Smaller Media Screens

Have been trying to create media queries for screen sizes smaller than 900px but not having any luck. The images do not resize and there isn’t a way to make the excerpt disappear.

Have tried options along the lines of: (entered into the css code in plugin editor)

@media (max-width: 890px){ .rpwe-post-excerpt { display: none; } /* remove excerpts */ #site #site-wrap div.rpwe-widget li img { width: 50px; height: auto; } /* resize image */ }

Any suggestions?

The page I need help with: [log in to see the link]