@charset "UTF-8";
@media screen and (min-width: 769px), print {
  .activity .ttl h1 {
    padding-left: 60px;
  }
  .activity .ttl h1::before {
    width: 55px;
    height: 51px;
    background: url("../../images/activity/icon_ttl.webp") no-repeat;
    top: -7px;
    left: -3px;
  }
  .activity_main {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
    -moz-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
    padding: 11px 0 105px;
    flex-direction: column-reverse;
    margin-top: 50px;
    /* 参観について */
    /* 自宅課題 */
  }
  .activity_main .open_content {
    margin-top: 36px;
  }
  .activity_main .open_content .section:first-of-type {
    margin-top: 36px;
  }
  .activity_main .open_content .section:not(:first-of-type) {
    margin-top: 30px;
  }
  .activity_main .open_content .section h3 {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 14px;
    position: relative;
    padding-left: 2.2em;
  }
  .activity_main .open_content .section h3::before {
    content: "";
    position: absolute;
    width: 36px;
    height: 36px;
    background: url(../../images/common/pen.webp) 0 0 no-repeat;
    -moz-background-size: contain;
    background-size: contain;
    left: 0;
    bottom: 2px;
  }
  .activity_main .open_content .section h3::after {
    content: "";
    position: absolute;
    width: calc(100% - 38px);
    height: 2px;
    background: url(../../images/common/line.webp) 0 0 repeat;
    bottom: 0;
    left: 38px;
  }
  .activity_main .open_content .section:nth-of-type(6) .flex {
    display: flex;
    justify-content: space-between;
  }
  .activity_main .open_content .section:nth-of-type(6) .flex p {
    width: min(70%, 710px);
  }
  .activity_main .open_content .section:nth-of-type(6) .flex figure {
    width: min(30%, 300px);
  }
  .activity_main .open_content .section:nth-of-type(6) .flex figure img {
    width: 100%;
    object-fit: cover;
    aspect-ratio: 300/225;
  }
  .activity_main .open_content .section:nth-of-type(8) ul {
    margin-top: 5px;
    font-size: 1.6rem;
  }
  .activity_main .open_content .section:nth-of-type(8) ul li {
    position: relative;
    padding-left: 1.5em;
  }
  .activity_main .open_content .section:nth-of-type(8) ul li::before {
    content: "●";
    position: absolute;
    left: 5px;
    top: 5px;
    font-size: 1rem;
  }
  .activity_main .open_content .section:nth-of-type(8) small {
    font-size: 1.6rem;
  }
  .activity_main .homework_content {
    margin-top: 36px;
  }
  .activity_main .homework_content .section:first-of-type {
    margin-top: 36px;
  }
  .activity_main .homework_content .section:not(:first-of-type) {
    margin-top: 30px;
  }
  .activity_main .homework_content .section h3 {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 14px;
    position: relative;
    padding-left: 2.2em;
  }
  .activity_main .homework_content .section h3::before {
    content: "";
    position: absolute;
    width: 36px;
    height: 36px;
    background: url(../../images/common/pen.webp) 0 0 no-repeat;
    -moz-background-size: contain;
    background-size: contain;
    left: 0;
    bottom: 2px;
  }
  .activity_main .homework_content .section h3::after {
    content: "";
    position: absolute;
    width: calc(100% - 38px);
    height: 2px;
    background: url(../../images/common/line.webp) 0 0 repeat;
    bottom: 0;
    left: 38px;
  }
  .activity_main .homework_content .section:first-of-type h3::before, .activity_main .homework_content .section:nth-of-type(2) h3::before {
    top: 0;
  }
  .activity_main .homework_content .section:first-of-type h3::after, .activity_main .homework_content .section:nth-of-type(2) h3::after {
    bottom: 9px;
  }
  .activity_main .homework_content .section:first-of-type h3 span, .activity_main .homework_content .section:nth-of-type(2) h3 span {
    font-size: 1.5em;
    vertical-align: -3px;
  }
  .activity_main .homework_content .section:nth-of-type(3) .flex {
    display: flex;
    justify-content: center;
    column-gap: 30px;
  }
  .activity_main .homework_content .section:nth-of-type(3) .flex figure {
    width: min(50%, 300px);
  }
  .activity_main .homework_content .section:nth-of-type(3) .flex figure img {
    width: 100%;
    object-fit: cover;
    aspect-ratio: 300/225;
  }
  .activity_main .homework_content .section:nth-of-type(3) p {
    margin-top: 14px;
  }
  .activity_main .homework_content .section:nth-of-type(3) table {
    margin-top: 14px;
  }
  .activity_main .homework_content .section:nth-of-type(3) table tbody tr td {
    border: 1px solid #AFAFAF;
    font-size: 1.6rem;
    vertical-align: middle;
  }
  .activity_main .homework_content .section:nth-of-type(3) table tbody tr td:first-child {
    color: #FE0000;
    font-weight: bold;
    background-color: #FFE5E5;
    width: 120px;
    text-align: center;
  }
  .activity_main .homework_content .section:nth-of-type(3) table tbody tr td:last-child {
    background-color: #fff;
    padding: 23px 40px 23px 26px;
  }
  .activity_main .homework_content .section:last-of-type p {
    border: 3px solid #6DCC14;
    position: relative;
    padding: 30px 20px 20px;
    margin-top: 24px;
  }
  .activity_main .homework_content .section:last-of-type p span {
    position: absolute;
    left: 20px;
    top: -12px;
    background-color: #6DCC14;
    border-radius: 100vh;
    color: #fff;
    width: 152px;
    height: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .activity_work {
    width: 100%;
  }
  .activity_work.ichiran {
    width: 100%;
    margin-top: 50px;
  }
  .activity_work.ichiran article .info .naiyo, .activity_work.ichiran article .info .kotei, .activity_work.ichiran article .info .moshikomi, .activity_work.ichiran article .info .biko {
    display: none;
  }
  .activity_work.ichiran .btn {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
  }
  .activity_work .heading_txt h3 {
    border-top: 2px solid #03a744;
    border-bottom: 2px solid #03a744;
    color: #03a744;
    padding: 22px 0;
    font-size: 2.8rem;
    line-height: 26px;
    text-align: center;
    font-weight: bold;
    margin-bottom: 14px;
    position: relative;
  }
  .activity_work .heading_txt h3 span {
    background: #fcff00;
    font-size: 1.6rem;
    line-height: 26px;
    padding: 9px 16px 7px;
    position: absolute;
    right: 0;
    top: 50%;
    color: #000;
    -webkit-transform: translateY(-50%);
    -moz-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
  }
  .activity_work .heading_txt p {
    font-size: 1.6rem;
    line-height: 28px;
    font-weight: bold;
    margin-bottom: 15px;
  }
  .activity_work article {
    width: 100%;
    border: 1px solid #e5e5e5;
    margin-left: -2px;
    margin-top: 29px;
  }
  .activity_work article:first-of-type {
    margin-top: 0;
  }
  .activity_work article h4 {
    border-bottom: 1px solid #e5e5e5;
  }
  .activity_work article h4::after {
    content: "";
    display: table;
    clear: both;
