Bootstrap 3网格：一行内的列下的列

Question

我有以下HTML代码：

<div class="row">
<div class="col-lg-3">
 <div class="panel panel-default">
  <div class="panel-body">
    Panel 1 (left)
    </div>
  </div>
</div> 

<div class="col-lg-6">
 <div class="panel panel-default">
  <div class="panel-body">
    Panel 2 (center)
    </div>
   </div>
 </div>
</div>

<div class="col-lg-3">
 <div class="panel panel-default">
  <div class="panel-body">
    Panel 3 (right)
    </div>
   </div>
 </div>
</div>

</div>

<div class="row">
<div class="col-lg-3">
 <div class="panel panel-default">
  <div class="panel-body">
    Panel 2-2 (under panel 2)
    </div>
  </div>
</div>
</div> 

最终结果应如下所示：
它有效，但如果面板3的高度比面板1或2高，我得到这个：

我该如何解决？

Answer 1

这就是你应该如何做到这一点，将Panel 2-2嵌套在Panel 2下，而不是让它位于最后，这不是你想要的。这是Bootply：http://bootply.com/102721

<强>代码

<div class="row">
    <div class="col-lg-3">
        <div class="panel panel-default">
            <div class="panel-body">Panel 1 (left)</div>
        </div>
    </div>
    <div class="col-lg-6">
        <div class="panel panel-default">
            <div class="panel-body">Panel 2 (center)</div>
        </div>
        <div class="col-lg-3">
            <div class="panel panel-default">
                <div class="panel-body">Panel 2-2 (under panel 2)</div>
            </div>
        </div>
    </div>
    <div class="col-lg-3">
        <div class="panel panel-default">
            <div class="panel-body">Panel 3 (right)
                <br>Panel 3 (right)
                <br>Panel 3 (right)
                <br>Panel 3 (right)
                <br>Panel 3 (right)
                <br>Panel 3 (right)
                <br>Panel 3 (right)
                <br>Panel 3 (right)
                <br>Panel 3 (right)
                <br>Panel 3 (right)
                <br>Panel 3 (right)
                <br>
            </div>
        </div>
    </div>
</div>

<强>演示