/* roulang page: index */
:root {
            --primary: #0284C7;
            --primary-dark: #0369A1;
            --text-main: #0F172A;
            --text-muted: #475569;
            --bg-light: #F8FAFC;
        }
        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;
            scroll-behavior: smooth;
        }
        .hero-overlay {
            background: linear-gradient(180deg, rgba(11, 17, 32, 0.75) 0%, rgba(11, 17, 32, 0.9) 100%);
        }
        .code-syntax {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }