.Propagate_look{background-color:#fff;min-height:100%;width:100%;padding-bottom:30px}.Propagate_look h2{font-size:28px;text-align:center;padding-top:30px}.vul li{float:left;width:220px;height:200px;margin-left:24px;margin-top:20px}.vul li img{width:100%}.richText{width:640px;display:block;margin:auto}