1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 6     <meta http-equiv="X-UA-Compatible" content="ie=edge">
 7     <title>勾和叉</title>
 8     <style type="text/css">
 9         a{ display: inline-block; width: 10px;height:5px; background: red;line-height: 0;font-size:0;vertical-align: middle;-webkit-transform: rotate(45deg);}
10         a:after{content:'/';display:block;width: 20px;height:5px; background: red;-webkit-transform: rotate(-90deg) translateY(-50%) translateX(50%);}
11         b{ display: inline-block; width: 20px;height:5px; background: red;line-height: 0;font-size:0;vertical-align: middle;-webkit-transform: rotate(45deg);}
12         b:after{content:'/';display:block;width: 20px;height:5px; background: red;-webkit-transform: rotate(-90deg);}
13     </style>
14 </head>
15 <body>
16     <div style="padding:50px;">
17         <a href=""></a>
18         <b></b>
19     </div>
20 </body>
21 </html>

上面是代码，下面是运行自后的截图

 css的对号错号，也就是勾和叉-风君雪科技博客