@media (max-width: 767px) {
	.header {
		padding-bottom: 44.444%;
	}
}
@media (min-width: 768px) {
	.header {
		padding-bottom: 33.333%;
	}
}

.sect-aniv {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
}

.sect-aniv * {
    box-sizing: border-box;
  }

.sect-aniv__ttl {
    margin-bottom: 20px;
  }

.sect-aniv__ttl img {
      display: block;
    }

.sect-aniv__nav {
    margin-bottom: 20px;
  }

.local-nav {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  margin: 0 -10px -20px;
}

.local-nav__item {
    -webkit-box-flex: 0;
        -ms-flex: 0 0 50%;
            flex: 0 0 50%;
    max-width: 50%;
    padding: 0 10px 20px;
  }

.local-nav__item > * {
      display: block;
      overflow: hidden;
      text-indent: 120%;
      white-space: nowrap;
      height: 0;
      padding-top: 15.81395%;
      background: 0 0 no-repeat;
      background-size: 100%;
      -webkit-transition: opacity .2s;
      transition: opacity .2s;
    }

.local-nav__item a:hover {
        opacity: .8;
      }

.local-nav__item--01 > * {
        background-image: url(../img/10th/btn_01.png);
      }

.local-nav__item--02 > * {
        background-image: url(../img/10th/btn_02.png);
      }

.local-nav__item--03 > * {
        background-image: url(../img/10th/btn_03.png);
      }

.local-nav__item--04 > * {
        background-image: url(../img/10th/btn_04.png);
      }

.local-nav__item--05 > * {
        background-image: url(../img/10th/btn_05.png);
      }

.local-nav__item--06 > * {
        background-image: url(../img/10th/btn_06.png);
      }

.local-nav__item--07 > * {
        background-image: url(../img/10th/btn_07.png);
      }

.local-nav__item--08 > * {
        background-image: url(../img/10th/btn_08.png);
      }

.local-nav__item--09 > * {
        background-image: url(../img/10th/btn_09.png);
      }

.local-nav__item--10 > * {
        background-image: url(../img/10th/btn_10.png);
      }

.local-nav__item--noimg > * {
        background-image: url(../img/10th/btn_blank.png);
      }

.art ~ .art {
    margin-top: 50px;
  }

.art__ttl img {
      display: block;
    }

.art__body {
    padding: 30px 40px;
    background-color: #eaf7ff;
  }

.art .lead {
    padding-bottom: 10px;
    margin-bottom: 10px;
    border-bottom: 1px solid #000;
    font-size: 18px;
  }

.grid {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}

.grid > *:first-child {
      -webkit-box-flex: 0;
          -ms-flex: 0 0 40.5%;
              flex: 0 0 40.5%;
      max-width: 40.5%;
    }

.grid > *:first-child img {
        display: block;
      }

.grid > *:last-child {
      -webkit-box-flex: 1;
          -ms-flex: 1;
              flex: 1;
      padding-left: 20px;
    }

.video-wrap {
  position: relative;
  padding-top: 56.25%;
  background: #CCC;

}

.video-wrap > * {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }

.box ~ .box {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #000;
  }

.box h3 {
    font-size: 48px;
    font-size: 3rem;
    line-height: 1.4;
    font-weight: bold;
  }

.box .cnt p {
      font-size: 18px;
    }

.box .cnt p ~ p {
      margin-top: 10px;
    }

.box .link-txt {
    text-align: right;
  }

.box .link-txt a {
      color: #fd4b9f;
    }

.box .link-txt a::after {
        content: "";
        display: inline-block;
        width: .8em;
        height: .8em;
        background: url(../img/10th/ar.png) 0 0 no-repeat;
        background-size: 100%;
      }

.box .link-txt a:hover {
        opacity: .7;
      }

.box > *:not(:first-child) {
    margin-top: 20px;
  }

@media only screen and (max-width: 768px) {
  #mainContents {
    padding-top: 10px;
  }

.header {
    padding-bottom: 44.44444%
}
    .sect-aniv__ttl {
      margin-bottom: 10px;
    }
    .sect-aniv__nav {
      margin-bottom: 10px;
    }

.local-nav {
    margin: 0 -5px -10px
}
    .local-nav__item {
      padding: 0 5px 10px;
    }
      .local-nav__item > * {
        padding-top: 27.77778%;
      }
        .local-nav__item--01 > * {
          background-image: url(../img/10th/btn_01_sp.png);
        }
        .local-nav__item--02 > * {
          background-image: url(../img/10th/btn_02_sp.png);
        }
        .local-nav__item--03 > * {
          background-image: url(../img/10th/btn_03_sp.png);
        }
        .local-nav__item--04 > * {
          background-image: url(../img/10th/btn_04_sp.png);
        }
        .local-nav__item--05 > * {
          background-image: url(../img/10th/btn_05_sp.png);
        }
        .local-nav__item--06 > * {
          background-image: url(../img/10th/btn_06_sp.png);
        }
        .local-nav__item--07 > * {
          background-image: url(../img/10th/btn_07_sp.png);
        }
        .local-nav__item--08 > * {
          background-image: url(../img/10th/btn_08_sp.png);
        }
        .local-nav__item--09 > * {
          background-image: url(../img/10th/btn_09_sp.png);
        }
        .local-nav__item--10 > * {
          background-image: url(../img/10th/btn_10_sp.png);
        }
        .local-nav__item--noimg > * {
          background-image: url(../img/10th/btn_blank_sp.png);
        }
    .art ~ .art {
      margin-top: 20px;
    }
    .art__body {
      padding: 20px 15px;
    }
    .art .lead {
      font-size: 16px;
    }
      .grid > *:first-child {
        -webkit-box-flex: 0;
            -ms-flex: 0 0 37.33333%;
                flex: 0 0 37.33333%;
        max-width: 37.33333%;
      }
    .box ~ .box {
      margin-top: 20px;
    }
    .box h3 {
      font-size: 2.4rem;
    }
      .box .cnt p {
        font-size: 14px;
        line-height: 1.5;
      }
}