激活tab的样式问题

src/views/index.vue

@@ -271,7 +271,7 @@ export default {
           span:nth-child(2) {
             position: relative;
             left: 0;
-            bottom: px2rem(-9px);
+            bottom: px2rem(-8px);
             z-index: 2;
             width: px2rem(10px);
             height: px2rem(3px);