[Layout] modify layout of mobile version

modify layout arrangement of mobile

src/components/CFP/Intro.vue

@@ -89,8 +89,9 @@
             </svg>
             <div class="box-back2" style="margin-top: 1000px;">
                 <div class="topic-intro">
-                    <h1 class="right">2021 年會主題</h1>
+                    <!-- <h1 class="right"></h1> -->
                     <h1 class="right">
+                        2021 年會主題<br/>
                         <span class="enlarge">算盤的後裔</span>
                     </h1>
                     <p class="context">