diff --git a/src/views/Index.vue b/src/views/Index.vue
index ee91a566..1d400ef1 100644
--- a/src/views/Index.vue
+++ b/src/views/Index.vue
@@ -3107,9 +3107,11 @@ export default {
   }
 }
 .courseBg{
+  width: 332px;
+  height: 323px;
   background: url("../assets/images/course/courseBackground.png") no-repeat;
-  background-size: cover; /* 或 use 'contain' */
-  background-position: center; 
+  background-size: 100% 100%; /* 或 use 'contain' */
+  background-position: center;
   border: none;
 }
 </style>