lovecoding
/
W250511


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* .span1{
            color:blue;
        } */

        /* 嵌套选择器 控制box 里面的 span1 */
        /* .box .span1{
            color:blue;
        } */

        /* .span1{
            color: red;
        }
        .span2{
            color: red;
        } */
        /* 选择器组合 */
        /* .span1,.span2{
            color: red;
        } */

        .box .span1,.span2{
            color: green;
        }
    </style>
</head>
<body>
    <div class="box">
        <span>hello</span>
        <div>
            <span class="span1">world</span>
        </div>
    </div>
    <span class="span1">你好</span>
    <span class="span2">世界</span>
</body>
</html>