body { font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; background-color: #f9f9f9; color: #333; line-height: 1.8; margin: 0; padding: 2rem; } .container { max-width: 800px; margin: 0 auto; background-color: #fff; padding: 2rem; border-radius: 12px; box-shadow: 0 4px 10px rgba(0,0,0,0.05…