h2 {
	line-height: 55px;
	font-size: 45px;
	color: #333333;
	font-weight: lighter;
}
h2 strong {
	font-weight: bold;
}
.about1 {
	width: 100%;
	overflow: hidden;
	padding: 162px 0 0;
}
.about1-top {
	width: 100%;
	overflow: hidden;
	padding: 0 0 18px;
	border-bottom: 1px solid #eeeeee;
}
.about1-top h2 {
	float: left;
}
.about1-top p {
	float: right;
	color: #9b9b9b;
	line-height: 22px;
	margin: 33px 0 0;
}
.about1-bottom {
	width: 100%;
	padding: 47px 0 0;
	overflow: hidden;
}
.about1-bottom .about1-img {
	width: 100%;
	overflow: hidden;
	margin: 0 0 45px;
}
.about1-img img {
	width: 100%;
}
.about1-left {
	width: 1110px;
	color: #666666;
	line-height: 32px;
	font-size: 16px;
	overflow: hidden;
	float: left;
}
.about1-left li {
	width: 535px;
	overflow: hidden;
	float: left;
}
.about1-left li:nth-of-type(2) {
	float: right;
}
.about1-left p {
	margin: 0 0 10px;
}
.about1-right {
	width: 220px;
	padding: 0 0 10px;
	text-align: right;
	overflow: hidden;
	float: right;
}
.about1-right li {
	color: #666666;
	font-size: 14px;
	line-height: 20px;
}
@font-face {
	font-family: seguibl;
	src: url("../font/seguibl.ttf") format("truetype");
	font-weight: normal;
	font-style: normal;
}
.about1-right li h2 {
	font-size: 72px;
	line-height: 65px;
	font-family: seguibl;
	margin: 0 0 7px;
	color: #dc252a;
}
.about1-right li:nth-of-type(2) {
	height: 190px;
	padding: 45px 0;
	margin: 40px 0;
	position: relative;
}
.about1-right li:nth-of-type(2):before,.about1-right li:nth-of-type(2):after {
	content: '';
	display: block;
	width: 155px;
	height: 1px;
	overflow: hidden;
	background-color: #ebebeb;
	position: absolute;
	top: 0px;
	right: 3px;
}
.about1-right li:nth-of-type(2):after {
	top: auto;
	bottom: 0px;
}
@media only screen and (max-width: 991px) {
	.about1 {
		padding: 170px 0 0;
	}
	.about1-top p {
		display: none;
	}
	.about1-bottom {
		padding: 38px 0 0;
	}
	.about1-left {
		width: 100%;
		line-height: 42px;
		font-size: 24px;
		float: none;
		text-align: justify;
	}
	.about1-left li {
		width: 100%;
		float: none !important;
	}
	.about1-right {
		width: 100%;
		text-align: center;
		float: none;
		padding: 0;
		margin: 45px 0 80px;
	}
	.about1-right li {
		float: left;
	}
	.about1-right li h2 {
		font-size: 60px;
		line-height: 55px;
		margin: 0 0 10px;
	}
	.about1-right li:nth-of-type(2) {
		height: auto;
		padding: 0 50px 0 75px;
		margin: 0 50px 0 70px;
		position: relative;
	}
	.about1-right li:nth-of-type(2):before,.about1-right li:nth-of-type(2):after {
		width: 1px;
		height: 67px;
		top: 14px;
		right: auto;
		left: 0px;
	}
	.about1-right li:nth-of-type(2):after {
		right: 0px;
		left: auto;
	}
}
@media only screen and (max-width: 750px) {
	h2 {
		line-height: 45px;
		font-size: 36px;
	}
	.about1 {
		padding: 100px 0 0;
	}
	.about1-top {
		padding: 0 0 10px;
	}
	.about1-bottom .about1-img {
		margin: 0 0 25px;
	}
	.about1-bottom {
		padding: 20px 0 0;
	}
	.about1-left {
		line-height: 25px;
		font-size: 14px;
	}
	.about1-left p {
	    margin: 0 0 5px;
	}
	.about1-right {
		margin: 20px 0 40px;
	}
	.about1-right li {
		font-size: 12px;
	}
	.about1-right li h2 {
		font-size: 36px;
		line-height: 30px;
	}
	.about1-right li:nth-of-type(2) {
		padding: 0 17px;
		margin: 0 18px;
	}
	.about1-right li:nth-of-type(2):before,.about1-right li:nth-of-type(2):after {
		height: 35px;
		top: 14px;
	}
}
@media only screen and (min-width: 992px) {
	h2 {
		line-height: 40px;
		font-size: 36px;
	}
	.about1 {
		padding: 120px 0 0;
		background-image: url(../img/about.jpg);
		background-repeat: no-repeat;
		background-position: top center;
		background-size: 1200px;
	}
	.about1-top {
		padding: 0 0 15px;
	}
	.about1-top p {
		line-height: 20px;
		margin: 20px 0 0;
	}
	.about1-bottom {
		padding: 180px 0 40px;
	}
