#chat_window .chat_box #chat_box .chat_item::before { font-size: 48px;}
    #chat_window .chat_box #chat_box .chat_item { width: 80px; height: 80px;}
    body #chat_window .chat_box .menu a.top { width: 80px; height: 80px; background-size: 80px auto; background-position: 0 -80px;}
    @media screen and (max-width: 1000px) {
        #chat_window .chat_box #chat_box .chat_item::before { font-size: 30px;}
        #chat_window .chat_box #chat_box .chat_item { width: 60px; height: 60px;}
        body #chat_window .chat_box .menu a.top { width: 60px; height: 60px; background-size: 60px auto; background-position: center -60px !important;}
    }