/* roulang page: index */
:root {
            --primary-deep: #071626;
            --primary-blue: #0F4C81;
            --accent-cyan: #00A3E0;
            --bg-light: #F8FAFC;
        }
        .code-preview {
            background: #0d1b2a;
            border-left: 3px solid #00A3E0;
        }
        .text-gradient {
            background: linear-gradient(135deg, #00A3E0 0%, #60A5FA 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

body{font-family:"Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7;color:#1f2937;background:#f7f9fc}
  header,footer{background:#0f172a;color:#fff} header a,footer a{color:inherit;text-decoration:none}
  main section{padding:64px 0} .container{max-width:1180px}
  .hero,.site-hero{background:linear-gradient(135deg,#0f172a,#1d4ed8);color:#fff}
  .card,.feature-card,.service-card,.category-card{border:1px solid rgba(15,23,42,.08);box-shadow:0 12px 32px rgba(15,23,42,.08);border-radius:16px}
  .btn,.button,a[class*="btn"]{border-radius:999px;font-weight:700}
  img{max-width:100%;height:auto} @media(max-width:768px){main section{padding:42px 0} h1{font-size:2rem}}