*{margin: 0;padding: 0;}
ul,li{list-style: none}
a{text-decoration: none;color: #333333;}
.container{width: 1340px;margin: 0 auto;padding: 30px 50px;box-sizing: border-box;}
.xwfb_list li{width: 31%;margin: 0 3.5% 3.5% 0;float: left;}
.xwfb_list li:nth-child(3n){margin-right: 0;}
.xwfb_list li img{display:block;width: 100%;height: 200px;}
.xwfb_list li .xwfb_theme{
    position: relative;
    border: 1px solid #e1e1e1;
    border-top: none;
    padding: 15px 20px;
    box-sizing: border-box;
    height: 73px;
}
.xwfb_list li .xwfb_theme:after{
    content: "";
    display: block;
    width: 2px;
    height: 25px;
    background-color: blue;
    position: absolute;
    left: -1px;
    top: 16px;
}
@media (max-width: 750px) and (min-width: 320px){
    .container{width: 100%;padding: 10px;}
    .xwfb_list li{width: 100%;margin-top: 30px;}
}