/* roulang page: index */
:root {
      --primary: #0F52BA;
      --primary-hover: #1e40af;
      --text-dark: #0f172a;
      --text-body: #334155;
      --text-muted: #64748b;
      --bg-light: #f8fafc;
      --border-color: #e2e8f0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: #ffffff;
      overflow-x: hidden;
    }
    .hero-gradient {
      background: linear-gradient(135deg, rgba(15, 82, 186, 0.95) 0%, rgba(15, 23, 42, 0.92) 100%);
    }
    .custom-shadow {
      box-shadow: 0 10px 30px -5px rgba(15, 82, 186, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    }
    .custom-shadow-hover:hover {
      box-shadow: 0 20px 35px -5px rgba(15, 82, 186, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
      transform: translateY(-4px);
    }
    details summary::-webkit-details-marker {
      display: none;
    }