Update index.html

Author: steve-zeyu-zhang

index.html

@@ -462,7 +462,7 @@ <h2 class="title is-3">Ablation Studies</h2>
 </section>
 
 <!-- Paper poster -->
-<section class="hero is-small is-light">
+<section class="hero is-small">
   <div class="hero-body">
     <div class="container">
       <h2 class="title">Poster</h2>