  }
  .activity_work article h4 small {
    float: left;
    background: #fc3b3b;
    padding: 17px 20px 17px 17px;
    font-weight: normal;
    font-size: 1.6rem;
    color: #fff;
    margin-right: 7px;
  }
  .activity_work article h4 span {
    font-weight: bold;
    font-size: 1.8rem;
    line-height: 25px;
    color: #fc3b3b;
    height: 58px;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
  }
  .activity_work article h4 span img {
    margin: 0 5px;
    width: 18%;
  }
  .activity_work article > p {
    border-bottom: 1px solid #e5e5e5;
    font-size: 1.4rem;
    line-height: 22px;
    padding: 12px 18px 13px;
    text-align: justify;
  }
  .activity_work article .detail_box {
    border-bottom: 1px solid #e5e5e5;
    overflow: hidden;
    padding: 20px;
  }
  .activity_work article .detail_box > span {
    float: right;
    margin-left: 30px;
    width: 40%;
  }
  .activity_work article .detail_box > span img {
    height: auto;
    width: 100%;
  }
  .activity_work article .info {
    color: #000;
    background-color: initial;
    border-color: #bee5eb;
    padding: 0;
    margin-bottom: 0;
  }
  .activity_work article .info dl {
    border-bottom: 1px solid #e5e5e5;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    font-size: 1.4rem;
    line-height: 22px;
  }
  .activity_work article .info dl:last-child {
    border-bottom: none;
  }
  .activity_work article .info dl dt {
    width: 88px;
    background: #fef5f5;
    border-right: 1px solid #e5e5e5;
    text-align: center;
    color: #fc3b3b;
    font-weight: bold;
    padding: 9px 0;
  }
  .activity_work article .info dl dt span {
    margin-right: 15px;
  }
  .activity_work article .info dl dd {
    width: -webkit-calc(100% - 88px);
    width: -moz-calc(100% - 88px);
    width: calc(100% - 88px);
    padding: 9px 26px;
  }
  .activity_work article .info dl dd p {
    margin-bottom: 10px;
  }
  .activity_work article .info dl dd p a {
    color: #000;
    border-bottom: 1px solid #666666;
  }
  .activity_work .btn {
    background-color: red;
    -moz-border-radius: 4px;
    border-radius: 4px;
    display: none;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -moz-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    height: 60px;
    margin-top: 10px;
    margin-left: auto;
    width: 210px;
    border: none;
  }
  .activity_work .btn span {
    color: #fff;
  }
  .activity .aside .activity_sidebar {
    margin-bottom: 20px;
  }
  .activity .aside .activity_sidebar li:last-child a {
    height: 60px;
    border-bottom: 2px solid #03a744;
  }
  .activity .aside .activity_sidebar li a {
    display: block;
    height: 58px;
    color: #03a744;
    font-size: 1.6rem;
    line-height: 56px;
    position: relative;
    padding-left: 15px;
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    transition: all 0.3s ease;
    border: 2px solid #03a744;
    border-bottom: none;
    opacity: 1;
    overflow: hidden;
  }
  .activity .aside .activity_sidebar li a:hover, .activity .aside .activity_sidebar li a.active {
    color: #fff;
    opacity: 1;
  }
  .activity .aside .activity_sidebar li a:hover:before, .activity .aside .activity_sidebar li a.active:before {
    -webkit-transform: scale3d(12, 9, 1);
    -moz-transform: scale3d(12, 9, 1);
    transform: scale3d(12, 9, 1);
  }
  .activity .aside .activity_sidebar li a:hover:after, .activity .aside .activity_sidebar li a.active:after {
    background: url(../images/arrow_side_hv.webp) 0 0 no-repeat;
    -moz-background-size: contain;
    background-size: contain;
  }
  .activity .aside .activity_sidebar li a:after {
    position: absolute;
    content: "";
    width: 9px;
    height: 15px;
    background: url(../images/arrow_side.webp) 0 0 no-repeat;
    -moz-background-size: contain;
    background-size: contain;
    top: 50%;
    -webkit-transform: translateY(-50%);
    -moz-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
    right: 19px;
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    transition: all 0.3s ease;
  }
  .activity .aside .activity_sidebar li a:before {
    content: "";
    z-index: -1;
    position: absolute;
    background: #03a744;
    top: 50%;
    right: 100%;
    margin: -15px 0 0 1px;
    width: 30px;
    height: 30px;
    -webkit-transform-origin: 0 50%;
    -moz-transform-origin: 0 50%;
    -ms-transform-origin: 0 50%;
    transform-origin: 0 50%;
    -webkit-transform: scale3d(1, 2, 1);
    -moz-transform: scale3d(1, 2, 1);
    transform: scale3d(1, 2, 1);
    -webkit-transition: opacity 0.3s, -webkit-transform 0.3s;
    transition: opacity 0.3s, -webkit-transform 0.3s;
    -moz-transition: transform 0.3s, opacity 0.3s, -moz-transform 0.3s;
    transition: transform 0.3s, opacity 0.3s;
    transition: transform 0.3s, opacity 0.3s, -webkit-transform 0.3s, -moz-transform 0.3s;
    -webkit-transition-timing-function: cubic-bezier(0.7, 0, 0.9, 1);
    -moz-transition-timing-function: cubic-bezier(0.7, 0, 0.9, 1);
    transition-timing-function: cubic-bezier(0.7, 0, 0.9, 1);
  }
  .activity .main_index {
    padding-bottom: 176px;
  }
  .activity .activity_content {
    margin-top: 50px;
  }
  .activity .activity_content h2 {
    font-weight: bold;
    font-size: 2.6rem;
    line-height: 26px;
    color: #03a744;
    border-top: 2px solid #03a744;
    border-bottom: 2px solid #03a744;
    padding: 22px 0;
    text-align: center;
    margin-bottom: 20px;
  }
  .activity .activity_content p {
    font-size: 1.6rem;
  }
  .activity .activity_content .theme_class {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
    -moz-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: flex-start;
    column-gap: 20px;
    margin: 29px 0;
  }
  .activity .activity_content .theme_class .box {
    width: 160px;
    border: 4px solid #e5e5e5;
    -moz-border-radius: 7px;
    border-radius: 7px;
    padding: 16px 12px 14px;
    position: relative;
    cursor: pointer;
  }
  .activity .activity_content .theme_class .box::before {
    content: "";
    border-left: 13px solid transparent;
    border-right: 13px solid transparent;
    border-top: 18px solid #e5e5e5;
    position: absolute;
    bottom: -18px;
    left: 50%;
    -webkit-transform: translateX(-50%);
    -moz-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
    transform: translateX(-50%);
  }
  .activity .activity_content .theme_class .box::after {
    content: "";
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 12px solid #fff;
    position: absolute;
    bottom: -12px;
    left: 50%;
    -webkit-transform: translateX(-50%);
    -moz-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
    transform: translateX(-50%);
  }
  .activity .activity_content .theme_class .box:last-of-type {
    width: 540px;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
  }
  .activity .activity_content .theme_class .box span {
    display: block;
    font-style: normal;
