Hello! Looking at the Luban UI it seemed strange to me that a Serif font was used all over the place.
Looking in the code throught devtools, it seems to me the font is specified incorrectly, with the single quotes wrapping all the fonts instead of only the Helvetica Neue:
font-family: 'Roboto, Helvetica Neue';
font-family: 'Roboto', 'Helvetica Neue';
Is it possible this is just a CSS bug and may be corrected in a future release?
A screen with the (I think) correct font: