/* roulang page: index */
:root {
            --primary: #0A5C66;
            --primary-hover: #07424A;
            --mint: #10B981;
            --sky: #0284C7;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --bg-clean: #F8FAFC;
            --shadow-card: 0 4px 20px rgba(10, 92, 102, 0.06);
            --shadow-hover: 0 12px 28px rgba(10, 92, 102, 0.12);
        }
        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background-color: var(--bg-clean);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        .text-gradient {
            background: linear-gradient(135deg, #0A5C66 0%, #0284C7 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .card-subtle {
            background: #FFFFFF;
            border: 1px solid rgba(226, 232, 240, 0.9);
            box-shadow: var(--shadow-card);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-subtle:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: rgba(10, 92, 102, 0.25);
        }
        details summary::-webkit-details-marker {
            display: none;
        }
        .custom-scrollbar::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        .custom-scrollbar::-webkit-scrollbar-thumb {
            background-color: #CBD5E1;
            border-radius: 4px;
        }