    .flexslider {
        margin: 0px auto 20px;
        position: relative;top:-15px; 
        width: 100%;
        height: 420px;
        overflow: hidden;
        zoom: 1;
    }
    
    .flexslider .slides li {
        width: 100%;
        height: 100%;
    }
    
    .flex-direction-nav a {
        width: 70px;
        height: 70px;
        line-height: 99em;
        overflow: hidden;
        margin: -35px 0 0;
        display: block;
        background: url(../images/ad_ctr.png) no-repeat;
        position: absolute;
        top: 50%;
        z-index: 10;
        cursor: pointer;
        opacity: 0;
        filter: alpha(opacity=0);
        -webkit-transition: all .3s ease;
        border-radius: 35px;
    }
    
    .flex-direction-nav .flex-next {
        background-position: 0 -70px;
        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;
        text-align: center;
    }
    
    .flex-control-nav li {
        margin: 0 2px;
        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,
    .flex-control-paging li.active a {
        background-position: 0 0;
    }
    
    .flexslider .slides a img {
        width: 100%;
        height: 420px;
        display: block;
    }