body {
  margin:0;
  padding:0;
  background:linear-gradient(to right,lightyellow,red);
}

.tip_box {
  border:5px solid black;
  width:500px;
  height:600px;
  margin: 50px auto 0;
  border-radius: 30px;
  overflow:hidden;
  background-color:#ffff;
}

.title {
  background:grey;
  overflow:hidden;
}

.result {
  background:grey;
}