/*記事1*/
/* ~コンセプト紹介 ~ */
header .logo {
  width: 140px;
  margin: 0.5rem auto 0;
  font-size: 1.5em;
}

header .logo a {
  width: 100%;
}

header .logo a img {
  display: inline-block;
}

#concept .container {
  max-width: 950px;
}

#concept .concept_img {
  width: 90%;
  width: auto;
  margin: auto;
  margin: 0;
}

#concept .concept_img img {
  z-index: 3;
  position: relative;
  object-fit: cover;
  height: 100%;
  width: 100%;
  margin-top: -5rem;
}

#concept .explanation {
  z-index: 7;
  position: relative;
  width: 55%;
  margin-top: -4%;
  padding: 3rem;
  padding: 2rem 4rem;
  background: #e9f7eb;
  background: #B2DAD5;
  background: #99CDC7;
  background: #CCE6E3;
}

#concept .explanation h3 {
  color: #666;
  font-weight: normal;
  font-size: 3rem;
  letter-spacing: 1rem;
  text-align: right;
  line-height: 4.5rem;
}

#concept .explanation p {
  font-size: 1.8rem;
  line-height: 3rem;
  letter-spacing: 0.8rem;
  margin-right: -30px;
  text-align: left;
  margin-bottom: 1.5rem;
}

#concept .button5 a {
  width: 45%;
  font-size: 2rem;
  padding: 1rem 0;
  background: #e9f7f2;
  background: #e9f7eb;
  background: #CCE6E3;
  background: #E5F2F1;
  background: #B2DAD5;
  background: #99CDC7;
  background: #ebffeb;
}

#concept .concept_button a:after {
  width: 25px;
  height: 19px;
}

/*サイトの横幅が780px以下*/
@media screen and (max-width: 780px) {

  #concept .button5 a {
    font-size: 1.6rem;
  }

  #concept .concept_button a:after {
    width: 17px;
    height: 12.5px;
  }

  #concept .explanation h3 {
    letter-spacing: 0.8rem;
  }

  #concept .explanation p {
    font-size: 1.6rem;
    line-height: 2.5rem;
    letter-spacing: 0.7rem;
  }

}

/*サイトの横幅が600px以下*/
@media screen and (max-width: 600px) {

  #concept {
    padding-top: 2rem;
  }

  #concept .explanation {
    width: auto;
    margin-top: 2rem;
    border-radius: 0.5rem;
  }

  #concept .explanation h3 {
    letter-spacing: 0.5rem;
  }
}

/*サイトの横幅が450px以下*/
@media screen and (max-width: 450px) {

  #concept .explanation p {
    letter-spacing: 0.4rem;
    font-size: 1.4rem;
  }

  #concept .button5 a {
    width: 65%;
  }
}

/*サイトの横幅が380px以下*/
@media screen and (max-width: 380px) {

  #concept .explanation {
    padding: 2rem;
  }

  #concept .explanation p {
    font-size: 1.4rem;
    line-height: 2.3rem;
  }

  #concept .explanation h3 {
    font-size: 3rem;
    letter-spacing: 0.4rem;
  }

  #concept .button5 a {
    font-size: 1.4rem;
  }

}

/*サイトの横幅が330px以下*/
@media screen and (max-width: 330px) {

  #concept .explanation h3 {
    letter-spacing: 0.2rem;
    padding-bottom: 1rem;
  }

  #concept .explanation p {
    font-size: 1.1rem;
    line-height: 1.8rem;
  }
}