.product-detail__quantity-selector
  .quantity-selector__rules
  span
  + span::before {
  content: " + ";
}


.product-detail__quantity-selector 
  .quantity-selector__info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.quantity-selector__inventory_quantity{
  display: none;
}

.quantity-selector__inventory_quantity.show{
  display: block;
}

.quantity-selector__inventory_quantity .tip {
  display: none;
}
.quantity-selector__inventory_quantity .tip.show {
  display: block;
}

.quantity-selector__inventory_quantity .tip::before {
  content: "i";
  display: inline-block;
  width: 24px;
  height: 24px;
  margin-right: 8px;
  color: #FFFFFF;
  font-size: 16px;
  line-height: 24px;
  text-align: center;
  border-radius: 50%;
  background-color: #F03E3E;
}