.humb,
nav.nav,
.sp_header{
  display: none;
}

@media screen and (max-width:980px){
  .pc_header{
    display: none;

  }
  .sp_header{
    display: block;
  }
.sp_logo {
  display: block;
  width: 40%;
  text-align: center;
  max-width: 300px;
  margin: 0 auto;
  padding: 10px 20px;
  }
  .sp_logo img{
    width:100%;
}
  
/*============
nav
=============*/
nav {
  display: block;
  position: fixed;
  top: 0;
  left: -300px;
  bottom: 0;
  width: 300px;
  background: #ffffff;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transition: all .5s;
  z-index: 3;
  opacity: 0;
}
.open nav {
  top:50px;
  left: 0;
  opacity: 1;
  width:100%;
}
nav .inner {
  padding: 25px;
}
nav .inner .index_message a{
  text-align: center;
}
nav .inner ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: block;
  max-width: 480px;
  margin:0 auto;
}
nav .inner ul li {
  position: relative;
  margin: 0;
  border-bottom: 1px solid #333;
}
nav .inner ul li a,
nav .inner ul li dl dt{
  display: block;
  color: #333;
  font-family: var(--english-font);
  font-size: 14px;
  padding: 1em;
  text-decoration: none;
  transition-duration: 0.2s;
}
nav .inner ul li a{
  position:relative;
}
nav .inner ul li a::after{
  content:"";
  position:absolute;
  width:8px;
  height:8px;
  border-right:1px solid #30486A;
  border-bottom:1px solid #30486A;
  top:21px;
  right:20px;
  transform: rotate(-45deg);
  transition: 0.5s all;;
}
nav .inner ul li.open a::after{
  transform: rotate(45deg);
  transition: 0.5s all;;
}

ul.nav li:not(:first-child){
  border-left:none;
}
nav .inner ul li dl dt{
  position:relative
}
nav .inner ul li dl dt::after{
  content: "";
  display: block;
  width: 6px;
  height: 6px;
  position: absolute;
  left:70px;
  top:18px;
  border-top: solid 1px;
  border-right: solid 1px;
  transform: rotate(135deg);
  color: inherit;
  position:absolute;
}
nav .inner ul li dl dt.acc-open::after{
  content:"";
  transition:0.8s all;
  top:22px;
  transform: rotate(-45deg);
}
nav .inner ul li dl dt span{
  font-size:0.8rem;
}
nav .inner ul li dl dd a{
  font-size:12px;
  padding:0 0.5em 15px;
  text-align: left;
}
nav .inner ul li a:hover {
  background: #e4e4e4;
}
.sp_mega-menu {
    position: static;
    transform: none;
    width: 100%;
    box-shadow: none;
    padding: 15px 0;
  }

.sp_mega-menu ul {
    grid-template-columns: 1fr;
    gap: 0;
  }

  nav .inner ul.nav li.sp_has-mega .sp_mega-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height .6s ease;
    padding: 0;
  }

  nav .inner ul.nav li.sp_has-mega.open .sp_mega-menu {
    max-height: 1200px;
    position:static;
  }
  
  nav .inner ul.nav li.sp_has-mega.open .sp_mega-menu ul li a,
  nav .inner ul.nav li.sp_has-mega .sp_mega-menu ul li a{
    font-size:12px;
    font-family: var(--f-f-japanese);
    padding:0.6em 2.5em 0.6em;
  }

  nav .inner ul.nav li.sp_has-mega.open .sp_mega-menu ul li:last-child{
    border-bottom:none;
  }

  nav .inner ul.nav li.sp_has-mega.open .sp_mega-menu ul li a::after{
    width:5px;
    height:5px;
    top:16px;
    transform: rotate(-45deg);
  }
@media screen and (max-width: 767px) {
  nav {
    left: -220px;
    width: 220px;
  }
}
/*============
.toggle_btn
=============*/
.toggle_btn {
  display: block;
  position:fixed;
  top:0;
  right:0;
  width: 50px;
  height: 50px;
  transition: all .5s;
  cursor: pointer;
  z-index: 10;
  background-color: var(--navy);
  border-left:1px solid #fff;
  border-bottom:1px solid #fff;
  box-sizing: border-box;

}
.open .toggle_btn {
  right: 0;
}
.toggle_btn span {
  display: block;
  position: absolute;
  left: 15px;
  width: 20px;
  height: 1px;
  background-color: #fff;
  border-radius: 4px;
  transition: all .5s;
}
.toggle_btn span:nth-child(1) {
  top: 16px;
}
.toggle_btn span:nth-child(2) {
  top: 25px;
}
.toggle_btn span:nth-child(3) {
  bottom: 16px;
}
.open .toggle_btn span {
  background-color: #fff;
}
.open .toggle_btn {
  -webkit-transform: rotate(360deg);
  transform: rotate(360deg);
}
/* 真ん中の線を消す */
.open .toggle_btn span:nth-child(2) {
  opacity: 0;
}

/* 上の線 → 中央へ + 45deg */
.open .toggle_btn span:nth-child(1) {
  top: 25px;
  transform: rotate(45deg);
}

/* 下の線 → 中央へ -45deg */
.open .toggle_btn span:nth-child(3) {
  bottom: auto;
  top: 25px;
  transform: rotate(-45deg);
}
@media screen and (max-width: 767px) {
  .open .toggle_btn {
    right: 0;
  }
}
/*============
#mask
=============*/
#mask {
  display: none;
  transition: all .5s;
}
.open #mask {
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  opacity: .8;
  z-index: 2;
  cursor: pointer;
}
}

/*
@media screen and (max-width: 768px) {
  .menu-icon:checked + label,
  .menu-icon:not(:checked) + label{
    right: 30px;
    top:30px;
  }
  .logo {
    left: 30px;
  }
  .nav{
    right: 15px;
  }
  
  .nav ul li a{
    font-size: 1rem;
  }
}*/