/* roulang page: index */
:root {
      --primary: #00E599;
      --primary-dark: #00B87A;
      --dark-bg: #0B0F19;
      --card-bg: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #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: #F8FAFC;
      overflow-x: hidden;
    }
    .custom-scrollbar::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 9999px;
    }
    .tech-grid-bg {
      background-size: 30px 30px;
      background-image: linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    }
    .faq-answer {
      transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
      max-height: 0;
      opacity: 0;
      overflow: hidden;
    }
    .faq-answer.open {
      max-height: 300px;
      opacity: 1;
    }