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

Design policy: A design that foregrounds the reliability and functionality of a B2B industrial equipment manufacturer. Design token management via CSS Custom Properties, with a solid structure that positions red as the accent color - Density: A high-information-density B2B site with product cards, banners, and topics packed closely together - Keywords: Technical, reliable, highly functional, red accent, B2B professional