body { font-family: Arial, sans-serif; line-height: 1.6; } .important { color: red; font-weight: bold; } .toc { background: #f9f9f9; padding: 10px; border: 1px solid #ddd; margin-bottom: 20px; } .toc a { text-decoration: none; color: #007BFF; } .toc a:hover { text-decoration: underline; } ナイアシンアミドで健…