.part-color{
    padding-right: 2px;
    padding-left: 2px;
}
.part-color .item-box-image{
    width: 100%;
    height: auto;
    margin:0;
}  
    .part-color .part-item-box{
    padding: 0;
}
    .part-color-content{
        height: 0px;padding-bottom: 100%;
    }