	.about1-bottom .about1-img {
		display: none;
	}
	.about1-left {
		width: 780px;
		line-height: 22px;
		font-size: 13px;
	}
	.about1-left li {
		width: 370px;
		text-align: justify;
	}
	.about1-left p {
		margin: 0 0 5px;
	}
	.about1-right {
		width: 160px;
	}
	.about1-right li {
		font-size: 12px;
		line-height: 16px;
	}
	.about1-right li h2 {
		font-size: 48px;
		line-height: 40px;
		margin: 0 0 5px;
	}
	.about1-right li:nth-of-type(2) {
		height: 120px;
		padding: 30px 0;
		margin: 20px 0;
	}
	.about1-right li:nth-of-type(2):before,.about1-right li:nth-of-type(2):after {
		width: 100px;
		right: 0px;
	}
}
@media only screen and (min-width: 1200px) {
	h2 {
		line-height: 45px;
		font-size: 40px;
	}
	.about1 {
		padding: 135px 0 0;
		background-size: 1500px;
	}
	.about1-top p {
		margin: 25px 0 0;
	}
	.about1-bottom {
		padding: 250px 0 0;
	}
	.about1-left {
		width: 920px;
		line-height: 25px;
		font-size: 14px;
	}
	.about1-left li {
		width: 440px;
	}
	.about1-left p {
		margin: 0 0 8px;
	}
	.about1-right {
		width: 200px;
	}
	.about1-right li {
		font-size: 13px;
		line-height: 18px;
	}
	.about1-right li h2 {
		font-size: 64px;
		line-height: 55px;
	}
	.about1-right li:nth-of-type(2) {
		height: 150px;
		padding: 35px 0;
		margin: 30px 0;
	}
	.about1-right li:nth-of-type(2):before,.about1-right li:nth-of-type(2):after {
		width: 125px;
	}
}
@media only screen and (min-width: 1450px) {
	h2 {
		line-height: 55px;
		font-size: 45px;
	}
	.about1 {
		padding: 162px 0 0;
		background-size: 1920px;
	}
	.about1-top {
		padding: 0 0 18px;
	}
	.about1-top p {
		line-height: 22px;
		margin: 33px 0 0;
	}
	.about1-bottom {
		padding: 365px 0 0;
	}
	.about1-left {
		width: 1110px;
		line-height: 32px;
		font-size: 16px;
	}
	.about1-left li {
		width: 535px;
	}
	.about1-left p {
		margin: 0 0 10px;
	}
	.about1-right {
		width: 220px;
	}
	.about1-right li {
		font-size: 14px;
		line-height: 20px;
	}
	.about1-right li h2 {
		font-size: 72px;
		line-height: 65px;
		margin: 0 0 7px;
	}
	.about1-right li:nth-of-type(2) {
		height: 190px;
		padding: 45px 0;
		margin: 40px 0;
	}
	.about1-right li:nth-of-type(2):before,.about1-right li:nth-of-type(2):after {
		width: 155px;
		right: 3px;
	}
}
@media only screen and (min-width: 1921px) {
	.about1 {
		background-size: 100%;
	}
}
/*关于视频*/
.about2 {
	width: 100%;
	padding: 130px 0 165px;
	overflow: hidden;
	position: relative;
}
.about2:before {
	content: '';
	display: block;
	width: 815px;
	height: 100%;
	overflow: hidden;
	background-color: #d1121b;
	position: absolute;
	left: 50%;
	top: 0px;
	margin-left: -960px;
}
.about2 .about2-video {
	width: 100%;
	overflow: hidden;
	position: relative;
	z-index: 2;
}
.about2-video img {
	width: 100%;
}
.about2-video .about2-icon {
	width: 105px;
	height: 105px;
	overflow: hidden;
	position: absolute;
	left: 50%;
	top: 50%;
	margin: -52.5px 0 0 -52.5px;
	z-index: 1;
	cursor: pointer;
}
@media only screen and (max-width: 991px) {
	.about2 {
		padding: 195px 0 85px;
	}
	.about2:before {
		width: 100%;
		height: 435px;
		left: 0px;
		margin-left: 0px;
	}
	.about2-video>img {
		width: 1074px;
		position: relative;
		left: 50%;
		margin-left: -537px;
	}
}
@media only screen and (max-width: 750px) {
	.about2 {
		padding: 80px 0 45px;
	}
	.about2:before {
		height: 200px;
	}
	.about2-video>img {
		width: 580px;
		margin-left: -290px;
	}
	.about2-video .about2-icon {
		width: 60px;
		height: 60px;
		margin: -30px 0 0 -30px;
	}
}
@media only screen and (min-width: 992px) {
	.about2 {
		padding: 90px 0 115px;
	}
	.about2:before {
		width: 570px;
		margin-left: -600px;
	}
	.about2-video .about2-icon {
		width: 76px;
		height: 76px;
		margin: -38px 0 0 -38px;
	}
}
@media only screen and (min-width: 1200px) {
	.about2 {
		padding: 105px 0 130px;
	}
