/* roulang page: index */
:root {
            --primary: #064e3b;
            --primary-accent: #10b981;
            --cta-color: #f97316;
            --bg-base: #f8fafc;
        }
        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background-color: var(--bg-base);
            color: #1e293b;
            overflow-x: hidden;
        }
        .backdrop-header {
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .mega-dropdown {
            visibility: hidden;
            opacity: 0;
            transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
            transform: translateY(8px);
        }
        .group:hover .mega-dropdown {
            visibility: visible;
            opacity: 1;
            transform: translateY(0);
        }
        details summary::-webkit-details-marker {
            display:none;
        }