body{
    background-color: #f5f5f5;
}
/**header**/
.header {
    width: 100%;
    height: 460px;
    position: relative;
    min-width: 1200px;
}
.header a {
    display: block;
    width: 100%;
    height: 100%;
}
.header .img_prev, .header .img_next{
    z-index: 10;
    position: absolute;
    width: 45px;
    height: 45px;
    bottom: 250px;
    opacity: 0;
    border-radius: 50%;
    cursor: pointer;
    filter: progid:DXImageTransform.Microsoft.Alpha(opacity=50);
    transition: opacity 0.3s ease-in-out;   
    background:#000 url("../../img/index/slider-arrow.png") no-repeat;
}
.header .img_prev{
    left: 5%;
    background-position: 5px 2px;
}
.header .img_next{
    right: 5%;
    background-position: -42px 1px;
}
.header:hover .img_prev{
    opacity: 0.7;
    filter: progid:DXImageTransform.Microsoft.Alpha(opacity=100);
}
.header:hover .img_next{
    opacity: 0.7;
    filter: progid:DXImageTransform.Microsoft.Alpha(opacity=100);
}
.header .focus {
    width: 100%;
    overflow: hidden;
}
.header .focus .bigUl {
    width: 100%;
}
.header .focus .bigUl li {
    width: 100%;
    height:460px;
    float: left;
    position: relative;
    overflow: hidden;
}
.header .focus .bigUl li a{
    position: absolute;
    top: 0;
    left: 50%;
    width: 1920px;
    margin-left: -960px;
}
.nav{
    width: 100%;
    background: url("../../img/index/nav.jpg") repeat-x left top;
}
.nav ul{
    width: 1200px;
    margin: 0 auto;
}
.nav .nav-item{
    float: left;
    width: 132px;
}
.nav .nav-item a{
    display: block;
    width: 100%;
    color: #FFF;
    font-size: 16px;
    line-height: 50px;
    text-align: center;
    text-decoration: none;
}
.nav .nav-item.act a{
    font-weight: 600;
    background-color: #50bf48;
}