使用BootStrap实现用户登录界面UI

<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>用户登录</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="用户名" 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="密码" aria-describedby="sizing-addon1"></div><div class="well well-sm" style="text-align:center;"><input type="radio" name="kind" value="tea"> 老师<input type="radio" name="kind" value="stu"> 学生</div><button type="submit" class="btn btn-success btn-block">登录</button></div></div><div class="col-md-6"><h3>欢迎使用学生作业管理系统</h3><ul><li>学生使用<em>学号</em>登录，初始密码为<em>6个1</em>，登录后请及时修改密码</li><li>老师请使用<em>工号</em>登录，初始密码为<em>6个1</em>，登录后请及时修改密码</li></ul></div></div>

.input-group{margin:10px 0px;//输入框上下外边距为10px,左右为0px}h3{padding:5px;border-bottom:1px solid #ddd;//h3字体下边框}li{list-style-type:square;//列表项图标为小正方形margin:10px 0;//上下外边距是10px}em{//强调的样式color:#c7254e;font-style: inherit;background-color: #f9f2f4;}