.img100{ width:100%;}
.clearfix:after,.clear:before{display:table;content:'';}
.clearfix:after{clear:both;overflow:hidden;}
.clearfix{zoom:1;}
.re{position:relative;}
.ab{position:absolute;}


.tit{text-align:center;margin:72px auto;}
.tit h1{font-size:36px;color:#1d42aa;font-weight: normal;}
.tit i{width:112px;height:3px;background-color:#777777;display: block;margin: 12px auto 0;}

.box1 .box1_l{float:left;width:472px;}
.box1 .box1_r{float:right;width:688px;}
.box1 .box1_r h2{font-size:26px;color:#1d42aa;padding:10px 0;}
.box1 .box1_r p{font-size:20px;color:#333333;line-height:34px;}
.box1 .box1_r p:nth-of-type(1){margin-bottom:30px;}

.box2{}

.box3 ul li{width:24.25%;float:left;margin-right:1%;background-color:#efefef;text-align: center;height: 420px;} 
.box3 ul li:nth-of-type(4){margin-right:0}
.box3 ul li span{font-size:20px;color:#0042ff;display: inline-block;padding: 6px 17px;border: 1px solid #0042ff;margin: 24px 0;}
.box3 ul li p{font-size:20px;color:#666666;padding: 0 37px;line-height: 32px;}

.box4_con .case_tab{text-align:center;    margin: 1% auto 3%;}
.box4_con{width:96%;overflow: hidden; margin: 0% auto 1%;}
.box4_con .hd  li{float:left;width: 24.2%;margin-right:1%;background-color: #424041;position: relative;}
.box4_con .hd  li:nth-child(4){margin-right:0;}
.box4_con .hd li h1{font-size:25px;line-height: 2;color:#fff;padding: 3% 0%; }
.box4_con .hd li.active{background-color: #1d42aa;color:#fff;}
.box4_con .hd li:hover{background-color: #1d42aa;color:#fff;}
.box4_txt{background-color: #efefef;} 
.box4_txt p{font-size:25px;color:#595757;line-height:42px;padding:3%;}
.box4_txt p img{width:38px;}