Why does layout fail in Bitrix?

Question

1C-Bitrix

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For some reason, the layout on the catalog section crashes (search, menu, left menu), the footer is the same story. I’m just learning to link a site to Bitrix, so don’t throw slippers. Where could I have made a mistake, or what else can you provide to help me solve the problem?

Answer 1

In general, the bottom line is that the bootstrap was connected, the path to which changed to the path that I showed on the screen from imgur. It was necessary to turn off the connection of the catalog itself in the files themselves and in the paths below, that is, products and sections.

Answer 2

Most often, layout problems are associated with the connection of all sorts of global styles. Bootstraps, libraries from beginners - all this declares classes and does not particularly think about the future - it would work, and then whatever you want. Hire people who are familiar with, for example, BEM or something like that.
Of course, they are special people, they like to be smart and leave smart phrases. But after talking with him for 15 minutes, you can understand - is it easy for him, or did he just read an article on how to typeset on bam