W3School TIY Editor

<!DOCTYPE html>
<html>
<head>
<style>
a.one:link {color:#ff0000;}
a.one:visited {color:#0000ff;}
a.one:hover {color:#ffcc00;}

a.two:link {color:#ff0000;}
a.two:visited {color:#0000ff;}
a.two:hover {font-size:150%;}

a.three:link {color:#ff0000;}
a.three:visited {color:#0000ff;}
a.three:hover {background:#66ff66;}

a.four:link {color:#ff0000;}
a.four:visited {color:#0000ff;}
a.four:hover {font-family:monospace;}

a.five:link {color:#ff0000;text-decoration:none;}
a.five:visited {color:#0000ff;text-decoration:none;}
a.five:hover {text-decoration:underline;}
</style>
</head>
<body>

请把鼠标移到链接上并观察样式的变化：

<a class="one" href="/index.html" target="_blank">此链接改变颜色</a>
<a class="two" href="/index.html" target="_blank">此链接改变字体大小</a>
<a class="three" href="/index.html" target="_blank">此链接改变背景色</a>
<a class="four" href="/index.html" target="_blank">此链接改变字体族</a>
<a class="five" href="/index.html" target="_blank">此链接改变文本装饰</a>

</body>
</html>