/* roulang page: index */
:root {
            --primary-navy: #1A365D;
            --primary-orange: #EA580C;
            --bg-light: #F8FAFC;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
        }
        .section-separator {
            border-bottom: 1px solid var(--border-color);
        }
        .hero-diagonal-bg {
            clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
        }
        .btn-bounce {
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .btn-bounce:hover {
            transform: translateY(-2px);
        }