body { font-family: "Yu Gothic", sans-serif; color: #1e1e1e; background: #fdfdfd; padding: 2rem 1rem; max-width: 720px; margin: auto; line-height: 1.8; } h2 { font-size: 1.5rem; margin-top: 3rem; padding-bottom: 0.4rem; border-bottom: 2px solid #eee; } h3 { font-size: 1.2rem; margin-top: 2rem; color…