How to remove links to blog posts?

Question

Blogs

I've looked all over the internet and can't find an answer to my problem.
First, a blog question. There is a multi-page site with different information and a background in the form of an image. There, the message is in blocks so that it can be seen. But it took a blog. Everything is fine on the main page of blog posts, you can set a white block there so that the post is visible, but when you go to the post itself, everything appears on top of the backgrounda directly (that is, no text is visible, only the attached image is visible) (see Fig. 1 ). How can I make a background for posts so that I don’t constantly expose it and change the rest of the site’s pages, or how can I remove the transition to posts altogether and leave only the display on the main page, since this is quite enough? The white font style is made only for this element of this page, that is, it will need to be changed constantly