Update 5 files

- /_config.yml
- /assets/css/style.scss
- /assets/js/main.js
- /_layouts/default.html
- /_layouts/post.html

_layouts/default.html

@@ -129,7 +129,7 @@
     <!-- <![endif]-->
     <footer>
       <p>
-        <small>Made with ❤ by Mayx<br />Last updated at <script>document.write(lastUpdated.toLocaleString());</script><br /> 总字数：{% include_cached word_count.html %} - 文章数：{{ site.posts.size }} - <a href="{{ site.feed.path | relative_url }}" >Atom</a> - <a href="{{ "/README.html" | relative_url }}" >About</a></small>
+        <small>Made with ❤ by Mayx<br />Last updated at {{ site.time | date: "%F %T" }}<br /> 总字数：{% include_cached word_count.html %} - 文章数：{{ site.posts.size }} - <a href="{{ site.feed.path | relative_url }}" >Atom</a> - <a href="{{ "/README.html" | relative_url }}" >About</a></small>
       </p>
     </footer>
   </div>