/* roulang page: index */
:root {
      --primary: #FF5500;
      --primary-hover: #D94800;
      --dark: #121417;
      --sub-dark: #1E232B;
      --titanium: #2C313A;
      --border-color: #E5E7EB;
      --bg-base: #F8F9FA;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: #1F2937;
      -webkit-font-smoothing: antialiased;
    }
    .metric-font {
      font-family: "DIN Alternate", "Chakra Petch", monospace, sans-serif;
      font-feature-settings: "tnum";
    }
    .hero-bg {
      background-image: linear-gradient(to right, rgba(18, 20, 23, 0.94) 0%, rgba(18, 20, 23, 0.78) 60%, rgba(18, 20, 23, 0.4) 100%), url('/assets/images/ace7cab93227eae2.png');
      background-size: cover;
      background-position: center;
    }
    .card-transition {
      transition: transform 250ms ease-out, border-color 250ms ease-out, box-shadow 250ms ease-out;
    }
    .card-transition:hover {
      transform: translateY(-4px);
    }
    .active-accordion .accordion-arrow {
      transform: rotate(180deg);
    }
    .active-accordion .accordion-body {
      display: block;
    }