.header{position: relative !important;height: 100px!important;}
.box{width: 80%;margin: 0 auto;margin-top: 120px;}
.header-ph-all{display:none}
.nav .nav-left img,.search_ph > a > img{opacity: 0;}
@media screen and (max-width:1024px){
 .header-ph-all{display:block}
 .nav .nav-left img,.search_ph > a > img{opacity: 1;}
}