hmm I can come up with a few things:
1) try adding color and thickness: i.e.
#asset-index-desc .container
div
li
:border 1px dashed red !important
2) I assume that the code you provided is not the same as it appears in your document, otherwise you would get a Sass error saying that the div tag is too deeply nested .... :)
3) the following does NOT work in my own application,
div
li
border: 1px dashed red !important
BUT, if I remove the div tag, then all this is good:
li
border: 1px dashed red !important
Hope this helps .....
... . ....