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

Design policy: Serene and gallery-like. Making whitespace the protagonist, the UI is reduced to the absolute minimum so that product photography and the shadows of the light stand out - Density: A relaxed, low-density layout. The first view consists only of a large visual plus a few labels - Keywords: Minimal / refined / hard-edged / quiet / editorial - Shape language: No rounded corners whatsoever (border-radius: 0). Buttons are not filled but thin-ruled outlines. Composed of straight lines and right angles - Typeface character: A Western grotesque (Neue Haas Grotesk) takes the lead, with hea