/* roulang page: index */
:root {
            --primary: #0F4C81;
            --secondary: #008080;
            --darkslate: #0B132B;
            --text-main: #1E293B;
            --text-muted: #64748B;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--text-main);
            background-color: #FFFFFF;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            -webkit-font-smoothing: antialiased;
        }
        .hero-pattern {
            background-color: #0B132B;
            background-image: radial-gradient(rgba(56, 189, 248, 0.12) 1px, transparent 1px), radial-gradient(rgba(15, 76, 129, 0.15) 1px, #0B132B 1px);
            background-size: 32px 32px;
            background-position: 0 0, 16px 16px;
        }
        .code-font {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
        }