   <div class="modal-content">
      <div class="modal-header">
        <h1 class="modal-title fs-5" id="staticBackdropLabel">提示</h1>
        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
      </div>
      <div class="modal-body">
         文件太大了，请传4M以下的文件！
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">关闭</button>
         
      </div>
    </div>