lovecoding
/
buke


			
				
					
						
						
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    <title>Document</title>
    <style>
        #div1{
            background: red;
        }
        .aa{
            background: green;
        }
        div{
            background: blue;
        }
    </style>
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<body>
    <!-- css选择器的优先级 
    style在标签上的样式 > id选择器 >  class选择器 > 标签选择器 
    1000                 100        10          1
    -->
    <div id="div1" class="aa" style="background: orange;">qqqqgfhjkl;</div>
    
</body>
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