fixed 返回顶部功能

themes/Ying/layouts/partials/footer.html

@@ -13,6 +13,9 @@
 </div>
 </div>
 </div>
+<a href="#" id="back-to-top" title="返回顶部">
+  <i class="ri-arrow-up-s-line"></i>
+</a>
 <script src="/js/iconfont.js"></script>
 <script src="/js/lightgallery.umd.min.js"></script>
 <script src="/js/uikit.min.js"></script>