/* roulang page: index */
:root {
            --primary: #1E3A8A;
            --accent: #D97706;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #334155;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #ffffff;
            line-height: 1.75;
        }
        .hero-pattern {
            background-image: linear-gradient(rgba(15, 23, 42, 0.88), rgba(30, 58, 138, 0.85)), url('/assets/images/a7e30ea8ac952d65.webp');
            background-size: cover;
            background-position: center;
        }
        .section-alt {
            background-color: var(--bg-light);
        }
        .card-custom {
            border: 1px solid rgba(226, 232, 240, 0.8);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px -10px rgba(15, 23, 42, 0.12);
            border-color: #cbd5e1;
        }