/* roulang page: index */
:root {
      --primary: #1A56DB;
      --primary-hover: #1646b0;
      --accent: #EBF5FF;
      --accent-green: #0E9F6E;
      --bg-page: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --dark-navy: #0B132B;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-page);
      color: var(--text-main);
      overflow-x: hidden;
      line-height: 1.6;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(11, 19, 43, 0.92) 0%, rgba(26, 86, 219, 0.82) 100%), url('/assets/images/fd8fd7d7bfc481c8.webp');
      background-size: cover;
      background-position: center;
    }
    .dark-panel-bg {
      background-image: radial-gradient(circle at 10% 20%, rgba(26, 86, 219, 0.15) 0%, transparent 40%), radial-gradient(circle at 90% 80%, rgba(14, 159, 110, 0.12) 0%, transparent 45%);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
    }
    .accordion-item.active .accordion-content {
      max-height: 240px;
      padding-top: 1rem;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }