/* roulang page: index */
:root {
      --brand: #00C076;
      --brand-dark: #0F9D58;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-light: #E2E8F0;
      --bg-light: #F8FAFC;
    }
    body {
      font-family: system-ui, -apple-system, PingFang SC, Microsoft YaHei, sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4, h5, h6 {
      letter-spacing: -0.02em;
    }
    .custom-container {
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .card-hover {
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-hover:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 25px -5px rgba(0, 192, 118, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
      border-color: rgba(0, 192, 118, 0.4);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }
    details[open] {
      background-color: #F8FAFC;
    }