/* roulang page: index */
:root {
            --brand-deep: #0F2B48;
            --brand-blue: #1A56DB;
            --brand-cyan: #06B6D4;
            --bg-base: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #475569;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-base);
            -webkit-font-smoothing: antialiased;
        }
        .hero-pattern {
            background-image: radial-gradient(rgba(26, 86, 219, 0.12) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .card-hover-effect {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover-effect:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(15, 43, 72, 0.1), 0 8px 10px -6px rgba(15, 43, 72, 0.1);
            border-color: rgba(26, 86, 219, 0.3);
        }