@charset "UTF-8";

/* ------------------------------------------------
 * utility
 * ----------------------------------------------- */

/* basic_section */

.basic_section {
    margin-top: 30px;
    padding-top: 40px;
    background: url(../img/decoration_big_cutting.svg) 0 0 no-repeat;
    background-size: 100% 32px;
}

/* .basic_section > .section_title */

.basic_section .section_title {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Noto Sans JP';
    font-size: 2.0rem;
    line-height: 1.25;
    padding: 0 10px;
}

.basic_section .section_title::before,
.basic_section .section_title::after {
    content: '';
    flex: 0 0 auto;
    width: 40px;
    height: 21px;
    background: url(../img/decoration_ripple.svg) 0 0 no-repeat;
    background-size: contain;
}

.basic_section .section_title::before {
    margin-right: 10px;
}

.basic_section .section_title::after {
    margin-left: 10px;
    transform: rotateZ(-180deg);
}

.basic_section .section_body {
    margin-top: 20px;
    padding: 0 10px;
}

/* middle_section */

.middle_section {
    margin-top: 40px;
}

/* small_section */

.small_section {
    margin-bottom: 30px;
}

/* .middle_title_1 */

.middle_title_1 {
    display: flex;
    align-items: center;
    margin-bottom: 3px;
	margin-top: -40px;
	padding-top: 40px;
    font-size: 1.8rem;
    color: #002D5E;
}

.middle_title_1::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    margin-right: 3px;
    background: url(../img/decoration_ling_1.svg) 0 0 no-repeat;
    background-size: contain;
}

/* .middle_title_2 */

.middle_title_2 {
    display: flex;
    align-items: center;
    padding-bottom: 5px;
    font-size: 1.8rem;
    color: #002D5E;
    background: url(../img/decoration_big_underline.svg) 0 100% no-repeat;
    background-size: 100% 2px;
}

.middle_title_2::before {
    content: '';
    display: inline-block;
    width: 25px;
    height: 28px;
    margin-right: 5px;
    background: url(../img/decoration_ling_2.svg) 0 0 no-repeat;
    background-size: contain;
}

.middle_title_2 .sub {
    font-size: 1.4rem;
    font-weight: normal;
}

/* middle_title_3 */

.middle_title_3 {
    display: flex;
    align-items: center;
    padding-bottom: 5px;
    font-size: 1.8rem;
    font-weight: bold;
    color: #002D5E;
    background: url(../img/decoration_big_underline.svg) 0 100% no-repeat;
    background-size: 100% 2px;
}

/* .small_title_1 */

.small_title_1 {
    font-size: 1.6rem;
    color: #002D5E;
    margin-bottom: 10px;
}

/* .address_box */

.address_box {
    border: solid 1px #DDDDDD;
    padding: 5px 10px;
}



/* ------------------------------------------------
 * basement
 * ----------------------------------------------- */

.wrapper {
}


.page_main {
}



/* ------------------------------------------------
 * .page_header
 * ----------------------------------------------- */

.page_header {
}

.page_header .header_bar {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
	justify-content: space-between;
    width: 100%;
    border-bottom: solid 1px #D9D9D9;
    height: 80px;
    padding: 0 10px;
    background-color: #fff;
}

.page_header .header_bar .site_title {
    width: 160px;
    /*height: 68px;*/
    text-indent: -9999px;
    background: url(../img/site_title-sp_1.svg) 0 0 no-repeat;
    background-size: contain;
}

.page_header .header_bar .box {
    display: flex;
	align-self: center;
	align-items: center;
}

.page_header .header_bar .inner {
	margin-right: 15px;
}

.page_header .header_bar .contents_btn {
	margin-bottom: 2px;
	text-align: right;
	font-size: 1.4rem;
}

.page_header .header_bar .contents_btn a {
	display: inline-block;
	padding-left: 18px;
    background: url("../img/icon_arrow_01.svg") 0 6px no-repeat;
	background-size: 12px 12px;
}

.page_header .header_bar .font_size_changer {
    display: none;
}

.page_header .header_bar .en_link {
    font-size: 1.4rem;
}

.page_header .header_bar .menu_btn a {
    display: block;
    width: 50px;
    height: 62px;
    text-indent: -9999px;
    background: url(../img/menu_btn_1-open.svg) 0 0 no-repeat;
    background-size: contain;
}

/* .header_bar-menu_open */

html.header_bar-menu_open,
html.header_bar-menu_open body {
    overflow-y: hidden;
    touch-action: none;
}

html.header_bar-menu_open .page_header .header_bar .menu_btn a {
    background-image: url(../img/menu_btn_1-close.svg);
}

/* .header_bar-follow_mode */

html.header_bar-follow_mode .page_header {
    padding-top: 80px;
}

html.header_bar-follow_mode .page_header .header_bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 40px;
}

html.header_bar-follow_mode .page_header .header_bar .site_title {
    width: 250px;
    height: 33px;
    background-image: url(../img/site_title-sp_2.svg);
}

html.header_bar-follow_mode .page_header .header_bar .contents_btn {
    display: none;
}

html.header_bar-follow_mode .page_header .header_bar .en_link {
    display: none;
}

html.header_bar-follow_mode .page_header .header_bar .menu_btn {
    margin-left: auto;
}

html.header_bar-follow_mode .page_header .header_bar .menu_btn a {
    width: 36px;
    height: 36px;
    background-image: url(../img/menu_btn_2-open.svg);
}

html.header_bar-follow_mode.header_bar-menu_open .page_header .header_bar .menu_btn a {
    background-image: url(../img/menu_btn_2-close.svg);
}

.page_header .site_description {
    font-size: 1.6rem;
    color: #444444;
    padding: 10px;
}



/* ------------------------------------------------
 * .page_sub
 * ----------------------------------------------- */

.page_sub {
    position: absolute;
    top: 0;
    left: 0;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    padding-top: 80px;
    display: none;
}

.page_sub,
.page_sub a {
    color: #fff;
}

.page_sub .page_sub_inner {
    box-sizing: border-box;
    height: 100%;
    padding-top: 13px;
    padding-bottom: 25px;
    background-color: #002D5E;
    overflow-y: auto;
}

.page_sub .page_navigation {
}

.page_sub .page_navigation ul {
}

.page_sub .page_navigation ul li {
    display: flex;
    position: relative;
    align-items: center;
    padding-left: 20px;
}

.page_sub .page_navigation ul li::before {
    content: '';
    flex: 0 0 auto;
    display: block;
    position: relative;
    z-index: 1;
    width: 9px;
    height: 9px;
    background: #3E477F;
    border-radius: 100%;
}

