a标签样式提到common.scss中

assets/scss/common.scss

@@ -618,3 +618,11 @@ div.el-tree-node__content{
   padding: 14px !important;
 }
 
+a {
+  color: #2d8cf0;
+  background: 0 0;
+  text-decoration: none;
+  outline: 0;
+  cursor: pointer;
+  transition: color .2s ease;
+}