body #chat_window .chat_box .menu #go_top {display: none !important;opacity: 0;}
    @media screen and (min-width: 1001px) {
        body #chat_window {right: 15px;bottom: 45px;}
        body #chat_window .chat_box .chat_item {width: 52px;height: 52px;}
        body #chat_window .chat_box .chat_item::before {font-size: 32px;}
    }
    @media screen and (max-width: 1000px) {
        body #chat_window {bottom: 122px  !important;}
        body #chat_window .chat_box .chat_item {width: 48px;height: 48px;}
        body #chat_window .chat_box .chat_item::before {font-size: 28px;}
    }