/* 全屏遮罩 */
.modal-mask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
  }
 
  /* 对话框容器 */
  .modal-dialog {
    width: 300px;
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
 
  /* 对话框标题 */
  .modal-title {
    margin: 0;
    font-size: 1.2em;
    font-weight: bold;
  }
 
  /* 对话框内容 */
  .modal-content {
    margin: 20px 0;
    font-size: 1em;
  }

  .modal-foot {
    display:flex;
    flex-direction: row;
    align-self: flex-end;
  }
 
  /* 对话框关闭按钮 */
  .modal-close-btn {
    cursor: pointer;
    align-self: flex-end;
  }