freee Style Design System (DESIGN.md, Japanese UI)

Design policy: Friendly, clear business UI. Delivers complex accounting and HR operations through an intuitive, lightweight interface - Density: Medium information density for product UI. Generous whitespace on the corporate site - Keywords: Friendly, clear, trustworthy, simple, accessible - Characteristics: A clean color scheme based on blue. Different font strategies for the product UI (Vibes) and the corporate site