/* roulang page: index */
:root {
            --brand-primary: #1a365d;
            --brand-secondary: #2b6cb0;
            --brand-accent: #0d9488;
            --surface-bg: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #64748b;
        }
        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
        }
        .hero-pattern {
            background-image: linear-gradient(to right, rgba(15, 23, 42, 0.92), rgba(26, 54, 93, 0.88)), url('/assets/images/9e98c959722047d3.png');
            background-size: cover;
            background-position: center;
        }
        .deep-pattern {
            background-image: linear-gradient(to bottom, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.98)), url('/assets/images/ba5dfa8cd6c00ce5.jpg');
            background-size: cover;
            background-position: center;
        }
        .card-glow:hover {
            box-shadow: 0 20px 25px -5px rgba(43, 108, 176, 0.12), 0 10px 10px -5px rgba(13, 148, 136, 0.08);
            transform: translateY(-6px);
        }