Intro section with dropdown navigation using grid, flex, js, jQuery

Well, I think I still have some work to do with this task. First I need a good advice or a good reading / tutorial on using using svg. I don't get how to include svg in a better way: should it be inline or not. Then I still have some issues with grids, have some difficulties aligning clients section on bigger screens. And also I would like something more elegant then jquery :)))