.big_banner{height:550px;background:url(./images/banner.png) no-repeat center top}.block_1{max-width:1200px;margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px;text-align:left}.block_1 h2.title_img{margin-top:70px;height:114px;background:url(./images/title.png) no-repeat bottom left}.block_1 h2{color:#393a3f;margin-top:70px}.block_1 p{line-height:1.79;padding-top:30px}.block_1 img.img_center{width:100%;margin:30px 0 70px}.block_1 ul{margin:60px 0 140px;overflow:hidden}.block_1 ul li{float:left;width:30%;overflow:hidden}.block_1 ul li+li,.community ul li+li{margin-left:5%}.block_1 ul .img{width:27.7%;height:60px;background:no-repeat left center}.block_1 ul .img_fly{background-image:url(./images/fly.png)}.block_1 ul .img_data{background-image:url(./images/note.png)}.block_1 ul .img_line{background-image:url(./images/data.png)}.block_1 ul p{width:72.3%;max-width:238px;padding-top:0;float:left}.block_1 ul .img{float:left}.community{background-color:#f9f9fb;padding:70px 0}.case,.community .center{max-width:1200px;margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px}.block_1 h2,.case h2,.community h2{line-height:1.429;font-weight:600}.community h2{color:#393a3f}.community ul{margin-top:60px;overflow:hidden}.community ul li,.community ul p{-webkit-transition:all .2s ease-out;transition:all .2s ease-out}.community ul li{float:left;width:30%;text-align:center;background-color:#fff;color:#000}.community ul li:hover{background-color:#2051d1;-webkit-box-shadow:0 20px 27px 0 rgba(32,81,209,.45);box-shadow:0 20px 27px 0 rgba(32,81,209,.45);color:#fff}.community ul li:hover p{color:#fff}.community ul i{display:block;margin-top:50px;font-size:54px}.community ul h3{margin-top:30px}.community ul .line{width:36px;border-bottom:4px solid;margin:10px auto 0}.community ul p{padding:30px 0;line-height:1.79;color:#92979e}.community li{height:400px}.community li i{margin-top:100px}.case{color:#000}.case h2{margin-top:140px}.case li{margin:30px 0 100px;overflow:hidden}.case li>div{float:left;width:48%}.case li>div+div{margin-left:4%}.case li h3,.community ul h3{line-height:1.4;font-weight:600}.case li p{margin-top:30px;line-height:1.79;color:#92969e}.case li img{width:100%}.case li .case_lg_h{display:none}