@media (min-width:960px) and (max-width:1920px) {
.case_banner_mian .case_banner_btn{display:none;}
}

@media (min-width:320px) and (max-width:640px) {
.case_banner_mian .case_banner_btn{display:none;}
}


@media(max-width:1920px){}
@media(max-width:1680px){

}

@media(max-width:1366px){
.i1 .swiper1 .swiper-slide .item { height: 640px !important;min-height: 640px !important;}
.i1 .swiper1 .swiper-slide .item {height: 640px !important;min-height: 640px !important;}

  .case_banner_mian .case_banner_txt1{font-size: 60px;margin-bottom: 36px;}


}

@media(max-width:768px){
.i1 .swiper1 .swiper-slide .item {height: 480px !important;min-height: 300px !important;}
.i1 .swiper1 .swiper-slide .item {height: 480px !important;min-height: 300px !important;}
	
.case_banner_mian .case_banner_txt1{font-size: 28px;margin-bottom: 20px;}
.case_banner_mian .case_banner_btn{width:200px;height:auto;overflow:hidden;color:#FF0;text-align:center;  background: rgba(204, 40, 40, 0.9);padding:12px 0; border-radius:50px;}
.case_banner_mian .case_banner_btn a{color: #fff;font-size:32px;}
.btn_ys{color:#fff;}
  .case_banner_mian{top: 50%;}
}


@media(max-width:640px)
{	
.i1 .swiper1 .swiper-slide .item {height: 210px !important;min-height: 210px !important;}
.i1 .swiper1 .swiper-slide .item {height: 210px !important;min-height: 210px !important;}
}

@media(max-width:320px){

}
/* widdd */