updates

components/home/openClass.vue

@@ -107,8 +107,8 @@ export default {
     width: 600px;
     height: 450px;
     .banner_img {
-      width: 100%;
-      height: 100%;
+      width: 600px;
+      height: 450px;
       object-fit: cover;
       display: block;
     }