.page_sub .page_navigation ul li::after {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    left: 23px;
    width: 1px;
    height: 100%;
    background: #3E477F;
    transform: translateX(50%);
}

.page_sub .page_navigation ul li:first-child::after,
.page_sub .page_navigation ul li:last-child::after {
    height: 50%;
}

.page_sub .page_navigation ul li:first-child::after {
    top: 50%;
}

.page_sub .page_navigation ul li a {
    display: flex;
    align-items: center;
    position: relative;
    text-decoration: none;
    width: 100%;
    padding: 8px 0;
    margin-left: 15px;
    font-size: 1.5rem;
}

.page_sub .page_navigation ul li.active {
}

.page_sub .page_navigation ul li.active::before {
    background-color: #fff;
}

.page_sub .page_navigation ul li.active a {
    background-color: #1760A0;
    padding-left: 5px;
}

.page_sub .page_navigation ul li.active a::before {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    left: -15px;
    background: url(../img/icon_triangle.svg) 0 0 no-repeat;
    background-size: 100% 100%;
    width: 15px;
    height: 100%;
}

.page_sub .sub_navigation {
}

.page_sub .sub_navigation p {
	margin: 15px 10px 0;
	padding: 10px 10px 2px;
	border-top: solid 1px #3E477F;
}

.page_sub .sub_navigation ul {
	margin: 0 10px 20px;
	padding: 0 0 10px;
	/*border-top: solid 1px #3E477F;*/
	border-bottom: solid 1px #3E477F;
}

.page_sub .sub_navigation ul li {
    display: flex;
    position: relative;
    align-items: center;
    padding-left: 10px;
}

.page_sub .sub_navigation ul li::before {
    content: '';
    flex: 0 0 auto;
    display: block;
    position: relative;
    z-index: 1;
    width: 9px;
    height: 9px;
    background: #3E477F;
    border-radius: 100%;
}

.page_sub .sub_navigation ul li::after {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    left: 13px;
    width: 1px;
    height: 100%;
    background: #3E477F;
    transform: translateX(50%);
}

.page_sub .sub_navigation ul li:first-child::after,
.page_sub .sub_navigation ul li:last-child::after {
    height: 50%;
}

.page_sub .sub_navigation ul li:first-child::after {
    top: 50%;
}

.page_sub .sub_navigation ul li a {
    display: flex;
    align-items: center;
    position: relative;
    text-decoration: none;
    width: 100%;
    padding: 8px 0;
    margin-left: 15px;
    font-size: 1.5rem;
}

.page_sub .sub_navigation ul li a::after {
    content: '';
    display: inline-block;
    width: 15px;
    height: 15px;
    background-image: url(../img/link_icon-external_white.svg);
    background-position: 0 50%;
    background-repeat: no-repeat;
	margin-top: -4px;
    margin-left: 6px;
}

.page_sub .event_banner {
    margin-top: 21px;
    padding: 0 20px;
    text-align: center;
}

.page_sub .riken_logo {
    margin-top: 21px;
    padding: 0 20px;
}

/* .header_bar-follow_mode */

html.header_bar-follow_mode .page_sub {
    position: fixed;
    padding-top: 40px;
}

html.header_bar-menu_open .page_sub {
    display: block;
}



/* ------------------------------------------------
 * .page_footer
 * ----------------------------------------------- */

.page_footer {
    background-color: #F2F2F2;
    padding: 5px 0;
    margin-top: 40px;
}

.page_footer .copyright {
    font-size: 1.2rem;
    text-align: center;
}



/* ------------------------------------------------
 * .top_banner_section
 * ----------------------------------------------- */

.top_banner_section {
    padding: 10px 20px;
    background: url(../img/bg_cubism_blue.svg) 50% 50% no-repeat;
    background-size: cover;
    text-align: center;
}

.top_banner_section a {
}

.top_banner_section a img {
}



/* ------------------------------------------------
 * .summary_link_section
 * ----------------------------------------------- */

.summary_link_section {
}

.summary_link_section .block {
    padding: 10px;
}

.summary_link_section .block > a {
	display: block;
	text-decoration: none;
}

.summary_link_section .block:last-child { padding-bottom: 0; } 

.summary_link_section .block_inner {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.summary_link_section .title {
    text-indent: -9999px;
    background-position: 50% 50%;
    background-repeat: no-repeat;
    background-size: cover;
    width: 100%;
    height: 0;
    padding-top: 29.411%;
}

.summary_link_section .block.spring8 .title { background-image: url(../img/summury_visual_spring8-sp.jpg); }
.summary_link_section .block.sacla .title { background-image: url(../img/summury_visual_sacla-sp.jpg); }
.summary_link_section .block.rsc .title { background-image: url(../img/summury_visual_rsc-sp.jpg); }

.summary_link_section .content {
    padding: 10px 10px 10px;
    border-top: solid 1px #DBEDF0;
    background: #EFF8FA;
    color: #333;
}

.summary_link_section .block .content .title_pc {
	display: block;
	text-align: center;
	margin-bottom: 2px;
}

.summary_link_section .block .content .title_pc .sub {
	font-size: 1.6rem;
	font-weight: bold;
	margin-right: 0.6rem;
}

.summary_link_section .block .content .title_pc .main {
	font-size: 2.0rem;
	font-weight: bold;
}

.summary_link_section .block .content .title_pc .main::after {
	content: '';
	display: inline-block;
	width: 15px;
	height: 15px;
	background-image: url("../img/link_icon-external_gray.svg");
	background-position: 0 50%;
	background-repeat: no-repeat;
	margin-left: 8px;
}



/* ------------------------------------------------
 * .middle_banner_section
 * ----------------------------------------------- */

.middle_banner_section {
    margin-top: 20px;
    padding: 0 10px;
    text-align: center;
}



/* ------------------------------------------------
 * .news_section
 * ----------------------------------------------- */

.news_section {
}

/* .news_viewer */

.news_viewer {
}

/* .news_viewer > .date_controller */

.news_viewer .date_controller {
}

/* .news_viewer > .date_controller > .iterate_navigation */

.news_viewer .date_controller .iterate_navigation {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.news_viewer .date_controller .iterate_navigation .current_text {
    margin: 0 55px;
    padding-top: 10px;
    font-size: 3.2rem;
    line-height: 1;
    color: #002D5E;
}

