/* roulang page: index */
:root {
      --primary: #123830;
      --accent: #FF5A1F;
      --dark: #0B252C;
      --night: #0E1719;
      --surface: #F8F9FA;
      --line: #E5E7EB;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: #111827;
      background-color: #FFFFFF;
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .hero-angled-clip {
      clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
    }
    @media (max-width: 768px) {
      .hero-angled-clip {
        clip-path: polygon(0 0, 100% 0, 100% 96%, 0 100%);
      }
    }
    .card-hover-trans {
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    }
    .card-hover-trans:hover {
      transform: translateY(-3px);
      border-color: #FF5A1F;
      box-shadow: 0 12px 24px -4px rgba(11, 37, 44, 0.08);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }