* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  color: #ffffff;
  font-family: "Noto Sans JP", sans-serif;
  font-style: normal;
}

main {
  background-color: #000000;
  min-height: 100vh;
  padding: 40px 0;
  position: relative;
}

a {
  text-decoration: none;
}

img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

ul,
li {
  list-style: none;
}

.sp-only {
  display: none;
}

.lang__switch__area {
  position: absolute;
  right: 40px;
  top: 40px;
}

.lang__switch__wrap {
  position: relative;
  display: inline-block;
}

.lang__switch {
  appearance: none;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 1em;
  background-color: unset;
  padding: 4px 20px 4px 8px;
  cursor: pointer;
  border-radius: 4px;
  background-color: #000000;
}

.lang__switch__wrap::after {
  content: "";
  width: 5px;
  height: 5px;
  border-top: 1px solid #fff;
  border-right: 1px solid #fff;
  -webkit-transform: rotate(135deg);
  transform: rotate(135deg);
  display: inline-block;
  position: absolute;
  top: 0;
  bottom: 0;
  right: 10px;
  margin: auto;
  pointer-events: none;
}

.top {
  margin: 60px auto 146px;
  padding: 0 40px;
}
.top .main__text {
  text-align: center;
  margin-bottom: 20px;
  font-size: 32px;
}
.top .main__img__wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0 auto 30px;
  background-image: url(../../assets/img/main_img.png);
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
  min-height: 420px;
}
.top .main__img__wrapper .overtext {
  mix-blend-mode: difference;
}
.top .app__name {
  max-width: 412px;
  margin: 0 auto 60px;
}
.top .app__links {
  display: flex;
  align-items: center;
  justify-content: center;
}
.top .app__links a {
  max-height: 44px;
  height: 44px;
  width: 100%;
  margin: 0 14px;
}
.top .app__links a:first-child {
  max-width: 132px;
}
.top .app__links a:last-child {
  max-width: 150px;
}

@media only screen and (max-width: 780px) {
  .pc-only {
    display: none;
  }
  .sp-only {
    display: block;
  }
  .lang__switch__area {
    right: 20px;
    top: 30px;
  }
  .top {
    margin: 60px auto 60px;
    padding: 0 5vw;
  }
  .top .main__text {
    font-size: 22px;
  }
  .top .main__img__wrapper {
    background-image: none;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-position: center;
    min-height: unset;
  }
  .top .main__img__wrapper::after {
    content: "";
    display: block;
    width: 300px;
    height: 300px;
    background-image: url(../../assets/img/main_img.png);
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
  }
  .top .main__img__wrapper .overtext {
    margin-bottom: 20px;
  }
  .top .app__name {
    max-width: 412px;
    margin: 0 auto 80px;
  }
  .top .app__links a {
    margin: 0 16px;
  }
}
.introduction {
  margin: 0 auto 120px;
}
.introduction h2 {
  font-weight: 500;
  text-align: center;
  font-size: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 150px;
}
.introduction h2 span {
  padding-bottom: 4px;
}
.introduction h2::before {
  content: "";
  display: block;
  width: 40px;
  height: 40px;
  background-image: url(../../assets/img/icon_arrow.png);
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
  margin-right: 20px;
}
.introduction .group__items {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
}
.introduction .group__items li {
  display: flex;
  align-items: center;
  justify-content: space-evenly;
}
.introduction .group__items li .text__wrapper {
  margin-right: 100px;
  max-width: 440px;
}
.introduction .group__items li .text__wrapper .heading__en {
  text-align: left;
  font-size: 66px;
  font-weight: 300;
  margin-bottom: 16px;
  letter-spacing: 0px;
  color: #ffffff;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  flex-direction: column;
}
.introduction .group__items li .text__wrapper .heading__en::after {
  content: "";
  display: block;
  width: 426px;
  height: 1px;
  background-color: #ff0000;
}
.introduction .group__items li .text__wrapper .heading__jp {
  font-size: 60px;
  font-weight: 300;
}
.introduction .group__items li .text__wrapper .text {
  text-align: left;
  font-weight: 300;
  font-size: 16px;
  margin-bottom: 28px;
}
.introduction .group__items li .img__wrapper {
  width: 100%;
  max-width: 520px;
}
.introduction .group__items li .img__wrapper img {
  max-width: 520px;
}
.introduction .group__items li:nth-child(2) {
  margin-top: -2vw;
  margin-bottom: 140px;
  flex-direction: row-reverse;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.introduction .group__items li:nth-child(2) .text__wrapper {
  margin-right: 0;
  margin-left: 100px;
}
.introduction .group__items li:nth-child(2) .text__wrapper .heading__en {
  align-items: flex-end;
  text-align: right;
}
.introduction .group__items li:nth-child(2) .text__wrapper .heading__en::after {
  width: 370px;
}
.introduction .group__items li:nth-child(2) .text__wrapper .heading__jp {
  font-size: 60px;
  text-align: right;
  font-weight: 300;
}
.introduction .group__items li:nth-child(2) .text__wrapper .text {
  text-align: right;
  font-weight: 300;
  font-size: 16px;
  margin-bottom: 28px;
}
.introduction .group__items li:last-child {
  margin-bottom: 0;
}

