/* roulang page: index */
:root {
      --primary: #0F5132;
      --secondary: #FF6B00;
      --bg-light: #F8FAF9;
      --text-dark: #1E293B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      color: #1E293B;
      background-color: #F8FAF9;
      line-height: 1.75;
      overflow-x: hidden;
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 81, 50, 0.94) 0%, rgba(17, 24, 39, 0.92) 100%);
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background-color: #CBD5E1;
      border-radius: 4px;
    }
    .card-transition {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-item.active .accordion-content {
      max-height: 300px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }