我已经使用这个 SO question的答案（有更多投票）中给出的自定义 CSS 创建了堆叠选项卡。选项卡工作正常，但我无法添加两行，顶行有两个文本输入，底行有一个按钮。使用我的 CSS 代码，第二行位于选项卡面板之外。我怎样才能解决这个问题？
HTML 代码
<div class="container">
<div class="row">
<div class="col-lg-12">
<h3>
Tabs -left</h3>
<div class="tabbable tabs-left">
<ul class="nav nav-tabs">
<li><a href="#a" data-toggle="tab">One</a></li>
<li><a href="#b" data-toggle="tab">Two</a></li>
<li><a href="#c" data-toggle="tab">Twee</a></li>
</ul>
<div class="tab-content">
<div class="tab-pane active" id="a">
<div class="row">
<div class="col-md-4">
<input type="text" class="form-control input-sm" placeholder="Small">
</div>
<div class="col-md-4">
<input type="text" class="form-control input-sm" placeholder="Small">
</div>
</div>
<div class="row">
<div class="col-md-4">
<button class="btn">
Large</button>
</div>
</div>
</div>
<div class="tab-pane" id="b">
Tab Two
</div>
<div class="tab-pane" id="c">
Tab Three
</div>
</div>
</div>
</div>
</div>
</div>
自定义 CSS（来自 SO 问题）
.tabs-below > .nav-tabs,
.tabs-right > .nav-tabs,
.tabs-left > .nav-tabs {
border-bottom: 0;
}
.tab-content > .tab-pane,
.pill-content > .pill-pane {
display: none;
}
.tab-content > .active,
.pill-content > .active {
display: block;
}
.tabs-below > .nav-tabs {
border-top: 1px solid #ddd;
}
.tabs-below > .nav-tabs > li {
margin-top: -1px;
margin-bottom: 0;
}
.tabs-below > .nav-tabs > li > a {
-webkit-border-radius: 0 0 4px 4px;
-moz-border-radius: 0 0 4px 4px;
border-radius: 0 0 4px 4px;
}
.tabs-below > .nav-tabs > li > a:hover,
.tabs-below > .nav-tabs > li > a:focus {
border-top-color: #ddd;
border-bottom-color: transparent;
}
.tabs-below > .nav-tabs > .active > a,
.tabs-below > .nav-tabs > .active > a:hover,
.tabs-below > .nav-tabs > .active > a:focus {
border-color: transparent #ddd #ddd #ddd;
}
.tabs-left > .nav-tabs > li,
.tabs-right > .nav-tabs > li {
float: none;
}
.tabs-left > .nav-tabs > li > a,
.tabs-right > .nav-tabs > li > a {
min-width: 74px;
margin-right: 0;
margin-bottom: 3px;
}
.tabs-left > .nav-tabs {
float: left;
margin-right: 19px;
border-right: 1px solid #ddd;
}
.tabs-left > .nav-tabs > li > a {
margin-right: -1px;
-webkit-border-radius: 4px 0 0 4px;
-moz-border-radius: 4px 0 0 4px;
border-radius: 4px 0 0 4px;
}
.tabs-left > .nav-tabs > li > a:hover,
.tabs-left > .nav-tabs > li > a:focus {
border-color: #eeeeee #dddddd #eeeeee #eeeeee;
}
.tabs-left > .nav-tabs .active > a,
.tabs-left > .nav-tabs .active > a:hover,
.tabs-left > .nav-tabs .active > a:focus {
border-color: #ddd transparent #ddd #ddd;
*border-right-color: #ffffff;
}
.tabs-right > .nav-tabs {
float: right;
margin-left: 19px;
border-left: 1px solid #ddd;
}
.tabs-right > .nav-tabs > li > a {
margin-left: -1px;
-webkit-border-radius: 0 4px 4px 0;
-moz-border-radius: 0 4px 4px 0;
border-radius: 0 4px 4px 0;
}
.tabs-right > .nav-tabs > li > a:hover,
.tabs-right > .nav-tabs > li > a:focus {
border-color: #eeeeee #eeeeee #eeeeee #dddddd;
}
.tabs-right > .nav-tabs .active > a,
.tabs-right > .nav-tabs .active > a:hover,
.tabs-right > .nav-tabs .active > a:focus {
border-color: #ddd #ddd #ddd transparent;
*border-left-color: #ffffff;
}