1124_update: fix

css/index.css

@@ -37,6 +37,7 @@ a{
     top: 7%;
 }
 .floor_icon img {
+    width: 100%;
     height: auto;
     left: 100%;
     margin-bottom: 20%;

index.html

@@ -19,7 +19,7 @@
         <div class="floor_icon">
             <img src="../images/icon_B_1F.png" alt="1F">
             <img src="../images/icon_B_B1.png" alt="B1">
-            <img src="../images/solid_line.png" alt="solid_line" style="margin-left: 12%;">
+            <img src="../images/solid_line.png" alt="solid_line">
             <img src="../images/icon_B_3D.png" alt="3D">
         </div>
     </nav>