fix: 修复下拉页面会移动的问题

src/App.vue

@@ -10,7 +10,13 @@
   margin: 0;
   padding: 0;
 }
-
+html,
+body {
+  overflow: hidden;
+  position: fixed;
+  width: 100%;
+  height: 100%;
+}
 .app {
   width: 100%;
   height: 100vh;