@charset "UTF-8";


/* ABOUT ====================== */
.about_main_ttl{
  font-size: 2.4rem;
  font-weight: 400;
  padding: 1rem 0;
}
.about_main_desc{
  font-size: 1.2em;
  font-weight: 300;
  line-height: 1.9;
  letter-spacing: .05em;
  padding: 1rem 0;
}
.about_main_img{
  display: block;
  width: 95%;
  margin: 2em auto;
}

@media (min-width: 768px) {
  .sec_about_under_key{
    position: relative;
  }
  .about_main_desc{
    max-width: 40rem;
  }
  .about_main_ttl_wrap{
    position: absolute;
    left: 3rem;
    top: 8rem;
  }
  .about_main_img{
    width: 42%;
    margin: 0 10% 0 auto;
  }
}/* 768 end */


/* ABOUT - FEATURE ================*/
.about_feat_block{
  padding-bottom: 5rem;
  overflow: hidden;
}
.about_feat_num{
  display: block;
  width: 100%;
  padding: 1rem 0;
}
.about_feat_num img{
  width: 4.8rem;
}
.about_ttl_wrap{
  text-align: center;
  padding: 1rem 0;
}
.about_feat_ttl{
  font-size: 1.9em;
  font-weight: 400;
  width: 100%;
  padding: 1rem 0 1.5rem;
  letter-spacing: 0.02em;
}

.about_detail_wrap{
  overflow: hidden;
  background-color: var(--color-set-a);
}
.about_feat_desc{
  font-size: clamp(11px,1.1rem,18px);
  font-family: sans-serif;
  font-weight: 300;
  /* text-align: justify; */
  line-height: 1.9;
  letter-spacing: .03em;
  padding: 2rem;
  color: #fff;
  overflow: hidden;

  margin-top: -100%;
  opacity: 0;
  transition: margin-top .4s , opacity .6s .3s;
}

.about_feat_num,
.about_feat_ttl,
.about_ttl_wrap .feat_pc_btn{
  opacity: 0;
  transition: opacity .8s;
}
.on .about_feat_num,
.on .about_feat_ttl,
.on .about_ttl_wrap .feat_pc_btn{
  opacity: 1;
}

@media (max-width: 767px) {
  .about_detail_wrap.on .about_feat_desc{
    margin-top: 0;
    opacity: 1;
  }
}/* end */

@media (min-width: 768px) {
  /* WHITE MASK ================== */
  .about_feat_box{
    position: relative;
  }
  .about_feat_box::after{
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 100%;
    height: 100%;
    background-color: #fff;
    z-index: 10;
    transition: transform 1s;
  }
  .regular.about_feat_box::after{
    transform-origin: right;
  }
  .reverse.about_feat_box::after{
    transform-origin: left;
  }
  .about_feat_box.on::after{
    transform: scaleX(0);
  }

  /* about_feat_box_inner ================== */
  .about_feat_box_inner{
    position: relative;
    padding-top: 39.0625%;
  }
  .about_feat_box_inner::after{
    content: "";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -5;
    background-size: contain;
  }
  .regular .about_feat_box_inner::after{
    background-position: top right;
  }
  .reverse .about_feat_box_inner::after{
    background-position: top left;
  }
  .inner_1::after{
    background-image: url(/img/about_1.jpg);
  }
  .inner_2::after{
    background-image: url(/img/about_2.jpg);
  }
  .inner_3::after{
    background-image: url(/img/about_3.jpg);
  }
  .inner_4::after{
    background-image: url(/img/about_4.jpg);
  }
  .inner_5::after{
    background-image: url(/img/about_5.jpg);
  }
  .inner_6::after{
    background-image: url(/img/about_6.jpg);
  }
  .inner_7::after{
    background-image: url(/img/about_7.jpg);
  }

  /* about_ttl_wrap ================ */
  .about_ttl_wrap,
  .about_detail_wrap{
    position: absolute;
    width: 39.0625%;
    height: 100%;
    top: 0;
    z-index: 1;
    background-color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: start;
    padding: 0;
    cursor: pointer;
  }
  .regular .about_ttl_wrap,
  .regular .about_detail_wrap{
    left: 48%;
  }
  .reverse .about_ttl_wrap,
  .reverse .about_detail_wrap{
    right: 48%;
  }

