fix[app]: modify app layout style

app.wxss

@@ -5,10 +5,6 @@ page {
 }
 .container {
   height: 100%;
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: space-between;
-  padding: 200rpx 0;
+  width: 100%;
   box-sizing: border-box;
 }