different styles

how can I set a different style only on certain pages?
My site is about two different topics and I would like that when I'm in the pages of the first there is the style 1 and 2 in the other pages style.
it's possible?
By the time I made this differentiation between home and the rest of the site, but I have not understand how to create a page and set it to the frontpage or subpages ... there is a guide?

Hi,
yes it's possible.
method #1 You have to create a clone (copy) of current template and assign to different menu items then change used style.
Method #2 It request using custom CSS module... but it request little more work.

method #1 You have to create a clone (copy) of current template and assign to different menu items then change used style.

I try this, but them how can assign the changed used style? From where?

As always from template settings
(check, screenshot is from J2.5 but option is also in j3 version)

no, I'm not explained well ... sorry
I am now on the site and create a new menu ... how do I make sure that the menu items, for example, some articles will be displayed with the style of the second copy of the template and not with the style of the first template where I am now?

Also ... I even think ...
I did not have two copies of the template at this time?
the first is creativity forntpage and the second is creativuty subpages?

I am in creativity subpages there is a way to ensure that an entire menu or individual items are displayed with the style of creativity frontpage?

I miss the logic

By default in Joomla you can assigned is based on menu items.
But there are extensions which extend these capabilities - check on JED