body { font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; line-height: 1.8; max-width: 800px; margin: 2rem auto; padding: 0 1rem; background-color: #fdfcf9; color: #333; } h1, h2 { color: #2c3e50; } h1 { font-size: 1.8rem; margin-bottom: 1.5rem; } h2 { font-size: 1.4rem; marg…