/* roulang page: index */
:root {
            --brand-main: #1E3A8A;
            --brand-primary: #2563EB;
            --brand-accent: #10B981;
            --brand-dark: #0F172A;
            --surface-ground: #F8FAFC;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--surface-ground);
            color: #334155;
            line-height: 1.65;
        }
        .hero-banner-bg {
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(30, 58, 138, 0.88) 100%), url('/assets/images/b9c29ad6ef069d9c.jpg');
            background-size: cover;
            background-position: center;
        }
        .cta-banner-bg {
            background-image: linear-gradient(135deg, rgba(11, 15, 25, 0.95) 0%, rgba(30, 58, 138, 0.9) 100%), url('/assets/images/cd06020bde077ddd.jpg');
            background-size: cover;
            background-position: center;
        }
        .feature-card {
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
        }