    font-weight: bold;
    font-size: 1.8rem;
    line-height: 22px;
    margin-bottom: 2px;
  }
  .activity .activity_content .theme_class .box small {
    display: block;
    font-weight: bold;
    font-size: 1.4rem;
    line-height: 22px;
  }
  .activity .activity_content .theme_class .box small.color_01 {
    color: #4fb1e4;
  }
  .activity .activity_content .theme_class .box small.color_02 {
    color: #fe8524;
  }
  .activity .activity_content .theme_class .box small.color_03 {
    color: #f978bb;
  }
  .activity .activity_content .theme_class .box small.color_04 {
    color: #03a744;
  }
  .activity .activity_content .theme_class .box .prep_btn {
    color: #000;
  }
  .activity .activity_content .theme_class .box .prep_btn:hover {
    opacity: 0.5;
  }
  .activity .activity_content .theme_class .box .item {
    border-right: 1px dotted #03a744;
    padding-right: 15px;
    margin-right: 13px;
    color: #000;
  }
  .activity .activity_content .theme_class .box .item:hover {
    opacity: 0.5;
  }
  .activity .activity_content .theme_class .box .item:nth-of-type(2) {
    padding-right: 23px;
    margin-right: 15px;
  }
  .activity .activity_content .theme_class .box .item:last-of-type {
    margin-right: 0;
    padding-right: 0;
    border: none;
  }
  .activity .activity_content article {
    margin-bottom: 80px;
  }
  .activity .activity_content article.prep_class {
    margin-top: 54px;
  }
  .activity .activity_content article.prep_class h4 {
    background: url("../../images/activity/bg_prep_class.webp") repeat;
    background-size: 100%;
  }
  .activity .activity_content article.prep_class .block .number {
    background: url("../../images/activity/bg_block_01.webp") no-repeat;
  }
  .activity .activity_content article.prep_class .block dl dt {
    background: #e7f6fd;
    color: #45a4e0;
  }
  .activity .activity_content article.prep_class .box_class .text h5 {
    background-image: url("../../images/activity/bg_tt_prep.webp");
  }
  .activity .activity_content article.level_class {
    margin: 54px 0 0;
  }
  .activity .activity_content article.level_class .maru {
    padding-left: 20px;
    position: relative;
  }
  .activity .activity_content article.level_class .maru::before {
    content: "●";
    font-size: 1.6rem;
    line-height: 31px;
    color: #000;
    position: absolute;
    left: 0;
    top: 0;
  }
  .activity .activity_content article.level_class h4 {
    background: url("../../images/activity/bg_level_class.webp") repeat;
    background-size: 100%;
  }
  .activity .activity_content article.level_class > p {
    margin-bottom: 19px;
  }
  .activity .activity_content article.level_class .block .number {
    background: url("../../images/activity/bg_block_02.webp") no-repeat;
  }
  .activity .activity_content article.level_class .block .text {
    padding-bottom: 16px;
  }
  .activity .activity_content article.level_class .block dl:nth-of-type(2) dd {
    padding-bottom: 6px;
  }
  .activity .activity_content article.level_class .block dl dt {
    background: #fff1e5;
    color: #fe8524;
  }
  .activity .activity_content article.level_class .box_class .text h5 {
    background-image: url("../../images/activity/bg_tt_level.webp");
  }
  .activity .activity_content article h4 {
    width: 100%;
    height: 62px;
    font-weight: bold;
    font-size: 2.4rem;
    line-height: 66px;
    text-align: center;
    margin-bottom: 10px;
  }
  .activity .activity_content article > p {
    font-weight: bold;
    font-size: 1.6rem;
    line-height: 28px;
    padding-left: 3px;
    letter-spacing: 1px;
    margin-bottom: 15px;
  }
  .activity .activity_content article > p span {
    font-weight: normal;
  }
  .activity .activity_content article > p.note {
    font-weight: normal;
    font-size: 1.4rem;
    line-height: 38px;
    margin: 0;
  }
  .activity .activity_content article > p.note.furikae {
    margin-top: 10px;
    line-height: 1.75;
  }
  .activity .activity_content article small.icon {
    width: 23px;
    height: 23px;
    display: inline-block;
    font-size: 1.4rem;
    line-height: 24px;
    color: #fff;
    text-align: center;
    -moz-border-radius: 20px;
    border-radius: 20px;
  }
  .activity .activity_content article small.icon.new {
    background: #ff4c4c;
  }
  .activity .activity_content article small.icon.new + a {
    color: #000;
  }
  .activity .activity_content article small.icon.flag {
    background: #db71f2;
  }
  .activity .activity_content article small.icon.three {
    background: #6dcc16;
  }
  .activity .activity_content article small.icon.autumn {
    background: #4cadff;
  }
  .activity .activity_content article small.icon.autumn + a {
    color: #000;
  }
  .activity .activity_content article .annot {
    margin-top: 20px;
  }
  .activity .activity_content article .annot p {
    font-weight: bold;
    color: #333;
    padding-left: 3px;
  }
  .activity .activity_content article .departure {
    background: #f2f2f2;
    -moz-border-radius: 6px;
    border-radius: 6px;
    padding: 12px 20px;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    margin: 28px 0 18px;
    align-items: center;
  }
  .activity .activity_content article .departure p {
    width: 178px;
    border-right: 1px solid #000;
    display: block;
    font-style: normal;
    font-weight: bold;
    font-size: 1.4rem;
    line-height: 19px;
    margin: 0;
  }
  .activity .activity_content article .departure ul {
    width: -webkit-calc(100% - 107px);
    width: -moz-calc(100% - 107px);
    width: calc(100% - 107px);
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    padding-left: 20px;
  }
  .activity .activity_content article .departure ul li {
    margin-right: 13px;
  }
  .activity .activity_content article .departure ul li:last-of-type {
    margin-right: 0;
  }
  .activity .activity_content article .departure ul li .station {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    color: #000;
  }
  .activity .activity_content article .departure ul li small {
    margin-right: 6px;
  }
  .activity .activity_content article .departure ul li span {
    display: block;
    font-weight: bold;
    font-size: 1.4rem;
    line-height: 28px;
    position: relative;
  }
  .activity .activity_content article .block {
    position: relative;
    border: 1px solid #e5e5e5;
    margin-top: 20px;
  }
  .activity .activity_content article .block:first-of-type {
    margin-top: 0;
  }
  .activity .activity_content article .block .number {
    width: 93px;
    height: 79px;
    display: block;
    font-weight: bold;
    font-size: 1.8rem;
    line-height: 20px;
    color: #fff;
    letter-spacing: 5px;
    padding-top: 3px;
    text-align: center;
    position: absolute;
    top: -1px;
    left: 35px;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
  }
  .activity .activity_content article .block .number i {
    font-style: normal;
