.banner {
    margin: 0 auto;
    width: 100%;
    margin-top: 20px;
}
.pro-switch {
    height: 137px;
    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: 100%;
}
.slides:after {
    content: ".";
    display: block;
    clear: both;
    visibility: hidden;
    line-height: 0;
    height: 0;
}
html[xmlns] .slides {
    display: block;
}
* html .slides {
    height: 137px;
}
.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: 60px;
    height: 90px;
    margin: -60px 0 0;
    display: block;
    background: url(../images/ad_ctr1.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: 0;
}
.flex-direction-nav .flex-prev {
    left: 0;
}
.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; left:0;
    text-align: center;

}
.flex-control-nav li {
    margin: 0 5px;
    display: inline-block;
    zoom: 1;
    *display: inline;
}
.flex-control-paging li a {
    display:block;
    height: 6px;
    overflow: hidden;
    text-indent:-99em;
    width: 16px;
    cursor: pointer;
    background: #cac9aa;
}
.flex-control-paging li a.flex-active {
    width: 30px;
    background: #74a9d1;
}