#header_logo {
    width: 700px;
    height: 75px;
    line-height: 75px;
    float: left;
    z-index: 1;
    position: relative;
}

#header_logo img {
    position: absolute;
    top: 6px;
}

#header_menu {
    width: 500px;
    height: 73px;
    float: right;
    text-align: right;
    background: #212121;
    line-height: 73px;
}

#header_menu span {
    position: relative;
    padding: 5px 15px;
    font-size: 14px;
    z-index: 2;
    font-family: "微软雅黑";
    color: #fff;
    margin-left: 3px;
}

#header_sub {
    height: 39px;
    width: 100%;
    background: #4DB6C0; /*实现IE背景透明*/
    float: left;
    min-width: 1120px;
}