* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-size: 0.28rem;
}

.box {
  background: #dfebff;
  width: 4.8rem;
  height: 4.8rem;
  margin: 2rem auto;
  border-radius: 50%;
  position: relative;
  box-shadow: 0 -0.06rem 1rem rgba(0, 0, 0, 0.1) inset, 0 0 0.2rem rgba(0, 0, 0, 0.1);
}

.set-box {
  text-align: center;
}

.set-box input {
  height: 0.6rem;
  width: 1.8rem;
  text-align: center;
}

.set-box button {
  height: 0.6rem;
  width: 0.8rem;
}

.calibration {
  position: relative;
  width: 100%;
  height: 100%;
}

.calibration span {
  position: absolute;
  margin-left: 0.22rem;
  margin-top: 0.21rem;
}

.pointer {
  top: 0.9rem;
  left: 0.9rem;
  position: absolute;
  width: 3rem;
  height: 3rem;

}

.pointer span {
  display: block;
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: #dde9ff;
  box-shadow: 0 -0.06rem 0.5rem rgba(0, 0, 0, 0.1) inset, 0 0 0.1rem rgba(0, 0, 0, 0.1);
  text-align: center;
  line-height: 3rem;
  font-size: 0.56rem;
  z-index: 2;
}

.pointer i {
  position: absolute;
  height: 3rem;
  width: 0;
  background: red;
  left: 50%;
  top: 0;
  transition: 0.5s;
  z-index: 0;
}

.pointer i:before {
  position: absolute;
  content: '';
  width: 0;
  height: 0;
  margin-left: -0.1rem;
  bottom: -0.2rem;
  border-top: 0.26rem solid #000;
  border-left: 0.1rem solid transparent;
  border-right: 0.1rem solid transparent;
}			.tisp {
  font-size:0;
  position: absolute;
  left:0;
  right:0;
  bottom:0.32rem;
  text-align: center;
}
.tisp i{
  display: inline-block;
  width: 0.24rem;
  height: 0.24rem;
  background: #61d6d0;
  box-shadow: 0.01rem 0.02rem 0.06rem rgba(0,0,0,0.3) inset;
  border-radius: 50%;
  margin: 0 0.2rem;
}
.tisp i:last-child{
  background: #fda8a8;
}