/* roulang page: index */
:root {
            --primary: #1D4ED8;
            --accent: #0284C7;
            --dark: #0F172A;
            --surface: #FFFFFF;
            --bg-light: #F8FAFC;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: #334155;
            overflow-x: hidden;
        }
        .bg-pattern {
            background-image: radial-gradient(#1D4ED8 0.75px, transparent 0.75px);
            background-size: 24px 24px;
            opacity: 0.05;
        }
        .hero-banner {
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.75) 0%, rgba(15, 23, 42, 0.92) 100%), url('/assets/images/ea3b6f7856c4f7a5.jpg') center/cover no-repeat;
        }