/* roulang page: index */
:root {
      --primary: #0F2922;
      --forest: #123B2F;
      --accent: #10B981;
      --accent-orange: #F97316;
      --bg-light: #F8FAFC;
      --bg-dark: #0B1E19;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    body {
      color: var(--text-main);
      background-color: #FFFFFF;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(15, 41, 34, 0.94) 0%, rgba(18, 59, 47, 0.88) 100%), url('/assets/images/5d647e9070856166.jpg');
      background-size: cover;
      background-position: center;
    }
    .dark-section-bg {
      background-image: linear-gradient(180deg, rgba(11, 30, 25, 0.98) 0%, rgba(15, 41, 34, 0.96) 100%), url('/assets/images/e4109fe48a79ed98.jpg');
      background-size: cover;
      background-position: center;
    }
    .card-transition {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-transition:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(15, 41, 34, 0.08), 0 10px 10px -5px rgba(15, 41, 34, 0.04);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
    }
    .faq-item.active .faq-answer {
      max-height: 500px;
      transition: max-height 0.4s ease-in-out;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }
    .metric-number {
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
    }