Update 4 files

- /assets/css/style.scss
- /_layouts/post.html
- /_layouts/default.html
- /_data/ai-cache.json

assets/css/style.scss

@@ -3,6 +3,11 @@
 
 @import "{{ site.theme }}";
 
+a:hover {
+    font-weight: inherit;
+    text-decoration: underline;
+}
+
 .backToTop {
     display: none;
     width: 18px;