#add this code in responsive css
@media only screen and (max-width: 767px) {
/*CART THUMBNAIL FIX*/
	.woocommerce-cart input#coupon_code {
	    min-width: 50% !important;
	    margin-bottom: 2%;
	}
	.woocommerce-cart td.product-thumbnail {
	    display: block !important;
	}
	
	.woocommerce-cart td.product-thumbnail:before {
	    display: none;
	}
	.woocommerce-cart td.product-thumbnail a img {
	    display: block;
	    width: 45px !important;
	}
}
				