fix

src/views/index.vue

@@ -537,7 +537,7 @@
   .card {
     text-align: center;
     margin: 20px;
-    background-image: url("../assets/knowledge/预警数量.png");
+    background-image: url("../assets/knowledge/panel.png");
     background-repeat: no-repeat;
     background-size: 100% 100%;
   }