清楚浮动

@@ -27,14 +27,15 @@
     }
 
     .button-group {
-        display: flex;
-        flex-direction: row;
         justify-content: space-around;
         align-items: stretch;
         height: 88px;
+        text-align: center;
 
         a.modal-button {
-            flex: 1;
+            width: 45%;
+            display: inline-block;
+            margin-top: 0.5rem;
             align-self: center;
             text-align: center;
             color: $blue;