5ff;
            --brand-emerald: #10b981;
            --brand-bg: #070b14;
            --brand-surface: #0d1527;
        }
        body {
            background-color: var(--brand-bg);
            color: #cbd5e1;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .glow-btn {
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
            transition: all 0.3s ease;
        }
        .glow-btn:hover {
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.75);
            transform: translateY(-1px);
        }
        .glow-card {
            border: 1px solid rgba(0, 229, 255, 0.15);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glow-card:hover {
            border-color: rgba(0, 229, 255, 0.45);
            transform: translateY(-4px);
            box-shadow: 0 12px 30px -10px rgba(0, 229, 255, 0.15);
        }
        .text-glow {
            text-shadow: 0 0 15px rgba(0, 229, 255, 0.6);
        }