.content{
    width: 1100px;
    margin: 52px auto 60px;
}
.content li{
    float: left;
    width: 355px;
    height: 302px;
    background: #f2f2f2;
    margin-bottom: 18px;
}
.content li:nth-child(3n+2){
    margin: 0 17px;
}
.content li img{
    display: block;
    /* width: 325px; */
    height: 217px;
    margin: 15px auto 0;
    cursor: pointer;
}
.content li p{
    width: 320px;
    color: #202020;
    font-size: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #dfdfdf;
    margin: 18px auto 0;
    text-align: center;
}
.mask{
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .5);
    z-index: 99;
    /* display: none; */
}
.imgMax{
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 800px!important;
    height: auto!important;
    z-index:100;
}