.index_head {
    height: 100px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    box-shadow: 0px 4px 4px 0px rgba(0,0,0,.04);
    -webkit-box-shadow: 0px 4px 4px 0px rgba(0,0,0,.04);
    -moz-box-shadow: 0px 4px 4px 0px rgba(0,0,0,.04);
    -ms-box-shadow: 0px 4px 4px 0px rgba(0,0,0,.04);
    z-index: 9999999;
    background: #FFF;
}
.index_head_c {
    height: 80px;
}
.logo {
    width: 205px;
    height: 48px;
    padding: 8px 0;
    float: left;
    margin-top: 2px;
}

.logo img {
    display: block;
    float: left;
}

.nav {
    float: left;
    height: 80px;
    margin-left: 170px;
}
.nav_list, #drop_down1 {
    display: inline-block;
    float: left;
    /* margin-left: 60px; */
    position: relative;
    margin-left: 33px;
}
.nav_list i, #drop_down1 i {
    line-height: 100px;
    font-size: 17px;
    color: #666;
    font-style: normal;
}
.nav_list label, #drop_down1 label {
    position: absolute;
    height: 3px;
    background-color: #00aeff;
    transition: all .5s;
    opacity: 0;
    left: 50%;
    bottom: -3px;
    width: 0;
}
.login {
    float: right;
    overflow: hidden;
    padding-top: 30px;
}