<div class="row" style="margin-top:30px;">
<div class="col-md-6" style="border-right:1px solid #ddd;">
<div class="well col-md-10">
<h3>用戶登錄</h3>
<div class="input-group input-group-md">
<span class="input-group-addon" id="sizing-addon1"><i class="glyphicon glyphicon-user" aria-hidden="true"></i></span>
<input type="text" class="form-control" placeholder="用戶名" aria-describedby="sizing-addon1">
</div>
<div class="input-group input-group-md">
<span class="input-group-addon" id="sizing-addon1"><i class="glyphicon glyphicon-lock"></i></span>
<input type="password" class="form-control" placeholder="密碼" aria-describedby="sizing-addon1">
</div>
<div class="well well-sm" style="text-align:center;">
<input type="radio" name="kind" value="tea"> 老師
<input type="radio" name="kind" value="stu"> 學生
</div>
<button type="submit" class="btn btn-success btn-block">
登錄
</button>
</div>
</div>
<div class="col-md-6">
<h3>
歡迎使用學生作業(yè)管理系統(tǒng)
</h3>
<ul>
<li>學生使用<em>學號</em>登錄，初始密碼為<em>6個1</em>，登錄后請及時修改密碼</li>
<li>老師請使用<em>工號</em>登錄，初始密碼為<em>6個1</em>，登錄后請及時修改密碼</li>
</ul>
</div>
</div>

.input-group{
margin:10px 0px;//輸入框上下外邊距為10px,左右為0px
}
h3{
padding:5px;
border-bottom:1px solid #ddd;//h3字體下邊框
}
li{
list-style-type:square;//列表項圖標為小正方形
margin:10px 0;//上下外邊距是10px
}
em{//強調(diào)的樣式
color:#c7254e;
font-style: inherit;
background-color: #f9f2f4;
}