.news_viewer .date_controller .iterate_navigation .next_link,
.news_viewer .date_controller .iterate_navigation .prev_link {
    font-size: 1.5rem;
    line-height: 1;
    color: #002D5E;
    text-decoration: underline;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.news_viewer .date_controller .iterate_navigation .next_link::before,
.news_viewer .date_controller .iterate_navigation .prev_link::before {
    content: '';
    display: block;
    width: 38px;
    height: 50px;
    background-image: url(../img/icon_big_arrow_on.svg);
    background-position: 50% 50%;
    background-repeat: no-repeat;
}

.news_viewer .date_controller .iterate_navigation .next_link::before { transform: rotateZ(0deg); }
.news_viewer .date_controller .iterate_navigation .prev_link::before { transform: rotateZ(-180deg); }

.news_viewer .date_controller .iterate_navigation .next_link.disabled,
.news_viewer .date_controller .iterate_navigation .prev_link.disabled {
    color: transparent;
    pointer-events: none;
}

.news_viewer .date_controller .iterate_navigation .next_link.disabled::before,
.news_viewer .date_controller .iterate_navigation .prev_link.disabled::before {
    background-image: url(../img/icon_big_arrow_off.svg);
}

.news_viewer .date_controller .iterate_navigation .next_link {
}

.news_viewer .date_controller .iterate_navigation .prev_link {
}

/* .news_viewer > .date_controller > .backnumber_navigation */

.news_viewer .date_controller .backnumber_navigation {
    margin-top: -11px;
}

.news_viewer .date_controller .backnumber_navigation .toggle_link_holder {
    text-align: center;
}

.news_viewer .date_controller .backnumber_navigation .toggle_link_holder .toggle_link {
    display: inline-block;
    margin: 0 auto;
    font-size: 1.5rem;
    color: #002D5E;
}

.news_viewer .date_controller .backnumber_navigation .toggle_link_holder .toggle_link span {
    text-decoration: underline;
}

.news_viewer .date_controller .backnumber_navigation .toggle_link_holder .toggle_link::after {
    content: '';
    display: block;
    width: 14px;
    height: 9px;
    margin: 4px auto 0;
    background: url(../img/icon_small_arrow.svg) 0 0 no-repeat;
    transform: rotateZ(-180deg);
}

.news_viewer .date_controller .backnumber_navigation .year_link_box {
    padding: 15px;
    padding-bottom: 10px;
    background-color: #F2F2F2;
    border-radius: 5px;
    display: flex;
    flex-wrap: wrap;
    margin-top: 10px;
}

.news_viewer .date_controller .backnumber_navigation .year_link_box .year_link {
    /*flex: 0 0 calc(100% / 5);*/
	width: 25%;
    box-sizing: border-box;
    padding: 0 5px;
    margin-bottom: 5px;
    text-align: center;
    font-size: 1.5rem;
    text-decoration: underline;
    color: #444444;
}

.news_viewer .date_controller .backnumber_navigation:not(.open) .toggle_link_holder .toggle_link::after {
    transform: rotateZ(0deg);
}

.news_viewer .date_controller .backnumber_navigation:not(.open) .year_link_box {
    display: none;
}

/* .news_viewer > .category_controller */

.news_viewer .category_controller {
    margin-top: 20px;
    display: flex;
    align-items: center;
}

.news_viewer .category_controller .select_all_link {
    font-size: 1.4rem;
    color: #003994;
    text-decoration: underline;
    margin-right: 10px;
}

.news_viewer .category_controller .category_link_area {
    display: flex;
    align-items: stretch;
}

.news_viewer .category_controller .category_link_area .category_link {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #333333;
    border-radius: 3px;
    line-height: 1.23;
    background-color: #fff;
    border: solid 1px #ccc;
    margin-right: 5px;
    padding: 5px;
}

.news_viewer .category_controller .category_link_area .category_link::before {
    content: '';
    background: url(../img/icon_check_off.svg) 50% 50% no-repeat;
    width: 12px;
    height: 8px;
    margin-right: 5px;
}

.news_viewer .category_controller .category_link_area .category_link.checked {
    background-color: #002D5E;
    color: #fff;
    border-color: #002D5E;
}

.news_viewer .category_controller .category_link_area .category_link.checked::before {
    background-image: url(../img/icon_check_on.svg);
}

.news_viewer .category_controller .category_link_area .category_link:last-child { margin-right: 0; }

/* .news_viewer > .news_box */

.news_viewer .news_box {
    margin-top: 15px;
    border: solid 1px #DDDDDD;
    padding: 10px 10px;
    height: 390px;
    overflow-y: auto;
}

/* .news_viewer > .news_box > .news_list */

.news_viewer .news_box .news_list {
    position: relative;
    height: 100%;
}

.news_viewer .news_box .news_list.empty::before {
    content: '該当する最新情報・お知らせはありません。';
    text-align: center;
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    color: #9e9e9e;
    font-size: 1.7rem;
}


/* .news_viewer > .news_box > .news_list > .news */

.news_viewer .news_box .news_list .news {
    border-bottom: solid 1px #DDDDDD;
    padding-bottom: 5px;
    margin-bottom: 10px;
}

.news_viewer .news_box .news_list .news.disabled {
    display: none;
}

.news_viewer .news_box .news_list .news:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

.news_viewer .news_box .news_list .news .data {
    display: flex;
    align-items: center;
}

.news_viewer .news_box .news_list .news .data .category {
    background-color: #F2F2F2;
    font-size: 1.2rem;
    line-height: 1;
    box-sizing: border-box;
    width: 96px;
    padding: 4px 5px;
    text-align: center;
}

.news_viewer .news_box .news_list .news .data .category.press { background-color: #DDF5F5; }
.news_viewer .news_box .news_list .news .data .category.event { background-color: #F7F7CB; }
.news_viewer .news_box .news_list .news .data .category.research { background-color: #FFE5EC; }
.news_viewer .news_box .news_list .news .data .category.info { background-color: #F2F2F2;  }

.news_viewer .news_box .news_list .news .data .date {
    font-size: 1.4rem;
	text-align: center;
    margin-left: 10px;
}

.news_viewer .news_box .news_list .news .content {
    margin-top: 5px;
}

.news_viewer .news_box .news_list .news .content .link {
    word-break: break-all;
}

