css - Bootstrap 3 两个响应行彼此相邻？

Question

我正在使用 Bootstrap 3 并尝试解决图像上模拟的问题。我使用了一行和两列，它们彼此相邻，如图所示，但是当我调整大小到移动设备时，我希望右侧落在左侧下方。如有任何帮助，我们将不胜感激，谢谢。

代码示例:

<div className="container">
  <div className="row">
    <div className="col-xs-4 col-offset-xs-1">
     <h1>1</h1>
  </div>
  <div className="col-xs-4">
    <div className="row">
      <h1>2</h1>
    </div>
  </div>

Answer 1

.black{background-color:#000; height:320px;}
.red{background-color:#F00; height:100px;margin-bottom:10px;}

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

<div class="container">
  <div class="row">
    <div class="col-xs-6">
      <div class="row">
        <div class="col-xs-12 black">
          black
        </div>
       </div>
     </div>
    <div class="col-xs-6">
      <div class="row">
        <div class="col-xs-12 red">
          one
        </div>
       </div>
      <div class="row">
        <div class="col-xs-12 red">
          two
        </div>
       </div>
      <div class="row">
        <div class="col-xs-12 red">
          three
        </div>
       </div>
     </div>
    </div>
  </div>