.current a {
             font-size: 20px;
         }
 
         .over {
             display: none;
             position: absolute;
             top: 0;
             left: 0;
             width: 100%;
            height: 100%;
              background-color: black;
         opacity: 0.1;
             z-index: 1000;
         }
 
         .layout {
             display: none;
             position: absolute;
             top: 40%;
             left: 40%;
             width: 20%;
             height: 20%;
             z-index: 1001;
             text-align:center;
         }