.about1 {
	width: 100%;
	overflow: hidden;
	padding: 80px 0 0;
}
.about1-left {
	float: left;
	width: 450px;
	overflow: hidden;
}
.about1-left p {
	color: #666666;
	font-size: 20px;
	margin: 15px 0 0;
	line-height: 25px;
}
.about1-right {
	float: right;
	width: 605px;
	color: #5f5f5f;
	font-size: 16px;
	overflow: hidden;
	padding: 10px 0 0;
	line-height: 26px;
}
.about1-right p {
	margin: 0 0 15px;
}
.about1-right p:last-of-type {
	margin: 0;
}
@media only screen and (max-width: 991px) {
	.about1 {
		padding: 80px 0 0;
	}
	.about1-left {
		float: none;
		width: 100%;
		margin: 0 0 40px;
	}
	.about1-left p {
		font-size: 24px;
		margin: 10px 0 0;
		line-height: 30px;
	}
	.about1-right {
		padding: 0;
		float: none;
		width: 100%;
		font-size: 24px;
		line-height: 45px;
	}
	.about1-right p {
		margin: 0 0 10px;
	}
}
@media only screen and (max-width: 750px) {
	.about1 {
		padding: 40px 0 0;
	}
	.about1-left {
		margin: 0 0 20px;
	}
	.about1-left p {
		font-size: 12px;
		margin: 5px 0 0;
		line-height: 20px;
	}
	.about1-right {
		font-size: 14px;
		line-height: 25px;
	}
	.about1-right p {
		margin: 0 0 5px;
	}
}
@media only screen and (min-width: 992px) {
	.about1 {
		padding: 50px 0 0;
	}
	.about1-left {
		width: 300px;
	}
	.about1-left p {
		font-size: 14px;
		margin: 5px 0 0;
	}
	.about1-right {
		width: 450px;
		font-size: 14px;
		padding: 5px 0 0;
		line-height: 22px;
	}
	.about1-right p {
		margin: 0 0 10px;
	}
}
@media only screen and (min-width: 1200px) {
	.about1 {
		padding: 65px 0 0;
	}
	.about1-left {
		width: 350px;
	}
	.about1-left p {
		font-size: 16px;
		margin: 10px 0 0;
	}
	.about1-right {
		width: 510px;
		font-size: 15px;
		padding: 8px 0 0;
		line-height: 24px;
	}
	.about1-right p {
		margin: 0 0 12px;
	}
}
@media only screen and (min-width: 1400px) {
	.about1 {
		padding: 80px 0 0;
	}
	.about1-left {
		width: 450px;
	}
	.about1-left p {
		font-size: 20px;
		margin: 15px 0 0;
	}
	.about1-right {
		width: 605px;
		font-size: 16px;
		padding: 10px 0 0;
		line-height: 26px;
	}
	.about1-right p {
		margin: 0 0 15px;
	}
}
/*视频弹出框*/
.video-masked {
	top: 0px;
	right: 0px;
	height: 100%;
	z-index: 100;
	display: none;
	position: fixed;
	overflow: hidden;
	width: -moz-calc(100% - 240px);
	width: -webkit-calc(100% - 240px);
	width: calc(100% - 240px);
	background-color: rgba(0,0,0,0.8);
}
.video-masked .masked-x {
	top: 15px;
	right: 15px;
	width: 36px;
	height: 36px;
	cursor: pointer;
	overflow: hidden;
	position: absolute;
}
.masked-x:before,.masked-x:after {
	top: 50%;
	left: 50%;
	content: '';
	width: 40px;
	height: 6px;
	display: block;
	overflow: hidden;
	position: absolute;
	border-radius: 3px;
	margin: -3px 0 0 -20px;
	transform: rotate(45deg);
	background-color: #FFFFFF;
}
.masked-x:after {
	transform: rotate(-45deg);
}
.video-masked video {
	top: 50%;
	left: 50%;
	width: 1200px;
	height: 600px;
	display: block;
	position: relative;
	background-color: #000000;
	margin: -300px 0 0 -600px;
}
@media only screen and (max-width: 991px) {
	.video-masked {
