在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(cainiaoplay.com)</title>
<style>p 
{
	border-style:solid;
	border-bottom-color:#ff0000;
}
</style>
</head>

<body>
<p>This is some text in a paragraph.</p>
</body>

</html>

源代码

动行结果