.news_viewer .news_box .news_list .news .content .link.image::after,
.news_viewer .news_box .news_list .news .content .link.audio::after,
.news_viewer .news_box .news_list .news .content .link.movie::after,
.news_viewer .news_box .news_list .news .content .link.pdf::after,
.news_viewer .news_box .news_list .news .content .link.mail::after,
.news_viewer .news_box .news_list .news .content .link.zip::after,
.news_viewer .news_box .news_list .news .content .link.file::after,
.news_viewer .news_box .news_list .news .content .link.attachment::after,
.news_viewer .news_box .news_list .news .content .link.exe::after,
.news_viewer .news_box .news_list .news .content .link.ms_excel::after,
.news_viewer .news_box .news_list .news .content .link.ms_onenote::after,
.news_viewer .news_box .news_list .news .content .link.ms_outlook::after,
.news_viewer .news_box .news_list .news .content .link.ms_powerpoint::after,
.news_viewer .news_box .news_list .news .content .link.ms_sharepoint::after,
.news_viewer .news_box .news_list .news .content .link.ms_teams::after,
.news_viewer .news_box .news_list .news .content .link.ms_word::after,
.news_viewer .news_box .news_list .news .content .link.ms_yammer::after,
.news_viewer .news_box .news_list .news .content .link.external::after {
    content: '';
    display: inline-block;
    width: 18px;
    height: 23px;
    background-position: 0 50%;
    background-repeat: no-repeat;
    vertical-align: top;
    margin-left: 5px;
}

.news_viewer .news_box .news_list .news .content .link.image::after { background-image: url(../img/link_icon-image.svg); }
.news_viewer .news_box .news_list .news .content .link.audio::after { background-image: url(../img/link_icon-audio.svg); }
.news_viewer .news_box .news_list .news .content .link.movie::after { background-image: url(../img/link_icon-movie.svg); }
.news_viewer .news_box .news_list .news .content .link.pdf::after { background-image: url(../img/link_icon-pdf.svg); }
.news_viewer .news_box .news_list .news .content .link.mail::after { background-image: url(../img/link_icon-mail.svg); }
.news_viewer .news_box .news_list .news .content .link.zip::after { background-image: url(../img/link_icon-zip.svg); }
.news_viewer .news_box .news_list .news .content .link.file::after { background-image: url(../img/link_icon-file.svg); }
.news_viewer .news_box .news_list .news .content .link.attachment::after { background-image: url(../img/link_icon-attachment.svg); }
.news_viewer .news_box .news_list .news .content .link.exe::after { background-image: url(../img/link_icon-exe.svg); }
.news_viewer .news_box .news_list .news .content .link.ms_excel::after { background-image: url(../img/link_icon-ms_excel.svg); }
.news_viewer .news_box .news_list .news .content .link.ms_onenote::after { background-image: url(../img/link_icon-ms_onenote.svg); }
.news_viewer .news_box .news_list .news .content .link.ms_outlook::after { background-image: url(../img/link_icon-ms_outlook.svg); }
.news_viewer .news_box .news_list .news .content .link.ms_powerpoint::after { background-image: url(../img/link_icon-ms_powerpoint.svg); }
.news_viewer .news_box .news_list .news .content .link.ms_sharepoint::after { background-image: url(../img/link_icon-ms_sharepoint.svg); }
.news_viewer .news_box .news_list .news .content .link.ms_teams::after { background-image: url(../img/link_icon-ms_teams.svg); }
.news_viewer .news_box .news_list .news .content .link.ms_word::after { background-image: url(../img/link_icon-ms_word.svg); }
.news_viewer .news_box .news_list .news .content .link.ms_yammer::after { background-image: url(../img/link_icon-ms_yammer.svg); }
.news_viewer .news_box .news_list .news .content .link.external::after { background-image: url(../img/link_icon-external.svg); }



/* ------------------------------------------------
 * .about_section
 * ----------------------------------------------- */

.about_section {
}

.about_section .shortcut_links {
    margin-top: 20px;
	text-align: center;
}

.about_section .shortcut_links .link {
}

.about_section .shortcut_links .sep {
    margin: 0 10px;
}

/* .middle_section_kyoten */

.lead_text_kyoten {
	padding-top: 40px;
	margin-top: 0;
}

.about_section .middle_section_kyoten .figure .img {
    width: 100%;
    border: solid 1px #555555;
}

.about_section .middle_section_kyoten .kyoten_list {
    margin-top: 15px;
}

.about_section .middle_section_kyoten .kyoten_list .kyoten {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 10px;
}

.about_section .middle_section_kyoten .kyoten_list .kyoten:first-child { margin-top: 0; }

.about_section .middle_section_kyoten .kyoten_list .kyoten .name {
    font-size: 1.6rem;
    color: #002D5E;
    font-weight: bold;
    margin-right: 5px;
}

.about_section .middle_section_kyoten .kyoten_list .kyoten .link {
    color: #555555;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
}

.about_section .middle_section_kyoten .kyoten_list .kyoten .link::after {
    content: '';
    display: inline-block;
    width: 15px;
    height: 15px;
    background-image: url(../img/link_icon-external_gray.svg);
    background-position: 0 50%;
    background-repeat: no-repeat;
    margin-left: 5px;
}

/* .middle_seciton_gaiyou */

.about_section .middle_seciton_soshikizu .picture .img {
    width: 100%;
}

.about_section .middle_seciton_gaiyou .description {
    margin-top: 20px;
}


/* .middle_seciton_soshikizu */

.about_section .middle_seciton_soshikizu .figure .img {
    width: 100%;
    border: solid 1px #CCCCCC;
}

.about_section .middle_seciton_soshikizu .description {
    margin-top: 20px;
}

/* .middle_section_enkaku */

.about_section .middle_section_enkaku .enkaku_box {
    overflow-y: auto;
    max-height: 420px;
    padding: 15px 10px;
    border: solid 1px #1760A0;
}

.about_section .middle_section_enkaku .enkaku_box .enkaku_list {
}

.about_section .middle_section_enkaku .enkaku_box .enkaku_list .enkaku {
    display: flex;
    padding: 10px 5px 10px 3px;
    border-bottom: solid 1px #CCCCCC;
}

.about_section .middle_section_enkaku .enkaku_box .enkaku_list .enkaku:first-child {
    padding-top: 0;
}

.about_section .middle_section_enkaku .enkaku_box .enkaku_list .enkaku:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.about_section .middle_section_enkaku .enkaku_box .enkaku_list .enkaku .date {
    margin-right: 15px;
    font-size: 1.4rem;
    color: #555555;
}

.about_section .middle_section_enkaku .enkaku_box .enkaku_list .enkaku .text {
	flex: 1;
}

/* middle_section_column */

.about_section .middle_section_column {
}

.about_section .middle_section_column .column_title {
    text-indent: -9999px;
    width: 143px;
    height: 60px;
    margin: 0 auto;
    background: url(../img/column_title.svg) 0 0 no-repeat;
    background-size: contain;
}

.about_section .middle_section_column .columns {
    margin-top: 20px;
}

.about_section .middle_section_column .columns .column {
    position: relative;
    margin-top: 30px;
    padding: 10px 10px;
    background: #EFF8FA;
    border-top: solid 1px #002D5E;
    border-bottom: solid 1px #002D5E;
}

