.container{
    min-height: calc(100vh - 18.23vw - 230px);
}


/*内容部分*/
.content{
    overflow: hidden;
    /*border-top: 1px solid #eee;*/
    border-left: 1px solid #eee;
}

@media screen and (max-width: 1260px){
    .content{
        width: calc(100% - 30px);
        margin: 15px auto
    }
}

.content_li{
    border-right:1px solid #eee;
    border-bottom:1px solid #eee;
    float: left;
    padding: 16px 0!important;
    box-sizing: border-box;
}

.content_item{
    width:264px;
    margin:0 auto;
    cursor: pointer;
}

.content_item_img{
    width: 100%;
    height: 200px;
    position: relative;
}

.content_item_img_img{
    width: 100%;
    height: 100%;
}

.content_item_img_mask{
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.63);
    opacity: 0;
    transition: all 0.8s;
}

.content_item_img:hover .content_item_img_mask{
    opacity: 1;
}

.content_item_img_mask_img{
    width: 40px;
    height: 40px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    cursor: pointer;
}

.content_item_bottom{
    width:100%;
    padding: 30px 10px 0;
    box-sizing: border-box;
}

.li_title{
    text-align: center;
    font-size: 18px;
    font-family: MicrosoftYaHei;
    color: #212121;
    line-height: 24px;
    letter-spacing: 1px;
}

.li_content{
    margin-top: 7px;
    text-align: center;
    font-size: 12px;
    font-family: PingFangSC-Light, PingFang SC;
    font-weight: 300;
    color: #616161;
    line-height: 20px;

}

.look_more{
    margin: 12px auto 0;
    width: 100px;
    height: 32px;
    border: 1px solid #979797;
    text-align: center;
    line-height: 32px;
    font-size: 12px;
    font-family: MicrosoftYaHei;
    color: #616161;
    transition: all 0.8s;
    cursor: pointer;
}

.look_more:hover{
    background: #616161;
    color: #ffffff
}

.content_item:hover .content_item_img_mask{
    opacity: 1;
}

.content_item:hover .look_more{
    background: #616161;
    color: #ffffff
}

@media screen and (max-width: 1200px) and (min-width: 992px){
    .content_item{
        width: 200px;
    }

    .content_item_img{
        width: 200px;
        height: 150px;
    }
}

@media screen and (max-width: 992px) and (min-width: 768px){
    .content_item{
        width: 200px;
    }

    .content_item_img{
        width: 200px;
        height: 150px;
    }
}

@media screen and (max-width: 767px){
    .nav{
        height: 60px;
    }

    .navigation{
        padding:0 15px;
        box-sizing: border-box;
    }

    .content_item{
        width: 220px;
    }

    .content_item_img{
        width: 220px;
        height: 164px;
    }
}