.main-page{margin:0 auto;width:100%;}
.main-page .left{padding-right:10px;border-right: 1px #fff solid; }
.main-page .left, .main-page .right{float:left;}
.main-page .list-back{height:300px;}
.main-page .list{position:relative;margin-top:-300px;width:220px;height: 450px;text-align:center;font-size:18px;font-family:"微软雅黑";color:#1b1b1b;}
.main-page .list div{height:50px;line-height:55px; margin-bottom: 8px; border-radius: 2px; cursor: pointer;border-bottom: 1px dashed #cccbcb;}
.main-page .list div.on{background:#1857a4;color:#fff; }
.main-page .right{ width: 82.5%; height: 560px;}
.main-page .content{position:relative; width:100%; height:100%; overflow:hidden;}
.main-page .content .con-ggh{ width:100%; height:100%;}
.con-ggh li{float:left;width: 360px;height: 277px;    overflow: hidden;}
.con-ggh-img{width:339px;height:262px;display: table;margin: 0px auto;}
.con-ggh-img-img{width:100%;}

h3 {
    font-size: 20px;
    margin: 5px 0 10px;
}
.btn{display: inline-block; font-size: 14px; color: #fff; text-decoration: none; transition: 0.4s;}
.btn:hover{background-color: transparent; color: #4d92d9; transition: 0.4s;}
.text-desc{position: absolute; left: 0; top: 0; background-color: #fff; height: 100%; opacity: 0; width: 100%; padding: 20px;}
.port-1.effect-3 .text-desc{top: 50%; left: 50%; width: 0; height: 0; overflow: hidden; padding: 0;}
.port-1.effect-3:hover .text-desc{width: 100%; top: 0; left: 0; height: 100%; padding: 45px 0px;}
.port-1 {float: left;width: 100%;height: 262px; position: relative;overflow: hidden; text-align: center;}
.port-1.effect-3 .text-desc { top: 50%; left: 50%; width: 0; height: 0;overflow: hidden; padding: 0;}
.port-1 .text-desc {opacity: 0.8; top: -100%; transition: 0.5s;color: #fff;padding: 45px 20px 20px;}
.text-desc {position: absolute; left: 0; top: 0; background: rgba(0,0,0,.5); height: 100%;opacity: 0; width: 100%;padding: 20px;}
.text-desc-p{line-height: 30px; text-indent: 2em;text-align: left; width: 95%;margin: 0 auto;font-size: 14.5px;}
.btn { display: inline-block;font-size: 14px; color: #fff;text-decoration: none; transition: 0.4s;}