@charset "utf-8";
.visually-hidden {
  position: fixed !important;
  top: 0px !important;
  left: 0px !important;
  width: 4px !important;
  height: 4px !important;
  opacity: 0 !important;
  overflow: hidden !important;
  border: none !important;
  margin: 0 !important;
  padding: 0 !important;
  display: block !important;
  visibility: visible !important;
  } 
/* body */
body{
  background-color: FAF8F8;
  color: #152245;
  font-size: 20px;
  overflow-x: hidden;
}
main{
  margin-top: 100px;
}
header{
  padding-bottom: 100px;
}
/* 設立時の沿革 */
.history_timeline{
  margin-bottom: 150px;
}
.history_timeline h1{
  font-size: 32px;
  text-align: center;
}
.main .history_timeline .line1{
  margin: -4vw 20vw 100px 0vw;
}
#rounded-box{
  background: #F3503E;
  width: 700px;
  height: auto;
  border-radius: 15px;
  display: flex;
  align-items: center;
  margin: 0 auto;
  margin-top: 50px;
  padding: 50px;
}
#rounded-box p{
  color: #fff;
  margin: 0 auto;
  font-size: 20px;
}

/* 年表 */
.chronology .history{
  padding: 24px 0 150px;
  background-image: url(../images/history_line.png);
  background-repeat: no-repeat ;
  background-size: 10px 100%;
  background-position: 50% -10px;
}
.chronology .group{
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
}
.chronology .group .content_history1{
  width: calc((100% - 150px) /2);
  padding-left: 20px;
  background-color: transparent;
  font-weight: normal;
  margin-top: 200px;
}
.chronology .group .explanation1 p{
  margin-top: 50px;
  font-size: 20px;
}
.chronology .group .explanation1 p::before{
  content: '・';
  margin-left: -1em;
}
.chronology .group .explanation1::after{
  content: '';
  display: block;
  width: 250px;
  aspect-ratio: 4/3;
  margin-top: 10px;
  background: url(../images/history_pic1.jpg) no-repeat center/cover;
}
.chronology .group:nth-child(1) .explanation1::after{
  display: none;
}
.chronology .group:nth-child(2) .explanation1::after{
  background: url(../images/history_pic1.png) no-repeat center/cover;
}
.chronology .group:nth-child(3) .explanation1::after{
  background: url(../images/history_pic3.png) no-repeat center/cover;
}
.chronology .group:nth-child(4) .explanation1::after{
  background: url(../images/history_pic4.png) no-repeat center/cover;
}
.chronology .group:nth-child(5) .explanation1::after{
  display: none;
}
.chronology .group:nth-child(6) .explanation1::after{
  background: url(../images/history_pic6.png) no-repeat center/cover;
}
.chronology .group:nth-child(7) .explanation1::after{
  display: none;
}
.chronology .group:nth-child(8) .explanation1::after{
  background: url(../images/history_pic9.png) no-repeat center/cover;
}
.chronology .group:nth-child(9) .explanation1::after{
  background: url(../images/history_pic10.png) no-repeat center/cover;
}
.chronology .group:nth-child(10) .explanation1::after{
  background: url(../images/history_pic12.png) no-repeat center/cover;
}
/* ボール */
.chronology .group .bar{
  display: inline-block;
  width:150px;
  height: 150px;
  margin-top: 50px;
  background-color: #F3503E;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  font-size: 50px;
}
.chronology .group .bar_none{
  visibility: hidden;
}
.chronology .group .history_flex{
  width: calc((100% - 150px) /2);
  padding-right: 20px;
  margin-top: 300px;
}
.chronology .group .history_flex .explanation2 p{
  margin-top: 100px;
  font-size: 20px;
}
.chronology .group .history_flex .explanation2 p::before{
  content: '・';
  margin-left: -1em;
}
.chronology .group .history_flex .explanation2::after{
  content: '';
  display: block;
  width: 250px;
  aspect-ratio: 4/3;
  margin: 10px 0 0 auto;
  background: url(../images/history_pic1.jpg) no-repeat center/cover;
}
.chronology .group:nth-child(1) .explanation2::after{
  display: none;
}
.chronology .group:nth-child(2) .explanation2::after{
  background: url(../images/history_pic2.png) no-repeat center/cover;
}
.chronology .group:nth-child(3) .explanation2::after{
  display: none;
}
.chronology .group:nth-child(4) .explanation2::after{
