@media screen and (min-width: 1000px) {
        body #chat_window .chat_box .menu .top { background-position: 0 -50px;width: 50px;height: 50px;background-size: 50px auto; }
        body #chat_window .chat_box .chat_item { width: 50px;height: 50px; }
        body #chat_window .chat_box .chat_item::before { font-size: 28px; }   
    }