diff --git a/assets/custom.css b/assets/custom.css
index ffb9f0c..63cb989 100644
--- a/assets/custom.css
+++ b/assets/custom.css
@@ -62,7 +62,8 @@ ol:not(.options), ul:not(.options) {
 }
 /* 屏幕宽度大于等于500px的设备 */
 #chuanhu_chatbot {
-        height: 300%;
+        height: 100%;
+        min-height: 300px;
     }
 /* 对话气泡 */
 [class *= "message"] {