I want to duplicate a container but all elements inside that container are linked with the original container. Changes made to elements inside the duplicated container affect the original container elements. How to avoid this problem?
Linked with… do you mean shares the same classes in the top right corner?
If you want to style container A and container B differently they need different classes, and how you do that depends on your design goals.
At the simplest, you can click the arrow next to a style, duplicate it, rename it, and change those styles on your new class, but before you go far with this I’d recommend reading up on the Webflow U courses esp regarding the styling system.