From b777a03857cba6322929e3f11a4bb14d0338d160 Mon Sep 17 00:00:00 2001
From: Yan Zhu column class inside the container. These columns will take up the space equally.
You can specific the width of each column by adding class col-<1-12>.
And you can add the col-gapless class to the columns to have gapless columns.