修改阶段样式

src/components/courseDetail.vue

@@ -483,8 +483,8 @@ export default {
   cursor: pointer;
 }
 .blue_box_one {
-  width: 250px;
-  height: 250px;
+  width: 200px;
+  height: 200px;
   background-image: linear-gradient(90deg, #477cd7, #65b9fc);
   display: flex;
   flex-direction: column;