  .about_ttl_wrap::before,
  .about_ttl_wrap::after,
  .about_detail_wrap::before,
  .about_detail_wrap::after{
    content: "";
    position: absolute;
    display: block;
    height: 100%;
    top: 0;
    background-position: center;
  }

  .regular .about_ttl_wrap::before,
  .regular .about_detail_wrap::before{
    width: 100%;
    left: -100%;
    background-color: #fff;
  }
  .regular .about_detail_wrap::before{
    background-color: var(--color-set-a);
  }

  .regular .about_ttl_wrap::after,
  .regular .about_detail_wrap::after{
    width: 10%;
    right: -10%;
    background-image: url(/img/about_bg_curb_pc_1.svg);
  }
  .regular .about_detail_wrap::after{
    background-image: url(/img/about_bg_curb_pc_3.svg);
  }
  
  .reverse .about_ttl_wrap::before,
  .reverse .about_detail_wrap::before{
    width: 100%;
    right: -100%;
    background-color: #fff;
  }
  .reverse .about_detail_wrap::before{
    background-color: var(--color-set-a);
  }
  .reverse .about_ttl_wrap::after,
  .reverse .about_detail_wrap::after{
    width: 10%;
    left: -10%;
    background-image: url(/img/about_bg_curb_pc_1.svg);
    transform: scaleX(-1);
  }
  .reverse .about_detail_wrap::after{
    background-image: url(/img/about_bg_curb_pc_3.svg);
  }

  .about_ttl_wrap{
    transition: transform .6s .2s;
  }
  .regular .about_ttl_wrap{
    transform: translateX(-30%);
  }
  .reverse .about_ttl_wrap{
    transform: translateX(30%);
  }
  .on .about_ttl_wrap{
    transform: translateX(0);
  }

  .about_feat_num,
  .about_feat_ttl,
  .about_ttl_wrap .feat_pc_btn{
    transition: opacity .8s .4s;
  }

  /* heart btn */
  .feat_pc_btn{
    display: block;
    width: 5.4rem;
    padding: .5rem 1rem;
    margin: 0 auto;
    cursor: pointer;
  }
  .about_ttl_wrap .feat_pc_btn{
    filter: var(--filter-p);
  }
  .about_detail_wrap .feat_pc_btn{
    filter: var(--filter-w);
  }

  /* about_ph_wrap ================ */
  .about_ph_wrap{
    position: absolute;
    width: 46.875%;
    height: 100%;
    top: 0;
    /* border-radius: 0 8.3333333% 8.3333333% 0 / 0 50% 50% 0; */
    overflow: hidden;
    z-index: 3;
    transition: transform .5s;
  }
  .regular .about_ph_wrap{
    left: 0;
    transform: translateX(-20%);
  }
  .reverse .about_ph_wrap{
    right: 0;
    transform: translateX(20%);
  }
  .about_ph_wrap img{
    height: 100%;
    width: auto;
  }
  .on .about_ph_wrap{
    transform: translateX(0);
  }

  /* about_detail_wrap ================ */
  .about_detail_wrap{
    z-index: 2;
    background-color: var(--color-set-a);
    overflow: visible;
    transition: transform .5s;
  }
  .regular .about_detail_wrap{
    transform: translateX(-150%);
  }
  .reverse .about_detail_wrap{
    transform: translateX(150%);
  }
  .pc_open .about_detail_wrap{
    transform: translateX(0);
  }

  .about_feat_desc{
    font-size: 1.15rem;
    line-height: 2;
    padding: 1rem 3rem ;
    margin-top: 0;
    transition: opacity .4s .3s;
  }
  .pc_open .about_feat_desc{
    margin-top: 0;
    opacity: 1;
  }

  .about_detail_wrap .feat_pc_btn{
    opacity: 0;
    transition: opacity .4s .3s;
  }
  .pc_open .about_detail_wrap .feat_pc_btn{
    opacity: 1;
  }

}/* 768 end */