#inp_url {
  width: 300px;
}
.zone_conn {
  margin-left: 20px;
  margin-top: 20px;
}
.zone_send {
  clear: both;
  margin-left: 20px;
  margin-top: 20px;
}
.zone_send textarea {
  width: 430px;
}
#btn_send {
  width: 430px;
}
.list_emoji {
  float: left;
  list-style: none;
  margin: 4px 4px;
}
#div_msg {
  overflow-y: auto;
}
.clearboth {
  color: gray;
  clear: both;
  margin-left: 20px;
  padding-top: 5px;
}
.div_msg > div:last-child {
  /* 你的样式 */
  display: none !important;
}