fix

src/views/course_details/index.vue

@@ -492,7 +492,7 @@ export default {
 
         span {
           color: #fff;
-          transform: translateX(4px) translateY(px) rotateZ(45deg);
+          transform: translateX(4px) translateY(4px) rotateZ(45deg);
           position: absolute;
           left: 30px;
           top: 10px;