.top_site_menu {
    background-color: #f8f8f8;
    border-bottom: 1px solid #eaeaea;
    height: 40px;
    line-height: 40px;
    font-size: 16px;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 9999;
}

.top_site_menu .inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.top_site_menu ul {
    display: flex;
    justify-content: center;
    margin: 0;
    padding: 0;
}

.top_site_menu li {
    list-style: none;
    margin-left: 20px;
    margin-right: 20px;
}

.top_site_menu li:first-child {
    margin-left: 0;
}

.top_site_menu a {
    color: #666;
    text-decoration: none;
    transition: color 0.2s ease;
}

.top_site_menu a:hover {
    color: #0066cc;
}

@media (max-width: 768px) {
    .top_site_menu {
        height: auto;
        line-height: normal;
        padding: 8px 0;
    }
    
    .top_site_menu ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .top_site_menu li {
        margin: 4px 10px;
    }
}