@media only screen and (max-width: 780px) {
  .introduction {
    margin: 0 auto 70px;
  }
  .introduction h2 {
    font-size: 22px;
    flex-direction: column-reverse;
    margin: 0 auto 60px;
    max-width: 390px;
  }
  .introduction h2 span {
    padding-bottom: 20px;
  }
  .introduction h2::before {
    margin-right: 0;
  }
  .introduction .group__items {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
  }
  .introduction .group__items li {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: 52px;
  }
  .introduction .group__items li .text__wrapper {
    margin-right: 0;
    width: 100%;
    padding: 0 20px;
  }
  .introduction .group__items li .text__wrapper .heading__en {
    text-align: left;
    font-size: 48px;
    margin-bottom: 16px;
    letter-spacing: 0px;
    color: #ffffff;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    flex-direction: column;
  }
  .introduction .group__items li .text__wrapper .heading__en::after {
    content: "";
    display: block;
    max-width: 344px;
    width: 100%;
    height: 1px;
    background-color: #ff0000;
  }
  .introduction .group__items li .text__wrapper .heading__jp {
    font-size: 48px;
    font-weight: 300;
  }
  .introduction .group__items li .text__wrapper .text {
    text-align: left;
    font-weight: 300;
    font-size: 16px;
    margin-bottom: 28px;
  }
  .introduction .group__items li .img__wrapper {
    width: 100%;
    display: flex;
    justify-content: flex-end;
    max-width: none;
  }
  .introduction .group__items li .img__wrapper img {
    max-width: 344px;
  }
  .introduction .group__items li:nth-child(2) {
    margin-top: 0;
    margin-bottom: 52px;
    flex-direction: column;
    display: flex;
    align-items: center;
    justify-content: flex-end;
  }
  .introduction .group__items li:nth-child(2) .text__wrapper {
    margin-right: 0;
    margin-left: 0;
  }
  .introduction .group__items li:nth-child(2) .text__wrapper .heading__en {
    align-items: flex-end;
    text-align: right;
  }
  .introduction .group__items li:nth-child(2) .text__wrapper .heading__en::after {
    max-width: 272px;
  }
  .introduction .group__items li:nth-child(2) .text__wrapper .heading__jp {
    font-size: 48px;
    text-align: right;
    font-weight: 300;
  }
  .introduction .group__items li:nth-child(2) .text__wrapper .text {
    text-align: right;
    font-weight: 300;
    font-size: 16px;
    margin-bottom: 28px;
  }
  .introduction .group__items li:nth-child(2) .img__wrapper {
    justify-content: flex-start;
  }
}
footer {
  padding: 0 100px 24px;
}
footer .app__name {
  max-width: 340px;
  margin: 0 auto 45px;
}
footer .title {
  text-align: center;
  margin: 0 auto 90px;
  font-size: 32px;
  font-weight: 300;
}
footer .app__links {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 80px;
}
footer .app__links a {
  max-height: 44px;
  height: 44px;
  width: 100%;
  margin: 0 30px;
}
footer .app__links a:first-child {
  max-width: 132px;
}
footer .app__links a:last-child {
  max-width: 150px;
}
footer .footer__links {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
footer .footer__links .links__wrapper {
  display: flex;
  justify-content: flex-start;
  align-items: center;
}
footer .footer__links .links__wrapper a {
  font-size: 16px;
  margin-right: 45px;
  font-weight: 300;
}
footer .footer__links .copyright {
  font-size: 16px;
  font-weight: 300;
}

@media only screen and (max-width: 780px) {
  footer {
    padding: 0 20px 24px;
  }
  footer .app__name {
    max-width: 288px;
    margin: 0 auto 42px;
  }
  footer .title {
    margin: 0 auto 54px;
    font-size: 22px;
  }
  footer .app__links {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 80px;
  }
  footer .app__links a {
    max-height: 44px;
    height: 44px;
    width: 100%;
    margin: 0 30px;
  }
  footer .app__links a:first-child {
    max-width: 132px;
  }
  footer .app__links a:last-child {
    max-width: 150px;
  }
  footer .footer__links {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  footer .footer__links .links__wrapper {
    display: flex;
    justify-content: flex-start;
    align-items: center;
  }
  footer .footer__links .links__wrapper a {
    font-size: 12px;
    margin-right: 45px;
    font-weight: 300;
  }
  footer .footer__links .copyright {
    font-size: 12px;
  }
}