Update assets/custom.css

assets/custom.css

@@ -63,14 +63,14 @@ ol:not(.options), ul:not(.options) {
 /* 屏幕宽度大于等于500px的设备 */
 @media screen and (min-width: 500px) {
     #chuanhu_chatbot {
-        height: calc(100vh - 280px);
+        height: 280px;
     }
 
 }
 /* 屏幕宽度小于500px的设备 */
 @media screen and (max-width: 499px) {
     #chuanhu_chatbot {
-        height: calc(100vh - 220px);
+        height: 220px;
     }
 }
 /* 对话气泡 */