添加backdrop选项

packages/artplayer/src/style/contextmenu.scss

@@ -8,7 +8,7 @@
         top: 0;
         min-width: 200px;
         padding: 5px 0;
-        background:rgba(0, 0, 0, 0.8);
+        background: rgba(0, 0, 0, 0.9);
         border-radius: 3px;
 
         .art-contextmenu {
@@ -21,23 +21,24 @@
             text-overflow: ellipsis;
             white-space: nowrap;
             text-shadow: 0 0 2px rgba(0, 0, 0, 0.5);
-            border-bottom: 1px solid rgba(255,255,255,.1);
+            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
 
             a {
                 color: #fff;
                 text-decoration: none;
             }
-    
+
             span {
                 display: inline-block;
                 padding: 0 7px;
-                &:hover, &.art-current {
+                &:hover,
+                &.art-current {
                     color: #00c9ff;
                 }
             }
 
             &:hover {
-                background-color: rgba(255,255,255,.1);
+                background-color: rgba(255, 255, 255, 0.1);
             }
 
             &:last-child {