Bootstrap indent appears?

Question

css

When viewed with the resolution of mobile devices, this is the indent from the right.
I don’t see styles that would give an indent, the blocks don’t seem to climb out.

Answer 1

I don't see styles.

Me too. I don't see any markup at all. We need to call psychics.

Answer 2

Wang on the incorrect use of the .row and .col bundle

Answer 3

15px padding on the sides of the container. It's always been that way. To prevent blocks from sticking to the sides