.about_menu {
    margin-bottom: 20px;
}

.page-wrap-left {
    display: none;
}

.page-wrap-right {}

.xypg-left-nav {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}

.xypg-left-nav>li {
    border-bottom: none;
    display: inline-block;
}

.xypg-left-con {
    border: none;
}

.first-nav-btn {
    display: none;
}