.banner {
	width: 100%;
}

.banner img {
	display: block;
	width: 100%;
}

.main .item1 {
	background-image: url(../images/about_p1.jpg);
	background-repeat: no-repeat;
	background-position: left center;
	height: 740px;
}

.main .item1 .txt {
	width: 740px;
	padding-top: 135px;
}

.main .item1 .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 .item1 .txt .about_summary p {
	font-family: pingfangr;
	font-size: 14px;
	color: #808080;
	line-height: 35px;
}

.main .item2 {
	padding-top: 80px;
	padding-bottom: 100px;
	background-color: #f5f5f5;
}

.main .item2 h4.title {
	font-family: pingfangm;
	font-size: 40px;
	color: #231815;
	text-align: center;
	line-height: 80px;
	background-image: url(../images/index_title_bg.png);
	background-repeat: no-repeat;
	background-position: bottom center;
	font-weight: 500;
	margin-bottom: 40px;
}

.main .item2 .item2_content .l,
.main .item2 .item2_content .r {
	width: 50%;
}

.main .item2 .item2_content .l>div {
	display: flex;
	flex-flow: row nowrap;
	justify-content: space-between;
}

.main .item2 .item2_content .l .pic,
.main .item2 .item2_content .l .txt {
	width: 50%;
}

.main .item2 .item2_content .l .pic img {
	display: block;
	width: 100%;
}

.main .item2 .item2_content .l .txt {
	box-sizing: border-box;
	padding-left: 50px;
	padding-right: 50px;
	background-color: #FFFFFF;
	padding-top: 25px;
}

.main .item2 .item2_content .l .txt h4 {
	font-family: pingfangm;
	font-size: 22px;
	font-weight: 500;
	color: #333333;
	line-height: 52px;
	background-image: url(../images/about_title_bg.png);
	background-repeat: no-repeat;
	background-position: left bottom;
}

.main .item2 .item2_content .l .txt .article {
	margin-top: 13px;
}

.main .item2 .item2_content .l .txt .article p {
	font-family: pingfangr;
	font-size: 14px;
	color: #808080;
	line-height: 28px;
}

.main .item2 .item2_content .l>div:nth-of-type(2) .txt {
	background-color: #009fe8;
}

.main .item2 .item2_content .l>div:nth-of-type(2) .txt h4 {
	background-image: url(../images/about_title_wbg.png);
}

.main .item2 .item2_content .l>div:nth-of-type(2) .txt h4,
.main .item2 .item2_content .l>div:nth-of-type(2) .txt p {
	color: #FFFFFF;
}

.main .item2 .item2_content .r .txt {
	box-sizing: border-box;
	padding-left: 220px;
	padding-top: 97px;
	background-color: #FFFFFF;
	height: 350px;
	background-image: url(../images/wenhua_i2.png);
	background-repeat: no-repeat;
	background-position: left 75px center;
}

.main .item2 .item2_content .r .txt h4 {
	font-family: pingfangm;
	font-size: 22px;
	font-weight: 500;
	color: #333333;
	line-height: 52px;
	background-image: url(../images/about_title_bg.png);
	background-repeat: no-repeat;
	background-position: left bottom;
}

.main .item2 .item2_content .r .txt .article {
	margin-top: 13px;
}

.main .item2 .item2_content .r .txt .article p {
	font-family: pingfangr;
	font-size: 14px;
	color: #808080;
	line-height: 28px;
}

.main .item2 .item2_content .r>div:nth-of-type(1) .txt {
	background-color: #009fe8;
	background-image: url(../images/wenhua_i1.png);
}

.main .item2 .item2_content .r>div:nth-of-type(1) .txt h4 {
	color: #FFFFFF;
	background-image: url(../images/about_title_wbg.png);
}

.main .item2 .item2_content .r>div:nth-of-type(1) .txt .article p {
	color: #FFFFFF;
}

.main .item3 {
	padding-top: 80px;
	padding-bottom: 100px;
}

.main .item3 h4.title {
	font-family: pingfangm;
	font-size: 40px;
	color: #231815;
	font-weight: 500;
	text-align: center;
	line-height: 80px;
	background-image: url(../images/index_title_bg.png);
	background-repeat: no-repeat;
	background-position: bottom center;
	margin-bottom: 40px;
}

.main .item3 .item3_list {
	position: relative;
}

.main .item3 .item3_list .swiper-slide img {
	display: block;
	width: 100%;
}

.main .item3 .item3_list .swiper-slide p {
	font-family: pingfangr;
	font-size: 16px;
	color: #333333;
	line-height: 56px;
	text-align: center;
}

.main .item3 .item3_list .swiper-button-next,
.main .item3 .item3_list .swiper-button-prev {
	top: 40%;
	width: 45px;
	height: 45px;
	border-radius: 50%;
	border: 1px solid #e7e7e7;
	background-size: 10px 15px;
}

.main .item3 .item3_list .swiper-button-next {
	right: -75px;
}

.main .item3 .item3_list .swiper-button-prev {
	left: -75px;
}

@media screen and (max-width: 1730px ) {
	.main .item1 .txt {
		background-color: #FFFFFF;
		box-sizing: border-box;
		padding-left: 20px;
		padding-bottom: 40px;
	}
			
}

@media screen and (max-width: 1450px) {
	.main .item2 .item2_content .r .txt {
		height: 300px;
	}
}

@media screen and (max-width: 1250px) {
	.main .item2 .item2_content .l .txt {
	    padding-left: 20px;
	    padding-right: 20px;
	    padding-top: 15px;
	}
	
	.main .item2 .item2_content .r .txt {
		height: 250px;
		padding-top: 25px;
	}
}

@media screen and (max-width: 550px) {
	
	.banner img {
        width: 150%;
        margin-left: -30%;
    }
	
	.main .item1  {
		background-position: center center;
		height: auto;
	}
	
	.main .item1 .txt {
		width: 100%;
		box-sizing: border-box;
		padding: 0 10px;
		margin-top: 0px;
		background-color: rgba(255,255,255,.7);
	}
	
	.main .item1 .txt h4.title {
		font-size: 34px;
	}
	
	.main .item2 {
		padding-top: 0px;
		padding-bottom: 0px;
	}
	
	.main .item2 h4.title {
		font-size: 34px;
	}
	
	.main .item2 .item2_content .l,
	.main .item2 .item2_content .r {
		width: 100%;
		float: none;
	}
	
	.main .item2 .item2_content .l>div {
		flex-flow: row wrap;
	}
	
	.main .item2 .item2_content .l .pic, .main .item2 .item2_content .l .txt {
		width: 100%;
	}
	
	.main .item2 .item2_content .l .txt {
		padding-top: 10px;
		padding-left: 10px;
		padding-right: 10px;
		height: 200px;
	}
	
	.main .item2 .item2_content .l .txt h4 {
		line-height: 44px;
	}
	
	.main .item2 .item2_content .l .txt .article {
		margin-top: 5px;
	}
	
	.main .item2 .item2_content .l .txt .article p {
		font-size: 12px;
		line-height: 20px;
	}
	
	.main .item2 .item2_content .r .txt {
		padding-left: 125px;
		background-position: left 30px center;
		height: 300px;
	}
	
	.main .item3 {
		padding-top: 0px;
		padding-bottom: 20px;
	}
	
	.main .item3 h4.title {
		font-size: 34px;
	}
	
	.main .item3 .item3_list .swiper-slide img {
		width: 80%;
		margin: 0 auto;
	}
	
}