@media (min-width:0) { 	
    #mainBanner .bxslider li .txtbox_wrap { top:45%; }
}
@media (min-width:768px) { 	
    #mainBanner .bxslider li .txtbox_wrap { top:45%; }
}
@media (min-width:992px) {
    #mainBanner .bxslider li .txtbox_wrap { top:35%; width: 400px; right: inherit; left: 50%; margin-left: -450px; }
}
@media (min-width:1200px) {
    #mainBanner .bxslider li .txtbox_wrap { top:35%; width: 600px; margin-left: -550px; }
}
@media (min-width:1440px) {
    #mainBanner .bxslider li .txtbox_wrap { top:35%; margin-left: -600px; }
}