@charset "utf-8";
.introduction_container{
	padding: 60px 0 30px;
	background: #f2f2f2;
}
.banner{
	background: #f2f2f2;
}
.datum_wrapper{
	margin-bottom: 20px;
	overflow: hidden;
    display:flex;
    justify-content:space-between;

}
.datum_wrapper+.datum_wrapper{
    padding-top:35px;
    border-top:1px solid #cccccc;
}
.datum_title h2{
	text-align: center;
	font-size: 30px;
	margin: 0 auto 30px auto;
	line-height: 1.4em;
	color: #333;
	font-weight: normal;
}
.datum_wrapper .datum_list {
    display: inline-block;
    position: relative;
    float: left;
    width: 19.16%;
    height: 83px;
    margin-right: 1.05%;
    background: url(../images/materials/datum_listBg08.png) no-repeat center 0;
    background-size: cover;
    border-radius: 4px;
    overflow: hidden;
}
.datum_wrapper .datum_list:last-of-type{
    margin-right:0;
}
.datum_wrapper.baidu .datum_list a {
    position:absolute;
    top:0;
    bottom:0;
    left:0;
    right:0;
    z-index:10;
}
.datum_wrapper.baidu .datum_list a .baiduLogo{
    display:block;
    margin:10px auto;
}
.datum_wrapper.baidu .datum_list a span{
    display:block;
    text-align:center;
}
.datum_wrapper.baidu .datum_list{
    background:transparent;
}
.datum_wrapper.easy_wrapper .datum_list{
    height:auto;
    background:transparent;
}
.datum_wrapper.easy_wrapper .datum_list img{
    display:block;
    width:100%;
}
.datum_wrapper.easy_wrapper .datum_list a{
    position:absolute;
    top:0;
    bottom:0;
    right:0;
    left:0;
    z-index:10;
    display:flex;
    justify-content:center;
    align-items:center;
}
.datumDescribe {
    text-align: center;
    width: 100%;
    max-width: 665px;
    margin: 0 auto 20px;
    color: #333;
    line-height: 2em;
}
.datum_wrapper .datum_list.datum2{
	background-image: url(../images/materials/datum_listBg02.png);
}
.datum_wrapper .datum_list.datum3{
	background-image: url(../images/materials/datum_listBg03.png);
}
.datum_wrapper .datum_list.datum4{
	background-image: url(../images/materials/datum_listBg04.png);
}
.datum_wrapper .datum_list.datum5{
	background-image: url(../images/materials/datum_listBg05.png);
}
.datum_wrapper .datum_list.datum6 {
    background-image: url(../images/materials/datum_listBg06.png);
}
.datum_wrapper .datum_list.datum7 {
    background-image: url(../images/materials/datum_listBg07.png);
}






.datum_wrapper .datum_list:after{
    margin-right: 0;
}
.datum_wrapper .datum_list a {
    display: block;
    width: 100%;
    height: 100%;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.datum_wrapper .datum_list a:before{
    content:"";
    display:block;
    width:100%;
    height:100%;
    position:absolute;
    left:0;
    top:0;
    background:rgba(51,133,255,.5);
    transition:all ease .4s;
    opacity:0;
    z-index:0;
}
.datum_wrapper .datum_list a:hover:before{
    opacity:1;
}

.datum_wrapper .datum_list a i{
	display: inline-block;
	width: 32px;
	height: 32px;
	vertical-align: middle;
	margin-right: 2px;
    position:relative;
    z-index:10;
}
.datum_wrapper .datum_list a span{
	display: inline-block;
	vertical-align: middle;
	color: #fff;
	    position:relative;
    z-index:10;
}
.datum_wrapper .datum_list.datum1 a i {
    width: 42px;
    background: url(../images/materials/datum_icon01.png) no-repeat center center;
    background-size: 100%;
    margin-right: 5px;
}
.datum_wrapper .datum_list.datum2 a i,
.datum_wrapper .datum_list.datum6 a i,
.datum_wrapper .datum_list.datum7 a i,
.datum_wrapper .datum_list.datum5 a i{
	display: none;
}
.datum_wrapper .datum_list.datum3 a i{
	/*background: url(../images/materials/datum_icon02.png) no-repeat center center;
	margin-right: 5px;*/
    display:none;
   
}
.datum_wrapper .datum_list.datum4 a i{
	background: url(../images/materials/datum_icon03.png) no-repeat center center;
}
.datum_wrapper .datum_list a:after{
	content: "";
    display: inline-block;
    vertical-align: middle;
    height: 100%;
}
ul.performance{
	position: relative;
	text-align: center;
	padding-top:20px ;
}
ul.performance li{
	display: inline-block;
	vertical-align: top;
	width: 25%;
	padding-left: 5%;
}
ul.performance li .performanceImg{
	display: block;
	width: 68px;
	height: 68px;
	margin: 0 auto;
	background: url(../images/materials/nature_icon01.png) no-repeat center center;
}
ul.performance li h3{
	font-size: 20px;
	text-align: center;
	color: #333;
	font-weight: bold;
	margin: 35px auto 20px auto;
}
ul.performance li.list2 .performanceImg{
	background-image: url(../images/materials/nature_icon02.png);
}
ul.performance li.list3 .performanceImg{
	background-image: url(../images/materials/nature_icon03.png);
}
ul.performance li.list4 .performanceImg{
	background-image: url(../images/materials/nature_icon04.png);
}

ul.performance li.list1{
	padding-left: 0;
}
.development_history{
	width: 100%;
	overflow: hidden;
	padding-bottom: 70px;
}
.development_history .development_img{
	display: block;
	margin: 0 auto;
    width:100%;
}
.development_history .development_phone{
	display: none;
	width: 90%;
	margin: 0 auto;
}

html,body,.body_bg{
    height:100%;
}
.introduction_container{
    min-height:calc(100% - 440px);
}



@media  (max-width:1400px ) {
    .datum_wrapper.datum .datum_list{
        width:23.95%;

    }
    .datum_wrapper.datum .datum_list a{
        display:flex;
        justify-content:center;
        align-items:center;
    }
}
@media only screen and (max-width:1200px ) {
	.development_history .development_img{
		width: 160%;
		margin-left: -30%;
	}
}
@media only screen and (max-width:1050px ) {
	.datum_wrapper {
		text-align: center;
	}
	.datum_wrapper .datum_list{
		width: 100%;
		max-width: 230px;
		float: none;
		vertical-align: middle;
		margin-bottom: 20px;
	}
    .datum_wrapper.datum .datum_list{
        width:100%;
    }
}
@media only screen and (max-width:820px ){
	ul.performance li{
		width: 50%;
		margin-bottom: 20px;
	}
	ul.performance li:nth-of-type(2n-1){
		padding-left: 0;
	}
    .datum_wrapper{
        display:block;
    }
}
@media only screen and (max-width:640px ) {
	.datum_title h2{
		font-size: 24px;
	}
	ul.performance li h3{
		font-size: 18px;
	}
	ul.performance li{
		width: 100%;
		padding-left: 0!important;
	}
	.development_history .development_img{
		display: none;
	}
	.development_history .development_phone{
		display: block;
	}
	.development_history{
		padding-bottom: 30px;
	}
}
@media only screen and (max-width:480px ) {
	.development_history .development_phone{
		width: 100%;
	}
	
}