.back-to-top {
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  position: fixed;
  right: 40px;
  bottom: 152px;
}

.footer {
  font-family: Kanit, Kanit;
  font-weight: 400;
  font-size: 16px;
  color: #333333;
  line-height: 22px;
  text-align: center;
  margin: 48px 0;
}
.pt {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-bottom: 12px;
}
.pt p span {
  border: 1px solid #637051;
}

@media (max-width: 400px) {
  .back-to-top {
    right: 20px;
    bottom: 80px;
  }
  .footer {
    font-size: 12px;
    line-height: 16px;
    margin: 48px 0 24px 0;
  }
}
.icon-back:before {
  font-size: 40px;
  color: #388e3c;
}
@media (max-width: 345px) {
  .icon-back:before {
    font-size: 30px;
  }
}