I need to produce a professional product review in HTML based on the title "Home Theater Helios com Painel Cumaru/Opala." The guidelines specify using HTML elements like paragraphs, headings, emphasis tags, lists, and line breaks. I should also include inline CSS without backgrounds or colors and ensure everything is left-aligned. The review should cover aspects like sound quality, design, connectivity, and assembly while keeping it concise yet informative. The user is looking for completeness in the review. I need to use HTML without CSS while still applying inline CSS, but avoiding backgrounds and colors. I'll rely on `` for emphasis instead of color. It's essential to use `
` where appropriate and include lists with `
    ` and `
  • `. I'll steer clear of `
    ` to prevent complications and just use headings like `

    ` and `

    `. The review will have elements like pros and cons, specifications, and a rating breakdown. For the title, I’m thinking “Home Theater Helios: o que esperar do painel Cumaru/Opala.” Time to start crafting! I can use inline styles for text alignment, setting everything to the left, but since most defaults are already left-aligned, I'll need to set `text-align: left` just to be safe. I’ll avoid setting widths or max-widths and limit margins to top and bottom. I can include spacing with padding while ensuring to avoid background colors. Instead, I’ll use white and black for colors. I need to use only inline CSS in `

    `, `

  • `, and headings without any `