/* 置灰 */
/*html {*/
/*    filter: grayscale(100%);*/
/*  -webkit-filter: grayscale(100%);*/
/*  -moz-filter: grayscale(100%);*/
/*  -ms-filter: grayscale(100%); */
/*  -o-filter: grayscale(100%);*/
/*  filter: progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);*/
/*  -webkit-filter: grayscale(1);filter: gray;*/
/*}*/