/* roulang page: index */
:root {
      --primary: #1e40af;
      --primary-dark: #1e3a8a;
      --accent: #0284c7;
      --success: #10b981;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --text-main: #0f172a;
      --text-body: #334155;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
    }
    body {
      color: var(--text-body);
      background-color: var(--bg-light);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.82) 100%);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, opacity 0.3s ease-in;
      opacity: 0;
    }
    .accordion-item.active .accordion-content {
      max-height: 400px;
      opacity: 1;
    }
    .accordion-item.active .accordion-chevron {
      transform: rotate(180deg);
    }