  display: none;
}
.chronology .group:nth-child(5) .explanation2::after{
  display: none;
}
.chronology .group:nth-child(6) .explanation2::after{
  background: url(../images/history_pic5.png) no-repeat center/cover;
}
.chronology .group:nth-child(7) .explanation2::after{
  background: url(../images/history_pic8.png) no-repeat center/cover;
}
.chronology .group:nth-child(8) .explanation2::after{
  display: none;
}
.chronology .group:nth-child(9) .explanation2::after{
  background: url(../images/history_pic11.png) no-repeat center/cover;
}
.chronology .group:nth-child(10) .explanation2::after{
  background: url(../images/history_pic13.png) no-repeat center/cover;
}
.group .history_flex .content_history2>p{
  margin-top: 50px;
}
.fadeIn_up1 {
  opacity: 0;
  transform: translate(0, 50%);
  transition: 1s;
}
.fadeIn_up1.is-show {
  transform: translate(0, 0);
  opacity: 1;
}
.fadeIn_up2 {
  opacity: 0;
  transform: translate(0, 50%);
  transition: 3s;
}
.fadeIn_up2.is-show {
  transform: translate(0, 0);
  opacity: 1;
}
.fadeIn_up3 {
  opacity: 0;
  transform: translate(0, 50%);
  transition: 4s;
}
.fadeIn_up3.is-show {
  transform: translate(0, 0);
  opacity: 1;
}
.fadeIn_up4 {
  opacity: 0;
  transform: translate(0, 30%);
  transition: 2s;
}
.fadeIn_up4.is-show {
  transform: translate(0, 0);
  opacity: 1;
}
/* ----------------- 祝賀会 ---------------- */
.party_txt{
  margin: 50px auto 20px auto;
  display: flex;
  justify-content: center;
  width: 37.5vw;
  min-width: 540px;
}
.party h1{
  font-size: 32px;
  text-align: center;
}
.line2{
  margin: -2.5vw 15vw 50px -40vw;
}
.party_container{
  margin: 0 auto;
  width: 37.5vw;
  min-width: 540px;
}
.party_flex{
  height: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 2.77vw;
  justify-content: center;
  margin-bottom: 150px;
  }
.item{
  width: 250px;
  height: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.item_img{
  width: 100%;
  height: auto;
}
.item_img img{
  width: 100%;
  height: auto;
} 
/*------------------ 50周年冊子 ------------------*/
.booklet_sec{
  width: 100%;
  margin-bottom: 150px;
}
.booklet_sec h2{
  margin: 0 auto;
  margin-bottom: 50px;
  width: 14em;
  border-bottom: 1px solid;
  border-image: linear-gradient(to right,#1B6098 0%,#FAF8F8 100%);
  border-image-slice: 1;
  font-size: 28px;
  position: relative;
}
.booklet_sec h2::before {
  content: '';
  width: 10px;
  height: 30px;
  background-color: #1B6098;
  border-radius: 10px;
  display: block;
  position: absolute;
  left: -16px;
  bottom: 3px;
}
.booklet_sec h3{
  text-align: center;
  font-weight: bold;
  font-size: 24px;
  margin-bottom: 20px;
}
.booklet_sec_inner{
  position: relative;
  height: 600px;
}
.booklet_bg{
  height: 100%;
  overflow: hidden;
}
.booklet_bg1 {
  width: 100%;
  height: 100%;
  padding-right: 30px;
  position: absolute;
  left: 0;
  top: 0;
  z-index: 100;
}
.booklet_bg1 img{
  width: 100%;
  height: 100%;
  opacity: .95;
}
.booklet_bg2 {
  width: 100%;
  height: 100%;
  padding-top: 20px;
  padding-left: 40px;
  position: absolute;
  bottom: -20px;
  right: 0;
  z-index: 10;
}
.booklet_bg2 img{
  width: 100%;
  height: 100%;
}

/***********************/
.booklet{
  width: 70%;
  max-width: 840px;
  margin: 0 auto;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50% , -50%);
  z-index: 1000;
  text-align: left;
}
.booklet_flex{
  display: flex;
  height: 100%;
  gap: 60px;
  margin: 0 auto;
  justify-content: center;
  align-items: center;
}
.booklet .is-show {
  opacity: 1;
}
.booklet_pic{
  width: calc((100% - 60px) / 2);
}
.booklet img{
  width: 100%;
}
.booklet_txt{
  width: calc((100% - 60px) / 2);
  color: #fff;
  width: 28vw;
  opacity: 0;
}
.booklet_txt .show{
  opacity: 1;
  transform: translateY(0);
}
/* アニメーション */
.slide_left{
  transition: 2s cubic-bezier(0.75, 0, 0.25, 1);
  transform: translateX(calc(-50vw - 50%));
}
.slide_right{
  transition: 1.5s cubic-bezier(0.75, 0, 0.25, 1);
  transform: translateX(calc(50vw + 50%));
}
.show{
  transform: translateX(0);
}
.zigyokei_btn{
