/* roulang page: index */
:root {
      --primary-dark: #1E293B;
      --primary-teal: #0F766E;
      --accent-amber: #D97706;
      --bg-light: #F8FAFC;
      --bg-alt: #F1F5F9;
      --text-main: #0F172A;
      --text-sub: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.75;
      margin: 0;
      padding: 0;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(15, 118, 110, 0.88) 100%), url('/assets/images/b9152c15383d56cd.webp') center/cover no-repeat;
    }