update

index.html

@@ -12,6 +12,7 @@
       <div class="container">
         <main class="main">
           <h1 class="title">徐越的在线学习平台</h1>
+          <h2 class="subtitle"></h2>
           <div class="grid" id="sites"></div>
         </main>
         <div class="beian">