把以下这段代码放到<head> </head>之间
<style>
html {
-webkit-filter: grayscale(100%);
-moz-filter: grayscale(100%);
-ms-filter: grayscale(100%);
-o-filter: grayscale(100%);
filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
_filter:none;
}
</style>
![点击查看原图](/UploadFiles/clubfiles/2022-12/2022120109131799226.png)