.click-yinghua {
    color: #00fff0;
    text-decoration: underline;
    cursor: pointer;
}
.click-yinghua:active {
    color: darkblue;
}
.greens {
    color: #00fff0;
}
.titles {
    color: #000;
}
/* 定义隐藏类 */
  .hidden {
    display: none;
  }
  /* 按钮样式 */
  button {
    padding: 8px 16px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
  }
  button:hover {
    background: #218838;
  }
  /* 要显示的内容区样式 */
  .content-showhidden {
    margin-top: 20px;
    border: 1px solid #ccc;
    padding: 12px;
    border-radius: 8px;
    background: #f9f9f9;
  }