body {
      font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      max-width: 800px;
      margin: 30px auto;
      padding: 20px;
      background: linear-gradient(135deg, #e3f2fd, #bbdefb); /* 柔和天蓝色渐变 */
      color: #333;
    }
    h1 {
      text-align: center;
      color: #0288d1;
      margin-bottom: 30px;
      font-size: 28px;
    }
    .title{
    text-align: center;
     color: #64748b; 
     margin-top: -15px;  
    }
    .form-group {
      margin-bottom: 20px;
    }
    label {
      display: block;
      margin-bottom: 6px;
      font-weight: bold;
      color: #01579b;
    }
    label a{
      color: #113ee9;
    }
    input, select, button {
      width: 100%;
      padding: 12px;
      font-size: 16px;
      border: 1px solid #90caf9;
      border-radius: 8px;
      box-sizing: border-box;
      background-color: white;
    }
    #content,#text,#text1,#text2 {
      width: 100%;
      padding: 12px;
      font-size: 16px;
      line-height: 1.5;
      border: 1px solid #ccc;
      border-radius: 6px;
      background-color: #fff;
      resize: vertical; /* 允许垂直拖拽调整高度 */
      box-sizing: border-box; /* 确保 padding 不影响 width */
      font-family: "Microsoft YaHei", sans-serif;
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }
  .radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 8px;
  }
  .radio-option {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    font-size: 15px;
    color: #34495e;
    padding: 6px 12px;
    border-radius: 6px;
    background: #f8f9fa;
    transition: all 0.2s ease;
    user-select: none;
  }

  .radio-option:hover {
    background: #eef2f7;
  }

  .radio-option input[type="radio"] {
    margin-right: 8px;
    transform: scale(1.1);
    cursor: pointer;
  }

  .radio-option input[type="radio"]:focus {
    outline: 2px solid #3498db;
    outline-offset: 2px;
  }
    #content:focus, #text:focus, #text1:focus, #text2:focus{
      outline: none;
      border-color: #4a90e2;
      box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
    }
    button {
      background: #0288d1;
      color: white;
      font-weight: bold;
      cursor: pointer;
      transition: background 0.3s;
    }
    button:hover {
      background: #0277bd;
    }
    #result {
      margin-top: 25px;
      padding: 20px;
      background: white;
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.08);
      display: none;
      line-height: 1.6;
      border: 1px solid #bbdefb;
    }
    .error {
      color: #d32f2f;
      font-weight: bold;
    }
    footer {
      text-align: center;
      margin-top: 30px;
      color: #13516e;
      font-size: 14px;
    }
    footer a {
      color: #036493;
      text-decoration: none;
      font-weight: 600;
    }
    .highlight {
      background-color: #e8f5e9;
      padding: 4px 8px;
      border-radius: 4px;
      font-weight: bold;
    }