/* roulang page: index */
:root {
            --color-primary: #2563EB;
            --color-dark: #0F172A;
            --color-accent: #10B981;
            --bg-page: #F8FAFC;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-page);
            color: #1E293B;
            overflow-x: hidden;
        }
        .bg-grid-pattern {
            background-size: 32px 32px;
            background-image: 
                linear-gradient(to right, rgba(226, 232, 240, 0.4) 1px, transparent 1px),
                linear-gradient(to bottom, rgba(226, 232, 240, 0.4) 1px, transparent 1px);
        }
        .hero-overlay {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 58, 138, 0.85) 100%);
        }
        details > summary::-webkit-details-marker {
            display: none;
        }
        details summary {
            list-style: none;
        }