Looks different on Safari and Chrome

Hi there

Try to take a look on my page https://hotyogalife.prohjemmesider.dk/yoga-priser/
Where i have used your table to build a product price info table. On chrome it looks exactly how i want it, but when i visit from fx Safari, the thin line under the Headline jumps on the top of the headline instead.

Hope you can help me, on chrome it looks really great ??

Thanks, Peter