div.head_nav{
    height: 82px;
    width: 100%;
    position: absolute;
    top: 0;
    overflow: hidden;
    min-width: 1200px;
}
div.head_nav .head_bg{
    width: 100%;
    height: 100%;
    background-color: #494949;
    filter:alpha(opacity=5);  /* 只支持IE6、7、8、9 */
    -moz-opacity:0.5;  /* FireFox 火狐 */
    -khtml-opacity: 0.5;  /* 兼容老的Safari (1.x) -- */
    opacity: 0.5;    /* 标准浏览器 */
    position: absolute;
    z-index: 10;
}
div.head_nav .head_center{
    width: 1200px;
    height: 100%;
    margin: 0px auto;
    position: relative;
    z-index: 12;
}
div.head_nav .head_center .logo{
    margin-top: 20px;
    float: left;
}
div.head_nav .head_center .head_navs{
    float: left;
    margin-left: 55px;
}
div.head_nav .head_center .head_navs ul{
    list-style: none;
}
div.head_nav .head_center .head_navs ul li{
    float: left;
    line-height:82px;
    height: 82px;
    font-size: 16px;
    width: 120px;
    color: #fff;
    font-weight: lighter;
    text-align: left;
    cursor: pointer;
}
div.head_nav .head_center .head_navs ul li a{
    color: #fff;
    display: block;
    height: 60px;
    text-decoration:none; 
    display: inline-block; 
    padding-bottom:10px;  /*这里设置你要空的距离*/
}
div.head_nav .head_center .head_navs ul li a:hover{
    font-weight: bold;
    border-bottom:2px solid #fff; /* #ccc换成链接的颜色 */
}
div.head_nav .head_center .head_phone{
    float: right;
    line-height:82px;
    height: 82px;
    font-size: 16px;
    color: #fff;
}


div.footer{
    width: 100%;
    height: 30px;
    margin-top: -30px;
    position: relative;
    z-index: 10;
}
div.footer>.center{
    width: 1200px;
    overflow: hidden;
    margin: 0px auto;
    text-align: center;
}