.w1300{width: 1300px;}

/*头部*/
.sub-nav-in{width:1300px;margin: 0 auto;}
.sub-nav-img img{width:300px;height:200px;}
/*内页导航*/
.m-class1cat-wrap{position:absolute;top:0;left:-120px;width:120px;}
.m-classlist-wrap{width:100%;}