/*about公共部分*/
.about_common{
	width: 100%;
	overflow: hidden;
	background:#fff url(../img/images/about_bg.jpg) no-repeat top center;
	background-size: 100%;
	padding-top: 60px;
	position: relative;
	z-index: 11;
}
.about_menu{
	width: 100%;
	height: 50px;
	margin-bottom: 55px;
	border: 1px solid #f0f0f0;
	box-shadow: 0px 3px 3px rgba(0,0,0,0.04);
	text-align: center;
	background-color: #fff;
	position: relative;
}
.about_menu li a{
	display: block;
	color: #000;
	height: 48px;
	font-size: 14px;
	line-height: 50px;
	width: 80px;
	margin: 0 auto;
}
.about_menu li.about_now a{
	font-weight: bold;
}
.about_content{
	color: #626262;
	font-size: 14px;
	line-height: 25px;
}
.about_content h1{
	color: #3e3e3e;
	font-size: 36px;
	margin: 35px 0 30px;
}
.about_menu .border_bottom{
	width: 80px;
	height: 2px;
	background-color: #181878;
	position: absolute;
	bottom: 0;
	left: 0;
	transition: all 0.5s;
}
/*about页面独有*/
.work_environmental{
	width: 100%;
	overflow: hidden;
}
.work_environmental li div{
	width: 100%;
	overflow: hidden;
}
.work_environmental li img{
	width: 100%; 
	transition: all 0.5s;
}
.work_environmental li:hover img{
	transform: scale(1.1);
}
@media only screen and (max-width:767px ) {
	.work_environmental li{
		margin-bottom: 15px;
		overflow: hidden;
	}
	.about_common{
		padding-top: 30px;
	}
	.about_menu{
		display: none;
	}
	.about_content h1{
		color: #3e3e3e;
		font-size: 24px !important;
		margin: 20px 0 15px !important;
	}
}
@media only screen and (min-width:768px ) {
	.about_menu{
		display: none;
	}
	.work_environmental li:nth-of-type(2n+1){
		padding-right: 10px;
		margin-bottom: 25px;
		overflow: hidden;
	}
	.work_environmental li:nth-of-type(2n){
		padding-left: 10px;
		margin-bottom: 25px;
		overflow: hidden;
	}
}
@media only screen and (min-width:992px ) {
	.about_menu{
		display: block;
	}
	.work_environmental li:nth-of-type(2n+1){
		padding-right: 20px;
		margin-bottom: 35px;
	}
	.work_environmental li:nth-of-type(2n){
		padding-left: 20px;
		margin-bottom: 35px;
	}
}
@media only screen and (min-width:1200px) {
	
}