		width: 100%;
	}
	.video-masked video {
		width: 660px;
		height: 350px;
		margin: -175px 0 0 -330px;
	}
}
@media only screen and (max-width: 750px) {
	.video-masked .masked-x {
		top: 10px;
		right: 10px;
		width: 26px;
		height: 26px;
	}
	.masked-x:before,.masked-x:after {
		width: 30px;
		height: 4px;
		border-radius: 2px;
		margin: -2px 0 0 -15px;
	}
	.video-masked video {
		width: 330px;
		height: 200px;
		margin: -100px 0 0 -165px;
	}
}
@media only screen and (min-width: 992px) {
	.video-masked {
		width: -moz-calc(100% - 170px);
		width: -webkit-calc(100% - 170px);
		width: calc(100% - 170px);
	}
	.video-masked video {
		width: 800px;
		height: 440px;
		margin: -220px 0 0 -400px;
	}
}
@media only screen and (min-width: 1200px) {
	.video-masked {
		width: -moz-calc(100% - 200px);
		width: -webkit-calc(100% - 200px);
		width: calc(100% - 200px);
	}
	.video-masked video {
		width: 900px;
		height: 450px;
		margin: -225px 0 0 -450px;
	}
}
@media only screen and (min-width: 1400px) {
	.video-masked video {
		width: 1050px;
		height: 525px;
		margin: -265px 0 0 -525px;
	}
}
@media only screen and (min-width: 1600px) {
	.video-masked {
		width: -moz-calc(100% - 240px);
		width: -webkit-calc(100% - 240px);
		width: calc(100% - 240px);
	}
	.video-masked video {
		width: 1200px;
		height: 600px;
		margin: -300px 0 0 -600px;
	}
}
/*宣传视频*/
.about2 {
	width: 100%;
	overflow: hidden;
	margin: 100px 0 0;
}
.about2-top {
	width: 100%;
	overflow: hidden;
	position: relative;
	border-radius: 20px;
}
.about2-top>img {
	width: 100%;
}
.about2-icon {
	top: 50%;
	left: 50%;
	z-index: 1;
	width: 114px;
	height: 114px;
	cursor: pointer;
	overflow: hidden;
	text-align: center;
	position: absolute;
	line-height: 110px;
	border-radius: 50%;
	margin: -57px 0 0 -57px;
	border: 1px solid #FFFFFF;
	background-color: rgba(255,255,255,0.15);
}
.about2 h3 {
	color: #333333;
	font-size: 44px;
	line-height: 58px;
	margin: 100px 0 65px;
}
.about2 h3 span {
	color: #a1191a;
}
@media only screen and (max-width: 991px) {
	.about2 {
		margin: 55px 0 0;
	}
	.about2-top {
		border-radius: 20px;
	}
	.about2-icon {
		width: 76px;
		height: 76px;
		line-height: 72px;
		margin: -38px 0 0 -38px;
	}
	.about2-icon img {
		width: 20px;
	}
	.about2 h3 {
		font-size: 36px;
		line-height: 45px;
		margin: 70px 0 50px;
	}
}
@media only screen and (max-width: 750px) {
	.about2 {
		margin: 30px 0 0;
	}
	.about2-top {
		border-radius: 10px;
	}
	.about2-icon {
		width: 40px;
		height: 40px;
		line-height: 36px;
		margin: -20px 0 0 -20px;
	}
	.about2-icon img {
		width: 12px;
	}
	.about2 h3 {
		font-size: 18px;
		line-height: 25px;
		margin: 35px 0 25px;
	}
}
@media only screen and (min-width: 992px) {
	.about2 {
		margin: 60px 0 0;
	}
	.about2-icon {
		width: 80px;
		height: 80px;
		line-height: 76px;
		margin: -40px 0 0 -40px;
	}
	.about2-icon img {
		width: 20px;
	}
	.about2 h3 {
		font-size: 36px;
		line-height: 45px;
		margin: 60px 0 40px;
	}
}
@media only screen and (min-width: 1200px) {
	.about2 {
