--- /dev/null
+<style>
+ html {
+ display: none;
+ }
+</style>
+<script>
+ if (self == top) {
+ document.documentElement.style.display = 'block';
+ } else {
+ top.location = self.location;
+ }
+</script>
+<div id="app"></div>
\ No newline at end of file