p{
  font-family :
	YuMincho,    /* Mac用 */
	'Yu Mincho', /* Windows用 */
	serif;
}

._sp{
  display: none;
}
@media screen and (max-width: 768px){
  ._sp{
    display: block;
  }
  ._pc{
    display: none;
  }
}

body{
  background-color: #000;
}

button{
  background-color: transparent;
  border: none;
  cursor: pointer;
  outline: none;
  padding: 0;
  appearance: none;
}

.hamburger {
  width: 32px;
  height: 23px;
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 100;
}

.hamburger_bar {
  display: block;
  width: 100%;
  height: 3px;
  position: absolute;
  border-radius: 6px;
  left: 0;
  background: #BEBEBE;
  transition: top 0.24s, transform 0.24s, opacity 0.24s;
}

.hamburger_bar:nth-child(1) {
  top: 0;
}

.hamburger_bar:nth-child(2) {
  top: 50%;
  transform: translateY(-50%);
}

.hamburger_bar:nth-child(3) {
  top: 100%;
  transform: translateY(-100%);
}

.hamburger_bar.is_active:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(135deg);
}

.hamburger_bar.is_active:nth-child(2) {
  transform: translate(50%, -50%);
  opacity: 0;
}

.hamburger_bar.is_active:nth-child(3) {
  top: 50%;
  transform: translateY(-50%) rotate(-135deg);
}

.sp_nav.is_active {
  opacity: 1;
  pointer-events: auto;
}

.sp_nav{
  position: fixed;
  top: 0;
  left: 0;
  z-index: 99;
  width: 100%;
  height: 100%;
  overflow: auto;
  background: url(../../img/common/nav_bg.png) no-repeat center;
  background-size: cover;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.24s;
  pointer-events: none;
}
.sp_nav_wrap{
  padding: 30vw 0;
  display: flex;
  flex-direction: column;
  gap: 13vw;
  text-align: center;
}
.sp_nav_list img{
  width: auto;
  height: 18px;
}

.pc_nav{
  background-color: #000;
  border-bottom: 1px solid #CECECE;
  padding: 1.6vw 0 1.4vw;
  box-shadow: 0 3px 8px #000;
  position: fixed;
  z-index: 999;
}
.pc_nav_wrap{
  display: flex;
  justify-content: flex-start;
  gap: 1.9vw;
  width: 80%;
  padding-left: 5.3%;
}
.pc_nav_list{
  line-height: 1;
}
.pc_nav_list a{
  transition: 0.3s;
}
.pc_nav_list a:hover{
  opacity: 0.7;
}

@media screen and (max-width: 768px){
  .pc_nav{
    display: none;
  }
}

.wrap{
  background-color: #000;
  padding-top: 5vw;
}
@media screen and (max-width: 768px){
  .wrap{
    padding-top: 0;
  }
}

.introduction{
  padding-top: 20vw;
  position: relative;
}
.introduction::before{
  content: "";
  display: block;
  position: absolute;
  top: 0;
  z-index: 1;
  width: 100%;
  height: 42.8vw;
  background: url(../img/about/bg-top.png) no-repeat top;
  background-size: cover;
}
.introduction::after{
  content: "";
  display: block;
  position: absolute;
  bottom: -19vw;
  right: 0;
  z-index: 1;
  width: 39vw;
  height: 47.5vw;
  background: url(../img/about/intro-rightback.png) no-repeat top right;
  background-size: contain;
}
.ttl_intro{
  width: 24%;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}
.correlation{
  position: relative;
  z-index: 2;
  width: 80%;
  margin: 4.4vw auto 0;
}
.subttl_intro{
  width: 58%;
  margin: 5.8% auto 0;
  position: relative;
  z-index: 2;
}
.txt_intro{
  font-size: 1.2vw;
  line-height: 2;
  font-weight: 300;
  color: #fff;
  letter-spacing: 0.07em;
  width: 68%;
  margin: 4.8% auto 0;
  position: relative;
  z-index: 2;
}
@media screen and (max-width: 768px){
  .introduction{
    padding: 22% 0 0;
  }
  .introduction::before{
    content: "";
    display: block;
    position: absolute;
    top: 0;
    z-index: 1;
    width: 100%;
    height: 45vw;
    background: url(../img/about/bg-top.png) no-repeat top;
    background-size: cover;
  }
  .introduction::after{
    display: none;
  }
  .ttl_intro{
    width: 50%;
    margin: 0 auto;
  }
  .correlation{
    position: relative;
    z-index: 2;
    width: 98%;
    margin: 5.5vw auto 0;
  }
  .tap{
    width: 43.5%;
    margin: 2.6vw auto 0;
  }
  .subttl_intro{
    width: 66%;
    margin: 12% auto 0;
  }
  .txt_intro{
    font-size: 16px;
    line-height: 1.8;
    font-weight: 300;
    color: #fff;
    letter-spacing: 0.07em;
    width: 87%;
    margin: 15.5% auto 0;
  }
}

.txt_red{
  color: #DE001A;
}

.story{
  padding: 13% 0 6%;
  position: relative;
  overflow: hidden;
}
.story::before{
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  transform: skewY(-4deg) translateY(14%);
  background: url(../img/about/story_bg.png) no-repeat center;
  background-size: cover;
  z-index: 1;
}
.story::after{
  content: "";
  display: block;
  background: url(../img/about/bear.png) no-repeat;
  background-size: contain;
  width: 14.3vw;
  height: 14.4vw;
  position: absolute;
  top: 2.4vw;
  left: 5.4vw;
  z-index: 2;
}
.ttl_stroy{
  width: 10%;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}
.txt_story{
  font-size: 1.2vw;
  line-height: 2;
  font-weight: 300;
  letter-spacing: 0.07em;
  width: 67%;
  margin: 5.5% auto 0;
  position: relative;
  z-index: 2;
}
@media screen and (max-width: 768px){
  .story{
    padding: 43% 0 12%;
  }
  .story::before{
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    transform: skewY(-4deg) translateY(14%);
    background: url(../img/about/story_bg.png) no-repeat center;
    background-size: cover;
    z-index: 1;
  }
  .story::after{
    content: "";
    display: block;
    background: url(../img/about/bear.png) no-repeat;
    background-size: contain;
    width: 33.6vw;
    height: 33.6vw;
    position: absolute;
    top: 3vw;
    left: auto;
    right: 4.5vw;
    z-index: 2;
  }
  .ttl_stroy{
    width: 22%;
    margin: 0 auto;
  }
  .txt_story{
    font-size: 16px;
    line-height: 1.8;
    font-weight: 300;
    letter-spacing: 0.07em;
    width: 87%;
    margin: 11.7% auto 0;
  }
}

.img-wrap{
  display: flex;
  flex-wrap: wrap;
  width: 100%;
}
.img-wrap img{
  width: calc(100% / 4);
}
@media screen and (max-width: 768px){
  .img-wrap img{
    width: calc(100% / 2);
  }
}