#container .about_us_tab{
    width: 100%;
    border-bottom: 1px solid #ccc;
    height: 50px;
    display: flex;
    list-style: none;
}
#container .about_us_tab li{
    padding: 0;
    transform: translateY(1px);
    border-top: 1px solid #ccc;
    border-left: 1px solid #ccc;
    border-right: 1px solid #ccc;
    width: 160px;
    height: 100%;
}
#container .about_us_tab li:first-child{
    border-right: none;
}
#container .about_us_tab li.on a{
    color: #000;
    background: #fff;
}

#container .about_us_tab li a{
    display: inline-block;
    width: 100%;
    height: 100%;
    text-align: center;
    color: #afafaf;
    background: #f4f4f4;
    text-decoration: none;
    line-height: 49px;
    font-size: 22px;
    font-weight: bold;
}

.about_tab_txt{
    display: none;
    border: 1px solid #ccc;
    border-top: none;
    padding: 30px 20px;
}
.about_tab_txt.on{display: block;}

#container .about_tab_txt h3{
    margin-bottom: 20px;
}

#container .about_tab_txt .about_more_wrap{
    width: 100%;
    display: flex;
    /* justify-content: center; */
}

#container .about_tab_txt .about_more{
    margin: 40px auto 0;
    display: inline-block;
    width: 180px;
    height: 40px;
    border: 1px solid #bec0c3;
    font-size: 16px;
    font-weight: 700;
    line-height: 240%;
    color: #555;
    text-align: center;
    text-decoration: none;
}

@media (max-width: 767px) {
    #container .about_us_tab li {
        width: 50%;
    }
}