More customisation on CCS?

Hello, sorry it’s me again.

Last time you teach me to remove the stuff to achieve a simplest “blog” page

Can I regain those stuff for another particular page, while keeping the simplest “blog” page format?

It is possible, however, it is not as easy as to get it removed completely. It’s certainly not quality under “free support”.

I know it’s difficult, all I need to some hints how to achieve it. I will figure it out.

Is it some sort of second style.CSS?

You can use WordPress Child Theme to make changes, however it will still apply to the entire website not just one page.

You need to style everything based on Page Templates or more specifically based on Post/Page ID.

Which would look something like this:

#post-134 .entry-title {
    background: #111;