Set the display property to none as the default, then use a media query to apply the desired styles to the div when the browser reaches a certain width. Replace 768px in the media query with whatever the minimum px value is where your div should be visible.
#title_message {
display: none;
}
@media screen and (min-width: 768px) {
#title_message {
clear: both;
display: block;
float: left;
margin: 10px auto 5px 20px;
width: 28%;
}
}