Sumitomo Forestry Style Design System (DESIGN.md, Japanese UI)

Design policy: Express a brand identity rooted in natural materials (wood, forests) through forest green and Mincho typefaces. A corporate site that balances corporate formality with the warmth of wood - Density: Generous whitespace. A media-rich layout making heavy use of hero visuals, large photographs, and slide-format cards - Keywords: nature, dignity, trust, tradition, sustainable - Characteristics: Three typeface voices — English headings (Roboto), Japanese display (Yu Mincho), body (Yu Gothic). Forest green #008d54 deployed throughout as the brand color