html .chat-footer{z-index:99;background:#fff;width:calc(100% - 340px);padding-top:8px;display:flex;position:fixed;bottom:0;left:340px}html .chat-footer-collapse{width:calc(100% - 72px);left:72px}@media screen and (max-width:1080px){html .chat-footer{width:100%;left:0}}