ROYCE' Style Design System (DESIGN.md, Japanese UI)

Design policy: A refined and calm tone befitting a premium chocolate brand from Hokkaido. Navy blue is established as the brand color, with decorative English script fonts used to create elegance - Density: As an e-commerce site, product listings have high information density, but brand pages emphasize visuals with generous use of whitespace - Keywords: Elegant, classical, navy, Hokkaido, gifts