.about_section .middle_section_column .columns .column:first-child {
    margin-top: 0;
}

.about_section .middle_section_column .columns .column .title {
    font-size: 1.7rem;
    color: #002D5E;
}

.about_section .middle_section_column .columns .column .toggle_btn {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 10px;
    right: 10px;
    min-width: 100px;
    padding: 5px 10px;
    background: #002D5E;
    color: #fff;
    font-size: 1.2rem;
    border-radius: 5px;
	text-decoration: none;
}

.about_section .middle_section_column .columns .column .toggle_btn::after {
    content: '';
    display: inline-block;
    width: 12px;
    height: 7px;
    margin-left: 5px;
    background: url(../img/icon_small_arrow_white.svg) 0 0 no-repeat;
    background-size: contain;
    transform: rotateZ(-180deg);
}

.about_section .middle_section_column .columns .column .toggle_btn .msg_closed {
    display: none;
}

.about_section .middle_section_column .columns .column .toggle_btn .msg_opened {
    display: inline;
}

.about_section .middle_section_column .columns .column .description {
    margin-top: 20px;
    padding-bottom: 10px;
}

.about_section .middle_section_column .columns .column .description .figure,
.about_section .middle_section_column .columns .column .description .text,
.about_section .middle_section_column .columns .column .description .annotation {
    margin-top: 20px;
}

.about_section .middle_section_column .columns .column .description .figure:first-child,
.about_section .middle_section_column .columns .column .description .text:first-child,
.about_section .middle_section_column .columns .column .description .annotation:first-child {
    margin-top: 0;
}

.about_section .middle_section_column .columns .column .description .figure .img {
    width: 100%;
    border: solid 1px #CCCCCC;
}

.about_section .middle_section_column .columns .column .description .annotation {
    font-size: 1.3rem;
}

/* .column:not(.open) */

.about_section .middle_section_column .columns .column:not(.open) {
    display: flex;
    align-items: center;
}

.about_section .middle_section_column .columns .column:not(.open) .title {
    flex: 0 0 auto;
    order: 1;
	margin-top: -60px;
	padding-top: 60px;
}

.about_section .middle_section_column .columns .column:not(.open) .toggle_btn {
    flex: 0 0 auto;
    order: 3;
    position: static;
    margin-left: auto;
}

.about_section .middle_section_column .columns .column:not(.open) .toggle_btn::after {
    transform: rotateZ(0deg);
}

.about_section .middle_section_column .columns .column:not(.open) .toggle_btn .msg_closed {
    display: inline;
}

.about_section .middle_section_column .columns .column:not(.open) .toggle_btn .msg_opened {
    display: none;
}

.about_section .middle_section_column .columns .column:not(.open) .description {
    flex: 1 1 auto;
    order: 2;
    margin-top: 0;
    margin-left: 10px;
    margin-right: 10px;
    padding-bottom: 0;
    height: calc(1.5rem * 1.75);
    width: 0px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.about_section .middle_section_column .columns .column:not(.open) .description .figure,
.about_section .middle_section_column .columns .column:not(.open) .description .text,
.about_section .middle_section_column .columns .column:not(.open) .description .annotation {
    margin-top: 0;
    display: inline;
}

.about_section .middle_section_column .columns .column:not(.open) .description .figure {
    display: none;
}

.about_section .middle_section_column .columns .column:not(.open) .description { display: none; } /* スマホは非表示 */



/* ------------------------------------------------
 * .event_section
 * ----------------------------------------------- */

.event_section {
}

.event_section .catch_text {
    font-size: 1.8rem;
    line-height: 1.27;
    font-family: 'Noto Sans JP';
    color: #444444;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    text-align: center;
    margin-top: 20px;
}

.event_section .catch_text::before,
.event_section .catch_text::after {
    content: '';
    display: inline-block;
    width: 30px;
    height: 21px;
    background: url(../img/chatch_text_decoration.svg) 0 0 no-repeat;
    background-size: contain;
}

.event_section .catch_text::before { transform: translateX(-10px) rotateY(0deg); }
.event_section .catch_text::after  { transform: translateX(10px) rotateY(-180deg); }

/* .middle_section_tour */

.event_section .middle_section_tour {
}

.event_section .middle_section_tour .visual {
    margin-top: 20px;
    text-align: center;
}

.event_section .middle_section_tour .description {
    margin-top: 20px;
}

.event_section .middle_section_tour .apply_btn {
    margin-top: 20px;
}

.event_section .middle_section_tour .apply_btn .btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 0;
    border-radius: 22px;
    background: #002D5E;
    color: #fff;
    font-size: 1.6rem;
    font-weight: bold;
    font-family: 'Noto Sans JP';
    text-decoration: none;
    text-align: center;
}

.event_section .middle_section_tour .apply_btn .btn::after {
    content: '';
    display: inline-block;
    width: 15px;
    height: 15px;
    background-image: url(../img/link_icon-external_white.svg);
    background-position: 0 50%;
    background-repeat: no-repeat;
    margin-left: 5px;
}

.event_section .middle_section_tour .address_box {
    margin-top: 20px;
}

/* .middle_section_koukai */

.event_section .middle_section_koukai {
}

.event_section .middle_section_koukai .description {
    margin-top: 20px;
}

.event_section .middle_section_koukai .gallery {
    margin-top: 20px;
}

.event_section .middle_section_koukai .gallery .title .main {
    display: block;
    color: #002D5E;
    font-size: 1.8rem;
    font-family: 'Noto Sans JP';
    line-height: 1.25;
}

.event_section .middle_section_koukai .gallery .title .sub {
    display: block;
    font-size: 1.4rem;
    line-height: 1.25;
}

.event_section .middle_section_koukai .gallery .photo_list {
    display: flex;
    flex-wrap: wrap;
    margin: 15px 10px 0;
    justify-content: space-between;
}

.event_section .middle_section_koukai .gallery .photo_list .photo {
    margin: 5px;
    flex: 0 0 auto;
    width: calc((100% - 40px) / 4);
}

.event_section .middle_section_koukai .gallery .photo_list .photo .img {
    width: 100%;
    border-radius: 6px;
}

.event_section .middle_section_koukai .gallery .note {
    margin-top: 15px;
}

.event_section .middle_section_koukai .address_box {
    margin-top: 20px;
}

/* .middle_section_optpia */

.event_section .middle_section_optpia .description {
    margin-top: 20px;
}

.event_section .middle_section_optpia .definition {
    margin-top: 20px;
}

.event_section .middle_section_optpia .definition .name {
    font-weight: normal;
    text-align: left;
    vertical-align: top;
}

