/* roulang page: index */
:root {
            --primary: #1D4ED8;
            --primary-hover: #1E40AF;
            --accent: #0EA5E9;
            --bg-light: #F8FAFC;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-body);
        }
        .dropdown-menu {
            display: none;
        }
        .dropdown-wrapper:hover .dropdown-menu {
            display: block;
        }
        details summary::-webkit-details-marker {
            display: none;
        }