/* roulang page: index */
:root {
            --bg-base: #0B0D14;
            --bg-surface: #141724;
            --brand-purple: #7C3AED;
            --brand-cyan: #06B6D4;
            --text-main: #F8FAFC;
            --text-sub: #94A3B8;
            --border-dim: rgba(255, 255, 255, 0.08);
            --border-bright: rgba(124, 58, 237, 0.35);
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            overflow-x: hidden;
        }
        .neon-glow {
            box-shadow: 0 0 25px -5px rgba(124, 58, 237, 0.4), 0 0 10px -3px rgba(6, 182, 212, 0.3);
        }
        .card-ambient {
            background: linear-gradient(145deg, rgba(20, 23, 36, 0.85) 0%, rgba(15, 17, 28, 0.95) 100%);
            border: 1px solid var(--border-dim);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-ambient:hover {
            border-color: rgba(6, 182, 212, 0.45);
            transform: translateY(-4px);
            box-shadow: 0 12px 30px -10px rgba(124, 58, 237, 0.25);
        }
        .grid-bg-overlay {
            background-image: radial-gradient(rgba(124, 58, 237, 0.15) 1px, transparent 1px);
            background-size: 32px 32px;
        }