article {
  max-width: 900px;
  padding: 20px 0;
}
#kv {
  max-width: 80%;
  margin-left: auto;
  margin-right: auto;
}
#yodogawa {
  padding-left: 1em;
  padding-right: 1em;
}
#talk_body .pic {
  max-width: 800px;
}
.title, .title_text, .photo_index h4 {
  font-family: "Yu Mincho Pr6N M", serif;
}
/* 目次 用 */
#index_nav ul {
  display: none;
}
#index_nav, .talk_nav_bottom {
  margin-bottom: 0;
}
.photo_index {
  padding: 2em;
  margin-bottom: 3em;
  background-color: #cccccc;
}
.photo_index h3 {
  text-align: center;
  font-weight: bold;
  font-size: 1.25rem;
  padding-top: 1em;
  padding-bottom: 2em;
  margin-bottom: 1.75em;
  border-bottom: 1px solid black;
}
.photo_index ul {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  column-gap: 1.75em;
  row-gap: 1.2em;
}
.photo_index h4 {
  padding-top: 5px;
  line-height: 1.7em;

}
.photo_index a {
  color: black;
}
@media (max-width: 640px) {
  #kv {
    max-width: 90%;
  }
  .photo_index {
    padding: 1.5em;
    margin-bottom: 2em;
  }
  .photo_index h3 {
    padding-bottom: 2em;
    margin-bottom: 1.5em;
  }
  .photo_index ul {
    column-gap: 1.5em;
  }
  .photo_index ul {
    grid-template-columns: 1fr 1fr 1fr;
    column-gap: 1em;
    row-gap: 1em;
  }
  .photo_index h4 {
    padding-top: 1px;
  }
}