/* roulang page: index */
*, *::before, *::after {
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: '-apple-system', 'BlinkMacSystemFont', '"Segoe UI"', '"PingFang SC"', '"Hiragino Sans GB"', '"Microsoft YaHei"', sans-serif;
      color: #2D3748;
      background-color: #F7F9FC;
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a, button, input, textarea {
      outline: none;
    }
    a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
      outline: 2px solid #C49A2B;
      outline-offset: 2px;
      border-radius: 4px;
    }
    .floating-image {
      animation: float 5s ease-in-out infinite;
    }
    @keyframes float {
      0% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
      100% { transform: translateY(0); }
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease-in-out, padding 0.4s ease-in-out;
    }
    .accordion-content.open {
      max-height: 200px;
      padding-top: 0.75rem;
      padding-bottom: 0.75rem;
    }
    .mobile-menu {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-in-out;
    }
    .mobile-menu.open {
      max-height: 400px;
    }
    .nav-link.active {
      border-bottom: 2px solid #C49A2B;
      color: #1A3C5E;
    }
    .card-hover {
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .card-hover:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 30px -10px rgba(0,0,0,0.08);
    }
    @media (max-width: 767px) {
      .hero-container {
        flex-direction: column;
        text-align: center;
      }
      .hero-text {
        order: 1;
      }
      .hero-image {
        order: 0;
        margin-bottom: 2rem;
      }
    }