引导手风琴嵌套网格

Question

我一直在试图弄清楚为什么行彼此如此接近，它应该在每一行的底部有边距/填充。

看到"受影响的区域"，其余的行堆叠在下面，没有空格，除非我放
。如果我把它们从手风琴上移除它的正确呈现意味着中间有间距。还有，当你把鼠标悬停在侧边菜单上时，你知道如何使页面变得平滑吗?它看起来又慢又口吃。

http://markestrada.co.uk/cm/ticket/test.php

 <div class="col-md-3"> <!-- Area affected block -->
                <div class="row">
                    <div class="col-md-12">
                        <div class="panel panel panel-default">
                            <div class="panel-heading">Area Affected</div>
                            <div class="panel-body">
                                backend login is not working 
                           </div>
                        </div>
                    </div>
                </div><br>
                <div class="row">           
                    <div class="col-md-12">
                        <div class="panel panel panel-default">
                            <div class="panel-heading">Step to replicate issue</div>
                            <div class="panel-body">
                                go to wp-admin
                           </div>
                        </div>
                    </div>
                </div> <br>
                <div class="row">          
                    <div class="col-md-12">
                        <div class="panel panel panel-default">
                            <div class="panel-heading">Urls</div>
                            <div class="panel-body">
                                <a href="#">Ticket live link</a> <br />
                                <a href="#">Internal QA link</a> <br />
                                <a href="#">External QA link</a> <br />
                           </div>
                        </div>
                    </div>
                </div>
            </div> <!-- Area affected block -->

同样的雪佛龙是不工作的，它应该向上和向下当你点击手风琴。https://jsfiddle.net/tjj72mek/

           function toggleChevron(e) {
            $(e.target)
                .prev('.panel-heading')
                .find('i.indicator')
                .toggleClass('glyphicon-chevron-down glyphicon-chevron-up');
        }
        $('#accordion').on('hidden.bs.collapse', toggleChevron);
        $('#accordion').on('shown.bs.collapse', toggleChevron); 

Answer 1

<div class="col-md-3"> <!-- Area affected block -->
       <div class="panel panel-default">
           <div class="panel-heading"><a role="button" data-toggle="collapse" data-parent="#accordion" href="#detailscollapseOne" aria-expanded="true" aria-controls="detailscollapseOne">Area Affected</a></div>
           <div class="panel-body">
               backend login is not working 
           </div>
       </div>
       <div class="panel panel-default">
           <div class="panel-heading"><a role="button" data-toggle="collapse" data-parent="#accordion" href="#detailscollapseOne" aria-expanded="true" aria-controls="detailscollapseOne">Step to replicate issue</a></div>
           <div class="panel-body">
               go to wp-admin
           </div>
       </div>
       <div class="panel panel-default">
           <div class="panel-heading"><a role="button" data-toggle="collapse" data-parent="#accordion" href="#detailscollapseOne" aria-expanded="true" aria-controls="detailscollapseOne">Urls</a></div>
           <div class="panel-body">
               <a href="#">Ticket live link</a> <br>
               <a href="#">Internal QA link</a> <br>
               <a href="#">External QA link</a> <br>
           </div>
      </div>