WooCommerce product image size too small for Twenty Seventeen full-width page.

I changed the WooCommerce pages in the Twenty Seventeen theme to full-width using a full-width page template and the CSS in this post:
https://www.ads-software.com/support/topic/full-width-woocommerce-pages-in-twenty-seventeen/#post-9996171
Now I have the problem that the product image size is too small for the available space. A large image is loading but it is scaled down. I would like the image to fill the available width without height restriction. The CSS for the image looks correct:

.woocommerce img, .woocommerce-page img {
    height: auto;
    max-width: 100%;

This appears to be the problem, but I don’t know where or how to change it.

img[Attributes Style] {
    width: 350px;
    height: 271px;
}

The page I need help with: [log in to see the link]