.about_title{font-size:38px;color:#333;text-align:center;margin-bottom:50px;}
.abox1{line-height:40px;color:#666;font-size:20px;margin-bottom:110px;margin-top:140px}
.abox2{font-size:20px;color:#666;text-align:center;}
.abox3{margin-top:100px}
.abox3 .list .item{width:48%;border-radius:10px;background:#343434;padding:40px;box-sizing:border-box;margin-bottom:20px;}
.abox3 .list .item a{display:flex;align-items:center;}
.abox3 .list .item:nth-child(2n - 1){float:left;}
.abox3 .list .item:nth-child(2n){float:right;}
.abox3 .list .item .icon{width:140px;height:140px;}
.abox3 .list .item .info{width:calc(100% - 140px);padding-left:15px;}
.abox3 .list .item .info h3{font-size:28px;color:#fff;font-weight:bold;margin-bottom:15px;}
.abox3 .list .item .info div{font-size:16px;color:#fff;line-height:20px;}
/*  */
.abox4{margin-top:100px}
.abox4 .hd{max-width:860px;margin:0 auto;}
.abox4 .hd ul{display:flex;flex-wrap:wrap;}
.abox4 .hd ul li{padding:0 30px;line-height:45px;margin-right:10px;text-align:center;border:1px solid #666666;margin-bottom:10px;cursor: pointer;font-size:16px;color:#666;}
.abox4 .hd ul li.on,.abox4 .hd ul li:hover{background:#81D8D0;color:#fff;border-color:#81D8D0;}
.abox4 .bd{margin-top:30px;}
.abox4 .bd li{text-align:center;width:31%;float:left;box-sizing:border-box;margin-right:3.5%;margin-bottom:20px;}
.abox4 .bd li .img{height:280px;border:1px solid #666;line-height:260px;padding:10px;}
.abox4 .bd li img{max-height:100%;}
.abox4 .bd li .title{height:50px;line-height:50px;font-size:16px;}
@media (min-width:1200px){
    .abox4 .bd li:nth-child(3n){margin-right:0;}
}
@media (max-width:767px){
    .abox1{padding:30px 15px;margin:0;font-size:14px;line-height:25px;}
    .about_title{font-size:18px;margin-bottom:15px;}
    .abox2{}
    /*  */
    .abox2{padding:30px 15px;font-size:14px;}
    /*  */
    .abox3{padding:30px 15px;margin:0;}
    .abox3 .list .item{width:100%;padding:15px;}
    /*  */
    .abox3 .list .item .icon{width:70px;height:70px;}
    .abox3 .list .item .info{width:calc(100% - 70px)}
    .abox3 .list .item .info h3{font-size:16px;}
    .abox3 .list .item .info div{font-size:12px;}
    /*  */
    .abox4{padding:0;margin:0;}
    .abox4 .hd ul{justify-content: space-between;}
    .abox4 .hd ul li{width:49%;padding:0 5px;font-size:12px;margin-right:0;}
    .abox4 .bd li{width:48%;margin-right:0;height:150px;line-height:130px;padding:10px;margin-bottom:50px;}
    .abox4 .bd ul{display:flex;flex-wrap:wrap;justify-content: space-between;}
    .abox4 .bd li .img{height:100%;line-height:115px;}
    .abox4 .bd li .title{height:40px;line-height:40px;overflow:hidden;text-overflow: ellipsis;white-space: nowrap;margin:15px 0;}
    /*  */
}
@media (min-width:768px) and (max-width:991px){
    .abox1{margin-top:20px;}
    /*  */
    .abox3 .list .item{padding:20px;}
    .abox3 .list .item .icon{width:100px;height:100px;}
    .abox3 .list .item .info{width:calc(100% - 100px)}
    /*  */
    .abox4 .bd li:nth-child(3n){margin-right:0;}
}