网站变灰

filter

https://developer.mozilla.org/zh-CN/docs/Web/CSS/filter

-webkit-filter: grayscale(.95);

在首页中加如下css内容

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);
}