.main { margin: 0 auto; width: 100%; }
.pro-switch { height: 660px; overflow: hidden; position: relative; width: 100%; }
.flexslider { margin: 0; padding: 0; }
.flexslider .slides > li { display: none; -webkit-backface-visibility: hidden; }
.flexslider .slides .img { width: 100%; display: block; height: 660px; }
.slides:after { content: "."; display: block; clear: both; visibility: hidden; line-height: 0; height: 0; }
html[xmlns] .slides { display: block; }
* html .slides { height: 100%; }
.no-js .slides > li:first-child { display: block; }
.flexslider { margin: 0 auto; position: relative; width: 100%; zoom: 1; }
.flex-viewport { max-height: 2000px; -webkit-transition: all 1s ease; -moz-transition: all 1s ease; transition: all 1s ease; }
.flexslider .slides { zoom: 1; }
.flex-direction-nav { *height: 0;
}
.flex-direction-nav a { width: 77px; height: 77px; margin: 0; display: block; background: url(../images/ad_ctr.png) no-repeat 0 0; position: absolute; top: 50%; z-index: 10; cursor: pointer; text-indent: -9999px; opacity: 0; filter: alpha(opacity=0); -webkit-transition: all .3s ease; }
.flex-direction-nav .flex-next { background-position: 0 -90px; right: 300px; }
.flex-direction-nav .flex-prev { left: 300px; }
.flexslider:hover .flex-next { opacity: 0.8; filter: alpha(opacity=25); }
.flexslider:hover .flex-prev { opacity: 0.8; filter: alpha(opacity=25); }
.flexslider:hover .flex-next:hover, .flexslider:hover .flex-prev:hover { opacity: 1; filter: alpha(opacity=50); }
.flex-control-nav { width: 100%; position: absolute; bottom: 10px; text-align: center; }
.flex-control-nav li { margin: 0 5px; display: inline-block; zoom: 1; *display: inline;
}
.flex-control-paging li a { background: url(../images/dot.png) no-repeat 0 -16px; display: block; height: 16px; overflow: hidden; text-indent: -99em; width: 16px; cursor: pointer; }
.flex-control-paging li a.flex-active { background-position: 0 0; }


.columnbanner{height: 360px;
width: 100%!important;
    margin: 0 auto;
    background: url() center 0 no-repeat;
    overflow: hidden;
    background-size: cover;
}