.about_ban{position: relative;z-index: 50;overflow: hidden;}
.about_ban img{display: block;width: 100%;z-index: 50;}
.about_head{color: #FFFFFF; position: absolute;z-index: 100;left: 50%;top: 40%;transform: translate(-50%,-50%);}
.about_head h2{font-family: "PingFangSCMedium";}
.about_head p{font-family: "PingFangSCMedium";}
@media only screen and (max-width: 500px) {
	.about_ban{height: 200px;}
	.about_ban img{height: 100%;width: auto;}
	.about_head h2{font-size: 24px;}
}
/*关于我们*/
.concer_box{padding: 70px 0 110px;background: url(../images/aboutbj.jpg)no-repeat center center/cover;}
.concer_warp{width: 80%;margin: auto;}
.concer_top em{margin-left: 25px;background-image: -webkit-gradient(linear, left 0, right 0, from(#02215f), to(#1758cb));-webkit-background-clip: text;-webkit-text-fill-color: transparent;font-family: arial;}
.concer_head p{color: #646464;margin-top: 15px;} 
.concer_use{margin-top: 75px;padding-top: 50px;box-sizing: border-box;border-top: 1px solid #e3e3e3;}
.concer_left{width:39%;float: left;}
.concer_rig{width: 55.8%;color: #666666;float: right;line-height: 34px;}
.concer_tit{color: #257af3;font-weight: bold;}
.concer_tex {line-height: 36px;color: #333333;margin-top: 30px;}
.concer_rig p+p{margin-top: 15px;}
@media only screen and (max-width:1680px ) {
	.concer_box{ padding: 60px 0 80px;}
	.concer_use{margin-top: 55px;padding-top: 40px;}
}
@media only screen and (max-width:1440px ) {
	.concer_left{width: 42%;}
	.concer_rig {width: 55%;line-height: 32px;}
	.concer_tex{line-height: 34px;}
	.concer_warp{width: 85%;}
}
@media only screen and (max-width:1336px ) {
	.concer_box{ padding: 50px 0 60px;}
	.concer_use{margin-top: 45px;padding-top: 30px;}
	.concer_warp{width: 90%;}
}
@media only screen and (max-width:1280px ) {
	.concer_box{ padding: 40px 0 50px;}
	.concer_use{margin-top: 35px;padding-top: 20px;}
}
@media only screen and (max-width:1024px ) {
	.concer_box{ padding: 30px 0 40px;}
}
@media only screen and (max-width:768px ) {
	.concer_cont{padding: 30px 20px; float: left; width: 100%;right: 0;top: 0;position: relative;height: auto;}
    .concer_use{margin-top: 25px;}
    .concer_left{width: 100%;}
	.concer_rig {width: 100%;line-height: 28px;margin-top: 20px;}
	.concer_tex{line-height: 30px;}
}
/*history*/
.his_top{padding: 100px 0 170px;position: relative;z-index: 50; color: #FFFFFF; text-align: center; background: url(../images/hisbg.jpg)no-repeat center center/cover;}
.his_top h2{font-weight: bold;font-family: arial;}
.his_use{position: relative;z-index: 100; padding-bottom: 120px; background: url(../images/hisbg2.jpg)no-repeat center 100px/cover;}
.his_list{position: relative;width: 1100px;margin: auto;margin-top: -100px; color: #666666; padding-top: 180px;padding-bottom: 68px; box-sizing: border-box;position: relative;}
.his_list ul{position: relative;z-index: 100;}
.his_list li+li{margin-top: 15px;}
.his_list li .his_item{transition: all .3s ease-in; float: right;width: 50%;padding-left: 70px;}
.his_list li .his_item:hover{color: #007AFF;}
.his_list li:nth-of-type(even) .his_item{text-align: right; float: left;padding-left: 0;padding-right: 70px;}
.his_list:after{z-index: 80; display: block;content: "";position: absolute;left: 50%;top: 0;transform: translateX(-50%); width: 1px;height: 100%;background: #abacb6;}
.his_list:before{z-index: 90; display: block;content: "";position: absolute;left: 50%;top:0;transform: translateX(-50%); width: 25px;height: 25px;border-radius: 50%; background: #FFFFFF;border: 12px solid #77adf7;}
.his_info{margin-top: 10px;}
.his_year{position: relative;font-family: "PingFangSCMedium";}
.his_year:after{position: absolute; display: block;content: "";width: 15px;height: 15px; background:#257af3;border-radius: 50%; left: -77px;top: 50%;transform: translateY(-50%);}
.his_list li:nth-of-type(even) .his_year:after{right: -77px;left: inherit;}
@media only screen and (max-width:1680px ) {
	.his_top{padding: 80px 0 150px;}
	.his_list{padding-top: 150px;padding-bottom: 58px;}
	.his_use{padding-bottom: 90px;}
}
@media only screen and (max-width:1336px ) {
	.his_top{padding: 70px 0 120px;}
	.his_list{padding-top: 120px;padding-bottom: 48px;margin-top: -80px;}
	.his_use{padding-bottom: 90px;background-position-y: 80px;}
	.his_list:before{width: 20px;height: 20px;border-width: 8px;}
	.his_list li .his_item{padding-left: 50px;}
	.his_list li:nth-of-type(even) .his_item{padding-right: 50px;}
	.his_year:after{width: 12px;height: 12px;left: -56px;}
	.his_list li:nth-of-type(even) .his_year:after{right: -56px;}
	
}
@media only screen and (max-width:1280px ) {
	.his_top{padding: 50px 0 90px;}
	.his_list{margin-top: -65px;width: 90%;}
	.his_use {padding-bottom: 80px;background-position-y: 65px;}
	.his_info{margin-top: 5px;}
}
@media only screen and (max-width:500px ) {
	.his_info{height: auto !important;}
	.his_list{padding-top: 90px;padding-bottom: 38px;margin-top: -55px;}
    .his_list:before {width: 15px;height: 15px;border-width: 6px;}
    .his_use {padding-bottom: 60px;background-position-y: 55px;}
    .his_list li .his_item {padding-left: 35px;}
    .his_list li:nth-of-type(even) .his_item {padding-right: 35px;}
    .his_list li:nth-of-type(even) .his_year:after{right: -41px;}
    .his_year:after{left: -41px;}
}