修复层级过低问题

uni_modules/cool-ui/components/cl-topbar/cl-topbar.uvue

@@ -241,7 +241,8 @@ function back() {
 	}
 
 	&--fixed {
-		@apply fixed top-0 left-0 right-0 z-10 w-full;
+		@apply fixed top-0 left-0 right-0 w-full;
+		z-index: 998;
 	}
 }
 </style>