Bootstrap page layout 6-BS converts an existing fixed-width layout to a responsive Layout

First-mover import file bootstrap-responsive.css

<Link href = "Bootstrap/CSS/bootstrap-responsive.css" rel = "stylesheet">

Bootstrap-responsive.css this style sheet has made a corresponding responsive design for our commonly used online devices:

For example:

On a screen with a resolution width greater than 1200 pixels, the width of the grid changes from 60px to 70px, and the distance between the grid and the grid changes from 20px to 30px.

In the vertical status of a tablet, the width of each grid changes from 60px to 42px by default;

If the screen is a little smaller, the grid width will change to the "Flowing" width, and the elements of the grid class will be stacked together.