		margin: 80px 0 0;
	}
	.about2-icon {
		width: 100px;
		height: 100px;
		line-height: 96px;
		margin: -50px 0 0 -50px;
	}
	.about2-icon img {
		width: 25px;
	}
	.about2 h3 {
		font-size: 40px;
		line-height: 52px;
		margin: 80px 0 50px;
	}
}
@media only screen and (min-width: 1400px) {
	.about2 {
		margin: 100px 0 0;
	}
	.about2-icon {
		width: 114px;
		height: 114px;
		line-height: 110px;
		margin: -57px 0 0 -57px;
	}
	.about2-icon img {
		width: 31px;
	}
	.about2 h3 {
		font-size: 44px;
		line-height: 58px;
		margin: 100px 0 65px;
	}
}
/*技术研发*/
.about3 {
	width: 100%;
	overflow: hidden;
	padding: 100px 0 145px;
	background-image: url(../img/about3.jpg);
	background-repeat: no-repeat;
	background-position: center;
	background-size: cover;
	text-align: right;
}
.about3 p {
	color: #FFFFFF;
	font-size: 24px;
	margin: 0 0 45px;
	line-height: 36px;
}
.about3-img {
	float: right;
	width: 450px;
	overflow: hidden;
	border-radius: 10px;
}
.about3-img img {
	width: 100%;
	transition: all 0.5s;
}
@media only screen and (max-width: 991px) {
	.about3 {
		padding: 120px 0 90px;
	}
	.about3 p {
		font-size: 24px;
		margin: 0 0 60px;
		line-height: 31px;
	}
	.about3-img {
		width: 295px;
		border-radius: 8px;
	}
}
@media only screen and (max-width: 750px) {
	.about3 {
		padding: 60px 0 45px;
	}
	.about3 p {
		font-size: 14px;
		margin: 0 0 30px;
		line-height: 22px;
	}
	.about3-img {
		width: 150px;
		border-radius: 5px;
	}
}
@media only screen and (min-width: 992px) {
	.about3 {
		padding: 60px 0 100px;
	}
	.about3 p {
		font-size: 16px;
		margin: 0 0 30px;
		line-height: 25px;
	}
	.about3-img {
		width: 300px;
	}
}
@media only screen and (min-width: 1200px) {
	.about3 {
		padding: 80px 0 120px;
	}
	.about3 p {
		font-size: 20px;
		margin: 0 0 35px;
		line-height: 30px;
	}
	.about3-img {
		width: 370px;
	}
}
@media only screen and (min-width: 1400px) {
	.about3 {
		padding: 100px 0 145px;
	}
	.about3 p {
		font-size: 24px;
		margin: 0 0 45px;
		line-height: 36px;
	}
	.about3-img {
		width: 450px;
	}
}
/*资质荣誉*/
.about4 {
	width: 100%;
	padding: 100px 0;
	overflow: hidden;
	position: relative;
	background-image: url(../img/about4.jpg);
	background-repeat: no-repeat;
	background-position: center;
	background-size: cover;
}
.about4:after {
	left: 0px;
	bottom: 0px;
	content: '';
	width: 100%;
	height: 42%;
	display: block;
	overflow: hidden;
	position: absolute;
	background-color: #a1191a;
}
.about4-top {
	width: 100%;
	overflow: hidden;
	margin: 0 0 100px;
}
.about4-top h2 {
	float: left;
}
.about4-top p {
	float: right;
	font-size: 20px;
	margin: 33px 0 0;
	line-height: 32px;
	text-align: right;
}
.about4 .swiper {
	z-index: 2;
	width: 100%;
	overflow: visible;
	position: relative;
}
.about4 .swiper .swiper-slide {
	width: 350px;
	cursor: pointer;
	overflow: hidden;
	text-align: center;
	box-shadow: 4.66px -12.13px 36px rgba(0,0,0,0.14);
}
.about4-img {
	width: 100%;
	height: 325px;
	display: block;
	overflow: hidden;
	padding: 25px 35px;
	background-color: #FFFFFF;
}
.about4-img img {
