/* roulang page: index */
:root {
      --primary: #0D9488;
      --primary-hover: #0F766E;
      --bg-mist: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-mist);
      font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .custom-container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(20, 184, 166, 0.15), transparent 70%);
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, opacity 0.3s ease;
      opacity: 0;
    }
    .faq-content.open {
      max-height: 250px;
      opacity: 1;
    }
    .chevron-icon {
      transition: transform 0.3s ease;
    }
    .chevron-icon.rotate {
      transform: rotate(180deg);
    }