  background-color: #F3503E;
  border: 2px solid #F3503E;
  box-shadow: 0 4px 0 #d01a0a;
  width: 280px;
  height: 60px;
  border-radius: 15px;
  color: #fff;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 50px 0 0 auto;
  transition:background-color 0.3s ease,
  color 0.3s ease,
  transform 0.3s ease;
}

.zigyokei_btn:hover {
  transform: translateY(4px);
  box-shadow: none;
}
.footer_line {
  padding-bottom: 50px;
}
/* レスポンシブ */
@media screen and (max-width:1300px){
  .booklet{
    width: 90%;
  }
  .booklet_flex{
    gap: 30px;
  }
  .booklet_txt{
    width: 100%;
  }
  .booklet_pic img{
    width: 100%;
    height: auto;
  }
}
@media screen and (max-width:900px){
  body{
    font-size: 16px;
  }
}
@media screen and (max-width:650px){
  #rounded-box{
    width: auto;
    height: auto;
    border-radius: 15px;
    display: flex;
    align-items: center;
    margin: 50px 20px 0 20px;
  }
  #rounded-box{
    margin-top: 50px;
    padding: 10px;
  }
  #rounded-box p{
    padding: min(10px, 10px);
  }
  .chronology .history{
    background-position: 53px -20px;
  }
  .chronology .group{
    flex-direction: column;
    margin: 0;
  }
  .chronology .group dt{
    order: 1;
  }
  .chronology .group dd{
    order: 0;
  }
  .chronology .group .explanation1{
    order: 1;
  }
  .chronology .group .explanation1 p{
    margin-top: 0;
  }
  .chronology .group div{
    order: 2;
  }
  .chronology .group .bar{
    width: 75px;
    height: 75px;
    margin-left: 20px;
    font-size: 20px;
  }
  .chronology .group .content_history1{
    width: calc(100% - 155px);
    margin-top: 50px;
    padding-left: 0;
  }
  .chronology .group .history_flex{
    width: 100%;
    padding-top: 50px;
    margin-top: 0;
  }
  .chronology .group .explanation1::after{
    margin-top: 10px;
  }
  .chronology .group .history_flex{
    padding-top: 10px;
  }
  .chronology .group .history_flex .explanation2::after{
    margin-left: 0;
    margin-top: 20px;
  }
  .zigyokei_btn{
    width: 230px;
    height: 50px;
    font-size: 18px;
    margin: 50px auto 0;
  }
  .content_history1{
    margin-left: 100px;
  }
  .content_history2{
    margin-left: 100px;
  }
  .chronology .group .bar_none{
    display: none;
  }
  .shift{
    padding-top: 0;
  }
  .party_txt{
    width: 90%;
    min-width: 320px;
  }
  .party_container{
    margin: 0 auto;
    width: 37.5vw;
    min-width: 250px;
  }
  .booklet_sec h2{
    font-size: 32px;
  }
  .booklet_sec h2::before {
    width: 8px;
    height: 25px;
  }
  .booklet_flex{
    display: block;
    width: 100%;
  }
  .booklet_flex img{
    width: 100%;
    padding: 0 80px 20px 80px;
  }
  .booklet_txt{
    width: 80%;
    padding-bottom: 2rem;
    margin: 0 auto;
  }
  .booklet_pic{
    width: 100%;
    text-align: center;
    margin-top: 30%;
  }
  .booklet_pic img{
    width: 30.769vw;
    margin: 0 auto 24px;
    display: block;
    padding: 0;
  }
  .party_txt{
    width: auto;
    min-width: none;
    padding: 0 20px;
    height: auto;
  }
  .booklet_bg1{
  padding-right: 30px;
}
  .booklet_bg2 {
    padding-top: 40px;
    bottom: -100px;
    padding-left: 20px;
  }
    .fadeIn_up1,
    .fadeIn_up2,
    .fadeIn_up3{
      opacity: 1;
      transform: translate(0, 0);
      transition: none;
    }
    
    .chronology .group .explanation1::after,
    .chronology .group .history_flex .explanation2::after{
      max-width: 250px;
      width: 100%;
    }
    .chronology .group .content_history1{
      width: calc(100% - 100px);
      padding-right: 20px;
    }
    .zigyokei_btn{
      width: 200px;
      height: 40px;
      font-size: 16px;
    }
    .history_timeline h1{
      font-size: 24px;
    }
    .party h1{
      font-size: 24px;
    }
    .booklet_sec h2{
      font-size: 22px;
    }
    .booklet_sec h3{
      font-size: 20px;
    }
    #rounded-box p{
      font-size: 16px;
    }
    .chronology .group .explanation1 p{
      font-size: 16px;
    }
    .chronology .group .history_flex .explanation2 p{
      font-size: 16px;
    }
  }