css padding 在一个声明中的所有填充属性

编辑代码

<!DOCTYPE html>
<html>
<head>
<style>
p.ex1 {padding:2cm;}
p.ex2 {padding:0.5cm 3cm;}
</style>
</head>

<body>
<p class="ex1">This text has equal padding on each side. The padding on each side is 2cm.</p>
<p class="ex2">This text has a top and bottom padding of 0.5cm and a left and right padding of 3cm.</p>
</body>
</html>