<style>
        /* 新增三端适配代码 */
        @media (max-width: 480px) {
            body { padding: 1em; }
            nav.directory a { font-size: 14px; }
            .images img { width: 100%; }
        }

        @media (min-width: 481px) and (max-width: 1024px) {
            body { padding: 1.5em; }
            nav.directory { max-width: 90%; }
            .images { justify-content: center; }
        }
    body {
      font-family: "Microsoft YaHei", sans-serif;
      margin: 0;
      padding: 2em;
      background-color: #f4f4f4;
      color: #333;
    }
    h1, h2, h3 {
      color: #1a73e8;
    }
    .directory {
      background-color: #ffffff;
      border: 1px solid #ccc;
      padding: 1em;
      border-radius: 8px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.05);
      margin-bottom: 2em;
    }
    
.directory a {
    display: block;
    padding: 15px 25px;
    margin-bottom: 8px;
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 25px;
    text-decoration: none;
    color: #1a73e8;
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
}

.directory a:hover {
    background: #f1f3f5;
    border-color: #2a6496;
    transform: translateX(10px);
    box-shadow: 3px 3px 10px rgba(0,0,0,0.1);
}

.directory a::before {
    content: "";
    color: #2a6496;
    position: absolute;
    left: -25px;
    opacity: 0;
    transition: opacity 0.3s;
}

.directory a:hover::before {
    opacity: 1;
}

.directory h2 {
    font-size: 24px;
    color: #1a73e8;
    padding-bottom: 15px;
    border-bottom: 2px solid #2a6496;
    margin-bottom: 20px;
}
    .step {
      background-color: #fff;
      padding: 1em;
      border-radius: 8px;
      box-shadow: 0 2px 4px rgba(0,0,0,0.05);
      margin-bottom: 2em;
    }
    .images {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 1em;
    }
    .images img {
      width: 155px;
      height:346px;
      cursor:pointer;
      border-radius: 6px;
    }
    .note {
      background-color: #fff8e1;
      padding: 0.8em;
      margin-top: 1em;
      border-left: 5px solid #ffc107;
      font-size: 0.95em;
    }
    .faq {
      background-color: #eef7ff;
      padding: 1em;
      margin-top: 3em;
      border-left: 4px solid #1a73e8;
    }
    footer {
      margin-top: 4em;
      padding-top: 2em;
      border-top: 1px solid #ccc;
      font-size: 0.9em;
      color: #666;
    }
  </style>