@charset 'UTF-8';
/*  透過
----------------------------------------*/
/*  ボーダー
----------------------------------------*/
.presentation_list {
  margin-bottom: 100px;
  border-bottom: 1px dotted #d1d0d0;
}
.presentation_list_li.thread {
  position: relative;
  padding-left: 30px;
}
.presentation_list_li.thread:before {
  position: absolute;
  top: 20px;
  left: 12px; 
  width: 10px;
  height: 9px;
  content: '';
  border-bottom: 1px solid #373737;
  border-left: 1px solid #373737;
}
.presentation_list_li .link_button {
  padding-left: 0;
  border-top: 1px dotted #d1d0d0;
  border-right: none;
  border-bottom: none; 
  border-left: none;
}
.presentation_list_li .link_button_icon {
  margin: 0;
  padding-left: 10px;
}
.presentation_list_li .link_button_size {
  padding-left: 5px;
  font-size: 1.2rem;
}
.presentation_list_li .link_button:hover {
  text-decoration: underline;
}
.presentation_list_li .link_button .on_demand_icon {
  width: 20px; 
  opacity: 1.0;
}

.nav_past_presentation {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display:         flex;
  margin-bottom: 80px;
  letter-spacing: -0.40em;

  -webkit-flex-flow: wrap;
      -ms-flex-flow: wrap;
          flex-flow: wrap;
  -webkit-box-pack: start;
  -webkit-justify-content: flex-start;
  -ms-flex-pack: start;
          justify-content: flex-start;
}
.nav_past_presentation_li {
  margin: -1px 0 0 -1px; 
  letter-spacing: normal;

  -webkit-flex-basis: 201px;
  -ms-flex-preferred-size: 201px;
          flex-basis: 201px;
}
.nav_past_presentation_li:nth-child(4n+1) {
  clear: left;
  margin-left: 0;
}
.nav_past_presentation_li .link_button {
  z-index: 1; 
  height: 50px;
  min-height: 50px;
  padding: 10px 49px 10px 19px;
}
.nav_past_presentation_li .link_button::after {
  position: absolute;
  top: 50%;
  right: 22px;
  display: block;
  width: 11px;
  height: 11px;
  margin-top: -5.5px; 
  content: '';
  -webkit-transform: rotate(45deg);
      -ms-transform: rotate(45deg);
          transform: rotate(45deg);
  border-top: 1px solid transparent;
  border-right: 1px solid #484848;
  border-bottom: 1px solid #484848;
  border-left: 1px solid transparent;
}
.nav_past_presentation_li .link_button:hover {
  z-index: 2;
}

.content_title_third.past {
  margin-top: -40px;
}