body{background: beige;}
.content{
    width: 1170px;
    margin: 20px auto;
}
.list{
    width: 100%;
    -moz-column-count: 3;
    -webkit-column-count: 3;
    column-count: 3;
    -moz-column-gap: 30px;
    -webkit-column-gap: 30px;
    column-gap: 30px;
}
.list-item{
    margin-bottom: 30px;
}
.item-img{
}
.item-img img{width: 100%;}