修复移动端地图刷出屏幕外问题

src/views/dungeon/dungeon.vue

@@ -46,7 +46,7 @@ watch(() => props.dungeon, () => {
 const ramdonPosition = () => {
     if (state.mobile) {
         left.value = Math.random() * 80 + 5 + 'vw';
-        top.value = Math.random() * 80 + 10 + 'vh';
+        top.value = Math.random() * 70 + 5 + 'vh';
     } else {
         left.value = Math.random() * 64 + 2.5 + 'rem';
         top.value = Math.random() * 50 + 2.5 + 'rem';