diff --git a/css/style.css b/css/style.css
index 8baf890..66309b6 100644
--- a/css/style.css
+++ b/css/style.css
@@ -195,7 +195,9 @@ html, body {
 
 /* 镜像按钮样式 */
 .toolbar-btn.mirror-btn {
-    font-size: 18px;
+    width: 30px;
+    height: 30px;
+    font-size: 16px;
 }
 
 .toolbar-divider {