/* roulang page: index */
:root {
            --primary: #1D4ED8;
            --accent: #10B981;
            --bg-light: #F8FAFC;
            --text-main: #1E293B;
            --text-muted: #64748B;
        }
        body {
            color: var(--text-main);
            background-color: #FFFFFF;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            scroll-behavior: smooth;
        }
        .soft-shadow {
            box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
        }
        .hero-pattern {
            background-image: linear-gradient(135deg, rgba(29, 78, 216, 0.03) 0%, rgba(16, 185, 129, 0.03) 100%);
        }
        .accordion-content {
            transition: max-height 0.3s ease-out, opacity 0.3s ease;
        }