@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@100;300;400;500;700;900&display=swap");
/*main visual height*/
/*page top container padding*/
html {
  font-size: 62.5%;
  /* font-size 16px*62.5%=10px */
  width: 100%; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 1.5rem;
  line-height: 1.9;
  margin: 0;
  padding: 0;
  background-image: url("../img/back.png");
  background-size: cover;
  background-attachment: fixed;
  background-position: center center;
  background-repeat: no-repeat;
  width: 100%; }

footer {
  background-color: #181818;
  color: #ffffff;
  width: 100%; }

h1 {
  color: #181818;
  font-size: 2rem;
  padding: 10px 0 10px 0;
  font-weight: 700;
  position: relative;
  margin-bottom: 1.5rem; }
  h1.icon {
    border-bottom: #d4abe5 4px solid; }
    h1.icon::before {
      display: inline-block;
      content: "";
      background-image: url("data:image/svg+xml,<svg viewBox='0 0 16 16' fill='%23a78bab' xmlns='http://www.w3.org/2000/svg'>\a 	<path fill-rule='evenodd' d='M3.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L9.293 8 3.646 2.354a.5.5 0 0 1 0-.708z' clip-rule='evenodd'/><path fill-rule='evenodd' d='M7.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L13.293 8 7.646 2.354a.5.5 0 0 1 0-.708z' clip-rule='evenodd'/></svg>");
      background-repeat: no-repeat;
      width: 20px;
      height: 20px;
      margin-right: 5px; }
    h1.icon::after {
      content: "";
      display: block;
      line-height: 0;
      overflow: hidden;
      position: absolute;
      left: 0;
      bottom: -4px;
      width: 30%;
      border-bottom: 4px solid #181818; }

h2 {
  color: #181818;
  font-size: 1.6rem;
  padding: 10px 0 10px 0;
  font-weight: 700;
  position: relative; }
  h2.icon {
    border-left: 10px #d4abe5 solid;
    padding-left: 10px; }

.font-small {
  font-size: 1.3rem; }

.navbar {
  min-width: 350px;
  background-color: #181818;
  font-size: 1.4rem; }
  .navbar a {
    color: #ffffff;
    margin-bottom: 5px; }
    .navbar a.navbar-brand {
      margin-right: 30px;
      color: #d4abe5;
      font-size: 1.9rem;
      font-weight: 700;
      line-height: 2.1rem;
      display: inline-block;
      margin: 5px 5px 5px 0; }
      .navbar a.navbar-brand p {
        margin: 0;
        padding: 0; }
    .navbar a.select {
      color: #d4abe5;
      cursor: pointer; }
  .navbar a:not(.navbar-brand):hover {
    border-bottom: 3px solid #d4abe5;
    color: #ffffff; }
  .navbar .navbar-toggler {
    color: #ffffff;
    border: 1px solid #ffffff;
    margin-right: 10px; }
  .navbar .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(255, 255, 255, 0.5)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e"); }
  .navbar ul.navbar-nav {
    border-bottom: #ffffff solid 1px; }
  .navbar .nav-link {
    border-bottom: 3px solid #181818;
    padding: 0.7rem 0; }

.fixed-top {
  z-index: 1050; }

#index .nav-link.index,
#research .nav-link.research,
#publication .nav-link.publication,
#member .nav-link.member,
#access .nav-link.access {
  border-bottom: 3px solid #d4abe5; }

.container_outer {
  display: block;
  position: relative;
  width: 100%;
  padding: 50px 0; }
  .container_outer.scroll-top-area {
    padding: 0; }
  .container_outer.pagetop {
    padding: 75px 0; }
    .en .container_outer.pagetop {
      padding: 112.5px 0; }
  .container_outer.end {
    padding-bottom: 110px; }
    .en .container_outer.end {
      padding-bottom: 110px; }
  .container_outer .container {
    min-width: 350px; }

.container-fluid_outer {
  padding: 50px 0; }

.bg {
  background-color: #E8EEE4; }

main ul, main ol {
  padding: 0;
  margin: 0;
  list-style-position: inside; }
  main ul.list, main ol.list {
    list-style: none; }
    main ul.list li, main ol.list li {
      margin: 0px;
      padding: 20px 10px 10px 0;
      border-bottom: dotted 1px #d4abe5; }
    main ul.list.number, main ol.list.number {
      list-style: decimal;
      list-style-position: inside; }
      main ul.list.number li p:first-child, main ol.list.number li p:first-child {
        display: inline; }
  main ul.icon li, main ol.icon li {
    list-style: none; }
    main ul.icon li::before, main ol.icon li::before {
      display: inline-block;
      content: "";
      background-image: url("data:image/svg+xml,<svg viewBox='0 0 16 16' fill='%23a78bab' xmlns='http://www.w3.org/2000/svg'>\a 	<path fill-rule='evenodd' d='M3.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L9.293 8 3.646 2.354a.5.5 0 0 1 0-.708z' clip-rule='evenodd'/><path fill-rule='evenodd' d='M7.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L13.293 8 7.646 2.354a.5.5 0 0 1 0-.708z' clip-rule='evenodd'/></svg>");
      background-repeat: no-repeat;
      width: 12px;
      height: 12px;
      margin-right: 10px; }
main a {
  color: #181818;
  text-decoration: underline; }
  main a:hover {
    color: #d4abe5; }

