dghd_miniapp/pages/index/index.wxss

.title{
  text-align: center;
  margin-top: 30px;
  font-size: 18px;
  font-weight: bold;
  color: #222;
}
.btn_box{
  width: 90%;
  margin: 0 auto;
  background: #1296db;
  color: #ffffff;
  font-size: 14px;
  text-align: center;
  height: 35px;
  border-radius: 3px;
  line-height: 35px;
  position: absolute;
  bottom: 100px;
}