SIMPLE FIX on RESPONSIVE

I need a simple fix on my website responsive.

On the Home page, where there are all the images, the height of the boxes are set to 320px, I need the height of these boxes become automatic, so that resolution independent and they can decrease proportionately so that errors will not happen, leaving a black border between them depending on the resolution.

However, when I change the css element's height to "auto" then all images disappear.

I need it ASAP.

this is the site.

[url removed, login to view]

CSS HTML5 JavaScript jQuery / Prototype Node.js

Project ID: #5487121

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