哀悼日全站变灰代码

<style type="text/css">
html { filter: grayscale(100%); -webkit-filter: grayscale(100%); -moz-filter: grayscale(100%); -ms-filter: grayscale(100%); -o-filter: grayscale(100%); filter: url("data:image/svg+xml;utf8,#grayscale"); filter: progid:DXImageTransform.Microsoft.BasicImage(grayscale=1); -webkit-filter: grayscale(1);}

</style>