diff --git a/src/assets/styles/design.less b/src/assets/styles/design.less
index fc959f7..f173080 100644
--- a/src/assets/styles/design.less
+++ b/src/assets/styles/design.less
@@ -136,6 +136,12 @@
     z-index: 8;
   }
   .shelter-bg {
-    background-color: #ffffff;
+    // background-color: #ffffff;
+    background-color: #f0f0f0;
+    background-image: linear-gradient(to top right, #fff 25%, transparent 25%, transparent 75%, #fff 75%, #fff), linear-gradient(to top right, #fff 25%, transparent 25%, transparent 75%, #fff 75%, #fff);
+    background-position: 0 0, 8px 8px;
+    background-size: 16px 16px;
+    overflow: hidden;
+    user-select: none;
   }
 }