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

Design policy: As a comprehensive manufacturer of housing equipment, the site employs a practical and trustworthy information architecture that makes it easy for consumers to find products. The warm cream background (#f9f7f1) creates a showroom-like warmth, while the LIXIL Orange (#ef7a00) accent guides users at key points. A corporate site that minimizes decoration and prioritizes clarity of product information and navigation - Density: A portal-style layout with high information density, including product categories, construction examples, showroom information, and news. Information is organ