diff --git a/docs/.vitepress/theme/styles/custom.css b/docs/.vitepress/theme/styles/custom.css
index 6786e3cd0..ad10dad64 100644
--- a/docs/.vitepress/theme/styles/custom.css
+++ b/docs/.vitepress/theme/styles/custom.css
@@ -1,3 +1,13 @@
+/* 灰度模式 */
+html {
+  filter: grayscale(95%);
+  -webkit-filter: grayscale(95%); /* webkit */
+  -moz-filter: grayscale(95%); /*firefox*/
+  -ms-filter: grayscale(95%); /*ie9*/
+  -o-filter: grayscale(95%); /*opera*/
+  filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=.95);
+}
+
 body {
   font-size: 16px;
 }