/* roulang page: index */
:root {
            --brand-primary: #0F4C81;
            --brand-secondary: #0D9488;
            --brand-accent: #F59E0B;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --bg-light: #F8FAFC;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-dark);
            background-color: #FFFFFF;
            overflow-x: hidden;
        }
        .hero-pattern {
            background-image: linear-gradient(rgba(11, 25, 44, 0.88), rgba(15, 76, 129, 0.92)), url('/assets/images/a3417165614b5a7a.webp');
            background-size: cover;
            background-position: center;
        }
        .deep-immersed {
            background-image: linear-gradient(rgba(11, 19, 43, 0.95), rgba(11, 19, 43, 0.95)), url('/assets/images/bf619bac26a2e018.webp');
            background-size: cover;
            background-position: center;
        }
        .text-shadow {
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
        }