body { background: #f7f7f5; font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; line-height: 1.9; color: #333; padding: 2em; } .container { max-width: 720px; background: white; padding: 2.5em; margin: auto; box-shadow: 0 0 10px rgba(0,0,0,0.05); border-radius: 10px; } h1 { font-size: 1.8em…