修复图片未占满bug

src/pages/index/index.less

         height: 100%;
         top: 0;
         left: 0;
+        a{
+          height: 100%;
+          display: inline-block;
+        }
         img{
           width: 100%;
+          height: 100%;
+          object-fit: cover;
           display: block;
         }
         .slideZ{