better style for time tips

src/DPlayer.scss

@@ -367,11 +367,10 @@
                 }
                 position: absolute;
                 left: 0px;
-                top: -25px;
+                top: -20px;
                 width: 30px;
-                border-radius: 10px;
-                box-shadow: 0px 0px 10px 3px rgba(0, 0, 0, 0.62);
-                padding: 10px 5px;
+                border-radius: 4px;
+                padding: 5px 7px;
                 background-color: rgba(0, 0, 0, 0.62);
                 color: #fff;
                 font-size: 12px;