/* roulang page: index */
:root {
      --primary: #0F3E6D;
      --accent: #C28836;
      --dark: #0F172A;
      --light: #F8FAFC;
      --text: #1E293B;
      --muted: #475569;
      --border: #E2E8F0;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      color: var(--text);
      background-color: #FFFFFF;
      line-height: 1.75;
      letter-spacing: 0.02em;
      -webkit-font-smoothing: antialiased;
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(15, 62, 109, 0.94) 0%, rgba(15, 23, 42, 0.92) 100%), url('/assets/images/d2d9965395d8d7cb.webp');
      background-size: cover;
      background-position: center;
    }
    .custom-scroll::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 3px;
    }
    .custom-scroll::-webkit-scrollbar-track {
      background: #F1F5F9;
    }
    .card-hover {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-item.active .accordion-content {
      max-height: 280px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }