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

Design philosophy: Athletic precision. A design that balances the strength of a sports gear manufacturer with the precision of its equipment - Density: Generous whitespace and large visuals. A hero-style layout that makes product photography for badminton, tennis, and golf stand out - Keywords: Powerful, black-based, dual-font, flat, bilingual - Characteristics: - Dual-font system: Oswald (condensed sans-serif) for English headings, and a bilingual typeface design using line-only + BIZ UDGothic for Japanese. The contrast between Japanese and Western type conveys the brand's international chara