这是一款CSS3垂直手风琴Accordion特效。该CSS3 Accordion是对bootstrap Accordion的效果美化。通过简单的CSS3代码来实现炫酷的垂直手风琴效果。

 使用方法

在页面中引入jquery和bootstrap相关文件。

<link href="css/bootstrap.min.css" rel="stylesheet">
<link href="css/font-awesome.min.css" rel="stylesheet">
<script src="js/jquery.min.js"></script>
<script src="js/bootstrap.min.js"></script>

 HTML结构

该CSS3垂直手风琴的HTML结构如下：

<div class="container">
      <div class="row">
          <div class="col-md-offset-3 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 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">
                              <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.  </p>
                          </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">
                              <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. </p>
                          </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">
                              <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. </p>
                          </div>
                      </div>
                  </div>
              </div>
          </div>
      </div>
  </div>

 CSS样式

然后通过下面的CSS3代码来对该垂直手风琴进行效果的美化。

a:hover,a:focus{
    text-decoration: none;
    outline: none;
}
#accordion:before{
    content: "";
    width: 1px;
    height: 80%;
    background: #550527;
    position: absolute;
    top: 20px;
    left: 24px;
    bottom: 20px;
}
#accordion .panel{
    border: none;
    border-radius: 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
    margin: 0 0 12px 50px;
    position: relative;
}
#accordion .panel:before{
    content: "";
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, #688e26 0%,#ff816a 100%);
    position: absolute;
    top: 0;
    left: -2px;
}
#accordion .panel-heading{
    padding: 0;
    background: #fff;
    position: relative;
}
#accordion .panel-heading:before{
    content: "";
    width: 15px;
    height: 15px;
    border-radius: 50px;
    background: #fff;
    border: 1px solid #550527;
    position: absolute;
    top: 50%;
    left: -48px;
    transform: translateY(-50%);
}
#accordion .panel-title a{
    display: block;
    padding: 15px 55px 15px 30px;
    font-size: 20px;
    font-weight: 600;
    color: #550527;
    border: none;
    margin: 0;
    position: relative;
}
#accordion .panel-title a:before,
#accordion .panel-title a.collapsed:before{
    content: "\f068";
    font-family: fontawesome;
    width: 25px;
    height: 25px;
    line-height: 25px;
    border-radius: 50%;
    font-size: 15px;
    font-weight: normal;
    color: #688e26;
    text-align: center;
    border: 1px solid #688e26;
    position: absolute;
    top: 50%;
    right: 25px;
    transform: translateY(-50%);
    transition: all 0.5s ease 0s;
}
#accordion .panel-title a.collapsed:before{ content: "\f067"; }
#accordion .panel-body{
    padding: 0 30px 15px;
    border: none;
    font-size: 14px;
    color: #305275;
    line-height: 28px;
}

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