修改

src/views/portal/course/Index.vue

@@ -758,6 +758,19 @@ export default {
 </script>
 
 <style scoped lang="scss">
+.course-card{
+     position: relative;
+}
+// ::v-deep .course-image-box :hover .el-image{
+//         transition: all 10s;
+//         z-index: 999;
+//         position: absolute;
+//         top: -50%;
+//         width: 500px !important;
+//         height: 500px !important;
+    
+// }
+
 .list-active{
   display: none;
   width: 458px;