css基础选择器

基础选择器:

1.通用选择器           2. 标签选择器         3.类选择器          4.id选择器

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>自己试的</title>
		<style type="text/css">
			*{
				color: green;font-size: 20px;
			}
			span{
				color: red;background: lightblue;text-decoration: none;
			}
			p{
				color: blue;text-decoration: underline;
			}
			.a{color: yellow;background: thistle;
				
			}
			#p{height: 900px;width: 500px;color: black 
				
			}
			
			.yi{
				text-decoration: none;
			}
		</style>
	</head>
	<body>

		<span class="a" id="p" style="color: darkslategray;background: lightcoral;">我是span标签</span>
		
		<span>我是span标签</span>
		<span>我是span标签</span>
		<p>我是p标签</p>
		<p>我是p标签</p>
		<p class="yi"><span>
			我是p-sapn标签
		</span></p>
		<h3>我是h3</h3>
		<b>我是b</b>
	</body>
</html>

运行效果如下: 

css基础选择器