/* roulang page: index */
:root {
            --primary: #0F2744;
            --accent: #F26419;
            --tech-blue: #1D58A7;
            --bg-light: #F8FAFC;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            -webkit-font-smoothing: antialiased;
        }
        .container {
            max-width: 1280px;
        }
        .transition-fast {
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .accordion-content.active {
            max-height: 280px;
        }