/* roulang page: index */
:root {
      --primary-color: #0F766E;
      --primary-hover: #0D625C;
      --accent-blue: #0284C7;
      --accent-orange: #F97316;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-body);
      background-color: var(--bg-light);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 118, 110, 0.82) 100%);
    }
    .custom-scrollbar::-webkit-scrollbar {
      height: 6px;
      width: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .custom-scrollbar::-webkit-scrollbar-track {
      background: #F1F5F9;
    }
    .tech-grid-pattern {
      background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
      background-size: 24px 24px;
    }