@charset "utf-8";
.btn-top {
  position: fixed;
  right: 30px;
  bottom: 30px;
  background: #af875f;
  border-radius: 50%;
  width: 50px;
  height: 50px;
}
.btn-top span {
  position: relative;
  display: block;
  width: 50px;
  height: 50px;
  cursor: pointer; /*クリックしたら動くためのトリガー*/
}
.btn-top span::before {
  content: "";
  display: block;
  position: absolute;
  top: 20px;
  left: 0;
  right: 0;
  margin: auto;
  width: 18px;
  height: 18px;
  border-top: 4px solid #ffffff;
  border-left: 4px solid #ffffff;
  -webkit-transform: rotate(45deg);
  transform: rotate(45deg);
}