/* roulang page: index */
:root {
      --primary: #2563eb;
      --primary-dark: #1e40af;
      --accent-green: #059669;
      --accent-amber: #d97706;
      --midnight: #0f172a;
      --surface-light: #f8fafc;
      --surface-warm: #f1f5f9;
      --text-main: #0f172a;
      --text-body: #334155;
      --text-muted: #64748b;
      --border-color: #cbd5e1;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-body);
      background-color: #ffffff;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
    }
    .hover-lift {
      transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .hover-lift:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px -8px rgba(15, 23, 42, 0.12);
    }