.ly_product_purchase_3 .goods_box .goods_menu { float: left; position: sticky; top: 0px;}
    .ly_product_purchase_3 .goods_wrapper { margin-left: 30px;  float: right;}
    @media screen and (max-width: 1000px) { 
        .ly_product_purchase_3 .goods_wrapper { margin-left: 0px;  }
    }