css * 选择器选择另一个元素内的所有元素

编辑代码

<!DOCTYPE html>
<html>
<head>
<style>
div *
{
background-color:yellow;
}
</style>
</head>
<body>

<h1>Welcome to My Homepage</h1>

<div class="intro">
<p id="firstname">My name is Donald.</p>
<p id="hometown">I live in Duckburg.</p>
</div>

<p>My best friend is Mickey.</p>

</body>
</html>