/* roulang page: index */
:root {
            --primary: #1E40AF;
            --accent: #0284C7;
            --bg-light: #F8FAFC;
            --bg-subtle: #F1F5F9;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-body);
            background-color: #FFFFFF;
        }
        .hero-pattern {
            background-image: radial-gradient(rgba(2, 132, 199, 0.08) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .dark-grid-pattern {
            background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
            background-size: 20px 20px;
        }