.c_concept {
  overflow: hidden;
}

.c_concept .c_concept__content-wrapper {
  position: relative;
  padding: 100px 0 100px;
  z-index: 1;
}

@media screen and (max-width: 749px) {
  .c_concept .c_concept__content-wrapper {
    padding: 30px 24px;
  }
}

.c_concept .c_concept__background-text {
  content: "";
  position: absolute;
  width: 75%;
  height: 100%;
  top: -56px;
  left: 50%;
  transform: translateX(-50%);
  z-index: -1;
}

@media screen and (max-width: 749px) {
  .c_concept .c_concept__background-text {
    width: 100%;
    max-width: 500px;
    top: 26%;
  }
}

.c_concept .c_concept__background-text img {
  width: 100%;
  height: auto;
  animation: 200s linear infinite rotation;
}

@keyframes rotation{
  0%{ transform:rotate(0);}
  100%{ transform:rotate(360deg); }
}

.c_concept .c_concept__title {
  color: rgb(var(--color-foreground));
  /* pc/h2 */
  font-family: "Noto Sans JP";
  font-size: 20px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
  letter-spacing: 2px;
  margin-left: 46%;
  margin-top: 16px;
  margin-bottom: 16px;
}

@media screen and (max-width: 749px) {
  .c_concept .c_concept__title {
    margin-left: 0;
  }
}


@media screen and (min-width: 750px) {
  .c_concept .c_concept__item-wrapper {
    width: 100%;
    display: flex;
    flex-direction: row-reverse;
    justify-content: flex-end;
    gap: 5.8%;
    margin-top: 50px;
  }

}

.c_concept .c_concept__richtext {
  min-width: 300px;
  width: 27.8%;
  color: rgb(var(--color-foreground));
  /* pc/本文 */
  font-family: "Noto Sans JP";
  font-size: 15px;
  font-style: normal;
  font-weight: 400;
  line-height: 200%; /* 30px */
  letter-spacing: 1.5px;
}

@media screen and (max-width: 749px) {
  .c_concept .c_concept__richtext {
    width: 100%;
    font-size: 14px;
    letter-spacing: 1.4px;
    min-width: 200px;
  }
}

.c_concept .c_concept__img-wrapper {
  width: 50%;
  height: auto;
  margin-top: 76px;
}

@media screen and (max-width: 749px) {
  .c_concept .c_concept__img-wrapper {
    width: 86.6%;
    max-width: 400px;
    margin-left: -24px;
    margin-top: 40px;
  }
}

.c_concept .c_concept__img-wrapper img {
  width: 100%;
  height: auto;
}