@charset "UTF-8";

.open-box {
  box-sizing: border-box;
    float: none;
    width: auto;
    opacity: 1 !important;
    border: 1px solid #ccc;
    margin: 20px 0 25px 0;
}

.open-box > div {
  position: relative;
  padding: 15px 0 30px 0;
}

.open-box > div::before {
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 10px 12px 10px;
  border-color: transparent transparent #ffffff transparent;
  opacity: 0.8;
  position: absolute;
  bottom: 100%;
}

.open-box > div#open-contents::before {
  left: 68px;
}

  .open-box > div.open-nav {
    background-color: #eee;
    color: #222;
    padding: 0;
  }
  .open-box > div.open-nav button {
    box-sizing: border-box;
    display: block;
    width: 100%;
    padding: 12px 40px 12px 10px;
    text-align: left;
    position: relative;
  }
  .open-box > div.open-nav button _:-ms-fullscreen, :root .open-box > div.open-nav button {
    font-family: -apple-system, BlinkMacSystemFont, "ヒラギノ角ゴ ProN", "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ Pro", "Hiragino Kaku Gothic Pro", "メイリオ", "Meiryo", "ＭＳ Ｐゴシック", sans-serif;
  }
  .open-box > div.open-nav button::after {
    content: "";
    display: block;
    position: absolute;
    top: 50%;
    right: 22px;
    width: 8px;
    height: 8px;
    border-bottom: solid 3px #E73656;
    border-right: solid 3px #E73656;
    -webkit-transform: translateY(-40%) rotate(225deg);
            transform: translateY(-40%) rotate(225deg);
    transition: -webkit-transform 0.4s ease;
    transition: transform 0.4s ease;
    transition: transform 0.4s ease, -webkit-transform 0.4s ease;
  }
  .open-box > div.open-nav button.active::after {
    -webkit-transform: translateY(-60%) rotate(45deg);
            transform: translateY(-60%) rotate(45deg);
  }
  .open-box > div::before {
    display: none;
  }
  .open-box > div#open-contents {
      padding: 15px 15px;
    border-top: 1px solid #ccc;
/*    display: none;  ←初期値は開いた状態にするため無効化*/
  }

.bikou {
    margin-left: 2em;
    text-indent: -2.5em;
}

.anchor-list {
  padding-left: 15px;
  position: relative;
}
.anchor-list a {
    text-decoration: none;
}
.anchor-list a:hover {
    text-decoration: underline;
}
.anchor-list::before {
  content: "";
  display: block;
  width: 5px;
  height: 5px;
  position: absolute;
  left: 0px;
  top: 8px;
  border-top: solid 2px #333;
  border-right: solid 2px #333;
  -webkit-transform: rotate(45deg);
          transform: rotate(45deg);
}

ul.list li {
    list-style: disc;
    margin: 0 0 5px 20px;
}

.small {
    font-size: 90%;
}

.chuui {
    background-color: #eee;
    padding: 20px 20px;
    margin: 35px 0 0 0;
}
.chuui img {
    vertical-align: bottom;
    padding: 0 5px 0 0;
}
.chuui .title {
    font-weight: bold;
    margin: 0 0 10px 0;
}

.mgb-10 {
    margin-bottom: 10px;
}
.mgb-20 {
    margin-bottom: 20px;
}


@media only screen and (max-width: 767px) {
.open-btn a {
  padding: 10px;
}
.open-btn a::after {
  right: 10px;
}
.chuui {
    padding: 15px;
}
  .open-box > div.open-nav button {
    padding: 12px 35px 12px 0;
      text-indent: -2.5em;
      margin-left: 2.5em;
      width: 90%;
  }
  .open-box > div#open-contents {
      padding: 15px 10px;
  }
}