.system{
  margin: 0 0 3rem;
}
.system:last-child{
  margin-bottom: 0;
}
@media screen and (max-width: 768px) {
  .system{
    margin: 0 0 2rem;
  }
  .system:last-child{
    margin-bottom: 0;
  }
  }

.system_inner {
  background-color: rgba(0, 0, 0, 0.8);
  padding: 3rem 0;
}
@media screen and (max-width: 768px) {
  .system_inner {
    padding: 1rem 0;
    margin: 0;
  }
}

.system_price {
  background-color: rgba(255, 255, 255, 0.1);
  margin: 0 3rem;
  padding: 0 0;
}
@media screen and (max-width: 768px) {
  .system_price {
    margin: 0 1rem;
    padding: 0 0;
  }
}

.system h2 {
  width: 25%;
  margin: 0 auto 5rem;
}
@media screen and (max-width: 768px) {
  .system h2 {
    width: 40%;
    margin: 0 auto 2rem;
  }
}

.price {
  width: 80%;
  margin: 0 auto 0;
}
@media screen and (max-width: 768px) {
  .price {
    width: 90%;
    margin: 0 auto 0;
  }
}

.price2 {
  width: 70%;
  margin: 0 auto 0;
}
@media screen and (max-width: 768px) {
  .price2 {
    width: 80%;
  }
}

.option{
  width: 100%;
  margin: 3rem auto 0;
}
@media screen and (max-width: 768px) {
  .option{
    width: 100%;
    margin: 1rem auto 0;
  }
}

.haken{
  width: 60%;
  margin: 3rem auto 0;
}
@media screen and (max-width: 768px) {
  .haken{
    width: auto;
    margin: 1rem 1rem 0;
  }
}

.system_text {
  padding: 3rem 0 0;
  text-align: left;
  min-width: 320px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
@media screen and (max-width: 768px) {
  .system_text {
    padding: 2rem 0 0;
  }
}

.system_text h3 {
  padding: 0 0 1rem;
  font-weight: normal;
  font-size: 1.8rem;
}
@media screen and (max-width: 768px) {
  .system_text h3 {
    font-size: 1.5rem;
  }
}

.system_text p {
  padding: 0 0 1.8rem;
}

.caution {
  width: 48%;
}
@media screen and (max-width: 768px) {
  .caution {
    width: 100%;
  }
}
.reserve {
  width: 48%;
}
@media screen and (max-width: 768px) {
  .reserve {
    width: 100%;
  }
}

.credit {
  border: 1px solid #666666;
  padding: 10px 20px 15px;
  text-align: center;
}

.credit h4 {
  font-size: 20px;
  font-weight: normal;
  margin: 0 0 5px;
}

.credit img {
  max-width: 300px;
  width: 80%;
  height: auto;
  margin: 10px 0 0;
}