appMain 布局 1200px

src/layout/components/AppMain.vue

@@ -77,5 +77,9 @@ function onScroll(val) {
   background-image: url("@/assets/images/allBack.png");
   background-size: 100% 100%;
   background-repeat: no-repeat;
+  .app-main-container {
+    width: 1200px;
+    margin: 0 auto;
+  }
 }
 </style>