/* roulang page: index */
:root {
      --primary: #0F172A;
      --secondary: #1E293B;
      --accent: #EA580C;
      --accent-hover: #C2410C;
      --tech-cyan: #0EA5E9;
      --bg-light: #F8FAFC;
      --bg-subtle: #F1F5F9;
      --text-main: #1E293B;
      --text-muted: #475569;
      --border-color: #E2E8F0;
    }
    body {
      font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.68;
      overflow-x: hidden;
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(30, 41, 59, 0.90) 100%), url('/assets/images/c614b466d8794df3.webp');
      background-size: cover;
      background-position: center;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 4px;
      width: 4px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .faq-item[open] .faq-icon {
      transform: rotate(180deg);
    }
    .trans-card {
      transition: all 0.25s ease-in-out;
    }
    .trans-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 24px -10px rgba(15, 23, 42, 0.12);
    }