/* roulang page: index */
:root {
      --primary-navy: #1E293B;
      --primary-blue: #2563EB;
      --accent-teal: #0D9488;
      --accent-amber: #F59E0B;
      --bg-light: #F8FAFC;
      --text-main: #334155;
      --text-title: #0F172A;
    }
    body {
      font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.75;
      margin: 0;
      padding: 0;
    }
    .hero-bg {
      background-image: linear-gradient(rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.82)), url('/assets/images/1b939b1274e93594.jpg');
      background-size: cover;
      background-position: center;
    }
    .cta-banner-bg {
      background-image: linear-gradient(rgba(30, 41, 59, 0.92), rgba(15, 23, 42, 0.95)), url('/assets/images/d4b199613dbb0eb7.webp');
      background-size: cover;
      background-position: center;
    }
    .smooth-scroll {
      scroll-behavior: smooth;
    }
    .tab-content {
      display: none;
    }
    .tab-content.active {
      display: block;
    }