.event_section .middle_section_optpia .definition .text {
    text-indent: -1.5rem;
    padding-left: 1.5rem;
}

.event_section .middle_section_optpia .definition .text::before {
    content: '：';
}


.event_section .middle_section_optpia .address_box {
    margin-top: 20px;
}



/* ------------------------------------------------
 * .access_section
 * ----------------------------------------------- */

.access_section .description {
    margin-top: 10px;
    padding: 10px 0;
    background: url(../img/access_visual-sp.jpg) 100% 50% no-repeat;
	background-size: 160px 120px;
}

.access_section .description .campus_name {
}

.access_section .description .campus_name .laboratory {
    font-size: 1.6rem;
    line-height: 1.25;
}

.access_section .description .campus_name .branch {
    font-size: 2.2rem;
    line-height: 1.5;
}

.access_section .description .address {
    margin-top: 10px;
    font-size: 1.6rem;
    line-height: 1.4;
}

.access_section .description .visual {
    display: none;
}

.access_section .map {
    position: relative;
    margin-top: 20px;
    width: 100%;
    padding-bottom: 51.74%;
}

.access_section .map iframe {
    position: absolute;
    top: 0;
    left: 0;
}

.access_section .note {
    margin-top: 15px;
}



/* ------------------------------------------------
 * .contact_section
 * ----------------------------------------------- */

.contact_section .externals {
    margin-top: 20px;
}

.contact_section .externals .external {
    margin-top: 20px;
}

.contact_section .externals .external:first-child {
    margin-top: 0;
}

.contact_section .externals .external .banner {
}

.contact_section .externals .external .banner a {
    display: block;
}

.contact_section .externals .external .banner .img {
    width: 100%;
    border-radius: 10px;
	box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.contact_section .externals .external .note {
    margin-top: 5px;
    font-size: 1.4rem;
}

.contact_section .externals .external2 {
    margin-top: 20px;
	}

.contact_section .externals .external2:first-child {
    margin-top: 0;
}

.contact_section .externals .external2 .banner {
}

.contact_section .externals .external2 .banner a {
    display: block;
}

.contact_section .externals .external2 .banner .img2 {
    flex: 1 1 auto;
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}


.contact_section .externals .external2 .note {
    margin-top: 5px;
    font-size: 1.4rem;
}


.contact_section .enquiry_info {
    margin-top: 40px;
}

.contact_section .enquiry_info .address {
    margin-top: 20px;
}

.contact_section .enquiry_info .division {
    margin-top: 15px;
    font-size: 1.9rem;
    line-height: 1.5;
}

.contact_section .enquiry_info .phone {
    margin-top: 15px;
    font-size: 1.9rem;
    line-height: 1.5;
}



/* ------------------------------------------------
 * link
 * ----------------------------------------------- */
a.normal_link.external::after {
    content: '';
    display: inline-block;
    width: 18px;
    height: 23px;
	background-image: url(../img/link_icon-external.svg);
    background-position: 0 50%;
    background-repeat: no-repeat;
    vertical-align: text-bottom;
    margin-left: 5px;
}

a.pagetop {
	display: block;
	width: 40px;
	height: 40px;
	line-height: 20em;
	overflow: hidden;
	background: url(../img/btn_page-top.svg);
	background-size: 40px 80px;
	position: fixed;
	right: 10px;
	bottom: 20px;
}



/* ===============================================
 * desktop
 * =============================================== */

@media screen and ( min-width: 768px ){

    /* ------------------------------------------------
     * utility
     * ----------------------------------------------- */

    /* .basic_section */

    .basic_section {
        margin-top: 60px;
        padding-top: 100px;
        background-size: 100% 100px;
    }

    /* .basic_section > .section_title */

    .basic_section .section_title {
        font-size: 2.8rem;
    }

    .basic_section .section_title::before,
    .basic_section .section_title::after {
        width: 62px;
        height: 34px;
    }

    .basic_section .section_title::before { margin-right: 33px; }
    .basic_section .section_title::after { margin-left: 33px; }

    .basic_section .section_body {
        box-sizing: content-box;
        max-width: 960px;
        padding-left: 20px;
        padding-right: 20px;
        margin-top: 35px;
        margin-left: auto;
        margin-right: auto;
    }

    /* middle_section */

    .middle_section {
        margin-top: 50px;
    }

    /* small_section */

    .small_section {
        margin-bottom: 60px;
    }

    /* .middle_title_1 */

    .middle_title_1 {
        font-size: 2.2rem;
        margin-bottom: 10px;
		margin-top: 0;
		padding-top: 0;
    }

    .middle_title_1::before {
        width: 30px;
        height: 30px;
        margin-right: 5px;
    }

    /* .middle_title_2 */

    .middle_title_2 {
        font-size: 2.2rem;
        margin-bottom: 6px;
    }

    .middle_title_2::before {
        width: 33px;
        height: 37px;
        margin-right: 8px;
    }

    .middle_title_2 .sub {
        font-size: 1.8rem;
    }

    /* .middle_title_3 */

    .middle_title_3 {
        font-size: 2.2rem;
        margin-bottom: 6px;
    }

    /* .small_title_1 */

    .small_title_1 {
        font-size: 2.0rem;
    }

    /* .address_box */

    .address_box {
        padding: 20px;
    }

    /* .hover_alpha */

    .hover_alpha { cursor: pointer; }
    .hover_alpha:hover { opacity: 0.5; }



    /* ------------------------------------------------
     * basement
     * ----------------------------------------------- */

    body {
        font-size: 1.6rem;
    }

    .wrapper {
        display: flex;
    }

    .page_main {
        /*flex: 1 1 auto;*/
		width: calc(100% - 230px);
    }

    a:hover, a:active, a:not([class]):hover, a:not([class]):active { text-decoration: none; }



    /* ------------------------------------------------
     * .page_header
     * ----------------------------------------------- */

    .page_header .header_bar {
        height: auto;
        padding-top: 15px;
        padding-bottom: 15px;
        padding-left: 20px;
        padding-right: 20px;
        border-bottom: none;
    }

    .page_header .header_bar .site_title {
        width: 396px;
        height: 57px;
        background-image: url(../img/site_title-pc.svg);
        background-position: 50% 50%;

        flex: 1 1 auto;
        max-width: 396px;
        margin-right: 20px;
    }

	.page_header .header_bar .box {
		align-self: flex-start;
	}

	.page_header .header_bar .inner {
		display: flex;
		align-self: center;
		align-items: center;
		margin-right: 0;
	}

