修复bug

src/components/FormInput.vue

@@ -82,7 +82,7 @@ $height: 50px;
     transform: translateY(0);
     color: #999;
     padding-left: 10px;
-    z-index: 4
+    z-index: 2
   }
 }
 </style>

src/components/Game.vue

@@ -85,8 +85,10 @@ export default {
 
 <style lang="scss" scoped>
 .game {
+  height: 100%;
   background-color: #ddd;
   .prevserve {
+    height: 100%;
     transform-style: preserve-3d;
     perspective: 1000px;
     perspective-origin: 30% 30%;