#daohang{
    width: 100%;
    height: 85px;
    background-color:#fff;
    background-color: rgb(255, 255, 255 , 0.3);
    margin: auto;
}
#backg{
    width: 1200px;
    height: 85px;
    /* background-color: #FECC5B; */
    margin: auto;
}
#logo{
    float: left;
    /* background-color: #FFF; */
    margin: 17px 0px;
}
#top_daohang a{
    display:inline-block;
    color: #fff;
    /* background-color: antiquewhite; */
    height: 85px;
    text-align: center;
    line-height: 85px;
}
#top_daohang a:hover{
    color:#000
}
.nav{
        width: 800px;
        height: 85px;
        /* background-color: #cd00d8; */
        margin:auto;
        margin-left: 600px;
}
.nav>li {
    position: relative;
    float: left;
    width: 120px;
    text-align: center;
}

.nav li a {
    display: block;
    width: 100%;
    height: 100%;
    color: #ffffff;
}
.nav li a:hover{
    background-color: rgba(136,171,218,0.7);
}

.nav ul {
    display: none;
    position: absolute;
    width: 117px;
    background-color: rgba(136,171,218,0.7);

    border-left: 2px solid  rgba(136,171,218,0.7);
    border-right: 2px solid  rgba(136,171,218,0.7);
}

.nav ul li {
    border-bottom: 2px solid rgba(136,171,218,0.7);
}
.nav ul li:hover{
    background-color: rgba(136,171,218,0.5);
}