    .page_header .header_bar .font_size_changer {
        align-self: flex-start;
        display: flex;
        align-items: center;
    }

    .page_header .header_bar .font_size_changer .label {
        font-size: 1.4rem;
        margin-right: 5px;
    }

    .page_header .header_bar .font_size_changer .btn {
        min-width: 44px;
        padding: 1px 5px;
        font-size: 1.4rem;
        line-height: 1;
        text-decoration: none;
        background-color: #F2F2F2;
        border: solid 1px #999999;
        text-align: center;
        margin-right: 2px;
        color: #000;
    }

    .page_header .header_bar .font_size_changer .btn:last-child { margin-right: 0; }
    .page_header .header_bar .font_size_changer .btn:visited { color: #000; }

    .page_header .header_bar .font_size_changer .btn.active {
        background-color: #002D5E;
        border-color: #002D5E;
        color: #fff;
    }

    .page_header .header_bar .contents_btn {
        margin: 0 20px 0 0;
    }

    .page_header .header_bar .en_link {
        align-self: flex-start;
        margin-left: 20px;
        margin-right: 0;
    }

    .page_header .header_bar .menu_btn {
        display: none;
    }

    .page_header .site_description {
        padding: 0 20px;
    }



    /* ------------------------------------------------
     * .page_sub
     * ----------------------------------------------- */

    .page_sub {
        /*flex: 0 0 auto;*/
        display: block;
        position: relative;
        width: 230px;
        height: auto;
        padding-top: 0;
    }

    .page_sub .page_sub_inner {
        position: fixed;
        top: 0;
        right: 0;
        padding-top: 25px;
        padding-bottom: 25px;
        width: 230px;
    }

    .page_sub .page_navigation ul li:not(:last-child) {
        padding-bottom: 6px;
    }

    .page_sub .page_navigation ul li a {
        padding-top: 4px;
        padding-bottom: 4px;
        margin-left: 20px;
    }

	.page_sub .page_navigation ul li a:hover {
		opacity: .8;
	}

    .page_sub .page_navigation ul li.active a::before {
        left: -20px;
        width: 20px;
    }

    .page_sub .sub_navigation ul li:not(:last-child) {
        padding-bottom: 6px;
    }

    .page_sub .sub_navigation ul li a {
        padding-top: 4px;
        padding-bottom: 4px;
        margin-left: 20px;
    }

	.page_sub .sub_navigation ul li a:hover {
		opacity: .8;
	}

    .page_sub .event_banner {
        margin-top: 15px;
        padding-left: 10px;
        padding-right: 10px;
    }

    .page_sub .riken_logo {
        margin-top: 20px;
        padding-left: 10px;
        padding-right: 10px;
		text-align: center;
    }



    /* ------------------------------------------------
     * .page_footer
     * ----------------------------------------------- */

    .page_footer {
        margin-top: 80px;
    }



    /* ------------------------------------------------
     * .top_banner_section
     * ----------------------------------------------- */

    .top_banner_section {
        margin-top: 20px;
    }



    /* ------------------------------------------------
     * .summary_link_section
     * ----------------------------------------------- */

    .summary_link_section {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        max-width: 960px;
        padding: 0 20px;
        margin: 30px auto 0;
    }

    .summary_link_section .block {
        flex: 0 1 auto;
        padding: 0;
    }

    .summary_link_section .block .block_inner {
        position: relative;
    }

    .summary_link_section .block.spring8 {
        width: 46.875%;
    }

    .summary_link_section .block.sacla {
        width: 46.875%;
    }

    .summary_link_section .block.rsc {
        width: 100%;
        margin-top: 5.2%;
    }

    .summary_link_section .block.spring8 .title {
        background-image: url(../img/summury_visual_spring8-pc.jpg);
        padding-top: 60%;
    }

    .summary_link_section .block.sacla .title {
        background-image: url(../img/summury_visual_sacla-pc.jpg);
        padding-top: 60%;
    }

    .summary_link_section .block.rsc .title {
        background-image: url(../img/summury_visual_rsc-pc.jpg);
        padding-top: 17.7%;
    }

    .summary_link_section .block .content {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        border-top: none;
        background: rgba(0, 45, 94, 0.95);
        color: #fff;
        padding: 15px 20px 20px;
        overflow-y: auto;
    }

    .summary_link_section .block .content .title_pc {
        display: block;
        text-align: center;
        margin-bottom: 8px;
    }

    .summary_link_section .block .content .title_pc .sub {
        font-size: 1.6rem;
        font-weight: bold;
        margin-right: 1rem;
    }

    .summary_link_section .block .content .title_pc .main {
        font-size: 2.0rem;
        font-weight: bold;
    }

	.summary_link_section .block .content .title_pc .main::after {
		background-image: url(../img/link_icon-external_white.svg);
	}

    .summary_link_section .block:not(:hover) .content {
        display: none;
    }

    .summary_link_section .block .focus .content {
        display: block;
    }



    /* ------------------------------------------------
     * .middle_banner_section
     * ----------------------------------------------- */

    .middle_banner_section {
        margin-top: 40px;
        padding-left: 20px;
        padding-right: 20px;
    }



    /* ------------------------------------------------
     * .news_section
     * ----------------------------------------------- */

    .news_viewer .date_controller .iterate_navigation .next_link:hover,
    .news_viewer .date_controller .iterate_navigation .prev_link:hover {
        cursor: pointer;
        text-decoration: none;
    }

    .news_viewer .date_controller .backnumber_navigation .year_link_box {
        padding-bottom: 2px;
        margin-top: 15px;
    }

    .news_viewer .date_controller .backnumber_navigation .year_link_box .year_link {
        /*flex: 0 0 calc(100% / 15);*/
		width: 6.6%;
        margin-bottom: 13px;
    }

    .news_viewer .date_controller .backnumber_navigation .year_link_box .year_link:hover {
        cursor: pointer;
        text-decoration: none;
    }

    .news_viewer .category_controller .select_all_link:hover {
        cursor: pointer;
        text-decoration: none;
    }

    .news_viewer .news_box {
        padding: 15px 30px;
    }

    .news_viewer .news_box .news_list .news {
        display: flex;
        align-items: center;
    }

    .news_viewer .news_box .news_list .news .data {
        display: block;
    }

    .news_viewer .news_box .news_list .news .data .category {
        font-size: 1.3rem;
        width: 106px;
    }

    .news_viewer .news_box .news_list .news .data .date {
        margin-left: 0;
        margin-top: 5px;
    }

    .news_viewer .news_box .news_list .news .content {
        margin-top: 0;
        margin-left: 25px;
    }