    font-family: "Roboto", sans-serif;
    font-weight: 400;
    font-size: 2.3em;
    line-height: 20px;
    display: block;
    margin-top: 6px;
  }
  .activity .activity_content article .block .text {
    padding: 44px 40px 18px 35px;
  }
  .activity .activity_content article .block .text .title {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: end;
    -moz-box-align: end;
    -ms-flex-align: end;
    align-items: flex-end;
    -webkit-box-pack: justify;
    -moz-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
    margin-bottom: 18px;
  }
  .activity .activity_content article .block .text .title h5 {
    width: min(50%, 500px);
    font-weight: bold;
    font-size: 2.4rem;
    line-height: 44px;
    border-bottom: 3px solid #000;
    margin-bottom: 18px;
    padding-top: 40px;
    -webkit-box-ordinal-group: 2;
    -moz-box-ordinal-group: 2;
    -ms-flex-order: 1;
    order: 1;
  }
  .activity .activity_content article .block .text .title h5 span {
    display: block;
    font-weight: 400;
    font-size: 1.8rem;
    line-height: 20px;
    margin-bottom: 14px;
  }
  .activity .activity_content article .block .text .title figure {
    width: 230px;
    max-width: 230px;
    overflow: hidden;
    -webkit-box-ordinal-group: 3;
    -moz-box-ordinal-group: 3;
    -ms-flex-order: 2;
    order: 2;
  }
  .activity .activity_content article .block .text .title figure img {
    width: 100%;
    max-width: 100%;
  }
  .activity .activity_content article .block .text .long_title {
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
  }
  .activity .activity_content article .block .text .long_title h5 {
    margin-top: 45px;
  }
  .activity .activity_content article .block .text p {
    font-size: 1.6rem;
    line-height: 28px;
  }
  .activity .activity_content article .block .text p .text_bold {
    font-weight: bold;
  }
  .activity .activity_content article .block dl {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    border-top: 1px solid #e5e5e5;
  }
  .activity .activity_content article .block dl:nth-of-type(2) dd {
    padding-top: 9px;
    padding-bottom: 9px;
  }
  .activity .activity_content article .block dl:nth-of-type(3) dd {
    padding-top: 1px;
    padding-bottom: 16px;
  }
  .activity .activity_content article .block dl dt {
    width: 89px;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -moz-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    border-right: 1px solid #e5e5e5;
    font-weight: bold;
    font-size: 1.4rem;
    line-height: 22px;
  }
  .activity .activity_content article .block dl dd {
    width: -webkit-calc(100% - 89px);
    width: -moz-calc(100% - 89px);
    width: calc(100% - 89px);
    padding: 8px 40px 9px 26px;
  }
  .activity .activity_content article .block dl dd p {
    font-size: 1.4rem;
    line-height: 22px;
    margin: 15px 0 15px;
  }
  .activity .activity_content article .block dl dd ul.date {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    margin-top: 15px;
  }
  .activity .activity_content article .block dl dd ul.date li {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    padding: 2px 0;
    margin-right: 15px;
    letter-spacing: 1px;
    width: 165px;
  }
  .activity .activity_content article .block dl dd ul.date li dl {
    border: none;
    width: 100%;
  }
  .activity .activity_content article .block dl dd ul.date li dl dt {
    border: none;
    background: none;
    width: 82px;
    display: block;
    text-align: left;
    color: #000;
    font-weight: 400;
    font-size: 1.4rem;
    line-height: 22px;
  }
  .activity .activity_content article .block dl dd ul.date li dl dd {
    width: 50%;
    padding: 0;
  }
  .activity .activity_content article .block dl dd ul.date li small {
    margin-left: 4px;
  }
  .activity .activity_content article .block dl dd p small {
    margin: 0 4px;
  }
  .activity .activity_content article .block dl dd label {
    display: inline-block;
    min-width: 166px;
    height: 30px;
    font-weight: bold;
    font-size: 1.4rem;
    line-height: 30px;
    color: #fff;
    text-align: center;
    padding: 0 10px;
    margin: 15px 0 8px;
  }
  .activity .activity_content article .block dl dd label.primary {
    background: #fe8524;
    margin: 12px 0 8px;
  }
  .activity .activity_content article .block dl dd label.middle {
    background: #f978bb;
  }
  .activity .activity_content article .block dl dd label.advance {
    background: #03a744;
  }
  .activity .activity_content .special {
    margin-top: 80px;
  }
  .activity .activity_content .special.no-margin {
    margin-top: 0;
  }
  .activity .activity_content .special article .block dl:nth-of-type(3) dd {
    padding-top: 9px;
    padding-bottom: 9px;
  }
  .activity .activity_content .special article .block dl dt {
    background: #fef5f5;
    color: #fc3b3b;
  }
  .activity .report_main {
    padding-bottom: 70px;
  }
  .activity .report_main h3 {
    margin-bottom: 14px;
  }
  .activity .report_main .activities {
    margin-bottom: 30px;
  }
  .activity .report_main .activities > p {
    font-weight: bold;
    font-size: 1.6rem;
    line-height: 28px;
    margin-bottom: 17px;
  }
  .activity .report_main .activities .info {
    width: 100%;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    border: 1px solid #e5e5e5;
    margin-left: -2px;
  }
  .activity .report_main .activities .info .warning {
    width: 149px;
    background: #fcff00;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -moz-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -moz-box-orient: vertical;
    -moz-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
  }
  .activity .report_main .activities .info .warning small {
    display: block;
    font-size: 1.4rem;
    line-height: 20px;
  }
  .activity .report_main .activities .info .warning small::before {
    content: "";
    display: block;
    width: 34px;
    height: 34px;
    background: url("../images/icon_warning.webp") no-repeat;
    margin: 0 auto 4px;
  }
  .activity .report_main .activities .info .warning em {
    display: block;
    font-style: normal;
    font-weight: bold;
    font-size: 2rem;
    line-height: 24px;
  }
  .activity .report_main .activities .info p {
    width: -webkit-calc(100% - 149px);
    width: -moz-calc(100% - 149px);
    width: calc(100% - 149px);
    font-size: 1.4rem;
    line-height: 22px;
    padding: 8px 20px 6px 15px;
  }
  .activity .report_main article {
    margin-bottom: 51px;
  }
  .activity .report_main article.level_class {
    margin-bottom: 0;
  }
  .activity .report_main article.level_class .box_class {
    margin-bottom: 32px;
  }
  .activity .report_main article h4 {
    margin-bottom: 24px;
  }
  .activity .report_main .box_class {
    width: 100%;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    margin-bottom: 43px;
  }
  .activity .report_main .box_class:last-of-type {
    margin-bottom: 0;
  }
