/* roulang page: index */
:root {
      --primary: #1E56A0;
      --primary-dark: #163E75;
      --accent: #00A8CC;
      --accent-orange: #F5A623;
      --bg-page: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #64748B;
    }
    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;
    }
    .shadow-soft {
      box-shadow: 0 10px 30px -5px rgba(30, 86, 160, 0.08);
    }
    .shadow-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .shadow-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 35px -5px rgba(30, 86, 160, 0.15);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-content.active {
      max-height: 240px;
    }