@media screen and (max-width: 767.999px) {
  html {
    font-size: 10px;
  }
  body {
    letter-spacing: 0.08em;
  }
  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 #header_wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 22px 15px 25px;
  }
  header #header_logo {
    width: 180px;
  }
  header #header_menu_button {
    width: 27px;
    height: 40px;
    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: 19px;
    left: 50%;
    transform: translateX(-50%);
    width: 13px;
    background-color: #abd3d0;
    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: #abd3d0;
    transition: inherit;
  }
  header #header_menu_button .line::before {
    top: -7px;
  }
  header #header_menu_button .line:after {
    top: 7px;
  }
  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_navi_wrapper #header_navi {
    padding: 30px 60px;
  }
  header #header_navi_wrapper #header_navi > ul {
    margin-top: 15px;
  }
  header #header_navi_wrapper #header_navi > ul > li {
    text-align: left;
    margin-top: 30px;
  }
  header #header_navi_wrapper #header_navi > ul > li a {
    font-size: 1.5rem;
    font-weight: 600;
  }
  header #header_navi_wrapper #header_navi > ul > li:nth-of-type(1) {
    margin-top: 0;
  }
  header.header_open {
    background: #FFFFFF;
  }
  header.header_open #header_navi_wrapper {
    display: block;
    height: calc(100vh - 110px);
    overflow-y: scroll;
  }
  footer {
    padding-bottom: 47px;
  }
  footer #footer_copyright {
    text-align: center;
    letter-spacing: 0.06em;
    font-weight: 400;
  }
}