样式表之优先级

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Document</title>
 6     <style type="text/css">
 7     .box{
 8             font-size:100px;
 9             color:green;
10         }
11         div{
12             font-size:40px !important;
13             color:pink !important;
14         }
15         #con{
16             color:red;
17             font-size:200px;
18         }
19 
20     </style>
21 </head>
22 <body>
23         <div class="box" id="con" style="font-size:12px; color:green;">中文</div>
24 </body>
25 </html>

优先级:
 默认样式(0)<标签选择器(1)<类选择器(10)<ID选择器(100)<行内选择器(1000)<!important(1000以上)

  0      1      10      100      1000      1000以上

原文地址:https://www.cnblogs.com/twinkle-/p/9087029.html