@charset "UTF-8";
body{
  font-family: 'Hiragino Kaku Gothic ProN','ヒラギノ角ゴ ProN W3', sans-serif;
  color:#333;
}
.container {
  max-width: 1170px;
  margin: 0 auto;
  padding: 0 30px;
}
.header{
  padding: 50px 0;
  text-align: center;
}
.header__logo{
  display: block;
  margin: 0 auto 50px;
  width: fit-content;
}
.main-visual__image img{
  display: block;
  width: 100%;
  margin-bottom: 40px;
}
.header__nav{
  margin-bottom: 40px;
}
.header__nav-list{
  display: flex;
  justify-content: center;
  gap: 80px;
}
.header__nav-item{
  font-size: 1.125rem;
  line-height: 1.125rem;
  letter-spacing: 0.1em;
}
.header__nav-item:hover{
  opacity: 0.8;
  transition: opacity 0.3s;
}
.concept{
  display: flex;
  justify-content: center;
  margin-bottom: 100px;
}
.concept__image img{
  width: 100%;
  max-width: 555px;
}
.concept__content{
  width: 555px;
  padding-left: 40px;
  display: flex;
  justify-content: center;
  flex-direction: column;
}
.concept__subtitle{
  font-size: 1rem;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}
.concept__title{
  font-size: 2rem;
  font-weight: bold;
  color: #24A8BF;
  letter-spacing: 0.1em;
  margin-bottom: 30px;
}
.concept__text{
  font-size: 1rem;
  line-height: 29px;
  letter-spacing: 0.1em;
}
.blog__heading{
  text-align: center;
  margin-bottom: 30px;
}
.blog__heading-title{
  font-size: 2rem;
  font-weight: bold;
  color: #24A8BF;
  letter-spacing: .08em;
  margin-bottom: 8px;
}
.blog__heading-subtitle{
  font-size: 0.8125rem;
  font-weight: bold;
  letter-spacing: 0.3em;
}
.blog__list{
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
}
.blog__card{
  width: calc(33.33% - 20px);
  margin-bottom: 30px;
}
.blog__card:hover{
  opacity: 0.8;
  transition: opacity 0.3s;
}
.blog__card-img{
  width: 100%;
  margin-bottom: 12px;
}
.blog__card-title{
  font-size: .875rem;
  font-weight: bold;
  line-height: 1.3rem;
  margin-bottom: 6px;
}
.blog__card-date{
  font-size: .75rem;
  letter-spacing: 0.05em;
}
.blog__more-btn{
  display: block;
  width: 220px;
  border: solid 1px #24A8BF;
  border-radius: 3px;
  padding: 18px;
  margin: 0 auto 50px;
  font-size: .875rem;
  font-weight: bold;
  text-align: center;
  color: #24A8BF;
  position: relative;
  transition: background-color 0.3s, color 0.3s;
}
.blog__more-btn::after{
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: #24A8BF;
  clip-path: polygon(0% 0%, 100% 50%, 0% 100%);
  transition: transform 0.3s, background-color 0.3s;
  position: absolute;
  top: 50%;
  right: 18px;
  transform: translateY(-50%);
}
.blog__more-btn:hover {
  background-color: #24A8BF;
  color: #fff;
}
.blog__more-btn:hover::after {
  background-color: #fff;
}
.footer{
  background-color: black;
}
.footer__logo{
  text-align: center;
  padding: 70px 0 50px;
}
.footer__copyright{
  display: block;
  text-align: center;
  font-size: .725rem;
  color: #888;
  padding-bottom: 30px;
}

@media screen and (max-width: 767px){
  .container {
    padding: 0 1.25rem;
  }
  .header{
    padding-top: 1.875rem;
  }
  .header__logo{
    margin-bottom: 1.875rem;
  }
  .header__logo img{
    width: 10rem;
  }
  .main-visual__image img{
    margin-bottom: 1.875rem;
  }
  .header__nav{
    margin-bottom: 4.375rem;
  }
  .header__nav-list{
    gap: 3.125rem;
  }
  .concept{
    display: block;
    margin-bottom: 5.625rem;
  }
  .concept__image img{
    max-width: 100%;
  }
  
  .concept__content{
    width: auto;
    padding: 1.875rem 1.25rem 0;
  }
  .concept__subtitle{
    margin-bottom: .9375rem;
  }
  .concept__title{
    font-size: 1.625rem;
    margin-bottom: 1.25rem;
  }
  .blog__heading-title{
    font-size: 1.875rem;
    margin-bottom: 3px;
  }
  .blog__list{
    gap: 0;
  }
  .blog__card{
    width: 100%;
    margin-bottom: .625rem;
  }
  .blog__card-img{
    margin-bottom: .75rem;
  }
  .blog__card-title{
    margin-bottom: 2px;
  }
  .blog__more-btn{
    width: 100%;
  }
  .blog__more-btn:hover {
    background-color: #fff;
    color: #24A8BF;
  }
  .blog__more-btn:hover::after {
    background-color: #24A8BF;
  }
  .footer__logo{
    padding-top: 3.75rem;
  }
  .footer__logo img{
    width: 26.6%;
  }
  .footer__copyright{
    font-size: .625rem;
    padding-bottom: 1.25rem;
  }  
}