@media screen and (max-width: 780px) {
  body {
    font-size: 12px;
  }
  .pc {
    display: none !important;
  }
  .sp {
    display: block !important;
  }
  /* layout */
  .sec {
    padding: 40px 0;
  }
  .inr {
    width: 96%;
    padding: 0 2%;
    box-sizing: border-box;
  }
  /* ttl */
  .ttl {
    margin-bottom: 15px;
  }
  .ttl h2 {
    font-size: min(8.8vw, 70px);
  }
  .ttl.page_ttl {
    padding-bottom: 30px;
  }
  /* btn */
  .btn a {
    font-size: min(3.5vw, 14px);
  }
  article.page {
    padding-top: max(20vw, 90px);
  }
  /*-----------------------------------------
  header
  -----------------------------------------*/
  header {
    padding: 4px 0;
  }
  header .inr .logo_sec {
    min-width: 180px;
    width: 50%;
  }
  header .inr .logo_sec h1 {
    font-size: 4cqw;
  }
  header #sp_nav .in_navi ul li {
    border-bottom: 1px solid #000;
    padding: 15px 0 15px 20px;
    font-size: 13px;
    font-weight: 500;
    position: relative;
  }
  header #sp_nav .in_navi ul li a {
    display: block;
  }
  header #sp_nav .in_navi ul li a:hover {
    color: #ea5441;
  }
  header #sp_nav .in_navi ul li::before {
    content: "";
    position: absolute;
    left: 0px;
    top: calc(50% - 4px);
    width: 10px;
    height: 10px;
    mask-image: url("../images/common/allow.svg");
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    background-color: #ea5441;
  }
  header .sp_info_sec {
    margin-top: 30px;
    float: right;
    text-align: right;
  }
  header .sp_info_sec .nav_logo {
    margin: 10px 0 0 auto;
    max-width: 300px;
  }
  header .sp_info_sec p {
    cursor: pointer;
    padding: 5px 20px;
    border-radius: 10px;
    border: 1px solid #000;
    display: inline-block;
    margin-top: 20px;
  }
  /*-----------------------------------------
  footer
  -----------------------------------------*/
  footer {
    margin-top: 80px;
  }
  footer .inr {
    padding: 20px 0;
  }
  footer .inr .page_top {
    right: 0;
    left: 0;
    text-align: center;
  }
  footer .cont {
    flex-flow: column;
  }
  footer .cont .info {
    width: 100%;
  }
  footer .cont .info .logo {
    width: 40%;
    min-width: 250px;
    margin: 0 auto;
  }
  footer .cont .info dl {
    font-size: 90%;
  }
  footer .cont .nav_sec {
    width: 100%;
    margin-top: 30px;
  }
  footer .cont .nav_sec ul {
    justify-content: space-around;
  }
  footer .cont .nav_sec ul li {
    padding-left: 15px;
    margin-bottom: 15px;
    font-size: min(2.5vw, 13px);
    width: 30%;
    box-sizing: border-box;
    text-align: center;
    border-bottom: 3px solid #f1f1f1;
  }
  footer .cont .nav_sec .copyright {
    text-align: center;
  }
}