Rakuten Ichiba Style Design System (DESIGN.md, Japanese UI)

Design policy: An EC-style layout with extremely high information density that maximizes product exposure. Prioritizing information volume over decoration, placing products and banners in every available margin - Density: Extremely high density. A body setting of 12px / line-height 1.1, among the smallest body text settings of any domestic site. A design philosophy that maximizes the amount of information per screen - Keywords: High density, commercial, lively, Japanese-text-first, legacy - Characteristics: Does not use CSS Custom Properties; centered on inline styles and directly written clas