<div class="container">
  <h1>大拍賣購買流程</h1>
  <div class="form-row">
    <div class="col-md-4">
      <div class="alert alert-primary border-rounded" role="alert">
        A simple primary alert—check it out!
      </div>
    </div>
    <div class="col-md-4">
      <div class="alert alert-danger border-rounded" role="alert">
        A simple primary alert—check it out!
      </div>
    </div>
    <div class="col-md-4">
      <div class="alert alert-warning border-rounded" role="alert">
        A simple primary alert—check it out!
      </div>
    </div>
  </div>
</div>