section {
	position: relative;
	z-index: 1;
}

/* swiper样式 */
.swiper-container {
    width: 100%;
    height: 100%;
}

.swiper-slide {
  	text-align: center;
  	font-size: 18px;
  	background: #fff;
  	/* Center slide text vertically */
 	 display: -webkit-box;
 	 display: -ms-flexbox;
  	display: -webkit-flex;
  	display: flex;
  	-webkit-box-pack: center;
  	-ms-flex-pack: center;
  	-webkit-justify-content: center;
  	justify-content: center;
 	-webkit-box-align: center;
 	-ms-flex-align: center;
  	-webkit-align-items: center;
  	align-items: center;
}

/* 主体内容公司简介.about样式 */
.main {
	background-color: #FFFFFF;
}

.main .item1 {
	background-image: url(../images/index_product_bg.png);
	background-size: cover;
	background-position: center center;
	width: 100%;
	height: 945px;
	box-sizing: border-box;
	padding-top: 100px;
}

.main .item1 h4.title {
	font-family: pingfangm;
	font-size: 45px;
	font-weight: 500;
	color: #231815;
	text-align: center;
	line-height: 83px;
	background-image: url(../images/index_title_bg.png);
	background-repeat: no-repeat;
	background-position: bottom center;
	margin-bottom: 80px;
}

.main .item1 .item1_list {
	display: flex;
	flex-flow: row nowrap;
	justify-content: space-between;
}

.main .item1 .item1_list li {
	width: calc((100% - 120px) / 4);
}

.main .item1 .item1_list li img {
	display: block;
	width: 100%;
}

.main .item1 .item1_list li p {
	font-family: pingfangm;
	font-size: 24px;
	color: #333333;
	text-align: center;
	line-height: 104px;
}

.main .item1 a.more {
	display: block;
	background-color: #009fe8;
	width: 150px;
	height: 50px;
	font-family: pingfangm;
	font-size: 16px;
	color: #FFFFFF;
	text-align: center;
	line-height: 50px;
	background-image: url(../images/more_bg.png);
	background-repeat: no-repeat;
	background-position: right 25px center;
	margin: 0 auto;
	margin-top: 40px;
}

.main .item2 {
	
}

.main .item2 .item2_list {
	display: flex;
	flex-flow: row wrap;
	justify-content: space-between;
	position: relative;
}

.main .item2 .item2_list li {
	width: 50%;
	height: 465px;
	background-size: cover;
	background-position: center center;
	position: relative;
	text-align: center;
	line-height: 465px;
}

.main .item2 .item2_list li:nth-of-type(1) {
	background-image: url(../images/case_p1.jpg);
}

.main .item2 .item2_list li:nth-of-type(2) {
	background-image: url(../images/case_p2.jpg);
}

.main .item2 .item2_list li:nth-of-type(3) {
	background-image: url(../images/case_p3.jpg);
}

.main .item2 .item2_list li:nth-of-type(4) {
	background-image: url(../images/case_p4.jpg);
}

.main .item2 .item2_list li a {
	display: inline-block;
	font-family: pingfangb;
	font-size: 36px;
	color: #FFFFFF;
	line-height: 56px;
	border-bottom: 2px solid #FFFFFF;
	padding-right: 30px;
	background-image: url(../images/more_bg.png);
	background-repeat: no-repeat;
	background-position: right center;
	background-size: 14px 22px;
}

.main .item2 .item2_list li.case_more {
	background-image: url(../images/case_center.png);
	background-repeat: no-repeat;
	background-position: center center;
	width: 406px;
	height: 444px;
	position: absolute;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	margin: auto;
}

.main .item2 .item2_list li.case_more a {
	font-family: pingfangm;
	font-size: 45px;
	border: none;
	background-image: none;
	padding-right: 0px;
}

.main .item2 .item2_list li.case_more i {
	display: block;
	width: 54px;
	height: 54px;
	border-radius: 50%;
	border: 1px solid rgba(255,255,255,.2);
	background-image: url(../images/more_bg.png);
	background-repeat: no-repeat;
	background-position: center center;
	background-size: 13px 22px;
	position: absolute;
	left: 0;
	right: 0;
	margin: 0 auto;
	bottom: 120px;
}

.main .item3 {
	width: 100%;
	height: 660px;
	background-image: url(../images/index_sever_bg.png);
	background-position: center center;
	background-size: cover;
	box-sizing: border-box;
	padding-top: 145px;
}

.main .item3 .item3_list {
	display: flex;
	flex-flow: row nowrap;
	justify-content: space-between;
}

.main .item3 .item3_list li {
	width: calc((100% - 120px) / 4);
	height: 370px;
	background-image: url(../images/item3_list_bg.png);
	background-size: cover;
	background-position: center center;
	transition: 0.5s;
}

