@charset "UTF-8";
/*カラー設定*/
/*フォントカラー*/
/*背景色*/
.archiveYear *,
.archiveYear *::before,
.archiveYear *::after {
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  margin: 0;
}

img {
  max-width: 100%;
}

body {
  margin: 0;
}

#on_cont {
  margin: 3rem auto 0;
  width: 1190px;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}

#on_cont .archiveYear {
  overflow: hidden;
  margin: 0 auto 2rem;
}

#on_cont .archiveYear li {
  float: left;
  color: #000000;
}

#on_cont .archiveYear li a, #on_cont .archiveYear li span {
  font-size: 1.6rem;
  font-weight: bold;
  text-decoration: none;
  background-color: #2f2d33;
  border: 1px solid #2f2d33;
  padding: 20px 29.9px;
  color: #ffffff;
  line-height: 1;
  display: inline-block;
}

#on_cont .archiveYear li a:hover, #on_cont .archiveYear li span:hover {
  border-bottom-color: #ffffff;
  background-color: #ffffff;
  color: #000000;
}

@media screen and (max-width: 640px) {
  #on_cont .archiveYear li a, #on_cont .archiveYear li span {
    display: block;
    text-align: center;
    word-break: break-word;
    font-size: 1.2rem;
    padding: 20px 10px;
  }
}

#on_cont .archiveYear li span {
  border-bottom-color: #ffffff;
  background-color: #ffffff;
  color: #000000;
}

@media screen and (max-width: 640px) {
  #on_cont .archiveYear li {
    margin-bottom: 3.5%;
    margin-right: 3.5%;
    width: 31%;
  }
}

#on_cont .archiveYear li:nth-child(3n) {
  margin-right: 0;
}

#on_cont .archiveYear li + li {
  margin-left: 19px;
}

@media screen and (max-width: 640px) {
  #on_cont .archiveYear li + li {
    margin-left: 0;
  }
}

@media screen and (max-width: 640px) {
  #on_cont .archiveYear {
    margin: 0 auto 1.5rem;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    width: 100%;
  }
}

#on_cont .on_cont_inner {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-wrap: wrap;
      -ms-flex-wrap: wrap;
          flex-wrap: wrap;
}

#on_cont .on_cont_inner section {
  -webkit-flex-basis: 31%;
      -ms-flex-preferred-size: 31%;
          flex-basis: 31%;
  margin-right: 27px;
  margin-bottom: 1rem;
}

#on_cont .on_cont_inner section:last-of-type {
  margin: 0;
}

#on_cont .on_cont_inner section h2 {
  line-height: 1.3;
  margin: 1rem 0;
  font-size: 1.4rem;
}

@media screen and (max-width: 640px) {
  #on_cont .on_cont_inner section {
    -webkit-flex-basis: 100%;
        -ms-flex-preferred-size: 100%;
            flex-basis: 100%;
    margin: 0 0 1.5rem;
  }
}

@media screen and (max-width: 640px) {
  #on_cont {
    width: 100%;
    font-size: 85%;
    margin-bottom: 3em;
    padding: 0 20px;
  }
}

.YT_out {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
}

.YT_out_block {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}