body {
      font-family: "Helvetica Neue", sans-serif;
      margin: 0;
      padding: 0;
      background-color: #f9f9f9;
      line-height: 1.6;
      color: #333;
    }

    .container {
      max-width: 1000px;
      margin: 20px auto;
      padding: 20px;
      background: #fff;
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
      border-radius: 8px;
    }

    .top-section {
      display: flex;
      gap: 30px;
    }

    .product-image img {
      width: 300px;
      height: 250px;
      border: 1px solid #ddd;
      border-radius: 4px;
    }

    .product-info {
      flex: 1;
    }

    .product-header h1 {
      font-size: 28px;
      margin-bottom: 10px;
    }

    .product-meta {
      color: #555;
      font-size: 14px;
      margin-bottom: 20px;
    }

    .product-price {
      font-size: 24px;
      color: #d32f2f;
      margin-bottom: 10px;
    }

    .stock {
      color: #388e3c;
      font-size: 14px;
    }

    .buy-section {
      margin-top: 20px;
    }

    .buy-section input {
      width: 80px;
      padding: 8px;
      margin-right: 10px;
    }

    .buy-section button {
      padding: 10px 20px;
      background-color: #1976d2;
      color: white;
      border: none;
      border-radius: 4px;
      cursor: pointer;
    }

    .buy-section button:hover {
      background-color: #1565c0;
    }

    .tabs {
      margin-top: 40px;
    }

    .tab-buttons {
      display: flex;
      border-bottom: 2px solid #ddd;
      margin-bottom: 20px;
    }

    .tab-buttons button {
      background: none;
      border: none;
      padding: 10px 20px;
      cursor: pointer;
      font-size: 16px;
    }

    .tab-buttons button.active {
      border-bottom: 2px solid #1976d2;
      color: #1976d2;
      font-weight: bold;
    }

    .tab-content {
      display: none;
      min-height: 200px; /* 可根据最长内容设定 */
    }

    .tab-content.active {
      display: block;
    }

    table {
      width: 100%;
      border-collapse: collapse;
    }

    table th, table td {
      padding: 12px;
      border-bottom: 1px solid #ddd;
      text-align: left;
    }

    .doc-download {
      margin-top: 20px;
    }

    .doc-download a {
      text-decoration: none;
      padding: 10px 16px;
      background-color: #4caf50;
      color: white;
      border-radius: 4px;
    }

    .doc-download a:hover {
      background-color: #388e3c;
    }

    h3 {
      margin-top: 16px;
      font-size: 16px;
      color: #333;
    }
    ul {
      margin-left: 40px;
    }
    p {
      margin: 6px 0;
    }