这是一款基于Bootstrap的垂直手风琴特效。该手风琴特效基于Bootstrap Accordion组件来制作，通过自定义CSS样式，生成美观大方的垂直手风琴效果。

使用方法

在页面中引入jquery,Bootstrap的相关文件，以及FontAwesome字体图标文件。

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="js/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
HTML结构

该手风琴效果的基本HTML结构如下：

<div class="container">
    <div class="row">
        <div class="col-md-6">
            <div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true">
                <div class="panel panel-default">
                    <div class="panel-heading" role="tab" id="headingOne">
                        <h4 class="panel-title">
                            <a class="" role="button" data-toggle="collapse" 
                                data-parent="#accordion" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
                                Section 1
                            </a>
                        </h4>
                    </div>
                    <div id="collapseOne" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOne">
                        <div class="panel-body">
                            ......
                        </div>
                    </div>
                </div>
                <div class="panel panel-default">
                    <div class="panel-heading" role="tab" id="headingTwo">
                        <h4 class="panel-title">
                            <a class="collapsed" role="button" data-toggle="collapse" 
                                data-parent="#accordion" href="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
                                Section 2
                            </a>
                        </h4>
                    </div>
                    <div id="collapseTwo" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingTwo">
                        <div class="panel-body">
                            ......
                        </div>
                    </div>
                </div>
                <div class="panel panel-default">
                    <div class="panel-heading" role="tab" id="headingThree">
                        <h4 class="panel-title">
                            <a class="collapsed" role="button" data-toggle="collapse" 
                                data-parent="#accordion" href="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
                                Section 3
                            </a>
                        </h4>
                    </div>
                    <div id="collapseThree" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingThree">
                        <div class="panel-body">
                           ......
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
CSS样式

实现该手风琴效果的CSS样式也非常简单：通过简单的边框修饰和FontAwesome字体图标来美化手风琴。

a:hover, a:focus{
    outline: none;
    text-decoration: none;
}
#accordion .panel{
    box-shadow: none;
    border: none;
    border-radius:0;
    margin-bottom: 6px;
    border-left:5px solid #944f95;
}
#accordion .panel-heading{
    padding:0;
    background-color:#fff;
}
#accordion .panel-title a{
    display: block;
    color: #333;
    font-size: 15px;
    font-weight: bold;
    padding: 14px 40px;
    background: #f5f5f5;
    text-transform: uppercase;
    border-bottom: 1px solid #d3d3d3;
    position: relative;
}
#accordion .panel-title a.collapsed{
    border-top: 0;
    color: #333;
    background: #eee;
    border-bottom:1px solid transparent;
}
#accordion .panel-title a:before,
#accordion .panel-title a.collapsed:before{
    content: "\f068";
    font-family: FontAwesome;
    position: absolute;
    top: 10px;
    left: 15px;
    font-size: 14px;
    line-height: 24px;
    color: #944f95;
}
#accordion .panel-title a.collapsed:before{
    content: "\f067";
}
#accordion .panel-body{
    color: #666464;
    font-size: 14px;
    line-height: 20px;
    border-top: 0 none;
    background: #eee;
    padding: 15px 27px;
}