SEO Expert Copywriter. Educational, informative, trustworthy. Certidão de ITR: O que é e para que serve? (Must be reformulated into a question or useful statement for Title/H1). A long list of questions and terms (ITR, NIRF, calculations, deadlines, etc.). Title and H1 must be identical and a question/statement. No fluff in the first paragraph (Gold Paragraph). Pure HTML (h1, h2, h3, p, ul, li, ol, a, strong, em, table). No markdown. Max 3 `` placeholders, placed after complete elements (not after titles). Mention "Sistema Federal" for certificates; link to specific ITR product. Min 800 words, Brazilian Portuguese (pt-BR), short paragraphs. JSON object with `title`, `description`, `tags`, `content`, `schema_markup` (