#main { padding-bottom: 60%; }
#main .survey-title { color: #666666; line-height: 50px; height: 50px; background: #e7e7e7; font-weight: bold; }
#main .success { margin: auto; padding: 10px; font-size: 15px; }
#main .btn { margin: auto; width: 305px; margin-top: 20px; }