@media screen and (max-width: 1680px){
	.header .nav .nav_li{margin-right: 30px;}
}


@media screen and (max-width: 1600px){
	
	.header .logo{margin-left: -640px;}
	.header .nav .nav_li a {font-size: 14px;}
	.header .nav .nav_li {margin-right: 20px;}
	.section1 .bot{}
	
	
	
}

@media screen and (max-width: 1440px){	
	.section2{padding: 150px 0 120px;}
	.section3{padding: 180px 0 180px;}
	.section3 .top span{font-size: 20px;}
	.section3 .top span.on{font-size: 30px;}
	
}


	
@media screen and (max-width: 1366px){
	.container{width: 1200px;}
	.header .logo{margin-left: -600px;}
	.section1 .title{font-size: 50px;}
	.section2 .pic{height: 435px;}
	.header .nav .nav_li a {font-size: 13px;}
	.header .nav .nav_li {margin-right: 16px;}
	.section1 .bot {}
	.section1 .bot .item{width: 60px;margin-right: calc(20% - 15px);}
	.section1 .bot .item span{font-size: 14px;line-height: 20px;}
	.footer .list{width: 120px;}
	.footer .list.info{width: 330px;}
	
	
	
	
	
	
}

@media screen and (max-width: 1280px){
	.header .logo{margin-left: 0;left: 35px;}
}