First we will apply the css for both the accordion and the drop down, we will put the accordion styles in the global.css stylesheet in your subtheme, and the dropdown styles in yoursubtheme-alpha-default.css file. In my case the menu block has an id of #block-menu-menu-accordion, so replace that id with your own menu block id.

This module provides several Panels layouts that display correctly on mobile devices.

The initial release includes over 50 different layouts for a 12 column 960 grid theme. All of the panel panes have grid classes assigned to work with the popular Omega Theme but not limited to Omega as long as other themes recognize the grid classes.