caiping/public/static/mobile/css/temporary_detail.css

#followBtn {
  padding: 10px 16px;
  background-color: #409eff;
  color: white;
  border: #409eff;
  border-radius: 5px;
  cursor: pointer;
  position: absolute;
  right: 4.2vw;
  margin-top: -2.8vw;
  font-size: 14px;
}

#followBtn.followed {
  background-color: #f0f9eb;
  border: 1px solid #67c23a;
  color: #71c647;
  font-size: 14px;
}