diff --git a/ch10/router-test10/src/pages/VideoPlayer.vue b/ch10/router-test10/src/pages/VideoPlayer.vue
index 75d61ba..53f806f 100644
--- a/ch10/router-test10/src/pages/VideoPlayer.vue
+++ b/ch10/router-test10/src/pages/VideoPlayer.vue
@@ -74,7 +74,7 @@ export default {
 <style scoped>
 .modal { display: block; position: fixed; z-index: 1; 
     left: 0; top: 0; width: 100%; height: 100%;
-    overflow: auto; background-color: rgb(0,0,0); 
+    overflow: auto;  
     background-color: rgba(0,0,0,0.4); }
 .box { background-color: white; margin:80px auto;
     max-width: 500px; min-width: 100px; min-height: 350px;
diff --git a/ch10/router-test5/src/pages/VideoPlayer.vue b/ch10/router-test5/src/pages/VideoPlayer.vue
index 071acbb..24a8c1d 100644
--- a/ch10/router-test5/src/pages/VideoPlayer.vue
+++ b/ch10/router-test5/src/pages/VideoPlayer.vue
@@ -71,7 +71,7 @@ export default {
 <style scoped>
 .modal { display: block; position: fixed; z-index: 1; 
     left: 0; top: 0; width: 100%; height: 100%;
-    overflow: auto; background-color: rgb(0,0,0); 
+    overflow: auto; 
     background-color: rgba(0,0,0,0.4); }
 .box { background-color: white; margin:80px auto;
     max-width: 500px; min-width: 100px; min-height: 350px;
diff --git a/ch10/router-test6-1/src/pages/VideoPlayer.vue b/ch10/router-test6-1/src/pages/VideoPlayer.vue
index f1be2bc..b6f0af7 100644
--- a/ch10/router-test6-1/src/pages/VideoPlayer.vue
+++ b/ch10/router-test6-1/src/pages/VideoPlayer.vue
@@ -71,7 +71,7 @@ export default {
 <style scoped>
 .modal { display: block; position: fixed; z-index: 1; 
     left: 0; top: 0; width: 100%; height: 100%;
-    overflow: auto; background-color: rgb(0,0,0); 
+    overflow: auto;  
     background-color: rgba(0,0,0,0.4); }
 .box { background-color: white; margin:80px auto;
     max-width: 500px; min-width: 100px; min-height: 350px;
diff --git a/ch10/router-test7-3/src/pages/VideoPlayer.vue b/ch10/router-test7-3/src/pages/VideoPlayer.vue
index 75d61ba..437c4f0 100644
--- a/ch10/router-test7-3/src/pages/VideoPlayer.vue
+++ b/ch10/router-test7-3/src/pages/VideoPlayer.vue
@@ -74,7 +74,7 @@ export default {
 <style scoped>
 .modal { display: block; position: fixed; z-index: 1; 
     left: 0; top: 0; width: 100%; height: 100%;
-    overflow: auto; background-color: rgb(0,0,0); 
+    overflow: auto; 
     background-color: rgba(0,0,0,0.4); }
 .box { background-color: white; margin:80px auto;
     max-width: 500px; min-width: 100px; min-height: 350px;
diff --git a/ch10/router-test8/src/pages/VideoPlayer.vue b/ch10/router-test8/src/pages/VideoPlayer.vue
index 75d61ba..437c4f0 100644
--- a/ch10/router-test8/src/pages/VideoPlayer.vue
+++ b/ch10/router-test8/src/pages/VideoPlayer.vue
@@ -74,7 +74,7 @@ export default {
 <style scoped>
 .modal { display: block; position: fixed; z-index: 1; 
     left: 0; top: 0; width: 100%; height: 100%;
-    overflow: auto; background-color: rgb(0,0,0); 
+    overflow: auto; 
     background-color: rgba(0,0,0,0.4); }
 .box { background-color: white; margin:80px auto;
     max-width: 500px; min-width: 100px; min-height: 350px;
diff --git a/ch10/router-test9/src/pages/VideoPlayer.vue b/ch10/router-test9/src/pages/VideoPlayer.vue
index 75d61ba..d43aa22 100644
--- a/ch10/router-test9/src/pages/VideoPlayer.vue
+++ b/ch10/router-test9/src/pages/VideoPlayer.vue
@@ -74,7 +74,7 @@ export default {
 <style scoped>
 .modal { display: block; position: fixed; z-index: 1; 
     left: 0; top: 0; width: 100%; height: 100%;
-    overflow: auto; background-color: rgb(0,0,0); 
+    overflow: auto;
     background-color: rgba(0,0,0,0.4); }
 .box { background-color: white; margin:80px auto;
     max-width: 500px; min-width: 100px; min-height: 350px;