/* roulang page: index */
:root {
            --primary: #0d9488;
            --primary-hover: #0f766e;
            --accent: #f59e0b;
            --dark-bg: #0f172a;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #f8fafc;
            overflow-x: hidden;
            line-height: 1.75;
        }
        .hero-gradient {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(13, 148, 136, 0.85) 100%);
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(13, 148, 136, 0.1), 0 8px 10px -6px rgba(13, 148, 136, 0.1);
        }
        details summary::-webkit-details-marker {
            display: none;
        }