/* roulang page: index */
:root {
            --primary-blue: #1E3A8A;
            --accent-blue: #2563EB;
            --bg-gray: #F8FAFC;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-gray);
            color: #1e293b;
            overflow-x: hidden;
        }
        .card-custom-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
            transition: all 0.25s ease-in-out;
        }
        .card-custom-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px -4px rgba(15, 23, 42, 0.08), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
        }
        details summary::-webkit-details-marker {
            display: none;
        }