	.about2:before {
		width: 655px;
		margin-left: -725px;
	}
	.about2-video .about2-icon {
		width: 90px;
		height: 90px;
		margin: -45px 0 0 -45px;
	}
}
@media only screen and (min-width: 1450px) {
	.about2 {
		padding: 130px 0 165px;
	}
	.about2:before {
		width: 815px;
		margin-left: -960px;
	}
	.about2-video .about2-icon {
		width: 105px;
		height: 105px;
		margin: -52.5px 0 0 -52.5px;
	}
}
@media only screen and (min-width: 1921px) {
	.about2:before {
		width: -moz-calc(50% - 145px);
		width: -webkit-calc(50% - 145px);
		width: calc(50% - 145px);
		margin-left: 0px;
		left: 0px;
	}
}
/*以优于国家标准的细节把控 赢得客户的长久信赖*/
.about3 {
	width: 100%;
	padding: 100px 0 70px;
	font-size: 50px;
	line-height: 65px;
	color: #333333;
	overflow: hidden;
	text-align: center;
	background-image: url(../img/about3.jpg);
	background-repeat: no-repeat;
	background-position: center;
}
@media only screen and (max-width: 991px) {
	.about3 {
		padding: 85px 0;
		font-size: 50px;
		line-height: 65px;
	}
}
@media only screen and (max-width: 750px) {
	.about3 {
		padding: 50px 0;
		font-size: 24px;
		line-height: 30px;
		background-size: auto 100%;
		background-position: right center;
	}
}
@media only screen and (min-width: 992px) {
	.about3 {
		padding: 70px 0 50px;
		font-size: 36px;
		line-height: 45px;
	}
}
@media only screen and (min-width: 1200px) {
	.about3 {
		padding: 80px 0 60px;
		font-size: 40px;
		line-height: 50px;
	}
}
@media only screen and (min-width: 1450px) {
	.about3 {
		padding: 100px 0 70px;
		font-size: 50px;
		line-height: 65px;
	}
}
@media only screen and (min-width: 1921px) {
	.about3 {
		background-size: 100%;
	}
}
/*技术研发*/
.about4 {
	width: 100%;
	height: 860px;
	padding: 215px 0 0;
	background-image: url(../img/about4.jpg);
	background-repeat: no-repeat;
	background-position: center;
}
.about4 .about4-txt {
	width: 50%;
	color: #FFFFFF;
	font-size: 16px;
	line-height: 23px;
	overflow: hidden;
}
.about4-txt h2 {
	color: #FFFFFF;
	margin: 0 0 15px;
}
.about4-img {
	width: 100%;
	overflow: hidden;
}
.about4-img img {
	width: 100%;
}
@media only screen and (max-width: 991px) {
	.about4 {
		height: auto;
		padding: 125px 0 100px;
		background-image: url(../img/about4s.jpg);
		background-size: auto 100%;
	}
	.about4 .about4-txt {
		width: 100%;
		font-size: 22px;
		line-height: 32px;
	}
	.about4-txt h2 {
		margin: 0 0 15px;
	}
	.about4-img {
		width: 500px;
		margin: 50px auto 0;
	}
}
@media only screen and (max-width: 750px) {
	.about4 {
		padding: 60px 0 50px;
		background-image: url(../img/about4s.jpg);
		background-size: auto 100%;
	}
	.about4 .about4-txt {
		font-size: 14px;
		line-height: 22px;
	}
	.about4-txt h2 {
		margin: 0 0 10px;
	}
	.about4-img {
		width: 300px;
		margin: 30px auto 0;
	}
}
@media only screen and (min-width: 992px) {
	.about4 {
		height: 600px;
		padding: 100px 0 0;
		background-attachment: fixed;
		background-size: 1325px;
	}
	.about4 .about4-txt {
		font-size: 12px;
		line-height: 18px;
		float: left;
	}
	.about4-txt h2 {
		margin: 0 0 10px;
	}
	.about4-txt br:nth-of-type(1),.about4-txt br:nth-of-type(3),.about4-txt br:nth-of-type(4) {
		display: none;
	}
	.about4-img {
		width: 463px;
		float: right;
	}
}
@media only screen and (min-width: 1200px) {
	.about4 {
		height: 690px;
		padding: 120px 0 0;
		background-size: 1500px;
	}
	.about4 .about4-txt {
		font-size: 14px;
		line-height: 20px;
	}
	.about4-txt h2 {
		margin: 0 0 12px;
	}
	.about4-img {
		width: 563px;
	}
}
@media only screen and (min-width: 1450px) {
	.about4 {
		height: 860px;
		padding: 180px 0 0;
		background-size: 1920px;
	}
	.about4 .about4-txt {
		font-size: 16px;
		line-height: 23px;
	}
	.about4-txt h2 {
		margin: 0 0 15px;
	}
}
@media only screen and (min-width: 1921px) {
	.about4 {
		background-size: 100%;
	}
}