/* roulang page: index */
:root {
            --bg-main: #0A0E17;
            --bg-card: #111827;
            --border-color: #1E293B;
            --emerald-glow: rgba(16, 185, 129, 0.15);
        }
        body {
            background-color: var(--bg-main);
            color: #CBD5E1;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .hero-glow {
            background: radial-gradient(circle at 50% 30%, rgba(16, 185, 129, 0.12), transparent 70%);
        }
        .card-glow:hover {
            box-shadow: 0 10px 30px -10px var(--emerald-glow);
            border-color: rgba(16, 185, 129, 0.4);
            transform: translateY(-4px);
        }
        .nav-glass {
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            background-color: rgba(10, 14, 23, 0.88);
        }
        .tab-btn.active {
            background-color: #10B981;
            color: #0A0E17;
            font-weight: 600;
        }