@media screen and (min-width: 640px) {
 /*———————————
基本設定
———————————*/
body {
  width: 100%;
  font-family: "游明朝","YuMincho","Hiragino Mincho ProN","Hiragino Mincho Pro","ＭＳ 明朝",serif;
}

main {
max-width: 2000px;
width: 100%;
margin: 0 auto;
position: relative;
}

ul {
  margin: 0;
  padding: 0px;
}


h1 {
  display: flex;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
  height: 25%;
  width: 100%;
  color: #fff;
  letter-spacing: 0.1em;
  font-weight: 400;
  font-size: 35px;
}

h2 {
  font-size: 20px;
  line-height: 34px;
  border: 2px solid #c7000a;
  background-color: #000000;
  color: #fff;
  text-align: center;
  margin: 45px 0;
}

h3 {
  color: #c7000a;
  margin: 17px 0;
}

h4 {
  margin: 10px 0;
}

/* PC用コンテンツのみを表示 */
img.sp_only{
  display: none;
}
img.pc_only{
  display: block;
}

/*———————————
ヘッダー
———————————*/

header {
  background-image: url(../img/header_bg_texture.png);
 }

.nav-bar {
  padding-left: 10%;
  padding-right: 0;
  display: flex;
  height: 430px;
 }

.header_logo {
  width: 20%;
}

.header_logo img {
  height:100%;
  width: 100%;
  max-width: 150px;
  min-width: 120px;
}

.pc_header_container {
  display: flex;
  align-items: flex-end;
  flex-direction: column;
 justify-content: space-between;
}

.eye_catch {
  width: 100%;
  max-width: 863px;
  display: flex;
  align-items: flex-end;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: right;
  height: 80%;
  max-height: 322px; 
  box-sizing: border-box;
}

.pt_history{background-image: url(../img/under_page/history/ttl_eye_catch.jpg);}
.pt_contents{background-image: url(../img/under_page/contents/ttl_eye_catch.jpg);}
.pt_join{background-image: url(../img/under_page/join/ttl_eye_catch.jpg);}
.pt_access{background-image: url(../img/under_page/access/ttl_eye_catch.jpg);}
.pt_committee{background-image: url(../img/under_page/committee/ttl_eye_catch.jpg);}
.pt_sponsorship{background-image: url(../img/under_page/sponsorship/ttl_eye_catch.jpg);}

/*———————————
メニュー
———————————*/

.menu {
   width: 70%;
   padding-bottom: 15px;
   padding-top: 30px;
   padding-right: 100px;
  }
  
 .menu ul {
   display: flex;
   justify-content: flex-end;
   flex-wrap: wrap;
 }


 li.menu_item{
   list-style: none;
   padding:0 10px 0 10px;
   line-height: 13px;
   font-size: 15px;
   border-left: 1px solid #000000;
   margin-bottom: 15px;
 }

 li.menu_item a {
   color: #000000;
   text-decoration: none;
 }
 li.menu_item a:hover {
   color: #000000;
   text-decoration: none;
 }


/*———————————
メインコンテンツ
———————————*/

.main_contents {
  margin: 0 100px 90px 100px;
}

.container_inner {
  margin: 0 25px 0 25px;
	overflow: hidden;
}
.container p {
  font-size: 15px;
  letter-spacing: 0.1em;
  margin-bottom: 42px;
  margin-top: 0;
}


/* カラムデザイン */
.column2 {
  display: flex;
  justify-content: space-between;
	margin: 0 0 40px 0;
}
.column2 img {
  width: 100%;
}
.col {
  width: 50%;
}
.text_and_img img{
  margin-left: 30px;
}

/* 画像ギャラリー部分＿PCは均等配置 */
.gallery ul {
  display: flex;
  flex-wrap: wrap-reverse;
  justify-content: space-between;
}
.gallery ul li {
  list-style: none;
}

.gallery img {
  max-width: 250px;
  width: 100%;
}




/*———————————
フッター
———————————*/

div.footer {
  background-image: url(../img/footer_bg.jpg);
  height: 322px;
  background-size: cover;
  background-position: right;
  color: #fff;
  display: flex;
  justify-content: left;
  align-items: flex-start;
  padding: 0 100px 0 100px;
}

  .footer_logo {
    margin: 33px 45px 45px 25px;
  }

  .footer img {
    width: 100%;
  }
  .footer_contact {
    font-size: 15px;
    margin-top: 59px;
  }

  .footer_contact_ttl {
    font-size: 17px;
    width: 294px;
    padding-bottom: 1em;
    border-bottom: 1px dotted #ededed;
  }

  .footer_contact p {
    line-height: 0.5em;
    letter-spacing: 0.1em;
  }

 .footer_contact_ttl:nth-child(2n) {
    margin-top: 50px;
  }
  .copylight {
    height: 60px;
    text-align: center;
    line-height: 60px;
  }
}