/* roulang page: index */
:root {
            --primary: #1D4ED8;
            --primary-hover: #1E40AF;
            --accent: #0EA5E9;
            --dark: #0F172A;
            --surface: #F8FAFC;
            --surface-alt: #F1F5F9;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        body {
            color: #334155;
            background-color: #FFFFFF;
        }
        .hero-pattern {
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(29, 78, 216, 0.82)), url('/assets/images/bad21e1d89b24c0c.jpg');
            background-size: cover;
            background-position: center;
        }
        .sub-pattern {
            background-image: linear-gradient(rgba(15, 23, 42, 0.94), rgba(15, 23, 42, 0.94)), url('/assets/images/4b2c62e94d77da57.webp');
            background-size: cover;
            background-position: center;
        }
        .card-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(29, 78, 216, 0.12);
        }
        .custom-scrollbar::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        .custom-scrollbar::-webkit-scrollbar-thumb {
            background: #CBD5E1;
            border-radius: 4px;
        }