.main-content {
  padding-bottom: 76px;
}

.introduction {
  padding-top: 56px;
  padding-bottom: 56px;
}

@media only screen and (min-width: 48.0625em) {
  .introduction {
    padding-top: 80px;
    padding-bottom: 80px;
  }
}

.introduction__inner {
  position: relative;
  width: 92%;
  margin-right: 4%;
  margin-left: 4%;
}

@media only screen and (min-width: 66.63859em) {
  .introduction__inner {
    width: 100%;
    max-width: 980px;
    margin-right: auto;
    margin-left: auto;
  }
}

.introduction__img {
  max-width: 200px;
  margin-right: auto;
  margin-left: auto;
}

.introduction__img img {
  width: 100%;
}

@media only screen and (min-width: 48.0625em) {
  .introduction__img {
    max-width: 260px;
  }
}

.concept {
  padding-top: 48px;
  padding-bottom: 48px;
  background-color: #F4F3F3;
}

@media only screen and (min-width: 48.0625em) {
  .concept {
    padding-top: 64px;
    padding-bottom: 64px;
  }
}

.concept__inner {
  position: relative;
  width: 92%;
  margin-right: 4%;
  margin-left: 4%;
}

@media only screen and (min-width: 66.63859em) {
  .concept__inner {
    width: 100%;
    max-width: 980px;
    margin-right: auto;
    margin-left: auto;
  }
}

.concept__section + .concept__section {
  margin-top: 48px;
}

@media only screen and (min-width: 48.0625em) {
  .concept__section + .concept__section {
    margin-top: 80px;
  }
}

.concept__header {
  text-align: center;
}

.concept__heading1 {
  color: #D4003B;
  font-size: 1.8rem;
  font-weight: bold;
}

@media only screen and (min-width: 48.0625em) {
  .concept__heading1 {
    font-size: 2.4rem;
  }
}

.concept__heading2 {
  font-size: 1.8rem;
}

@media only screen and (min-width: 48.0625em) {
  .concept__heading2 {
    font-size: 2.4rem;
  }
}

.concept__lead-text {
  font-size: 1.2rem;
}

@media only screen and (min-width: 48.0625em) {
  .concept__lead-text {
    font-size: 1.4rem;
  }
}

.concept__content {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: stretch;
  -ms-flex-align: stretch;
  align-items: stretch;
  -webkit-box-pack: start;
  -ms-flex-pack: start;
  justify-content: flex-start;
  margin-top: 22px;
}

@media only screen and (min-width: 48.0625em) {
  .concept__content {
    margin-top: 32px;
  }
}

.concept__box {
  -webkit-box-flex: 1;
  -ms-flex: 1;
  flex: 1;
  padding: 24px 16px;
  background-color: #fff;
}

.concept__box + .concept__box {
  margin-left: 5px;
}

@media only screen and (min-width: 48.0625em) {
  .concept__box {
    padding: 60px 80px;
  }
}

.concept__box-title {
  font-size: 1.6rem;
  font-weight: bold;
}

@media only screen and (min-width: 48.0625em) {
  .concept__box-title {
    font-size: 1.8rem;
  }
}

.concept__box-text {
  font-size: 1.2rem;
}

.concept__box-text span {
  display: block;
}

.concept__box-text span + span {
  margin-top: 10px;
}

.concept__box-title + .concept__box-text {
  margin-top: 12px;
}

@media only screen and (min-width: 48.0625em) {
  .concept__box-text {
    font-size: 1.4rem;
  }
  .concept__box-title + .concept__box-text {
    margin-top: 16px;
  }
}