/* roulang page: index */
:root {
            --brand-primary: #1E40AF;
            --brand-secondary: #0D9488;
            --bg-base: #FFFFFF;
            --bg-subtle: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #475569;
            --border-ui: #E2E8F0;
        }
        body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-base);
            overflow-x: hidden;
        }
        .hero-diagonal {
            clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
        }
        @media (max-width: 768px) {
            .hero-diagonal {
                clip-path: none;
            }
        }