.main .item3 .item3_list li .pic {
	width: 160px;
	height: 160px;
	box-sizing: border-box;
	border: 4px solid #f5f5f5;
	border-radius: 50%;
	margin: 0 auto;
	margin-top: 74px;
	background-repeat: no-repeat;
	background-position: center center;
}

.main .item3 .item3_list li:nth-of-type(1) .pic {
	background-image: url(../images/sever_p1.png);
	
}

.main .item3 .item3_list li:nth-of-type(2) .pic {
	background-image: url(../images/sever_p2.png);
}

.main .item3 .item3_list li:nth-of-type(3) .pic {
	background-image: url(../images/sever_p3.png);
}

.main .item3 .item3_list li:nth-of-type(4) .pic {
	background-image: url(../images/sever_p4.png);
}

.main .item3 .item3_list li p {
	font-family: pingfangm;
	font-size: 24px;
	color: #333333;
	text-align: center;
	line-height: 82px;
}

.main .item3 .item3_list li:hover {
	background-image: url(../images/item3_list_bbg.png);
	margin-top: -50px;
}

.main .item3 .item3_list li:hover .pic {
	border: none;
	background-color: #FFFFFF;
}

.main .item3 .item3_list li:hover p {
	color: #FFFFFF;
}

.main .item4 {
	background-image: url(../images/about_p1.jpg);
	background-repeat: no-repeat;
	background-position: left center;
	height: 740px;
}

.main .item4 .txt {
	width: 740px;
	padding-top: 195px;
}

.main .item4 .txt h4.title {
	font-family: pingfangm;
	font-size: 45px;
	color: #231815;
	line-height: 83px;
	margin-bottom: 20px;
	background-image: url(../images/index_title_bg.png);
	background-repeat: no-repeat;
	background-position: left bottom;
}

.main .item4 .txt .about_summary p {
	font-family: pingfangr;
	font-size: 14px;
	color: #808080;
	line-height: 35px;
}

.main .item4 .txt a.more {
	display: block;
	width: 150px;
	height: 50px;
	background-color: #009fe8;
	font-family: pingfangm;
	font-size: 16px;
	color: #FFFFFF;
	text-align: center;
	line-height: 50px;
	background-image: url(../images/more_bg.png);
	background-repeat: no-repeat;
	background-position: right 30px center;
	margin-top: 40px;
}

@media screen and (max-width: 1730px ) {
	.main .item4 .txt {
		background-color: #FFFFFF;
		box-sizing: border-box;
		padding-left: 20px;
		padding-bottom: 40px;
	}
		
}

@media screen and (max-width: 1450px) {
	.main .item3 {
		margin-top: 165px;
	}
	
	.main .item3 .item3_list li {
		height: 330px;
	}
	
}

@media screen and (max-width: 1250px) {
	.main .item1 .item1_list li {
		width: calc((100% - 60px) / 4);
	}
	
	.main .item3 .item3_list li {
		width: calc((100% - 60px) / 4);
		height: 300px;
	}
	
	.main .item3 .item3_list li .pic {
		width: 140px;
		height: 140px;
		margin-top: 60px;
	}
	
}

@media screen and (max-width: 550px) {
	
	.main .item1 {
		padding-top: 0px;
		height: 700px;
	}
	
	.main .item1 h4.title {
		margin-bottom: 20px;
	}
	
	.main .item1 .item1_list {
		flex-flow: row wrap;
		box-sizing: border-box;
		padding: 0 10px;
	}
	
	.main .item1 .item1_list li {
		width: calc((100% - 30px) / 2);
	}
	
	.main .item1 .item1_list li p {
		font-size: 16px;
		line-height: 54px;
	}
	
	.main .item2 .item2_list li {
		width: 100%;
		height: 180px;
		line-height: 180px;
	}
	
	.main .item2 .item2_list li.case_more {
		display: none;
	}
	
	.main .item2 .item2_list li a {
		font-size: 22px;
	}
	
	.main .item3 {
		margin-top: 0px;
		padding-top: 20px;
		height: auto;
	}
	
	.main .item3 .item3_list {
		flex-flow: row wrap;
		box-sizing: border-box;
		padding: 0 10px;
	}
	
	.main .item3 .item3_list li {
		width: calc((100% - 10px) / 2);
		margin-bottom: 10px;
		height: 240px;
	}
	
	.main .item3 .item3_list li .pic {
		width: 100px;
		height: 100px;
		margin-top: 40px;
	}
	
	.main .item4 {
		background-position: center center;
	}
	
	.main .item4 .txt {
		width: 100%;
		box-sizing: border-box;
		padding: 0 10px;
		margin-top: 100px;
		background-color: rgba(255,255,255,.7);
	}
	
	.main .item4 .txt h4.title {
		font-size: 30px;
	}
}