.bm_teacher{ margin-top: 30px;}
.bt_sz{ text-align: center; margin-bottom: 25px;}
.bt_sz span{ display: inline-block;font-size: 22px; font-weight: bold;  padding: 0 30px; background: #fff;}
.bm_teacher li{ margin: 10px 2%; width: 46%; border: 1px solid #ddd; padding: 15px; position: relative; float: left;}
.bm_teacher li a{ display: block;}
.bm_teacher li .pic_bm{ width: 30%; float: left;margin-right: 20px;}
.bm_teacher li .pic_bm span{display: block;overflow: hidden;position: relative;padding-top: 119%;}
.bm_teacher li .pic_bm span img{max-height: 160px;object-fit: contain;position: absolute;top: 0;left: 0;width: 100%;height: 100%;-webkit-transition: all .5s;transition: all .5s;}
.bm_teacher li .jsxx{ overflow: hidden;}
.bm_teacher li .jsxx h3{ font-size: 18px; font-weight: bold; margin-bottom: 10px; margin-top: 10px;}
.bm_teacher li .jsxx h3 span{ font-size: 16px;margin-left: 20px; font-weight: normal;}
.bm_teacher li .jsxx p{ line-height:26px; margin-top: 5px; color: #6b6b6b;}
.bm_teacher li:hover .jsxx h3{color: #193065;}
@media only screen and (min-width:1199px){
.bm_teacher li {
    height: 190px;}
}
@media only screen and (max-width:1199px){
.bm_teacher li {
    min-height: 180px;}
}
@media only screen and (max-width:1720px){
.bm_teacher li .jsxx h3 {
    font-size: 16px;}}

@media only screen and (max-width:768px){
    .bm_teacher li{ width:98%;}
}