<|Assistant|>…HTML content…
But in the query, they wrote: “Format the entire response in valid HTML5…” So the assistant should output the HTML code as the response. So the final answer should be the HTML code itself, without any surrounding text. So the assistant’s response should start with and include the HTML structure, without any extra symbols before or after.
Wait, the user’s example shows that the assistant’s response is the HTML code. So I need to generate the HTML code as the response, ensuring that there are no extra characters before or after the HTML tags. So the final answer should be the HTML code directly, starting with and ending with