    /* ------------------------------------------------
     * .about_section
     * ----------------------------------------------- */

    .about_section .shortcut_links {
        margin-top: 40px;
    }

    /* .middle_section_kyoten */

	.lead_text_kyoten {
		padding-top: 0;
		margin-top: 60px;
	}

    .about_section .middle_section_kyoten .layout_wrapper {
        display: flex;
    }

    .about_section .middle_section_kyoten .figure {
        flex: 1 1 auto;
    }

    .about_section .middle_section_kyoten.kokunai .figure { width: 47.91%; }
    .about_section .middle_section_kyoten.kokugai .figure { width: 53.12%; }

    .about_section .middle_section_kyoten .kyoten_list {
        flex: 1 100 auto;
        margin-top: 0;
        margin-left: 5.2%;
    }

    .about_section .middle_section_kyoten .kyoten_list .kyoten {
        margin-top: 15px;
    }

    .about_section .middle_section_kyoten .kyoten_list .kyoten .name {
        font-size: 1.8rem;
    }

    /* .middle_seciton_gaiyou */

    .about_section .middle_seciton_gaiyou .layout_wrapper {
        display: flex;
    }

    .about_section .middle_seciton_gaiyou .picture {
        flex: 1 1 auto;
        width: 47.91%;
    }

    .about_section .middle_seciton_gaiyou .description {
        flex: 1 100 auto;
        margin-top: 0;
        margin-left: 5.2%;
    }

    /* .middle_seciton_soshikizu */

    .about_section .middle_seciton_soshikizu .layout_wrapper {
        display: flex;
    }

    .about_section .middle_seciton_soshikizu .figure {
        flex: 1 1 auto;
        width: 47.91%;
    }

    .about_section .middle_seciton_soshikizu .description {
        flex: 1 100 auto;
        margin-top: 0;
        margin-left: 5.2%;
    }

    /* .middle_section_enkaku */

    .about_section .middle_section_enkaku .enkaku_box {
        padding: 30px 30px;
        max-height: 450px;
    }
	
	.about_section .middle_section_enkaku .enkaku_box .enkaku_list .enkaku .date {
		width: 90px;
		padding-top: 2px;
	}

    /* .middle_section_column */

    .about_section .middle_section_column .columns .column {
        padding-left: 20px;
        padding-right: 20px;
    }

    .about_section .middle_section_column .columns .column .title {
        font-size: 1.8rem;
    }

    .about_section .middle_section_column .columns .column .toggle_btn {
        font-size: 1.4rem;
        min-width: 125px;
        right: 20px;
    }

    .about_section .middle_section_column .columns .column .description .figure {
        float: left;
        margin-right: 30px;
    }

	.about_section .middle_section_column .columns .column:not(.open) .title {
		margin-top: -20px;
		padding-top: 20px;
	}

    .about_section .middle_section_column .columns .column:not(.open) .description { display: block; }



    /* ------------------------------------------------
     * .event_section
     * ----------------------------------------------- */

    .event_section .catch_text {
        font-size: 2.0rem;
        margin-top: 30px;
    }

    /* .middle_section_tour */

    .event_section .middle_section_tour .layout_wrapper {
        display: flex;
    }

    .event_section .middle_section_tour .layout_wrapper .visual {
        order: 2;
        margin-left: auto;
        padding-left: 3.12%;
    }

    .event_section .middle_section_tour .apply_btn {
        margin-top: 30px;
    }

    .event_section .middle_section_tour .apply_btn .btn {
        max-width: 450px;
        margin-left: auto;
        margin-right: auto;
    }

    .event_section .middle_section_tour .address_box {
        margin-top: 30px;
    }

    /* .middle_section_koukai */

    .event_section .middle_section_koukai .gallery {
        margin-top: 30px;
        overflow: hidden;
    }

    .event_section .middle_section_koukai .gallery .title .main {
        display: inline;
    }

    .event_section .middle_section_koukai .gallery .title .sub {
        display: inline;
    }

    .event_section .middle_section_koukai .gallery .photo_list {
        justify-content: flex-start;
        margin-top: 10px;
        margin-left: 0;
        margin-right: 0;
    }

    .event_section .middle_section_koukai .gallery .photo_list .photo {
        width: 100px;
    }

    .event_section .middle_section_koukai .gallery .note {
        margin-top: 10px;
    }

    .event_section .middle_section_koukai .address_box {
        margin-top: 30px;
    }

    /* .middle_section_optpia */

    .event_section .middle_section_optpia .address_box {
        margin-top: 30px;
    }



    /* ------------------------------------------------
     * .access_section
     * ----------------------------------------------- */

    .access_section .layout_wrapper {
        display: flex;
    }

    .access_section .description {
        background-image: none;
        padding-right: 4.16%;
    }

    .access_section .description .campus_name .laboratory {
        font-size: 2.0rem;
    }

    .access_section .description .campus_name .branch {
        font-size: 3.0rem;
    }

    .access_section .description .address {
        margin-top: 30px;
    }

    .access_section .description .visual {
        display: block;
        margin-top: 30px;
    }

    .access_section .map {
        width: 69.79%;
        padding-bottom: 36.45%;
        margin-left: auto;
    }

    .access_section .note {
        margin-top: 30px;
    }



    /* ------------------------------------------------
     * .contact_section
     * ----------------------------------------------- */

    .contact_section .externals {
        display: flex;
        justify-content: space-between;
        margin-top: 60px;
    }

    .contact_section .externals .external {
        flex: 1 1 auto;
        margin-top: 0;
        margin-left: 2.08%;
        margin-right: 2.08%;
    }

    .contact_section .externals .external:first-child { margin-left: 0; }
    .contact_section .externals .external:last-child { margin-right: 0; }

    .contact_section .externals .external .note {
        font-size: 1.6rem;
        margin-top: 10px;
    }


    .contact_section .externals .external2 {
         width: 47.91%;
    }
		
	.contact_section .externals .external2:first-child { margin-left: 0; }
    .contact_section .externals .external2:last-child { margin-right: 0; }

    .contact_section .externals .external2 .note {
        font-size: 1.6rem;
        margin-top: 10px;
	}
		
    .contact_section .enquiry_info .phone .tel {
        margin-right: 20px;
    }



	/* ------------------------------------------------
	 * link
	 * ----------------------------------------------- */

	a.pagetop {
		width: 50px;
		height: 50px;
		cursor: pointer;
		background: url(../img/btn_page-top.svg);
		background-size: 50px 100px;
		position: fixed;
		right: 250px;
		bottom: 20px;
	}

	a.pagetop:hover {
		background-position: left bottom;
	}

}