@media only screen and (max-width:900px) {
  .-sp {
    display: block !important;
  }

  .-pc {
    display: none;
  }

  .topics_inner {
    width: 100%;
    max-width: inherit;
    margin: 0 auto;
    padding: 50px 0 0;
  }

  .topics_contents_head {
    display: block;
    height: auto;
    margin-bottom: 30px;
  }

  .topics_contents_date_wrapper {
    width: 50%;
    margin-bottom: 0;
    position: absolute;
    top: 19.4%;
    left: 3%;
    z-index: 4;
  }

  .topics_contents_date_y {
    font-size: 14px;
  }

  .topics_contents_date_dm {
    margin-left: 6px;
    font-size: 23px;
    display: inline-block;
  }

  .topics_contents_category {
    display: block;
    margin-top: 15px;
    margin-left: 40px;
  }

  .topics_contents_heading {
    width: 92%;
    margin: 0 auto;
    padding: 30px 0;
    border-bottom: 1px solid #19274F;
  }

  .topics_contents_mainvisual {
    position: relative;
    height: auto;
  }

  .topics_contents_mainvisual_imagewrap {
    width: 100%;
    height: auto;
    padding-top: 46%;
    margin-left: 0;
    padding-left: 11.2%;
  }

  .topics_contents_mainvisual::after {
    background: url(../img/share/bg-main_sp%402x.png) no-repeat top left;
    background-size: contain;
    height: 100%;
  }

  .topics_contents_title {
    font-size: 24px;
  }

  .topics_contents_subtitle {
    font-size: 17px;
  }

  .topics_contents_body {
    width: 92%;
    margin: 0 auto;
  }

  .topics_contents_lead {
    font-size: 16px;
    margin-bottom: 40px;
  }

  .topics_block_wrapper {
    margin-top: 30px;
    margin-bottom: 30px;
  }

  .topics_block_wrapper.-border {
    padding: 30px 20px;
  }

  .topics_column {
    display: block;
    margin-top: 30px;
    margin-bottom: 30px;
  }

  .topics_column_item {
    width: 100%;
    max-width: inherit;
  }

  .topics_column .topics_column_item:last-child {
    margin-top: 30px;
  }

  .topics_column.-reverse .topics_column_item:last-child {
    padding-right: 0;
  }

  .topics_column.-smallphoto .topics_column_item:first-child {
    margin: 0 auto 30px;
    width: 69.5%;
    height: auto;
  }

  .topics_column.-smallphoto .topics_column_item:last-child {
    width: 100%;
    padding-left: 0;
  }

  .topics_column.-reverse.-smallphoto .topics_column_item:last-child {
    padding-right: 0;
  }

  .topics_column.-smallphoto .topics_column_item h4,
  .topics_column.-smallphoto .topics_column_item p {
    font-size: 14px;
  }

  .topics_column.-smallphoto .topics_column_item h4 {
    margin-bottom: 1em;
  }

  .topics_column.-smallphoto .topics_column_item h3 + h4 {
    margin-top: -15px !important;
  }

  .topics_column.-smallphoto .topics_image_wrapper {
    padding-top: 100%;
  }

  .topics_column.-largephoto .topics_column_item {
    width: 100%;
    margin: 30px auto;
  }

  /*	本文エリア
  ----------------------------------------------- */
  .topics_detail h2 {
    font-size: 22px;
    margin-top: 50px;
    margin-bottom: 30px;
    padding-bottom: 8px;
  }

  .topics_detail h3 {
    font-size: 18px;
    margin-top: 30px;
    margin-bottom: 20px;
  }

  .topics_detail h4 {
    margin-bottom: 20px;
  }

  .topics_detail h3 + h4 {
    margin-top: -10px !important;
  }

  .topics_detail h4,
  .topics_detail p {
    font-size: 16px;
  }

  .topics_detail p {
    margin-top: 1em;
    margin-bottom: 1em;
    font-size: 14px;
  }

  .topics_detail hr {
    margin-top: 50px;
    margin-bottom: 50px;
  }

  .topics_detail h2 br {
    display: none;
  }

  /*	関連記事
  ----------------------------------------------- */
  .related_topics {
    margin-top: 50px;
  }

  .related_topics_inner {
    padding: 50px 15px;
  }

  .related_topics_list {
    margin-bottom: 30px;
    display: block;
  }

  .related_topics_item {
    width: 100%;
    max-width: inherit;
    padding: 30px 15px 25px;
  }

  .related_topics_item:not(:first-child) {
    margin-top: 10px;
  }

  .related_topics_anchor[href] {
    display: block;
  }

  .related_topics_image_wrapper {
    width: 60.8%;
    max-width: inherit;
    height: inherit;
    margin: 0 auto 20px;
    padding-top: 36.6%;
  }

  .related_topics_image {
    height: 100%;
  }

  .related_topics_title {
    width: 100%;
    max-width: inherit;
    font-size: 16px;
    line-height: calc(24 / 16);
  }

  .related_topics_title br {
    display: none;
  }

  .topics_back_anchor[href] {
    width: 215px;
    height: 40px;
    font-size: 15px;
  }

  .topics_interlocutor_name {
    font-size: 13px;
  }

  .topics_interlocutor_status {
    font-size: 11px;
    line-height: calc(16.5 / 11);
  }
}