<!DOCTYPE html><html><head><meta charset="utf-8"><title>网页标题</title></head><body><!-- h1-h6代表字体粗细--><h1>h1</h1><h2>h2</h2><h3>h3</h3><h4>h4</h4><h5>h5</h5><h6>h6</h6></body></html>