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

Design policy: A clean, professional design that balances the trustworthiness and innovativeness of an automaker. The structure makes vehicle model information the star - Density: Vehicle introduction pages use a spacious, visual-first layout. Notices and navigation have high information density - Keywords: Trust, innovative, clean, professional, Japanese quality - Characteristics: An Apple-leaning approach that places SF Pro at the head of the font-family. Text color uses #222222 rather than pure black, ensuring a softer impression. letter-spacing: 0.04em is applied globally