.main-navigation ul {
    list-style: none;
    margin: 0;
    padding-left: 0;
    margin-top: 20px;
}
.copy-right {
    background-color: #0D1D31;
    display: none;
}
.inner-main-title {
    background-image: url(gena-project.ait.ac.th/);
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    background-position: center;
    height: 100px;
    display: none;
}
.nav>li>a {
    position: relative;
    display: block;
    padding: 10px 11px;
}
.main-navigation a {
    color: #666;
    display: block;
    padding: 10px 15px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 400;
    transition: all 0.5s ease 0s;
    -webkit-transition: all 0.5s ease 0s;
    -moz-transition: all 0.5s ease 0s;
    -o-transition: all 0.5s ease 0s;
    -ms-transition: all 0.5s ease 0s;
}
.main-navigation ul ul {
    float: left;
    position: absolute;
    left: -999em;
    z-index: 99999;
    background: #fff;
    text-align: left;
    box-shadow: 0 3px 3px rgba(0, 0, 0, 0.2);
    top: 20px;
}