/*tab menu--------------------------------------------*/
ul.tab {
  display: flex;
  width: 100%; }
  ul.tab li {
    list-style: none;
    cursor: pointer;
    border-left: 1px solid #d4abe5;
    margin: 0 0 10px 0;
    font-size: 1.3rem;
    padding: 0 15px; }
    ul.tab li:hover, ul.tab li:hover {
      background-color: #d4abe5;
      color: #ffffff; }
    ul.tab li:last-child {
      border-right: 1px solid #d4abe5; }
    ul.tab li.select {
      background: #d4abe5;
      color: #ffffff; }

.tab {
  display: flex;
  width: 100%; }
  .tab div {
    list-style: none;
    cursor: pointer;
    border-left: 1px solid #d4abe5;
    margin: 0 0 10px 0;
    font-size: 1.3rem;
    padding: 0 15px; }
    .tab div:hover, .tab div:hover {
      background-color: #d4abe5;
      color: #ffffff; }
    .tab div:last-child {
      border-right: 1px solid #d4abe5; }
    .tab div.select {
      background: #d4abe5;
      color: #ffffff; }

.tab_content {
  width: 100%;
  margin: 0 0 30px 0;
  clear: left;
  background-color: #ffffff; }
  .tab_content li:last-child {
    margin-bottom: 30px; }
  .tab_content.display_none {
    display: none; }
  .tab_content ol, .tab_content ul {
    margin: 0 20px; }

/*--------------------------------------------*/
.text-box {
  position: relative;
  border: 1px solid #E8EEE4;
  padding: 24px;
  background-color: #ffffff; }

.white-box {
  background-color: #ffffff; }

.btn-original {
  color: #ffffff;
  background-color: #181818;
  border-color: #181818;
  padding: 10px 30px; }
  .btn-original:visited, .btn-original:focus {
    color: #ffffff;
    text-decoration: none; }
  .btn-original:active, .btn-original:target, .btn-original:hover {
    background-color: #d4abe5;
    border-color: #d4abe5;
    color: #ffffff; }

#scroll-top {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 30%;
  height: 64px;
  margin-right: auto;
  margin-left: auto;
  text-align: right;
  z-index: 4;
  transform: translate3d(0, 0, 0); }

.long-url {
  word-break: break-all; }

/*video---------------------------------------*/
.main-visual {
  background-size: cover;
  text-align: center;
  position: relative;
  overflow: hidden;
  height: 100px;
  min-width: 350px;
  background-color: #000; }
  #index .main-visual {
    height: 200px; }

.main-visual img {
  z-index: 3;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto; }

.cover-area {
  z-index: 2;
  overflow-y: auto;
  width: 100%;
  height: 100vh;
  position: absolute;
  top: 0;
  left: 0;
  background-image: linear-gradient(45deg, rgba(0, 0, 0, 0.2) 50%, rgba(0, 0, 0, 0.5) 50%);
  background-size: 3px 3px; }

.main-visual video {
  z-index: 1;
  margin: 0 auto;
  width: 100%; }
  #member .main-visual video {
    margin: -20px auto; }
  #research .main-visual video {
    margin: -100px auto; }
  #publication .main-visual video {
    margin: -30px  auto; }
  #access .main-visual video {
    margin: -150px auto; }

/*responsive---------------------------------------*/
@media (min-width: 768px) {
  .container_outer.pagetop {
    padding: 80px 0; }
    .en .container_outer.pagetop {
      padding: 120px 0; }

  .main-visual {
    height: 150px; }
    #index .main-visual {
      height: 300px; }

  #member .main-visual video {
    margin: -100px auto; }
  #research .main-visual video {
    margin: -200px auto; }
  #publication .main-visual video {
    margin: -300px  auto; }
  #access .main-visual video {
    margin: -150px auto; }

  .navbar a.navbar-brand {
    font-size: 2.4rem;
    margin: 8px 30px 8px 0; }

  .navbar-expand-lg .navbar-nav .nav-link {
    padding-right: 0.3rem;
    padding-left: 0.3rem; }

  h1 {
    font-size: 2.4rem; }

  h2 {
    font-size: 1.8rem; } }
@media (min-width: 992px) {
  .container_outer.pagetop {
    padding: 85px 0; }
    .en .container_outer.pagetop {
      padding: 127.5px 0; }

  .navbar ul.navbar-nav {
    border-bottom: none; }
    .navbar ul.navbar-nav.menu .nav-item {
      padding: 0 10px; }
  .navbar .nav-link {
    padding: 0.5rem 0; }

  .main-visual {
    height: 133.3333333333px; }
    #index .main-visual {
      height: 400px; } }