body { margin:0; padding:0; font-family:sans-serif; background:#f4f4f4; color:#333; }
  header { text-align:center; background:#046bd2; color:#fff; padding:2em 1em; }
  header img { max-width:150px; height:auto; display:block; margin:0 auto 1em; }
  .btn { display:inline-block; background:#ee0707; color:white; padding:0.75em 1.5em; text-decoration:none; border-radius:4px; margin-top:1em; }
  nav ul { list-style:none; padding:0; margin:0; display:flex; justify-content:center; background:#045cb4;}
  nav ul li { margin:0 .5em; }
  nav ul li a { color:white; text-decoration:none; padding:.5em 1em; display:block; }
  main { max-width:800px; margin:2em auto; padding:0 1em; background:white; border-radius:6px; }
  h1,h2,h3 { color:#1e293b; }
  ol { margin-left:1.2em; }
  footer { text-align:center; padding:1em; background:#ddd; margin-top:2em; font-size:0.9em; }
  .faq-section { margin-top: 2em; }
  .faq-section h2 { margin-bottom: 0.5em; }
  .faq-item { margin-bottom: 1em; }
  .faq-item h3 { margin-bottom: 0.3em; font-size: 1.1em; }

  /* 通用导航样式 */
  nav {
    background: #045cb4;
  }

  nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
  }

  nav ul li {
    margin: 0;
  }

  nav ul li a {
    display: block;
    padding: 1em;
    color: white;
    text-decoration: none;
  }

  nav ul li a:hover {
    background: #034c90;
  }

  /* 移动设备隐藏横向菜单，显示按钮 */
  .menu-toggle {
    display: none;
    background: #046bd2;
    color: #fff;
    border: none;
    padding: 0.6em 1em;
    cursor: pointer;
    font-size: 1.2em;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1001;
    border-radius: 4px;
  }

  nav.mobile-sidebar {
    display: none;
    position: fixed;
    top: 0;
    left: -220px;
    width: 200px;
    height: 100%;
    background: #045cb4;
    overflow-x: hidden;
    transition: 0.3s;
    padding-top: 3rem;
    z-index: 1000;
    border-right: 3px solid #333;
  }

  nav.mobile-sidebar.open {
    left: 0;
  }

  nav.mobile-sidebar ul {
    display: block;
  }

  nav.mobile-sidebar ul li a {
    padding: 1rem;
    font-weight: bold;
  }

  /* 响应式切换 */
  @media (max-width: 768px) {
    nav.desktop-menu {
      display: none;
    }

    .menu-toggle {
      display: block;
    }

    nav.mobile-sidebar {
      display: block;
    }
  }

  body {
    font-family: Arial, sans-serif;
    background: #f8f9fa;
    margin: 0;
    padding: 0;
  }

  .about-container {
    max-width: 800px;
    margin: 50px auto;
    background: #ffffff;
    border: 1px solid #ccc;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  }

  .about-container h1 {
    margin-bottom: 20px;
    color: #045cb4;
  }

  .about-container p {
    line-height: 1.8;
    margin-bottom: 15px;
    font-size: 16px;
    color: #333;
  }

  footer {
    margin-top: 40px;
    font-size: 14px;
    color: #777;
  }
  .site-header {
    background-color: #fff;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 5px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
  }

  .site-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
  }

  .site-logo img {
    height: 36px;
    border-radius: 4px;
    margin-right: 10px;
  }

  .site-logo span {
    font-size: 18px;
    font-weight: bold;
    color: #111;
  }

  .nav-links {
    display: flex;
    gap: 15px;
  }

  .nav-links a {
    color: #045cb4;
    text-decoration: none;
    font-size: 15px;
  }

  .menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #045cb4;
  }

  @media (max-width: 600px) {
    .nav-links {
      display: none;
      flex-direction: column;
      background-color: #fff;
      position: absolute;
      top: 60px;
      right: 20px;
      border: 1px solid #ccc;
      padding: 10px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }

    .nav-links.active {
      display: flex;
    }

    .menu-toggle {
      display: block;
    }
  }