CSS problem – setting the margin on one page affects the other

Hi guys

I am currently putting together a website using Woocommerce and Alaska theme, trying to center align all of the products and playing around with the margin-left can help me achieve perfect positioning on one page which shows the products, but unfortunately hinders the positioning and sizing of the ‘related products’ section on the product page as they fall under the same class.

Any way I can solve this?

https://www.coffeemattersint.com/our-tea

https://www.coffeemattersint.com/product/big-breakfast-tea/

Thanks in advance!

Oliver