.zst{
 width: 100%;
 height: 500px;
 
 margin-top: 170px;
}
.zst img{
 display: block;
 height: 100%;
 width: 100%;
}

.list{
 width: 1200px;
 height: 637px;
 margin: 0 auto;
 margin-top: 30px;
 
}
.list_left img{
 display: block;
 
 height: 100%;
}
.list_left{
 float: left;
 width: 300px;
 height: 607px;
 
 overflow: hidden;
}
.list_right{
 float: right;
 width: 870px;
 height: 607px;
}
.list_titel{
 line-height: 50px;
 float: left;
 width: 300px;
 height: 50px;
}
.list_right .weizhi{
 float: right;
 line-height: 50px;
 width: 300px;
 height: 50px;
}
.list_right_list{
 
 height: 550px;
 margin-top: 50px;
}