DNP (Dai Nippon Printing) Style Design System (DESIGN.md, Japanese UI)

Design policy: A general corporate site with a straight-line basis that uses almost no rounded corners. The brand is established with a single deep cobalt blue, and surfaces are composed only of white and extremely pale blue-gray. A design that prioritizes information reachability over decoration - Density: A high-information-density corporate type that places business domains, IR, and news on a single page. Cards are aligned in an equal-width grid, and links are unified as rectangular buttons with arrows - Keywords: Linear, robust, monochrome blue, information-rich, flat