@media screen and (max-width: 767.999px) {
  html {
    font-size: 10px;
  }
  body {
    position: relative;
  }
  body.menu_open {
    overflow: hidden;
    height: 100%;
  }
  body.menu_open #overlay {
    display: block;
    z-index: 10;
    background: #FFFFFF;
    position: absolute;
    inset: 0;
  }
  .pc {
    display: none;
  }
  header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 15;
  }
  header #header_wrapper {
    display: flex;
    justify-content: space-between;
    padding: 8px 20px 25px 28px;
  }
  header #header_wrapper #header_logo {
    padding-top: 18px;
  }
  header.right h1#header_logo img {
    display: none;
  }
  header #header_menu_button {
    width: 45px;
    height: 45px;
    position: relative;
    padding: 0;
    display: block;
    border: none;
    color: #FFFFFF;
    background: transparent;
    cursor: pointer;
  }
  header #header_menu_button .line {
    display: block;
    height: 2px;
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    background-color: var(--main-text-color);
    transition: 0.4s;
  }
  header #header_menu_button .line::before, header #header_menu_button .line::after {
    content: "";
    display: block;
    height: 100%;
    position: absolute;
    width: 100%;
    background-color: var(--main-text-color);
    transition: inherit;
  }
  header #header_menu_button .line::before {
    top: -9px;
  }
  header #header_menu_button .line:after {
    top: 9px;
  }
  header #header_menu_button[aria-expanded="true"] span {
    background-color: transparent;
  }
  header #header_menu_button[aria-expanded="true"] span::before {
    top: 0;
    transform: rotate(45deg);
  }
  header #header_menu_button[aria-expanded="true"] span::after {
    top: 0;
    transform: rotate(-45deg);
  }
  header #header_navi_wrapper {
    display: none;
  }
  header.header_open #header_navi_wrapper {
    display: block;
    height: calc(100vh - 80px);
    overflow-y: scroll;
    padding: 0 28px;
  }
  header.header_open #header_navi_wrapper #header_navi {
    padding-bottom: 60px;
  }
  header.header_open #header_navi_wrapper #header_navi > ul.nav_list {
    padding-top: 20px;
  }
  header.header_open #header_navi_wrapper #header_navi > ul.nav_list > li {
    margin-top: 25px;
  }
  header.header_open #header_navi_wrapper #header_navi > ul.nav_list > li:nth-of-type(1) {
    margin-top: 0;
  }
  header.header_open #header_navi_wrapper #header_navi > ul.nav_list > li a {
    position: relative;
    font-size: 2.2rem;
    font-weight: 800;
  }
  header.header_open #header_navi_wrapper #header_navi > ul.nav_list > li a::before {
    display: block;
    content: attr(data-en);
    font-family: "Poppins", sans-serif;
    color: #8c8c8c;
    text-transform: uppercase;
    font-size: 1.3rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    margin-bottom: -2px;
  }
  header.header_open #header_navi_wrapper #header_navi > ul.sns_link {
    display: flex;
    margin-top: 55px;
    gap: 0 25px;
  }
  footer {
    padding: 50px 0 17px;
  }
  footer #footer_logo {
    text-align: left;
    padding: 0 25px;
  }
  footer #footer_logo img {
    width: 210px;
  }
  footer #footer_company {
    padding: 0 25px;
    margin-top: 20px;
  }
  footer #footer_company > dl {
    margin-bottom: 10px;
  }
  footer #footer_company > dl dt {
    font-size: 1.4rem;
    font-weight: 700;
    padding-top: 12px;
    line-height: 1.57;
  }
  footer #footer_company > dl dd {
    flex-grow: 1;
    border-bottom: 1px solid #dddcda;
    font-size: 1.2rem;
    font-weight: 600;
    padding: 3px 0 17px;
    line-height: 2;
  }
  footer #footer_sns_area {
    margin-top: 45px;
    padding: 0 25px;
  }
  footer #footer_sns_area #footer_sns_link {
    display: flex;
    justify-content: center;
    gap: 0 25px;
  }
  footer #footer_sns_area #footer_sns_link img {
    width: 25px;
    height: 25px;
  }
  footer #footer_copyright {
    margin-top: 45px;
    text-align: center;
    font-size: 1.2rem;
  }
}