Centering element in responsive

Hi, I have an issue when I was trying to centering div element.

So right now I'm trying to centering a div in responsive mode. I use margin: auto but it does't work. The margin is not start from the edge of my screen, see this pic

How to fix this? I want the margin start from the edge of my screen..

If you want to see it directly from the sites, see at the Top products section here

Thank you