/* roulang page: index */
:root {
            --primary: #1A2B32;
            --accent: #FF6B35;
            --surface: #F4F6F8;
            --border: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: #FFFFFF;
            color: #2D3748;
        }
        .cad-grid-pattern {
            background-size: 24px 24px;
            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);
        }
        .cad-dark-grid {
            background-size: 32px 32px;
            background-image: 
                linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
        }