diff --git a/doc/btn.html b/doc/btn.html
index 2814ae7..6ed66fb 100644
--- a/doc/btn.html
+++ b/doc/btn.html
@@ -1,10 +1,4 @@
 <div>
-    <style>
-        img {
-            width: 22px;
-            height: 22px;
-        }
-    </style>
     <button class="bny-btn">默认</button>
     <button class="bny-btn bg-secondary">蓝色</button>
     <button class="bny-btn bg-success">绿色</button>