/* roulang page: index */
:root {
            --brand-primary: #0F766E;
            --brand-hover: #0D9488;
            --brand-accent: #14B8A6;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-body);
            background-color: #FFFFFF;
            scroll-behavior: smooth;
        }
        .hero-diagonal {
            clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
        }
        @media (max-width: 768px) {
            .hero-diagonal {
                clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
            }
        }