@charset "utf-8";

/**
 * ***************************************
 * ページ全体に関わるCSSの設定
 * ***************************************
 */
html *,
::before,
::after {
  box-sizing: border-box;
}
/* フォント */
html {
  font-size: 14px;
}
.pagetop {
  height: 50px;
  width: 50px;
  position: fixed;
  right: 30px;
  bottom: 30px;
  background-image: url(../images/back_btn.png);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2;
  transition: all 0.3s ease 0s;
}
.pagetop:hover{
  opacity: 0.6;
}


.sp{
  display: block;
}
.pc{
  display: none;
}
@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
  .sp{
    display: none;
  }
  .pc{
    display: block;
  }
}
body {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 400; /* Noto Sans JPのレギュラーウェイトを指定 */
}
/* おもな太字タグのフォントウェイト設定 */
h1, h2, h3, h4, h5, h6, th, strong {
  font-weight: 700;
}
/* ベースのリンクカラー */
a {
  color: #f30;
}
.ffsp{
  font-feature-settings: "palt";
}

/* レスポンシブイメージと画像下スペース防止 */
img {
  max-width: 100%;
  height: auto;
  vertical-align: bottom;/* 画像下のスペースを消す */
}

/**
 * ***************************************
 * ヘッダー
 * ***************************************
 *
 * ヘッダーコンテナ
 */
.page-header {
  border-top: 6px solid #000;
}
@media (min-width: 768px) {
  .header-container {
    margin: 0 auto;
    padding: 0 20px;
    max-width: 1040px;
  }
}

/**
 * ---------------------------------------
 * ヘッダーモジュール
 */

/* ヘッダーロゴとモバイルナビボタン */
.sitetitle {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
@media (min-width: 768px) {
  .sitetitle {
    display: block;
    padding: 0px 0 0 0;
    position:relative;
  }
}
/* ヘッダーロゴ */
.header-logo {
  margin: 0;/* h1のデフォルト設定オフ */
  padding-left: 15px;
  font-size: 0;/* 画像上下の余白を消すためh1の設定オフ */
  line-height: 0;/* 画像上下の余白を消すためh1のサイズオフ */
}
.header-logo img {
  width: 200px;
}
@media (min-width: 768px) {
  .header-logo {
    padding: 0;
    width: 300px;
  }
  .header-logo img {
    width: 300px;
  }
  .header-container .sitetitle .back_btn_area{
    margin: 0 0 0 auto;
    width: 300px;
    position:absolute;
    top: 30px;
    right: 0px;
  }
  .header-container .sitetitle .back_btn_area .back_btn a{
    background-color: #5798CF;
    border-radius: 10px;
    border: 1px solid #5798CF;
    color: #fff;
    font-size: 90%;
    text-decoration: none;
    text-align: right;
    padding: 2% 15%;
  }
  .header-container .sitetitle .back_btn_area .back_btn a:hover{
    background-color: #fff;
    border: 1px solid #5798CF;
    color: #5798CF;
    transition: 0.3s;
  }
}
/* モバイル向けボタン */
.navbtn {
  display: block;
  width: 60px;
  height: 60px;
  background-image: url(../images/nav-mobile-open.svg);
  background-repeat: no-repeat;
  background-position: center center;
}
.navbtn.close {
  background-image: url(../images/nav-mobile-close.svg);
}
@media (min-width: 768px) {
  .navbtn {
    display: none;
  }
}
/* ヘッダーナビゲーション */
.header-nav {
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
  list-style: none;
}
.header-nav.collapse {
  display: none;
}
.header-nav li a {
  display: block;
  padding: 20px 30px;
  border-top: 1px solid #d8d8d8;
  background: #efefef;
  color: #000;
  text-decoration: none;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  font-weight: 400;
}
.header-nav li a:hover {
  background: #b8e5ea;
}
@media (min-width: 768px) {
  /* PC向けレイアウト */
  .header-nav {
    display: flex !important;
    flex-direction: row;
    justify-content: flex-end;
  }
  .header-nav li a {
    padding: 16px 0px 10px 0px;
    border-top: none;
    border-bottom: 4px solid transparent;
    background: none;
    width: 166px;
    text-align: center;
  }
  .header-nav li a:hover {
    border-bottom: 4px solid #000;
    background: none;
  }
}


/**
 * ***************************************
 * フッター
 * ***************************************
 *
 * フッターコンテナ
 */
.page-footer {
  background: #000;
}
.footer-container {
  padding: 60px 4%;
}
@media (min-width: 768px) {
  .footer-container {
      max-width: 1040px;
      margin: 0 auto;
      padding: 60px 20px;
  }
}

/**
 * ---------------------------------------
 * フッターモジュール
 */

/* コピーライト */
.copyright {
  font-size: .75rem;
  color:  #d8d8d8;
  text-align: center;
}

/**
 * ***************************************
 * メインコンテナ
 * ***************************************
 */

/* ホーム - ヒーローコンテナ */
.hero-container {
  position: relative;
}
/* ホーム - メインコンテナ */
.home .page-main {
  background: url(../images/main_bg-min.png);
  background-position: top;
  background-size: cover;
}
.home .main-container {
  padding: 30px 4%;
}
.home .main-container .section-contents{
  display: flex;
  flex-direction: column;
  margin: 2% auto;
}
.home .main-container .section-contents .w50-item{
  display: flex;
  flex-direction: column;
  width: 100%;
  color: #fff;
  margin-bottom: 10%;
}
.home .main-container .section-contents .w50-item .w50-item-photo{
  max-width: 95%;
  padding: 8px;
  box-sizing: border-box;
  box-shadow: 0px 0px 8px #666;
  background: #fff;
  margin: 0 auto;
}
.home .main-container .section-contents .w50-item .w50-item-txt{
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN","Meiryo", sans-serif;
  font-weight: 400;
  font-size: 1.2rem;
  line-height: 2.4rem;
  margin-top: 0;
}
.home .main-container .section-contents .w100-item{
  width: 100%;
  text-align: left;
  padding: 3%;
}
.home .main-container .section-contents .w100-item .w100-item-txt{
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN","Meiryo", sans-serif;
  font-weight: 400;
  font-size: 1.2rem;
  line-height: 2.4rem;
  margin-top: 0;
  color: #fff;
}
.home .main-container .section-contents .w100-item .w100-item-txt_brown{
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.8rem;
  margin-top: 0;
  color: #391E03;
  width: 95%;
}
.home .main-container .section-contents .w100-item .w100-item-txt_brown li{
  margin-bottom: 1.4rem;
}

.home .main-container .section-contents-rr{
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  margin: 2% auto;
}
.home .main-container .section-contents-rr .w50-item{
  display: flex;
  flex-direction: column;
  width: 100%;
  color: #fff;
  margin-bottom: 10%;
}
.home .main-container .section-contents-rr .w50-item .w50-item-photo{
  max-width: 95%;
  padding: 8px;
  box-sizing: border-box;
  box-shadow: 0px 0px 8px #666;
  background: #fff;
  margin: 0 auto 10% auto;
}
.home .main-container .section-contents-rr .w50-item .w50-item-txt{
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN","Meiryo", sans-serif;
  font-weight: 400;
  font-size: 1.2rem;
  line-height: 2.4rem;
  margin-top: 0;
  margin-bottom: 5%;
}
.home .main-container .section-contents-rr .w50-item .w50-item-txt .graf-title{
  background-color: #fff;
  padding: 0.3% 4%;
  color: #000;
  font-size: 1rem;
  margin-right: 2rem;
  margin-bottom: 1rem;
  display: inline-block;
}
.home .main-container .section-contents-rr .w50-item .w50-item-txt .pc-indent{
  display: none;
}
.home .main-container .section-contents-rr .w100-item{
  width: 100%;
  text-align: left;
  padding: 3%;
}
.home .main-container .section-contents-rr .w100-item .w100-item-txt{
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  font-weight: 400;
  font-size: 1.2rem;
  line-height: 2.4rem;
  margin-top: 0;
  color: #fff;
}

@media (min-width: 768px) {
.home .main-container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 60px 20px 20px 20px;
  }
  .home .main-container .section-contents{
    flex-direction: row;
    gap:40px;
    justify-content: center;
  }
  .home .main-container .section-contents .w50-item{
    width: 45%;
    margin-bottom: 0%;
  }
  .home .main-container .section-contents .w50-item .w50-item-txt{
    font-size: 1rem;
    line-height: 1.7rem;
  }
  .home .main-container .section-contents-rr .w50-item .w50-item-txt .pc-indent{
    display: inline;
    width: 50px;
  }
  .home .main-container .section-contents .w50-item .w50-item-txt{
    font-size: 0.9rem;
    line-height: 1.7rem;
  }
  .home .main-container .section-contents .w100-item .w100-item-txt{
    font-size: 1rem;
    line-height: 2rem;
  }
  .home .main-container .section-contents .w100-item .w100-item-txt_brown{
    font-size: 1rem;
    line-height: 2rem;
  }

  .home .main-container .section-contents-rr{
    flex-direction: row-reverse;
    gap:40px;
    justify-content: center;
  }
  .home .main-container .section-contents-rr .w50-item{
    width: 45%;
    margin-bottom: 0%;
  }
  .home .main-container .section-contents-rr .w50-item .w50-item-txt .graf-title{
    padding: 1% 4%;
    margin-bottom: 0rem;
    display: inline;
  }
  .home .main-container .section-contents-rr .w50-item .w50-item-photo{
    margin-bottom: 0;
  }
  .home .main-container .section-contents-rr .w50-item .w50-item-txt{
    font-size: 0.9rem;
    line-height: 1.7rem;
  }
  .home .main-container .section-contents-rr .w100-item .w100-item-txt{
    font-size: 1rem;
    line-height: 2rem;
  }

