*{ margin:0px; padding:0px;}
body 
{
    line-height:1.5;
    font-family:微软雅黑;
}
a{ text-decoration:none;}
ul,li{ list-style:none; }

.tabs-list{ max-width:900px; margin:40px auto; }
.tabs-list .tab { padding:0 40px; line-height:70px; position:relative; border-bottom:1px #ededed solid; cursor:pointer; display:flex; justify-content: space-between; align-items: center;}
.tabs-list .tab span { font-size:16px;} 
.tabs-list .tab span.arrow{ width:30px; height:30px; position:relative; border:1px #000000 solid; }
.tabs-list .tab span.arrow:before{ content:''; background:#000000; width:20px; height:2px; position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);}
.tabs-list .tab span.arrow:after{ content:''; background:#000000; width:2px; height:20px; position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);}
.tabs-list .tab.tab-act span.arrow:after{ display:none;}
.tabs-list .tabcon { background:#ededed; display:none; line-height:30px; font-size:12px; padding:30px;}