  .activity .report_main .box_class:nth-child(odd) .text {
    -webkit-box-ordinal-group: 3;
    -moz-box-ordinal-group: 3;
    -ms-flex-order: 2;
    order: 2;
  }
  .activity .report_main .box_class:nth-child(odd) figure {
    -webkit-box-ordinal-group: 2;
    -moz-box-ordinal-group: 2;
    -ms-flex-order: 1;
    order: 1;
    text-align: left;
  }
  .activity .report_main .box_class:nth-child(odd) figure img {
    width: 80%;
  }
  .activity .report_main .box_class .text {
    width: calc(100% - 350px);
    margin-left: -2px;
  }
  .activity .report_main .box_class .text h5 {
    height: 42px;
    font-weight: bold;
    font-size: 1.8rem;
    line-height: 42px;
    color: #fff;
    position: relative;
    padding: 0 20px;
    margin-bottom: 7px;
  }
  .activity .report_main .box_class .text h5::after {
    content: "";
    border-top: 21px solid transparent;
    border-bottom: 21px solid transparent;
    border-right: 13px solid #fff;
    position: absolute;
    top: 0;
    right: 0;
  }
  .activity .report_main .box_class .text h5 span {
    font-size: 1.6rem;
  }
  .activity .report_main .box_class .text span {
    font-size: 1.8rem;
    font-weight: bold;
  }
  .activity .report_main .box_class .text p {
    font-size: 1.6rem;
    line-height: 31px;
  }
  .activity .report_main .box_class figure {
    width: 350px;
    text-align: right;
    padding-top: 3px;
  }
  .archive ul {
    margin: 20px 0;
  }
  .archive li {
    padding: 8px 0;
    border-bottom: 1px dotted #ccc;
  }
  .archive li:last-child {
    border-bottom: none;
  }
  .archive a {
    color: #000;
    font-size: 1.6rem;
  }
  .archive a::before {
    content: ">";
    color: #03a744;
    margin-right: 10px;
  }
  .rtn_btn {
    text-align: center;
  }
  .rtn_btn p {
    width: 300px;
    text-align: center;
    font-size: 1.6rem;
    position: relative;
    display: inline-block;
  }
  .rtn_btn a {
    display: block;
    background: #03a744;
    color: #fff;
    -moz-border-radius: 7px;
    border-radius: 7px;
    padding: 10px 0;
  }
  .rtn_btn a:hover {
    color: #fff;
  }
  .rtn_btn a::after {
    content: ">";
    position: absolute;
    right: 15px;
  }
  /* 過去のレポートアーカイブページのスタイル崩れ対策 */
  .post-type-archive-report a {
    font-size: 1.4rem;
  }
  .post-type-archive-report a::before, .post-type-archive-report a::after {
    content: none;
  }
  .post-type-archive-report a ul {
    margin: 0;
  }
  .post-type-archive-report a li {
    padding: 0;
    border-bottom: none;
  }
}
@media screen and (max-width: 768px) {
  .activity .ttl h1 {
    padding-left: 50px;
  }
  .activity .ttl h1::before {
    width: 38px;
    height: 38px;
    background-image: url("../../images/activity/icon_ttl.webp");
    top: -1px;
    left: 4px;
  }
  .activity_main {
    padding: 0 10px;
    display: flex;
    flex-direction: column-reverse;
    padding-bottom: 100px;
    margin-top: 50px;
    /* 参観について */
    /* 自宅課題 */
  }
  .activity_main .open_content {
    margin-top: 36px;
  }
  .activity_main .open_content .section:first-of-type {
    margin-top: 36px;
  }
  .activity_main .open_content .section:not(:first-of-type) {
    margin-top: 30px;
  }
  .activity_main .open_content .section h3 {
    font-size: 1.4rem;
    font-weight: bold;
    margin-bottom: 14px;
    position: relative;
    padding-left: 2.2em;
  }
  .activity_main .open_content .section h3::before {
    content: "";
    position: absolute;
    width: 26px;
    height: 26px;
    background: url(../../images/common/pen.webp) 0 0 no-repeat;
    -moz-background-size: contain;
    background-size: contain;
    left: 0;
    bottom: 2px;
  }
  .activity_main .open_content .section h3::after {
    content: "";
    position: absolute;
    width: calc(100% - 25px);
    height: 2px;
    background: url(../../images/common/line.webp) 0 0 repeat;
    bottom: 0;
    left: 25px;
  }
  .activity_main .open_content .section:nth-of-type(6) .flex {
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    row-gap: 20px;
  }
  .activity_main .open_content .section:nth-of-type(6) .flex p {
    width: 100%;
  }
  .activity_main .open_content .section:nth-of-type(6) .flex figure {
    width: 100%;
  }
  .activity_main .open_content .section:nth-of-type(6) .flex figure img {
    width: 100%;
    object-fit: cover;
    aspect-ratio: 300/225;
  }
  .activity_main .open_content .section:nth-of-type(8) ul {
    margin-top: 5px;
    font-size: 1.4rem;
  }
  .activity_main .open_content .section:nth-of-type(8) ul li {
    position: relative;
    padding-left: 1.5em;
  }
  .activity_main .open_content .section:nth-of-type(8) ul li::before {
    content: "●";
    position: absolute;
    left: 5px;
    top: 5px;
    font-size: 1rem;
  }
  .activity_main .open_content .section:nth-of-type(8) small {
    font-size: 1.6rem;
  }
  .activity_main .homework_content {
    margin-top: 36px;
  }
  .activity_main .homework_content .section:first-of-type {
    margin-top: 36px;
  }
  .activity_main .homework_content .section:not(:first-of-type) {
    margin-top: 30px;
  }
  .activity_main .homework_content .section h3 {
    font-size: 1.4rem;
    font-weight: bold;
    margin-bottom: 14px;
    position: relative;
    padding-left: 2.2em;
  }
  .activity_main .homework_content .section h3::before {
    content: "";
    position: absolute;
    width: 26px;
    height: 26px;
    background: url(../../images/common/pen.webp) 0 0 no-repeat;
    -moz-background-size: contain;
    background-size: contain;
    left: 0;
    bottom: 2px;
  }
  .activity_main .homework_content .section h3::after {
    content: "";
    position: absolute;
    width: calc(100% - 25px);
    height: 2px;
    background: url(../../images/common/line.webp) 0 0 repeat;
    bottom: 0;
    left: 25px;
  }
  .activity_main .homework_content .section:first-of-type h3::before, .activity_main .homework_content .section:nth-of-type(2) h3::before {
    top: 0;
  }
  .activity_main .homework_content .section:first-of-type h3::after, .activity_main .homework_content .section:nth-of-type(2) h3::after {
    bottom: 4px;
  }
  .activity_main .homework_content .section:first-of-type h3 span, .activity_main .homework_content .section:nth-of-type(2) h3 span {
    font-size: 1.5em;
    vertical-align: -2px;
  }
  .activity_main .homework_content .section:nth-of-type(3) .flex {
    display: flex;
    justify-content: center;
    flex-direction: column;
    row-gap: 20px;
  }
  .activity_main .homework_content .section:nth-of-type(3) .flex figure {
    width: 100%;
  }
  .activity_main .homework_content .section:nth-of-type(3) .flex figure img {
    width: 100%;
    object-fit: cover;
    aspect-ratio: 300/225;
  }
  .activity_main .homework_content .section:nth-of-type(3) p {
    margin-top: 14px;
  }
  .activity_main .homework_content .section:nth-of-type(3) table {
    margin-top: 14px;
  }
  .activity_main .homework_content .section:nth-of-type(3) table tbody tr td {
