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

Design policy: Light theme basis (white to pale light blue-gray surfaces + brand blue #002f9e accents), expressing the sincerity, dignity, and tradition of a writing instrument brand. As the tagline "Writing, I love it" suggests, a clean, high-quality corporate design centered on a love of writing - Density: The hero section is a full-width visual. The product grid is a relaxed composition with ample whitespace, evoking the clarity of paper - Keywords: Clean, dignified, brand blue, sharp edges, wide letter spacing, Japanese medium weight - Characteristics: - The brand color is PILOT Blue #002f