update

user_web/src/view/student/trainChapter/trainChapter.vue

@@ -1141,6 +1141,8 @@ const carCameraScreenshotEventSonarCar = (base64Str : any) => {
                 background-size: 100% 100%;
                 color: white;
                 font-size: 2rem;
+                overflow: hidden;
+
                 &:before {
                     content: '';
                     display: inline-block;