站点哀悼色样式

<style>
    html{
        -webkit-filter:grayscale(100%);
        -moz-filter:grayscale(100%);
        -ms-filter:grayscale(100%);
        -o-filter:grayscale(100%);
        filter:grayscale(100%);
        filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1)
    }
    html,body,img,span,a,li{
        -moz-filter: grayscale(100%);
        -ms-filter: grayscale(100%);
        -o-filter: grayscale(100%);
        filter: gray;
    }
</style>