fix

src/views/coursewarePlay/component/tools/pen.module.less

@@ -25,6 +25,8 @@
     position: absolute;
     right: 15Px;
     bottom: 0;
+    bottom: constant(safe-area-inset-bottom);
+    bottom: env(safe-area-inset-bottom);
     width: 50Px;
     height: 54Px;
     display: flex;