/* roulang page: index */
:root {
      --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    }
    body {
      font-family: var(--font-sans);
      color: #1C252C;
      background-color: #FFFFFF;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(11, 59, 72, 0.94) 0%, rgba(18, 24, 27, 0.92) 100%);
    }
    .dark-mask {
      background: radial-gradient(circle at center, #1A2421 0%, #12181B 100%);
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 9999px;
    }
    .faq-content {
      max-height: 0;
      transition: max-height 0.35s ease-out;
      overflow: hidden;
    }
    .faq-open .faq-content {
      max-height: 300px;
    }
    .faq-open .faq-icon {
      transform: rotate(180deg);
    }