diff --git a/css/default.css b/css/default.css
index c8dfcfff2..90e314e7f 100644
--- a/css/default.css
+++ b/css/default.css
@@ -118,7 +118,7 @@ a:active {color:#000;text-decoration:underline}
 #ft_copy b {color:#fff}
 
 /* Mobile화면으로 */
-#g4s_cng {}
+#g4s_cng {display:block;margin:0.3em;padding:0.5em 0;border:1px solid #eee;border-radius:2em;background:#fff;color:#000;font-size:2em;text-decoration:none;text-align:center}
 
 /* 콘텐츠별 스타일 */
 /* 버튼 */
diff --git a/css/mobile.css b/css/mobile.css
index 2c3276ec5..01e364262 100644
--- a/css/mobile.css
+++ b/css/mobile.css
@@ -95,7 +95,7 @@ pre {overflow-x:scroll;font-size:1.1em}
 #ft_copy b {color:#fff}
 
 /* PC화면으로 */
-#g4s_cng {}
+#g4s_cng {display:block;margin:0.3em;padding:0.5em 0;border:1px solid #eee;border-radius:2em;color:#000;font-size:1em;text-decoration:none;text-align:center}
 
 /* 버튼 */
 .btn01 {display:inline-block;padding:0 0.5em;height:2em;border:1px solid #ccc !important;background:#fafafa !important;color:#000 !important;font-size:1em;text-decoration:none !important;line-height:2em;vertical-align:middle}
diff --git a/tail.php b/tail.php
index b52dc28ea..92be7f43b 100644
--- a/tail.php
+++ b/tail.php
@@ -29,7 +29,7 @@ if ($config['cf_include_tail']) {
     </div>
 </footer>
 
-<?if(is_mobile()){?>
+<?if(!is_mobile()){?>
 <a href="<?=$_SERVER['PHP_SELF'].($_SERVER['QUERY_STRING']?'?'.$_SERVER['QUERY_STRING'].'&amp;':'?').'device=mobile';?>" id="g4s_cng">모바일 버전으로 보기</a>
 <?}?>