    border: 1px solid #AFAFAF;
    font-size: 1.4rem;
    vertical-align: middle;
  }
  .activity_main .homework_content .section:nth-of-type(3) table tbody tr td:first-child {
    color: #FE0000;
    font-weight: bold;
    background-color: #FFE5E5;
    width: 120px;
    text-align: center;
  }
  .activity_main .homework_content .section:nth-of-type(3) table tbody tr td:last-child {
    background-color: #fff;
    padding: 23px 15px 23px;
  }
  .activity_main .homework_content .section:last-of-type p {
    border: 3px solid #6DCC14;
    position: relative;
    padding: 30px 20px 20px;
    margin-top: 24px;
  }
  .activity_main .homework_content .section:last-of-type p span {
    position: absolute;
    left: 20px;
    top: -12px;
    background-color: #6DCC14;
    border-radius: 100vh;
    color: #fff;
    width: 152px;
    height: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .activity_work {
    padding: 7.06215% 0px 12.71186%;
  }
  .activity_work.ichiran {
    width: 100%;
  }
  .activity_work.ichiran article .info .naiyo, .activity_work.ichiran article .info .kotei, .activity_work.ichiran article .info .moshikomi, .activity_work.ichiran article .info .biko {
    display: none;
  }
  .activity_work.ichiran .btn {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
  }
  .activity_work .heading_txt h3 {
    border-top: 2px solid #03a744;
    border-bottom: 2px solid #03a744;
    color: #03a744;
    padding: 4.23729% 0;
    font-size: 2rem;
    line-height: 26px;
    font-weight: bold;
    margin-bottom: 3.53107%;
    position: relative;
  }
  .activity_work .heading_txt h3 span {
    background: #fcff00;
    font-size: 1.4rem;
    line-height: 22px;
    padding: 2.11864% 3.53107% 2.11864%;
    position: absolute;
    right: 0;
    top: 50%;
    -webkit-transform: translateY(-50%);
    -moz-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
  }
  .activity_work .heading_txt p {
    font-size: 1.4rem;
    line-height: 22px;
    margin-bottom: 7.06215%;
    font-weight: bold;
  }
  .activity_work article {
    border: 1px solid #e5e5e5;
    margin-top: 8.47458%;
  }
  .activity_work article:first-of-type {
    margin-top: 0;
  }
  .activity_work article h4 {
    font-size: 1.4rem;
    line-height: 22px;
    color: #fc3b3b;
    border-bottom: 1px solid #e5e5e5;
    padding: 0 0 3.81356%;
    font-weight: bold;
    text-align: center;
  }
  .activity_work article h4 small {
    width: 59.49008%;
    display: block;
    background: #fc3b3b;
    font-weight: normal;
    font-size: 1.4rem;
    line-height: 20px;
    color: #fff;
    padding: 2.82486% 0;
    margin: -1px auto 2.82486%;
  }
  .activity_work article h4 span img {
    margin: 0 5px;
    width: 18%;
  }
  .activity_work article > p {
    border-bottom: 1px solid #e5e5e5;
    font-size: 1.4rem;
    line-height: 20px;
    padding: 3.53107% 5.36723%;
    text-align: justify;
  }
  .activity_work article .detail_box {
    border-bottom: 1px solid #e5e5e5;
    overflow: hidden;
    padding: 20px;
  }
  .activity_work article .detail_box > span {
    display: block;
    float: none;
    margin-bottom: 10px;
  }
  .activity_work article .detail_box > span img {
    height: auto;
    width: 100%;
  }
  .activity_work article .info {
    color: #000;
    background-color: initial;
    border-color: #bee5eb;
    padding: 0;
    margin-bottom: 0;
  }
  .activity_work article .info dl {
    border-bottom: 1px solid #e5e5e5;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    font-size: 1.4rem;
    line-height: 20px;
  }
  .activity_work article .info dl:last-child {
    border-bottom: none;
  }
  .activity_work article .info dl dt {
    width: 80px;
    border-right: 1px solid #e5e5e5;
    text-align: center;
    color: #fc3b3b;
    font-weight: bold;
    padding: 3.67232% 0;
  }
  .activity_work article .info dl dd {
    width: -webkit-calc(100% - 80px);
    width: -moz-calc(100% - 80px);
    width: calc(100% - 80px);
    padding: 3.67232% 2.82486%;
  }
  .activity_work article .info dl dd p {
    margin-bottom: 3.53107%;
  }
  .activity_work article .info dl dd p a {
    color: #000;
    border-bottom: 1px solid #666666;
  }
  .activity_work .btn {
    background-color: red;
    -moz-border-radius: 4px;
    border-radius: 4px;
    display: none;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -moz-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    height: 40px;
    margin-top: 10px;
    margin-left: auto;
    width: 40%;
    border: none;
  }
  .activity_work .btn span {
    color: #fff;
  }
  .activity .aside {
    padding: 0;
  }
  .activity .aside .activity_sidebar {
    margin-bottom: 20px;
  }
  .activity .aside .activity_sidebar li:last-child a {
    height: 50px;
    border-bottom: 2px solid #03a744;
  }
  .activity .aside .activity_sidebar li a {
    display: block;
    height: 50px;
    color: #03a744;
    font-size: 1.6rem;
    line-height: 48px;
    position: relative;
    padding-left: 15px;
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    transition: all 0.3s ease;
    border: 2px solid #03a744;
    border-bottom: none;
    opacity: 1;
    overflow: hidden;
  }
  .activity .aside .activity_sidebar li a:hover, .activity .aside .activity_sidebar li a.active {
    color: #fff;
    opacity: 1;
  }
  .activity .aside .activity_sidebar li a:hover:before, .activity .aside .activity_sidebar li a.active:before {
    width: 100%;
    -webkit-transform: scale3d(12, 9, 1);
    -moz-transform: scale3d(12, 9, 1);
    transform: scale3d(12, 9, 1);
  }
  .activity .aside .activity_sidebar li a:hover:after, .activity .aside .activity_sidebar li a.active:after {
    background: url(../images/arrow_side_hv.webp) 0 0 no-repeat;
    -moz-background-size: contain;
    background-size: contain;
  }
  .activity .aside .activity_sidebar li a:after {
    position: absolute;
    content: "";
    width: 9px;
    height: 15px;
    background: url(../images/arrow_side.webp) 0 0 no-repeat;
    -moz-background-size: contain;
    background-size: contain;
    top: 50%;
    -webkit-transform: translateY(-50%);
    -moz-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
    right: 19px;
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    transition: all 0.3s ease;
  }
  .activity .aside .activity_sidebar li a:before {
    content: "";
    z-index: -1;
    position: absolute;
    background: #03a744;
    top: 50%;
    right: 100%;
    margin: -15px 0 0 1px;
    width: 30px;
    height: 30px;
    -webkit-transform-origin: 0 50%;
    -moz-transform-origin: 0 50%;
    -ms-transform-origin: 0 50%;
    transform-origin: 0 50%;
    -webkit-transform: scale3d(1, 2, 1);
    -moz-transform: scale3d(1, 2, 1);
    transform: scale3d(1, 2, 1);
    -webkit-transition: opacity 0.3s, -webkit-transform 0.3s;
    transition: opacity 0.3s, -webkit-transform 0.3s;
    -moz-transition: transform 0.3s, opacity 0.3s, -moz-transform 0.3s;
