@media only screen and (max-width: 768px) {
  .pc {
    display: none !important;
  }
  .sp {
    display: block !important;
  }
  .sp-txc {
    text-align: center;
  }
  .flex-wrap-sp {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .section {
    padding-left: 20px;
    padding-right: 20px;
  }
  .section-ttl {
    padding: 15px;
    font-size: 24px;
    font-weight: bold;
  }
  .header-area {
    height: 50px;
    padding: 20px 20px 65px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
  }
  .header-area .top-header {
    width: calc(100% - 50px);
    height: 50px;
  }
  .header-area .top-header .header-content .logo a,
  footer .logo {
    min-width: 225px;
    min-height: 50px;
  }
  .header-area .anatomy-main-menu {
    width: 50px;
    height: 50px;
    margin-top: 50px;
    -ms-flex-item-align: center;
    -ms-grid-row-align: center;
    align-self: center;
    border-radius: 5px;
  }
  .header-area .anatomy-main-menu.fixed {
    position: static;
  }
  .header-area .anatomy-main-menu .navbar {
    height: 50px;
  }
  .header-area .anatomy-main-menu .navbar .nav {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    padding: 10px 0;
    background: #61ba6d;
    background: -webkit-linear-gradient(to right, #61ba6d, #83c331);
    background: linear-gradient(to right, #61ba6d, #83c331);
    transition: none;
  }
  .header-area .anatomy-main-menu .navbar .nav ul {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
  }
  .header-area .anatomy-main-menu .navbar .nav ul li.sp {
    display: -webkit-box !important;
    display: -ms-flexbox !important;
    display: flex !important;
  }
  .header-area .anatomy-main-menu .navbar .nav ul li a {
    width: 100%;
    padding: 10px;
  }
  .header-area .anatomy-main-menu .navbar .nav ul li a.tri-icon::before {
    display: none;
  }
  .header-area .anatomy-main-menu .dropdown {
    display: none;
  }
  .navbar-toggler {
    border: none;
    background-color: transparent;
    cursor: pointer;
    display: block;
    padding: 10px;
  }
  .navbar-toggler .navbarToggler {
    display: inline-block;
    cursor: pointer;
  }
  .navbar-toggler .navbarToggler span {
    position: relative;
    background-color: #fff;
    border-radius: 3px;
    display: block;
    height: 3px;
    margin-top: 5px;
    padding: 0;
    -webkit-transition-duration: 0.3s;
    transition-duration: 0.3s;
    width: 30px;
    cursor: pointer;
  }
  .navbar-toggler .navbarToggler.active span:nth-of-type(1) {
    -webkit-transform: rotate3d(0, 0, 1, 45deg);
    transform: rotate3d(0, 0, 1, 45deg);
    top: 8px;
  }
  .navbar-toggler .navbarToggler.active span:nth-of-type(2) {
    opacity: 0;
  }
  .navbar-toggler .navbarToggler.active span:nth-of-type(3) {
    -webkit-transform: rotate3d(0, 0, 1, -45deg);
    transform: rotate3d(0, 0, 1, -45deg);
    top: -8px;
  }
  .top-hero-slides {
    height: 300px;
    background: url("../images/top_hero_sp-compressor.jpg") no-repeat center
      center / cover;
  }
  .breadcrumbs {
    padding-left: 20px;
    padding-right: 20px;
  }
  .news-boxes {
    width: 90%;
  }
  .news-box {
    margin-bottom: 20px;
  }
  .news-date,
  .news-ttl {
    width: 100%;
    padding: 0px;
  }
  .about-section {
    padding-left: 0px;
    padding-right: 0px;
  }
  .research-section .section-ttl {
    padding-bottom: 30px;
  }
  .research-section .columns {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .research-section .column {
    width: 90%;
    margin-bottom: 50px;
  }
  .research-section .column:last-child {
    margin-bottom: 0;
  }
  .research-section .column .column-image {
    width: 100%;
    margin-bottom: 1em;
  }
  .research-section .column .column-p {
    width: 100%;
    font-size: 15px;
  }
  .research-section .column-ttl {
    margin-bottom: 30px;
    font-size: 20px;
  }
  .research-section .other-research-columns {
    padding-top: 40px;
  }
  .research-section .other-research-columns .column {
    width: 90%;
    margin-right: auto;
    margin-left: auto;
    margin-bottom: 40px;
  }
  .research-section .other-research-columns img.column,
  .other-research-columns .other-research-list {
    width: 100%;
  }
  .other-research-columns .section-ttl {
    text-align: center;
    margin-bottom: 1em;
  }
  .other-research-columns .other-research-list {
    margin-bottom: 20px;
  }
  .other-research-columns .other-research-list li {
    list-style-type: none;
  }
  .member-section .section-ttl {
    padding-top: 40px;
    padding-bottom: 40px;
  }
  .member-section .members {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .member {
    width: 90%;
    padding: 20px 5% 0;
  }
  .member:first-child {
    padding-top: 90px;
  }
  .member:last-child {
    padding-bottom: 20px;
  }
  .archivement-section .section-ttl {
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .about-section .columns {
    margin: 0;
  }
  .timeline > li,
  .lower-achievement-section .timeline > li {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .timeline::before,
  .timeline > li::before,
  .timeline .tl-content::before {
    display: none;
  }
  .timeline .tl-year,
  .timeline .tl-content,
  .lower-achievement-section .timeline .tl-year,
  .lower-achievement-section .timeline .tl-content {
    width: 100%;
  }
  .timeline .tl-year {
    margin-bottom: 10px;
  }
  .course-section .columns {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .course-section .column {
    width: 100%;
  }
  .lower-page .research-section .column {
    width: 100%;
    padding-inline: 0;
  }
  .lower-page .research-section .research-archive .column {
    padding-right: 20px;
  }
  .single-page .single-research-section .column {
    margin-bottom: 20px;
  }
  .single-page .section {
    padding-right: 0;
    padding-left: 0;
  }
  .single-page .section .container {
    padding-right: 20px;
    padding-left: 20px;
  }
  .research-list a {
    width: 100%;
  }
  .single-page .ol-normal {
    padding-left: 20px;
  }
  .lower-page .hero-slides {
    height: 100px;
  }
  .lower-page .hero-slides.member-hero-slides .bg-img {
    background-position: top center;
  }
  .lower-page .member-section .flex {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
  }
  .lower-page .member-section .columns .column {
    width: 100%;
  }
  .lower-page .member-section .pdr20 {
    padding-right: 0;
  }
  .lower-page .member-section .column img {
    margin: 0 auto 20px;
  }
  .lower-page .member-section dt {
    margin-bottom: 10px;
  }
  .lower-page .member-section dd::before {
    display: none;
  }
  .material-section .section-sub-ttl {
    font-size: 14px;
  }
  .material-section .columns {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .material-section .column,
  .material-list li,
  .material-section .btn-columns .column,
  .material-section .btn {
    width: 100%;
  }
  .material-section .btn {
    margin-bottom: 0;
  }
  #pagetop {
    bottom: 15px;
    right: 15px;
  }
  footer > .container {
    padding: 0 0 20px;
  }
  footer .columns {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  footer .column {
    width: 100%;
    padding: 20px 20px 0;
  }
  footer .flex-lg {
    flex: auto;
  }
  footer .flex-m {
    flex: auto;
  }
  footer .column-menu-ttl {
    text-align: left;
  }
  footer .footer-link-list li {
    text-align: left;
  }
}

@media only screen and (max-width: 414px) {
  footer .column-menu-ttl {
    text-align: center;
  }
  footer .footer-link-list li {
    text-align: center;
  }
}