/* roulang page: index */
:root {
            --primary: #0F4C5C;
            --primary-light: #0E7490;
            --secondary: #0D9488;
            --secondary-light: #10B981;
            --accent: #F97316;
            --dark-navy: #0A192F;
            --paper-bg: #F8FAFC;
            --card-border: #E2E8F0;
            --text-main: #0F172A;
            --text-muted: #64748B;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            color: var(--text-main);
            background-color: var(--paper-bg);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

        html {
            scroll-behavior: smooth;
        }

        .med-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
        }

        .med-shadow-hover:hover {
            box-shadow: 0 10px 30px -4px rgba(15, 76, 92, 0.12), 0 4px 10px -2px rgba(15, 76, 92, 0.06);
            transform: translateY(-2px);
        }

        .nav-link {
            position: relative;
            transition: color 0.2s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            width: 0;
            height: 2px;
            background-color: var(--primary-light);
            transition: all 0.25s ease;
            transform: translateX(-50%);
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }

        /* 选型测评卡片状态 */
        .option-badge.active {
            border-color: var(--secondary);
            background-color: #F0FDFA;
            color: var(--primary);
        }

        /* 移动端菜单抽屉 */
        #mobile-menu {
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }