.ry,.xgzs{
    width: 1200px;
    height: auto;
    margin: 0px auto;
    overflow: hidden;
}
.ry img{
    width: 380px;
    height: 283px;
    float: left;
    margin: 0px 30px 30px 0px;
}
.ry img:nth-child(3),.ry img:nth-child(6){
    margin-right: 0px;
}
.xgzs{
    height: 646px !important;
}
.xgzs li img{
    width: 228px;
    height: 313px;
    margin-right: 10px;
    margin-bottom: 10px;
    cursor: pointer;
}
.xgzs li img:nth-child(5),.xgzs li img:nth-child(10),.xgzs li img:nth-child(15){
    margin-right: 0px;
}

.zsfd{
    width: 100%;
    height: 100%;
    position: fixed;
    top:0px;
    left: 0px;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    display: none;
}
.zsfd_con{
    width: 1300px;
    height: auto;
    margin: 154px auto;
    overflow: hidden;
    text-align: center;
    position: relative;
}
.upDown{
    text-align: center;
    margin-top: 10px;
}
.upDown img{
    width: 25px;
    height: 15px;
    cursor: pointer;
}
.upDown .up{
    display: none;
}