/* roulang page: index */
:root {
      --primary: #0D9488;
      --primary-hover: #0F766E;
      --accent: #D97706;
      --bg-dark: #0F172A;
      --bg-darker: #0B0F19;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .custom-scrollbar::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 3px;
    }
    .grid-pattern {
      background-size: 32px 32px;
      background-image: linear-gradient(to right, rgba(15, 23, 42, 0.04) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
    }
    .grid-pattern-dark {
      background-size: 32px 32px;
      background-image: linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    }
    .tab-active {
      border-color: #0D9488;
      color: #0D9488;
      background-color: #F0FDFA;
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
    }
    .faq-item.active .faq-content {
      max-height: 500px;
      transition: max-height 0.3s ease-in-out;
    }
    .faq-item.active .faq-chevron {
      transform: rotate(180deg);
    }