}



/* section - intro-area */
.intro-area{
  max-width: 100%;
  margin: 2% auto 10% auto;
}
.intro-area .intro-title{
  margin: 0 auto;
  width: 100%;
  margin-bottom: 10%;
}
.intro-area .intro-title img{
  width: 100%;
}
@media (min-width: 768px) {
  .intro-area{
    max-width: 1040px;
    margin: 2% auto 10% auto;
  }
  .intro-area .intro-title{
    margin: 0 auto;
    width: 80%;
    margin-bottom: 6%;
  }
  }

/* section - overview-area */
.overview-area{
  max-width: 1040px;
  margin: 10% auto;
}
.overview-area .overview-title{
  margin: 0 auto;
  width: 80%;
  margin-bottom: 10%;
}
.overview-area .overview-title img{
  width: 100%;
}
@media (min-width: 768px) {
  .overview-area{
    max-width: 1040px;
    margin: 2% auto 10% auto;
  }
  .overview-area .overview-title{
    margin: 0 auto;
    width: 40%;
    margin-bottom: 6%;
  }
  }

/* section - about-area */
.about-area{
  max-width: 1040px;
  margin: 10% auto;
}
.about-area .about-title{
  margin: 0 auto;
  width: 80%;
  margin-bottom: 10%;
}
.about-area .about-title img{
  width: 100%;
}
@media (min-width: 768px) {
  .about-area{
    max-width: 1040px;
    margin: 2% auto 10% auto;
  }
  .about-area .about-title{
    margin: 0 auto;
    width: 40%;
    margin-bottom: 6%;
  }
  }

  /* section - background-area */
.background-area{
  max-width: 1040px;
  margin: 10% auto;
}
.background-area .background-title{
  margin: 0 auto;
  width: 60%;
  margin-bottom: 10%;
}
.background-area .background-title img{
  width: 100%;
}
@media (min-width: 768px) {
  .background-area{
    max-width: 1040px;
    margin: 2% auto 10% auto;
  }
  .background-area .background-title{
    margin: 0 auto;
    width: 30%;
    margin-bottom: 4%;
  }
  }
    /* section - feature-area */
    .feature-area{
      max-width: 100%;
      margin: 10% auto;
      background: url(../images/features_bg_sp.png);
      background-position: top;
      background-size: cover;
      padding: 18% 4%;
    }
    .feature-area .feature-title{
      margin: 5% auto 0 auto;
      width: 85%;
      margin-bottom: 5%;
    }
    .feature-area .feature-title img{
      width: 100%;
    }
    @media (min-width: 768px) {
      .feature-area{
        max-width: 1040px;
        background: url(../images/features_bg.png);
        margin: 2% auto 10% auto;
        padding: 1% 7%;
      }
      .feature-area .feature-title{
        margin: 10% auto 0 auto;
        width: 60%;
        margin-bottom: 2%;
      }
      .home .main-container .section-contents .w100-item .w100-item-txt_brown{
        line-height: 1.4rem;
        width: 100%;
      }
      .home .main-container .section-contents .w100-item .w100-item-txt_brown li{
        margin-bottom: 1.6rem;
      }
      }


    /* section - ecology-area */
.ecology-area{
  max-width: 1040px;
  margin: 10% auto;
}
.ecology-area .ecology-title{
  margin: 0 auto;
  width: 90%;
  margin-bottom: 10%;
}
.ecology-area .ecology-title img{
  width: 100%;
}
@media (min-width: 768px) {
  .ecology-area{
    max-width: 1040px;
    margin: 2% auto 10% auto;
  }
  .ecology-area .ecology-title{
    margin: 8% auto!important;
    width: 45%;
    margin-bottom: 2%;
  }
  }

    /* section - academic-area */
.academic-area{
  max-width: 1040px;
  margin: 10% auto;
}
.academic-area .academic-title{
  margin: 0 auto;
  width: 50%;
  margin-bottom: 10%;
}
.academic-area .academic-title img{
  width: 100%;
}
.academic-area .w100-item .academic-list{
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  font-weight: 400;
  font-size: 1rem;
  line-height: 2.4rem;
  color: #fff;
  margin-bottom: 5%;
  margin-left: -5%;
  width: 100%;
}
.academic-area .w100-item .academic-title02{
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  font-weight: 400;
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 1rem;
  margin-left: 3%;
}
.academic-area .w100-item .w100-item-txt{
  font-size: 70%;
  line-height: 70%;
  margin:0 3% 1rem 3%;
}
.fs-70{
  font-size: 70%;
  line-height: 70%;
}
@media (min-width: 768px) {
  .academic-area{
    max-width: 1040px;
    margin: 2% auto 10% auto;
  }
  .academic-area .academic-title{
    margin: 0 auto;
    width: 25%;
    margin-bottom: 1%;
  }
  .academic-area .w100-item .academic-list{
    margin-left: 0%;
  }
  }