@media (max-width: 1650px) {
    header .content .left{width: 45%;}

}
@media (max-width: 1300px) {
    footer .content {width:65% ;}
}
@media (max-width: 980px) {
    .list_content{display: block}
    .box_list .list{grid-template-columns:1fr ;}
    header .content .left .navs{display: none}
    header .content{height: 60px}
    .box_one .t{font-size: 21px;}
    .box_list .list .top .op_link>a{line-height: 24px;}
    footer .content {width:90%;flex-direction: column}
    footer .right{margin-top: 30px}
    .box_one .right form{display: none}
    header .content .right{display: none}
    header .nav{display: block}
    header .content{padding: 0 20px;box-sizing: border-box}
    .box_list .list .top .op_link{display: none}
}
@media (max-width: 780px) {
    .nav_top{width: 100%;}
}