ul.stdesctabul {
    margin: 0;
    padding: 0;
    border-bottom: 1px solid #a3a3a3;
    width: 100%;
}

ul.stdesctabul li {
    display: inline;
}

ul.stdesctabul li a {
    display: inline-block;
    padding: 7px 12px 7px 12px;
    margin-right: 0;
    border-left: solid 1px #a3a3a3;
    border-top: solid 1px #a3a3a3;
    background-color: #f4f4f4;
    font-weight: bold;
    cursor: pointer;
}

ul.stdesctabul li:last-child a {
    border-right: solid 1px #a3a3a3;
}

#stdesctabbodys .stdesctabbody{
    display: none;
}

#stdesctabbodys div:first-child {
    display: block;
}