a {
  color: var(--color-4);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 1px;
}

a:hover {
  color: var(--color-main);
  text-decoration: underline;
}

.nav-link {
  display: block;
  padding: .5rem .5rem;
}

a.nav-link {
  text-decoration: none;
  transition: transform 0.3s ease;
}

a.nav-link:hover {
  color: var(--color-main);
  transform: translateY(-3px);
  text-shadow: 0px 3px 0 rgba(0, 0, 0, 0.3);
}

a.tn_link {
  text-decoration: none;
}

a.tn_link:hover {
  text-decoration: none;
}

.wrap {
  position: relative;
  overflow: hidden;
}

.wrap::before {
  content: "";
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: -1;
  background-size: 50% auto;
  background-position: 0 0;
  background-repeat: repeat;
  background-image: url(../img/common/bg.png);
  animation: scrollDiagonal 30s linear infinite;
}

@keyframes scrollDiagonal {
  from {
    background-position: 0 0;
  }

  to {
    background-position: 100% -100%;
  }
}

section {
  margin: 0 0 6rem;
}

.content {
  position: relative;
  width: 90%;
  max-width: 900px;
  margin: 0 auto;
  background-color: var(--color-0);
}

.inner {
  width: 90%;
  margin: 0 auto;
  padding: 4rem 0;
}

.heading {
  position: relative;
  width: 100%;
  padding: .7rem 3rem 1rem;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  color: #fff;
  font-family: "Oswald", sans-serif;
  font-weight: 500;
  font-style: normal;
  font-size: 4rem;
  vertical-align: middle;
  line-height: 1;
  background-repeat: no-repeat;
  background-size: 8.5% auto;
  background-position: top -1rem right -1.5%;
  background-color: #000;
  overflow: hidden;
}

.heading-text-jp {
  padding: .3rem 0 0 1em;
  font-size: 38%;
  letter-spacing: 0.05em;
}

.sub-heading {
  width: 100%;
  margin: 0 0 2rem;
}

.sub-heading p {
  display: inline-block;
  padding: .8rem 1.4rem 1rem;
  text-align: left;
  font-size: 20px;
  font-weight: 600;
  line-height: 1;
  background-color: #000;
}

.frame {
  position: relative;
  padding: 3rem;
  margin: 0 0 3rem;
}

.frame:last-child {
  margin: 0;
}

.button {
  position: relative;
  width: 220px;
}

.button-m {
  margin: 0 2rem 0 0;
}

.button a::before {
  content: "";
  display: block;
  padding-top: 28%;
}

.button a {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  width: 100%;
  padding: 0 0 0 20%;
  color: #fff;
  font-size: 14px;
  letter-spacing: 0.05em;
  font-weight: 500;
  text-decoration: none;
  background-color: #000;
  background-repeat: no-repeat;
  background-size: 13% auto, 4% auto;
  background-position: center left 3%, center right 4%;
  transition: all 0.3s;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.3);
}

.off {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  width: 100%;
  padding: 0 0 0 20%;
  color: #666;
  font-size: 14px;
  letter-spacing: 0.05em;
  font-weight: 500;
  text-decoration: none;
  background-color: #000;
  background-repeat: no-repeat;
  background-size: 13% auto, 4% auto;
  background-position: center left 3%, center right 4%;
  background-image: url(../img/common/b-off.png), url(../img/common/a-off.png);
}

.off::before {
  content: "";
  display: block;
  padding-top: 28%;
}


@media screen and (min-width: 1px) and (max-width: 743px) {
  .pc_display {
    display: none;
  }

  .pc {
    display: none;
  }

  .wrap::before {
    background-size: 375px 200px;
    background-position: 0 0;
    background-repeat: repeat;
    background-image: url(../img/common/bg-sp.png);
    animation: scrollDiagonal 20s linear infinite;
  }

  @keyframes scrollDiagonal {
    from {
      background-position: 0 0;
    }

    to {
      background-position: 375px -200px;
    }
  }

  section {
    margin: 0 0 3rem;
  }

  .content {
    width: 94%;
  }

  .inner {
    padding: 2rem 0;
  }

  .heading {
    padding: .7rem 1rem 1rem;
    font-size: 8.4vw;
    background-size: 16% auto;
    background-position: top -.7rem right -3%;
  }

  .sub-heading {
    margin: 0 0 1.5rem;
  }

  .sub-heading p {
    display: inline-block;
    line-height: 1.2;
    padding: .6rem 1rem .7rem;
    font-size: 4vw;
  }

  .frame {
    padding: 2rem;
    margin: 0 0 2rem;
  }

  .button {
    position: relative;
    width: 80%;
    max-width: 240px;
  }

  .button-m {
    margin: 0 2rem 0 0;
  }

  .button a::before {
    padding-top: 30%;
  }

  .button a {
    font-size: 3.6vw;
  }

  .off {
    font-size: 3.6vw;
  }

  .off::before {
    padding-top: 30%;
  }

}

@media screen and (min-width: 744px) and (max-width: 1024px) {
  .sp_display {
    display: none;
  }

  .pc {
    display: none;
  }

  .wrap::before {
    background-size: 60% auto;
  }

  @keyframes scrollDiagonal {
    from {
      background-position: 0 0;
    }

    to {
      background-position: 100% -100%;
    }
  }

  section {
    margin: 0 0 4rem;
  }


  .heading {
    padding: .7rem 2rem 1rem;
  }

  .button {
    position: relative;
    width: 30%;
  }

  .button a::before {
    padding-top: 30%;
  }

  .button a {
    font-size: 1.6vw;
  }

  .off {
    font-size: 1.6vw;
  }

  .off::before {
    padding-top: 30%;
  }

}

@media screen and (min-width: 1025px) {
  .sp_display {
    display: none;
  }

  .sp {
    display: none;
  }

  .sp_br {
    display: none;
  }

  @keyframes scrollDiagonal {
    from {
      background-position: 0 0;
    }

    to {
      background-position: 100% -100%;
    }
  }

  .button a:hover {
    color: #fff;
    transform: translate(4px, 4px);
    box-shadow: 4px 4px 0 rgba(0, 0, 0, 0);
  }

  .alpha a {
    display: block;
  }

  .alpha a:hover img {
    opacity: 0.7;
    filter: alpha(opacity=70);
    -ms-filter: "alpha(opacity=70)";
  }

  .alpha a {
    display: block;
  }

  .alpha a:hover img {
    opacity: 0.7;
    filter: alpha(opacity=70);
    -ms-filter: "alpha(opacity=70)";
  }

  a.btn_over img {
    -webkit-transition: -weblit-transform 0.3s;
    -o-transition: -o-transform 0.3s;
    -webkit-transition: -webkit-transform 0.3s;
    transition: -webkit-transform 0.3s;
    -o-transition: transform 0.3s;
    transition: transform 0.3s;
    transition: transform 0.3s, -webkit-transform 0.3s;
  }

  a.btn_over img:hover {
    -webkit-transform: scale(1.1);
    -ms-transform: scale(1.1);
    transform: scale(1.1);
  }
}