	width: 100%;
	height: 100%;
	transition: all 0.5s;
	-o-object-fit: contain;
    object-fit: contain;
}
.about4-txt {
	width: 100%;
	height: 60px;
	padding: 10px;
	display: block;
	color: #333333;
	overflow: hidden;
	background-color: #e1e1e1;
	display: -webkit-flex; /* Safari */
	-webkit-align-items: center; /* Safari 7.0+ */
	display: flex;
	align-items: center;
}
.about4-txt p {
	width: 100%;
	font-size: 16px;
	overflow: hidden;
	line-height: 20px;
	display: inline-block;
}
.about4 .swiper .swiper-slide:hover .about4-img img {
	transform: scale(1.15);
}
.about4 .swiper .swiper-slide:hover .about4-txt {
	color: #a1191a;
}
@media only screen and (max-width: 991px) {
	.about4 {
		padding: 70px 0;
	}
	.about4:after {
		height: 29.4%;
	}
	.about4-top {
		margin: 0 0 100px;
	}
	.about4-top h2 {
		float: none;
	}
	.about4-top p {
		float: none;
		font-size: 24px;
		margin: 35px 0 0;
		text-align: left;
		line-height: 31px;
	}
	.about4 .swiper .swiper-slide {
		width: 300px;
	}
	.about4-img {
		height: 280px;
		padding: 20px 28px;
	}
	.about4-txt {
		height: 55px;
	}
	.about4-txt p {
		height: 35px;
		font-size: 21px;
		line-height: 35px;
	}
}
@media only screen and (max-width: 750px) {
	.about4 {
		padding: 35px 0;
	}
	.about4-top {
		margin: 0 0 50px;
	}
	.about4-top p {
		font-size: 12px;
		margin: 20px 0 0;
		line-height: 20px;
	}
	.about4 .swiper .swiper-slide {
		width: 160px;
	}
	.about4-img {
		height: 145px;
		padding: 10px 15px;
	}
	.about4-txt {
		height: 40px;
	}
	.about4-txt p {
		height: 20px;
		font-size: 12px;
		line-height: 20px;
	}
}
@media only screen and (min-width: 992px) {
	.about4 {
		padding: 60px 0;
		background-attachment: fixed;
	}
	.about4-top {
		margin: 0 0 60px;
	}
	.about4-top p {
		font-size: 14px;
		margin: 20px 0 0;
		line-height: 25px;
	}
	.about4 .swiper .swiper-slide {
		width: 300px;
		box-shadow: 4.66px -12.13px 25px rgba(0,0,0,0.14);
	}
	.about4-img {
		height: 275px;
		padding: 15px 25px;
	}
	.about4-txt {
		height: 48px;
		padding: 8px;
	}
	.about4-txt p {
		font-size: 12px;
		line-height: 16px;
	}
}
@media only screen and (min-width: 1200px) {
	.about4 {
		padding: 80px 0;
	}
	.about4-top {
		margin: 0 0 80px;
	}
	.about4-top p {
		font-size: 16px;
		margin: 25px 0 0;
		line-height: 30px;
	}
	.about4 .swiper .swiper-slide {
		width: 325px;
		box-shadow: 4.66px -12.13px 30px rgba(0,0,0,0.14);
	}
	.about4-img {
		height: 300px;
		padding: 20px 30px;
	}
	.about4-txt {
		height: 54px;
		padding: 9px;
	}
	.about4-txt p {
		font-size: 14px;
		line-height: 18px;
	}
}
@media only screen and (min-width: 1400px) {
	.about4 {
		padding: 100px 0;
	}
	.about4-top {
		margin: 0 0 100px;
	}
	.about4-top p {
		font-size: 20px;
		margin: 33px 0 0;
		line-height: 32px;
	}
	.about4 .swiper .swiper-slide {
		width: 350px;
		box-shadow: 4.66px -12.13px 36px rgba(0,0,0,0.14);
	}
	.about4-img {
		height: 325px;
		padding: 25px 35px;
	}
	.about4-txt {
		height: 60px;
		padding: 10px;
	}
	.about4-txt p {
		font-size: 16px;
		line-height: 20px;
	}
}