更改ResponsivePair的动画定位

lib/components/responsive_pair.dart

@@ -107,6 +107,7 @@ class _ResponsivePairState extends State<ResponsivePair> {
     return AnimatedSize(
       duration: const Duration(milliseconds: 150),
       curve: Curves.linear,
+      alignment: Alignment.topCenter,
       child: inner,
     );
   }