diff --git a/index.html b/index.html
index 9225ea4..fd8d1a5 100644
--- a/index.html
+++ b/index.html
@@ -17,6 +17,11 @@
     .markdown-section code {
       font-weight: 400;
     }
+
+    /* dark mode 全局文章图片背景色 */
+    article img {
+      background-color: #42b983;
+    }
   </style>
 </head>