Update app.py

app.py

@@ -173,7 +173,7 @@ def predict(input,
 
 if __name__ == "__main__":
     block = gr.Blocks()
-    with block( theme='darkdefault',title='Meiya GPT大模型') as demo:
+    with block(title='Meiya GPT大模型') as demo:
         gr.Markdown("<script language='javascript'>document.body.classList.toggle('dark');</script><div align='center' style='display: flex;flex-direction: row;'> \
                         <div style='width:40%; flex: 1;padding: 10px;text-align: -webkit-right;'><img style='height:35px' src='https://aigpt.sphq.cn/chat/meiya_logo_white.png'></div> \
                             <div style='width:50%; margin-left: 10px; text-align: left;'><h2> Meiya GPT 美亚柏科大模型</span> </h2></div> \