.head{
    width: 1200px;
    margin: auto;
    height: 180px;
    background: url('../img/head_bg.png') repeat-y;
}
.logo{
    position: relative;
    top: 50px;
    left: 0;
}
.logo img{
    width: 600px;
    margin-left: 20px;
}
.search{
    position: absolute;
    width: 250px;
    border: 1px solid #ffffff;
    border-radius: 5px;
    height: 35px;
    line-height: 35px;
    background: #ffffff;
    top: 70px;
    right: 20px;
}
.search input{
    border: none;
    background: none;
    padding-left: 8px;
    font-size: 14px;
    height: 30px;
    width: 200px;
}
.search_sub{
    position: absolute;
    width: 35px;
    top: 5px;
    right: 0;
    cursor: pointer;
}
/* 导航 */
.nav{
    width: 1200px;
    margin: auto;
    height: 50px;
    background: url('../img/nav_bg.png') repeat-y;
}
.nav-cell{
    width: 100%;
    height: 50px;
}
.nav-cell li{
    z-index: 999;
    position: relative;
    float: left;
    width: calc(100% / 11);
}
.nav-cell a{
    float: left;
    display: block;
    width: 100%;
    height: 50px;
    line-height: 50px;
    color: #FFFFFF;
    text-align: center;
}
.nav-cell a:hover{
    background: #73A6C2;
}
.nav-cell .subnav{
    display: none;
    position: absolute;
    width: 100%;
    top: 50px;
    background: #3780A8;
}
.subnav a{
    position: relative;
}
.subnav a:hover{
    background: #73A6C2;
}