#fix_nav{
    display: block;
    position: fixed;
    z-index: 999;
    bottom: 0;
    width: 100%;
    color: #909090;
    background-color: #fefefe;
    text-align: center;
    padding: 1% 0;
}

#fix_nav .bize_ctg {
    width: 16%;
    display: inline-block;
    margin-left: 4%;
    margin-right: 2%;
}
#fix_nav .bize_ctg img{
    max-width: 100px;
    height: 1.3em;
    margin-top: 5%;
    margin-left: 15px;
    margin-right: 15px;
}

#fix_nav span {
    font-size: 12px;
}

#fix_nav .hidden_menu{
    display: none;
    opacity: 0;
    transition: 0.4s ease-in-out;
    margin-bottom: 2%;
    padding-top: 1%;
}