/* roulang page: index */
:root {
      --primary: #1d4ed8;
      --primary-hover: #1e40af;
      --accent: #0284c7;
      --accent-teal: #0d9488;
      --text-main: #0f172a;
      --text-sub: #334155;
      --text-muted: #64748b;
      --bg-page: #f8fafc;
      --card-border: #e2e8f0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-page);
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
    }
    .custom-shadow:hover {
      box-shadow: 0 16px 32px -4px rgba(29, 78, 216, 0.12);
    }
    .details-animated[open] summary svg {
      transform: rotate(180deg);
    }
    .details-animated summary::-webkit-details-marker {
      display: none;
    }
    .banner-slide {
      transition: opacity 0.6s ease-in-out;
    }