去掉没用的css

index.html

@@ -958,18 +958,6 @@
       animation: fadeIn 0.6s ease-out forwards;
     }
 
-    .delay-100 {
-      animation-delay: 0.1s;
-    }
-
-    .delay-200 {
-      animation-delay: 0.2s;
-    }
-
-    .delay-300 {
-      animation-delay: 0.3s;
-    }
-
     .loading-overlay {
       display: none;
       position: fixed;