/* roulang page: index */
:root {
      --bg-canvas: #F4F6F9;
      --card-bg: #FFFFFF;
      --primary-navy: #0F172A;
      --slate-steel: #1E293B;
      --accent-green: #059669;
      --accent-blue: #2563EB;
      --border-subtle: #E2E8F0;
      --text-muted: #64748B;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-canvas);
      color: #0F172A;
      overflow-x: hidden;
    }
    .custom-scrollbar::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .code-window {
      background: #0B0F17;
      border: 1px solid #1E293B;
      box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    }
    .hero-mesh {
      background-image: radial-gradient(rgba(37, 99, 235, 0.12) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    .section-dark {
      background-color: #0B0F17;
      background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
      background-size: 20px 20px;
    }