correccion

web/manuel/css/style.css

@@ -698,7 +698,7 @@ section.sec2{
         top: 0;
         bottom: 0;
         content: "";
-        background: #212121 url(http://i.stack.imgur.com/sValK.png) 0 0 no-repeat; /* replace with an image that tells the visitor to rotate the device to landscape mode */
+        background: #212121 url('../images/girar-dispositivo.jpg') 0 0 no-repeat; /* replace with an image that tells the visitor to rotate the device to landscape mode */
         background-size: 100% auto;
         opacity: 0.95;
     }