Consistency

Same buttons look identical across all pages. Same information displayed the same way. Inconsistent design confuses users.

Clarity

Users understand within 3 seconds: what this page is, what they can do here, what matters most.

A 益阳 client homepage had 12 function icons in a grid. Users were confused. We reduced to 4 core functions with large text labels. Core function clicks increased 120%, task completion time dropped 35%.

Responsiveness

Every action gets instant feedback. Button press state, loading animation, success toast, clear error message.