W3School TIY
编辑您的代码：
<html> <head> <style type="text/css"> p.normal {font-weight: normal} p.thick {font-weight: bold} p.thicker {font-weight: 900} </style> </head> <body> <p class="normal">This is a paragraph</p> <p class="thick">This is a paragraph</p> <p class="thicker">This is a paragraph</p> </body> </html>
查看结果: