.header-content {
    border-bottom: none !important;
}

.user-guide-menu-toggle {
    border-bottom: none !important;
}

nav li:hover {
    color: #666 !important;
    background: #fff !important;
}

nav li a:hover {
    color: #666 !important;
    text-decoration: underline !important;
}

@media ( max-width : 768px) {
    .logo-link {
        margin-right: -7.5em !important;
    }
    nav li {
        margin: 10px 0;
        border-bottom: none !important;
    }
    .userGuideUS, .english, .simplified, .traditional, .help {
        position: relative;
        top: 3px;
    }
}
.separator {
    margin: 0 5px; /* 控制竖线左右间距 */
    color: #333;   /* 竖线颜色 */
}


@media ( max-width : 540px) {
    .logo-link {
        margin-right: -10em !important;
    }
}