Creating two separated sections in WordPress

I’m trying to create two separated sections in wordpress. Every section with it’s own URLs. For example:

For section 1:

http://domain/section-1/page1/
http://domain/section-1/page2/
....
http://domain/section-1/pageX/

For section 2:

http://domain/section-2/page1/
http://domain/section-2/page2/
....
http://domain/section-2/pageX/

Templates would be differents and pages too.

How this can be treated with wordpress ?