这是一款bootstrap垂直手风琴菜单效果。该bootstrap垂直手风琴菜单效果利用CSS 伪元素来制作一些漂亮的装饰效果，使原生的bootstrap手风琴更加漂亮。

使用方法

在页面中引入bootstrap相关文件，以及jquery和fontawesome.min.css文件。

HTML结构

该bootstrap垂直手风琴菜单效果的HTML结构如下：

    

        

            

                

                    

                        

                            
                                Section 1
                            
                        
                    
                    

                        

                            
Lorem ipsum dolor sit amet, ...
                        
                    
                
                

                    

                        

                            
                                Section 2
                            
                        
                    
                    

                        

                            
Lorem ipsum dolor sit amet, ...
                        
                    
                
                

                    

                        

                            
                                Section 3
                            
                        
                    
                    

                        

                            
Lorem ipsum dolor sit amet,...
                        
                    
                
            
        

                

CSS样式

然后为该bootstrap垂直手风琴添加下面的CSS代理来进行效果美化。

a:hover,a:focus{
    text-decoration: none;
    outline: none;
}
#accordion .panel{
    border: none;
    border-radius: 0;
    box-shadow: none;
    margin: 0 30px 10px 30px;
    overflow: hidden;
    position: relative;
}
#accordion .panel-heading{
    padding: 0;
    border: none;
    border-radius: 0;
    position: relative;
}
#accordion .panel-title a{
    display: block;
    padding: 15px 20px;
    margin: 0;
    background: #fe7725;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #fff;
    border-radius: 0;
    position: relative;
}
#accordion .panel-title a.collapsed{ 
  background: #1c2336;}
#accordion .panel-title a:before,
#accordion .panel-title a.collapsed:before{
    content: "\f068";
    font-family: fontawesome;
    width: 30px;
    height: 30px;
    line-height: 25px;
    border-radius: 50%;
    background: #fe7725;
    font-size: 14px;
    font-weight: normal;
    color: #fff;
    text-align: center;
    border: 3px solid #fff;
    position: absolute;
    top: 10px;
    right: 14px;
}
#accordion .panel-title a.collapsed:before{
    content: "\f067";
    background: #ababab;
    border: 4px solid #626262;
}
#accordion .panel-title a:after,
#accordion .panel-title a.collapsed:after{
    content: "";
    width: 17px;
    height: 7px;
    background: #fff;
    position: absolute;
    top: 22px;
    right: 0;
}
#accordion .panel-title a.collapsed:after{
    width: 19px;
    background: #ababab;
}
#accordion .panel-body{
    border-left: 3px solid #fe7725;
    border-top: none;
    background: #fff;
    font-size: 15px;
    color: #1c2336;
    line-height: 27px;
    position: relative;
}
#accordion .panel-body:before{
    content: "";
    height: 3px;
    width: 50%;
    background: #fe7725;
    position: absolute;
    bottom: 0;
    left: 0;
}