Changing appearance of WooCommerce product layout [closed]

This is indeed something that you need to make a specific page template for. Just CSS won’t do the trick because you need to add a function to your functions.php file (in your theme or child-theme folder) to display the excerpt.

You could do something like this:

add_action( 'wp' , 'add_excerpt', 20);

function add_excerpt() {
    if ( is_shop() || is_product_category() || is_product_tag() ) {
        add_action( 'woocommerce_after_shop_loop_item', 'woocommerce_template_single_excerpt', 5);
    }
}

Which will add the excerpt to the product listings.