/* roulang page: index */
:root {
            --primary: #1B58C9;
            --accent: #00A3A6;
            --dark: #0B192C;
            --bg-light: #F8FAFC;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: #FFFFFF;
            color: #0F172A;
            scroll-behavior: smooth;
        }
        .hero-bg {
            background-image: linear-gradient(to right, rgba(11, 25, 44, 0.92) 0%, rgba(11, 25, 44, 0.75) 50%, rgba(27, 88, 201, 0.6) 100%), url('/assets/images/a86bb9ddafc21230.png');
            background-size: cover;
            background-position: center;
        }
        .deep-banner {
            background-image: linear-gradient(to bottom, rgba(11, 25, 44, 0.96), rgba(11, 25, 44, 0.98)), url('/assets/images/41145f6193711aa1.png');
            background-size: cover;
            background-position: center;
        }
        .shadow-soft {
            box-shadow: 0 10px 30px -5px rgba(27, 88, 201, 0.06), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
        }
        .shadow-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 35px -5px rgba(27, 88, 201, 0.12), 0 8px 12px -3px rgba(0, 0, 0, 0.04);
        }
        .accordion-content {
            transition: max-height 0.3s ease-out, opacity 0.3s ease;
        }