body { font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; line-height: 1.9; max-width: 720px; margin: 3em auto; padding: 0 1em; background: #fff; color: #222; } h1 { font-size: 1.6em; border-left: 6px solid #444; padding-left: 0.6em; margin-bottom: 1em; } h2 { font-size: 1.2em; color: #66…