Recalling the lesson: Nested columns will be more padding can be used in a nested case further
Column offset Scene:
By default, all close to the left side of the box, the box can only be offset with the right
Realization of ideas replaced
Big box row
Nested columns col- two small box representing the size of several col-md-3 (example)
A container to the next row 8 column col
div.container> div.row> div.col-sm (size) * 8 and the last column col-sm-offset-2 (several) can
Offset = 12- parts (two) parts box
In fact, inside the browser to offset the calculated margins, margin-left of the left side of the box plus
