.wapbgv{ background:url(https://www.gtcom.com.cn/data/metadatas/11/15227/1570520319.jpg) no-repeat center; background-size:cover; position: absolute;top: 0; left: 0;width: 100%;height: 100%; display:none;}
@media screen and (max-width:470px){
 
.wapbgv{  display:block;} 
 
} 
.solve_case_con .list{
	height: auto;
}
.section1 .main_con ul:nth-child(2){margin: 0 130px; } 
@media screen and (max-width:1750px) {
 .section1 .main_con ul:nth-child(2){margin: 0 120px; } 

 
}
@media screen and (max-width:1160px){
     .section1 .main_con ul:nth-child(2){margin: 0 } 

}
.business_hx.small{display: none;}
.about_contact{margin-top: 40px;}
.aboutbox2 .ce2 li{width:20%;}