body { font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; line-height: 1.8; padding: 20px; max-width: 800px; margin: 0 auto; background: #f9f9f9; color: #333; } h1 { color: #333; border-bottom: 3px solid #ff9900; padding-bottom: 10px; } h2 { color: #444; margin-top: 30px; border-left: 6px…