Three deliberate choices, then feed the design into the codebase itself.
Design is not decoration, it is choices: one font pairing, one palette, one layout skeleton. You will generate three genuinely different directions with AI, pick one like a founder, and then do the move most people miss: feed the chosen direction back into Kimi Code so your live product actually adopts it.
Products that feel good are chosen on purpose. A design system means every new feature you build this week automatically looks like YOUR product, not a template.