update mobile style

packages/artplayer/src/style/mask.less

@@ -16,6 +16,7 @@
 
     &.art-mask-show {
         .art-state {
+            pointer-events: auto;
             opacity: var(--art-state-opacity);
             transform: scale(1);
         }

packages/artplayer/src/style/mobile.less

@@ -0,0 +1,5 @@
+.art-mobile {
+    --art-control-height: 36px;
+    --art-control-icon-scale: 1;
+    --art-state-size: 60px;
+}

packages/artplayer/src/style/plugins.less

@@ -15,7 +15,7 @@
         height: 34px;
         width: 34px;
         border-radius: 50%;
-        background-color: var(--art-background);
+        background-color: rgba(0, 0, 0, 0.5);
     }
 
     .art-layer-auto-playback {