    transition: transform 0.3s, opacity 0.3s;
    transition: transform 0.3s, opacity 0.3s, -webkit-transform 0.3s, -moz-transform 0.3s;
    -webkit-transition-timing-function: cubic-bezier(0.7, 0, 0.9, 1);
    -moz-transition-timing-function: cubic-bezier(0.7, 0, 0.9, 1);
    transition-timing-function: cubic-bezier(0.7, 0, 0.9, 1);
  }
  .activity .activity_content {
    margin-top: 50px;
  }
  .activity .activity_content h2 {
    font-weight: bold;
    font-size: 2rem;
    line-height: 25px;
    color: #03a744;
    border-top: 2px solid #03a744;
    border-bottom: 2px solid #03a744;
    padding: 2.82486% 0;
    text-align: center;
    margin-bottom: 4.23729%;
  }
  .activity .activity_content p {
    font-size: 1.4rem;
  }
  .activity .activity_content .theme_class {
    overflow: hidden;
    margin-bottom: 2.82486%;
  }
  .activity .activity_content .theme_class .box:first-of-type {
    width: -webkit-calc(50% - 5px);
    width: -moz-calc(50% - 5px);
    width: calc(50% - 5px);
    border: 2px solid #e5e5e5;
    -moz-border-radius: 7px;
    border-radius: 7px;
    padding: 10px 5px;
    float: left;
    margin-bottom: 10px;
    margin-right: 10px;
  }
  .activity .activity_content .theme_class .box .item {
    width: -webkit-calc(50% - 5px);
    width: -moz-calc(50% - 5px);
    width: calc(50% - 5px);
    float: left;
    border: 2px solid #e5e5e5;
    -moz-border-radius: 7px;
    border-radius: 7px;
    padding: 10px 5px;
    margin-bottom: 10px;
    color: #000;
  }
  .activity .activity_content .theme_class .box .item:nth-child(2) {
    margin-right: 10px;
  }
  .activity .activity_content .theme_class .box span {
    display: block;
    font-style: normal;
    font-weight: bold;
    font-size: 1.4rem;
    line-height: 18px;
    margin-bottom: 2px;
  }
  .activity .activity_content .theme_class .box small {
    display: block;
    font-weight: bold;
    font-size: 1.2rem;
    line-height: 18px;
  }
  .activity .activity_content .theme_class .box small.color_01 {
    color: #4fb1e4;
  }
  .activity .activity_content .theme_class .box small.color_02 {
    color: #fe8524;
  }
  .activity .activity_content .theme_class .box small.color_03 {
    color: #f978bb;
  }
  .activity .activity_content .theme_class .box small.color_04 {
    color: #03a744;
  }
  .activity .activity_content .prep_btn {
    color: #000;
  }
  .activity .activity_content article {
    margin-bottom: 7.06215%;
  }
  .activity .activity_content article.prep_class {
    margin-top: 54px;
  }
  .activity .activity_content article.prep_class h4 {
    background: url("../../images/activity/bg_prep_class.webp") repeat;
    background-size: 100%;
  }
  .activity .activity_content article.prep_class .block .number {
    background: url("../../images/activity/bg_block_01.webp") no-repeat;
  }
  .activity .activity_content article.prep_class .block dl dt {
    background: #e7f6fd;
    color: #45a4e0;
  }
  .activity .activity_content article.prep_class .box_class .text h5 {
    background-image: url("../../images/activity/bg_tt_prep.webp");
  }
  .activity .activity_content article.level_class {
    margin-bottom: 0;
  }
  .activity .activity_content article.level_class p.maru {
    padding-left: 20px;
    position: relative;
  }
  .activity .activity_content article.level_class p.maru::before {
    content: "●";
    font-size: 1.4rem;
    color: #000;
    position: absolute;
    left: 0;
    top: 0;
  }
  .activity .activity_content article.level_class h4 {
    background: url("../../images/activity/bg_level_class.webp") repeat;
    background-size: 100%;
  }
  .activity .activity_content article.level_class .block .number {
    background: url("../../images/activity/bg_block_02.webp") no-repeat;
  }
  .activity .activity_content article.level_class .block dl dt {
    background: #fff1e5;
    color: #fe8524;
  }
  .activity .activity_content article.level_class .box_class .text h5 {
    background-image: url("../../images/activity/bg_tt_level.webp");
  }
  .activity .activity_content article h4 {
    width: 100%;
    font-weight: bold;
    font-size: 1.75rem;
    line-height: 22px;
    text-align: center;
    padding: 9px 10px;
    margin-bottom: 2.82486%;
  }
  .activity .activity_content article > p {
    font-weight: bold;
    font-size: 1.4rem;
    line-height: 25px;
    letter-spacing: 1px;
    margin-bottom: 4.23729%;
  }
  .activity .activity_content article > p span {
    font-weight: normal;
  }
  .activity .activity_content article small.icon {
    width: 20px;
    height: 20px;
    display: inline-block;
    font-weight: bold;
    font-size: 1rem;
    line-height: 20px;
    color: #fff;
    text-align: center;
    -moz-border-radius: 20px;
    border-radius: 20px;
  }
  .activity .activity_content article small.icon.new {
    background: #ff4c4c;
  }
  .activity .activity_content article small.icon.new + a {
    color: #000;
  }
  .activity .activity_content article small.icon.flag {
    background: #db71f2;
  }
  .activity .activity_content article small.icon.three {
    background: #6dcc16;
  }
  .activity .activity_content article small.icon.autumn {
    background: #4cadff;
  }
  .activity .activity_content article small.icon.autumn + a {
    color: #000;
  }
  .activity .activity_content article .annot {
    margin-top: 20px;
  }
  .activity .activity_content article .annot p {
    font-weight: bold;
    color: #333;
  }
  .activity .activity_content article .departure {
    background: #f2f2f2;
    -moz-border-radius: 6px;
    border-radius: 6px;
    padding: 10px 10px 5px;
    margin: 30px 0;
  }
  .activity .activity_content article .departure p {
    border-bottom: 1px solid #000;
    display: block;
    font-style: normal;
    font-weight: bold;
    font-size: 1.4rem;
    line-height: 20px;
    margin: 0 0 10px;
  }
  .activity .activity_content article .departure ul {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .activity .activity_content article .departure ul li {
    width: -webkit-calc(50% - 10px);
    width: -moz-calc(50% - 10px);
    width: calc(50% - 10px);
    margin-bottom: 10px;
  }
  .activity .activity_content article .departure ul li:nth-child(2n+1) {
    width: -webkit-calc(50% + 10px);
    width: -moz-calc(50% + 10px);
    width: calc(50% + 10px);
  }
  .activity .activity_content article .departure ul li .station {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    color: #000;
  }
  .activity .activity_content article .departure ul li small {
    margin-right: 6px;
  }
  .activity .activity_content article .departure ul li span {
    display: block;
    font-weight: bold;
    font-size: 1.3rem;
    line-height: 18px;
  }
  .activity .activity_content article .block {
    position: relative;
    border: 1px solid #e5e5e5;
    margin-bottom: 4.23729%;
  }
  .activity .activity_content article .block:last-of-type {
    margin-bottom: 0;
  }
