用bootstrap写一个登陆页

    <div class="container">
            <p class="text-center marginTop35">后台管理系统</p>
            <p class="text-center marginTop20">会议管理系统</p>
            <div class="row marginTop20">
                <div class="col-xs-8 col-xs-offset-2 col-sm-6 col-sm-offset-3 col-md-4 col-md-offset-4  border">
                    <div class="row marginTop35">
                        <div class="col padding10">
                            <p class="text-info">请输入您的登录信息</p>
                        </div>
                    </div>
 
                    <div class="row marginTop20">
                        <div class="input-group">
                            <input type="text" class="form-control" placeholder="Recipient's username">
                            <span style="vertical:top;" class="input-group-addon "><i class="glyphicon glyphicon-user"></i></span>
                        </div>
                    </div>
                    <div class="row marginTop20">
                        <div class="input-group">
                            <input type="text" class="form-control" placeholder="登录密码">
                            <span class="input-group-addon "><i class="glyphicon glyphicon-lock"></i></span>
                        </div>
                    </div>
                    <div class="row marginTop20">
                        <div class="col-xs-6">
                            <div class="checkbox">
                                <label class="checkbox-inline">
                                    <input type="checkbox" id="inlineCheckbox2" value="option2"> 管理员方式登录
                                </label>
                            </div>
                        </div>
                        <div class="col-xs-6">
                            <div class="checkbox  text-right text-danger">
                                <label class="checkbox-inline">
                                    <input class="sr-only" type="checkbox" id="inlineCheckbox2" value="option2"> 忘记密码?
                                </label>
                            </div>
                        </div>
                    </div>
                    <div class="row marginTop20">
                        <div class="col-xs-8 col-xs-offset-2 ">
                            <div class="btn btn-info btn-lg btn-block">
                                <i class="glyphicon glyphicon-log-in"></i>
                                登录
                            </div>
                        </div>
                    </div>
                    <div class="row marginTop20">
                        <div class="col-xs-6 padding10">
                            <i class="glyphicon glyphicon-arrow-left"></i>
                            团体注册
                        </div>
                        <div class="col-xs-6 text-right padding10">
                            个人注册
                            <i class="glyphicon glyphicon-arrow-right"></i>
                        </div>
                    </div>
                </div>
 
            </div>
 
        </div>    

如图：