标签居中问题fix review by jun.qiu

@@ -183,7 +183,10 @@ export default {
         color: #fff;
         color: #fff;
         background: #000;
         background: #000;
         padding: 4px 8px;
         padding: 4px 8px;
-        font-size: 18px;
+        text-align: center;
+        font-size: 24px;
+        line-height: 30px;
+        display: inline-block;
       }
       }
     }
     }
   }
   }