body {
  overflow: auto;
}
body::after {
  content: "";
  width: 100vw;
  height: 100vh;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
  position: fixed;
  background-color: rgba(0, 0, 0, 0);
  top: 0;
  left: 0;
  z-index: 101;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  pointer-events: none;
}
body.fixed {
  width: 100%;
  position: fixed;
}
body.fixed::after {
  background-color: rgba(0, 0, 0, 0.7);
  -webkit-user-select: auto;
     -moz-user-select: auto;
      -ms-user-select: auto;
          user-select: auto;
  pointer-events: auto;
}

@media screen and (max-width: 768px) {
  .head-nav-inner {
    min-height: 100vh;
    min-height: 100svh;
    width: 85%;
    position: fixed;
    top: 0;
    left: -100%;
    z-index: 102;
    -webkit-transition: left 0.5s;
    transition: left 0.5s;
    overflow-x: hidden;
  }
  .head-nav-inner.on {
    left: 0%;
  }
  .head-nav-inner.on #contents_left #nav__open.hm_btn {
    left: calc(85% + 10px);
  }
  .head-nav-inner.on #contents_left #nav__open.hm_btn::before {
    -webkit-box-shadow: transparent 0 0 0;
    box-shadow: transparent 0 0 0;
    -webkit-transform: rotate(45deg) translate3d(6px, 11px, 0);
    transform: rotate(45deg) translate3d(6px, 8px, 0);
  }
  .head-nav-inner.on #contents_left #nav__open.hm_btn::after {
    -webkit-transform: rotate(-45deg) translate3d(6px, -11px, 0);
    transform: rotate(-45deg) translate3d(6px, -8px, 0);
  }
  .head-nav-inner #contents_left {
    width: 100%;
    height: 100%;
    margin: 0;
  }
  .head-nav-inner #contents_left #nav__open.hm_btn {
    position: fixed;
    top: 10px;
    left: 10px;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: block;
    z-index: 101;
    -webkit-transition: all 0.5s;
    transition: all 0.5s;
  }
  .head-nav-inner #contents_left #nav__open.hm_btn .siro {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.8);
    position: absolute;
    top: -10px;
    left: -10px;
  }
  .head-nav-inner #contents_left #nav__open.hm_btn::before, .head-nav-inner #contents_left #nav__open.hm_btn::after {
    content: "";
    width: 100%;
    height: 4px;
    background: #000;
    display: block;
    position: absolute;
    -webkit-transition: -webkit-box-shadow 0.2s linear, -webkit-transform 0.2s 0.2s;
    transition: -webkit-box-shadow 0.2s linear, -webkit-transform 0.2s 0.2s;
    transition: box-shadow 0.2s linear, transform 0.2s 0.2s;
    transition: box-shadow 0.2s linear, transform 0.2s 0.2s, -webkit-box-shadow 0.2s linear, -webkit-transform 0.2s 0.2s;
    z-index: 99;
  }
  .head-nav-inner #contents_left #nav__open.hm_btn::before {
    -webkit-box-shadow: #000 0 10px 0;
    box-shadow: #000 0 10px 0;
  }
  .head-nav-inner #contents_left #nav__open.hm_btn::after {
    bottom: 0;
  }
  .head-nav-inner #contents_left #menus {
    height: 100%;
    width: 100%;
    background: #fff;
    overflow-y: scroll;
  }
}