  .activity .activity_content article .block .number {
    width: 75px;
    height: 64px;
    display: block;
    font-weight: bold;
    font-size: 1.5rem;
    line-height: 20px;
    color: #fff;
    letter-spacing: 5px;
    padding-top: 3px;
    text-align: center;
    position: absolute;
    top: -1px;
    left: 15px;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    -moz-background-size: contain !important;
    background-size: contain !important;
  }
  .activity .activity_content article .block .number i {
    font-style: normal;
    font-family: "Roboto", sans-serif;
    font-weight: bold;
    font-size: 2.3em;
    line-height: 20px;
    display: block;
    margin-top: 3px;
  }
  .activity .activity_content article .block .text {
    padding: 0 15px 15px;
  }
  .activity .activity_content article .block .text .title figure {
    margin: -1px -16px 10px;
    min-height: 130px;
  }
  .activity .activity_content article .block .text .title h5 {
    font-weight: bold;
    font-size: 1.8rem;
    line-height: 25px;
    border-bottom: 3px solid #000;
    margin-bottom: 18px;
    -webkit-box-ordinal-group: 2;
    -moz-box-ordinal-group: 2;
    -ms-flex-order: 1;
    order: 1;
  }
  .activity .activity_content article .block .text .title h5 span {
    display: block;
    font-weight: 400;
    font-size: 1.4rem;
    line-height: 20px;
    margin-bottom: 7px;
  }
  .activity .activity_content article .block .text p {
    font-size: 1.4rem;
    line-height: 22px;
    margin: 15px 0 15px;
  }
  .activity .activity_content article .block .text p .text_bold {
    font-weight: bold;
  }
  .activity .activity_content article .block dl {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    border-top: 1px solid #e5e5e5;
    font-size: 1.4rem;
    line-height: 22px;
  }
  .activity .activity_content article .block dl dt {
    width: 85px;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -moz-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    border-right: 1px solid #e5e5e5;
    font-weight: bold;
  }
  .activity .activity_content article .block dl dd {
    width: -webkit-calc(100% - 85px);
    width: -moz-calc(100% - 85px);
    width: calc(100% - 85px);
    padding: 10px 15px 10px 10px;
  }
  .activity .activity_content article .block dl dd ul.date li {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    margin-bottom: 5px;
  }
  .activity .activity_content article .block dl dd ul.date li small {
    margin-left: 4px;
  }
  .activity .activity_content article .block dl dd p small {
    margin: 0 4px;
  }
  .activity .activity_content article .block dl dd label {
    display: inline-block;
    min-width: 145px;
    height: 25px;
    font-weight: bold;
    font-size: 1.3rem;
    line-height: 25px;
    color: #fff;
    text-align: center;
    padding: 0 10px;
    margin: 15px 0 10px;
  }
  .activity .activity_content article .block dl dd label.primary {
    background: #fe8524;
  }
  .activity .activity_content article .block dl dd label.middle {
    background: #f978bb;
  }
  .activity .activity_content article .block dl dd label.advance {
    background: #03a744;
  }
  .activity .activity_content .special {
    margin-top: 7.06215%;
  }
  .activity .activity_content .special article .block dl:nth-of-type(3) dd {
    padding-top: 10px;
    padding-bottom: 10px;
  }
  .activity .activity_content .special article .block dl dt {
    background: #fef5f5;
    color: #fc3b3b;
  }
  .activity .report_main .activities {
    margin-bottom: 8.47458%;
  }
  .activity .report_main .activities > p {
    font-weight: bold;
    font-size: 1.4rem;
    line-height: 22px;
    margin-bottom: 4.23729%;
  }
  .activity .report_main .activities .info {
    border: 1px solid #e5e5e5;
  }
  .activity .report_main .activities .info .warning {
    padding: 15px;
    background: #fcff00;
    text-align: center;
  }
  .activity .report_main .activities .info .warning small {
    display: block;
    font-size: 1.4rem;
    line-height: 20px;
    margin-bottom: 10px;
  }
  .activity .report_main .activities .info .warning small::before {
    content: "";
    display: block;
    width: 34px;
    height: 34px;
    background: url("../images/icon_warning.webp") no-repeat;
    margin: 0 auto 10px;
  }
  .activity .report_main .activities .info .warning em {
    display: block;
    font-style: normal;
    font-weight: bold;
    font-size: 2rem;
    line-height: 24px;
  }
  .activity .report_main .activities .info p {
    font-size: 1.4rem;
    line-height: 24px;
    padding: 15px;
  }
  .activity .report_main article {
    margin-bottom: 11.29944%;
  }
  .activity .report_main article.level_class {
    margin: 54px 0 0;
  }
  .activity .report_main article h4 {
    margin-bottom: 7.06215%;
  }
  .activity .report_main .box_class {
    width: 100%;
    margin-bottom: 8.47458%;
  }
  .activity .report_main .box_class:last-of-type {
    margin-bottom: 0;
  }
  .activity .report_main .box_class .text h5 {
    width: 90%;
    height: 34px;
    font-weight: bold;
    font-size: 1.5rem;
    line-height: 34px;
    color: #fff;
    position: relative;
    padding: 0 15px;
    margin-bottom: 2.11864%;
  }
  .activity .report_main .box_class .text h5::after {
    content: "";
    border-top: 17px solid transparent;
    border-bottom: 17px solid transparent;
    border-right: 9px solid #fff;
    position: absolute;
    top: 0;
    right: 0;
  }
  .activity .report_main .box_class .text h5 span {
    font-size: 1.2rem;
  }
  .activity .report_main .box_class .text span {
    font-size: 1.4rem;
    font-weight: bold;
  }
  .activity .report_main .box_class .text p {
    font-size: 1.4rem;
    line-height: 22px;
  }
  .activity .report_main .box_class figure {
    width: 42.37288%;
    margin: 2.82486% auto;
    text-align: center;
  }
  .archive ul {
    margin: 20px 0;
  }
  .archive li {
    padding: 8px 0;
    border-bottom: 1px dotted #ccc;
  }
  .archive li:last-child {
    border-bottom: none;
  }
  .archive a {
    color: #000;
    font-size: 1.6rem;
  }
  .archive a::before {
    content: ">";
    color: #03a744;
    margin-right: 10px;
  }
  .rtn_btn {
    text-align: center;
  }
  .rtn_btn p {
    width: 70%;
    text-align: center;
    font-size: 1.4rem;
    position: relative;
    display: inline-block;
  }
  .rtn_btn a {
    display: block;
    background: #03a744;
    color: #fff;
    -moz-border-radius: 7px;
    border-radius: 7px;
    padding: 10px 0;
  }
  .rtn_btn a:hover {
    color: #fff;
  }
  .rtn_btn a::after {
    content: ">";
    position: absolute;
    right: 15px;
  }
  /* 過去のレポートアーカイブページのスタイル崩れ対策 */
  .post-type-archive-report a {
    font-size: 1.4rem;
  }
  .post-type-archive-report a::before, .post-type-archive-report a::after {
    content: none;
  }
  .post-type-archive-report a ul {
    margin: 0;
  }
  .post-type-archive-report a li {
    padding: 0;
    border-bottom: none;
  }
}