标签：cal body span nbsp div code -o web gray
body {
-webkit-filter: grayscale(100%);
-moz-filter: grayscale(100%);
-ms-filter: grayscale(100%);
-o-filter: grayscale(100%);
filter: grayscale(100%);
}
标签：cal body span nbsp div code -o web gray
原文地址：https://www.cnblogs.com/zhouyuxiang/p/12627930.html
