Teaser text at main page without any style

Unless you provide a link to a page demonstrating the problem, no one will be able to offer much in the way of assistance. In the meantime, can you replicate the problem using the default Twenty Thirteen theme with all plugins deactivated?

I have same problem without plugins at my own them.

https://polishthehunter.pl/

Can you replicate the problem using the default Twenty Thirteen theme?

I replicated it and its look like this:
Twenty Thirteen

Its what I mean but how can I do that in my theme?

Can we see the site using the default Twenty Thirteen theme?

Now you can see it.

I can’t see any obvious problem on the site now.

Yes, but I want to know how I can make a Teaser formatted like in Twenty Thirteen

Try examining the content.php template file within the 2013 theme. This approach is often the best way to learn,.

Ok that is what I needed. Thanks for file name. I wile study this two templates. For this moments its all. Thank you very much!