W3School TIY
编辑您的代码：
<html> <head> <style type="text/css"> h1 {letter-spacing: -0.5em} h4 {letter-spacing: 20px} </style> </head> <body> <h1>This is header 1</h1> <h4>This is header 4</h4> </body> </html>
查看结果: