.clearfix:after {
  content: "";
  clear: both;
  display: block;
}
main {
  height: 2000px;
}
/* jewelry */
#jewelry {
  position: fixed;
  right: 10px;
  bottom: 10px;
  display: table;
  border-collapse: separate;
}
#scroll_btn_box p {
  display: table-cell;
  vertical-align: middle;
  text-align: center;
  border-radius: 50px;
  width: 50px;
  height: 50px;
  color: #ffffff;
  background-color: gray;
  cursor: pointer;
}