@charset "utf-8";
@import url('https://fonts.googleapis.com/css2?family=BIZ+UDPGothic:wght@400;700&display=swap');

html {
	font-size: 62.5%;
}
body {
  width: 100%;
  height: 100%;
  background: #90cdfd;
  color: #000;
	font-family: "BIZ UDPGothic", sans-serif;
  font-weight: 400;
  font-style: normal;
	font-size: clamp(1.3rem, 3.307vw, 1.6rem);
	/* iphone16 393 */
	letter-spacing: .05em;
  line-height: 1.7;
	overflow-x: hidden;
}
article {
	padding-bottom: 5em;
}
a {
	color: #0359a2;
	text-decoration: underline;
}
a:hover {
	color: #0071bc;
	text-decoration: none;
}
img {
  width: auto;
  max-width: 100%;
}
section + section {
	margin-top: 5em;
}
.container {
	width: 90%;
	max-width: 960px;
	margin: 0 auto;
}
.flex {
	display: flex;
	flex-flow: row nowrap;
	justify-content: space-between;
}
.mt05 {margin-top: .5em;}
.mt10 {margin-top: 1em;}
.fs_small {font-size: 85%;}
.list > li {
	position: relative;
	padding-left: 1.3em;
}
.list > li::before {
	position: absolute;
	top: 0;
	left: 0;
}
.list.kome > li::before {
	content: "※";
}
.list.dot > li::before {
	content: "●";
}
.heading {
	background: url("../images/bg_main.jpg?date=20260126") no-repeat center top / cover;
	color: #040a2c;
	text-align: center;
	text-shadow: 0 0 1px #fff,
							 0 0 5px #fff,
							 0 0 5px #fff,
							 0 0 5px #fff;
	padding: 8vw 0 20vw;
	position: relative;
	z-index: 1;
}
.heading._clear {
	background: url("../images/bg_main2.jpg") no-repeat center top / cover;
}
.heading::before {
	content: "画像提供：国立極地研究所";
	font-size: 80%;
	text-shadow: 0 0 1px #90cdfd,
							 0 0 5px #90cdfd,
							 0 0 5px #90cdfd,
							 0 0 5px #90cdfd;
	position: absolute;
	bottom: 0;
	right: 1em;
}
.heading::after {
	content: "";
	width: 100%;
	height: 10vw;
	background: linear-gradient(rgba(144,205,253,0) 0%, rgba(144,205,253,100%) 100%);
	position: absolute;
	left: 0;
	bottom: 0;
	z-index: -1;
}
.heading ._titbox {
	padding: 2em 5%;
	position: relative;
}
.heading ._titbox::before {
	content: "";
	width: 120%;
	height: 100%;
	background: url("../images/il_antarctic.png?date=20260126") no-repeat center center / auto 100%;
	mix-blend-mode: overlay;
	position: absolute;
	top: 0;
	left: 50%;
	transform: translateX(-50%);
	z-index: -1;
}
.heading ._titbox ._stit {
	font-size: 115%;
	font-weight: 700;
}
.heading ._titbox ._tit {
	width: 100%;
	max-width: 800px;
	margin: 0 auto 1.5em;
}
.heading ._titbox ._catch {
	font-size: 115%;
	font-weight: 700;
}
.heading ._body {
	width: 90%;
	max-width: 960px;
	margin: 0 auto;
	text-align: left;
}
.heading ._body > * + * {
	margin-top: 1em;
}
.heading ._body + * {
	margin-top: 1em;
}

.sec_tit {
	text-align: center;
	margin-bottom: 1em;
}
.sec_tit img {
	width: 65%;
	max-width: 320px;
}
.news_list {
	display: flex;
	flex-flow: column nowrap;
	justify-content: center;
}
.news_box {
	color: inherit;
	text-decoration: none;
	background: #fff;
	box-shadow: 0 0 10px rgba(4,10,44,.5);
	padding: 1.25em;
	position: relative;
}
.news_box + .news_box {
	margin-top: 1.5em;
}
.news_box ._img {
	width: 40%;
	aspect-ratio: 211 / 200;
	float: right;
	margin-left: .5em;
}
.news_box ._img._txt {
	display: flex;
	flex-flow: column wrap;
	justify-content: center;
	align-items: center;
	background: linear-gradient(135deg, #fdeeed 0%, #fdd3a4 100%);
	color: #f11c20;
	font-size: clamp(2.0rem, 5.333vw, 2.6rem);
}
.news_box ._img._soon {
	display: flex;
	flex-flow: column wrap;
	justify-content: center;
	align-items: center;
	background: linear-gradient(135deg, #e6e6ea 0%, #cdced5 100%);
	color: #818495;
	font-size: clamp(2.0rem, 5.333vw, 2.6rem);
	line-height: 1.2;
	text-align: center;
}
.news_box ._img ._credit {
	font-size: 70%;
	letter-spacing: 0;
	line-height: 1.3;
	text-align: right;
	margin-top: .5em;
}
.news_box ._date {
	background: #f0514d;
	color: #fff;
	font-weight: 700;
	line-height: 1;
	padding: .75em 1em;
	position: absolute;
	top: 0;
	left: 0;
}
.news_box:nth-child(3n+2) ._date {
	background: #39ab8a;
}
.news_box:nth-child(3n+3) ._date {
	background: #1789bb;
}
.news_box ._date > span {
	font-size: 160%;
}
.news_box ._date + * {
	margin-top: 3em;
}
.news_box ._stit {
	font-size: 90%;
	letter-spacing: 0;
	line-height: 1.4;
	margin-bottom: .25em;
}
.news_box ._tit {
	font-size: 125%;
	line-height: 1.3;
	margin-bottom: .25em;
}
.news_box ._tit .fs_small {
	display: block;
	font-size: 75%;
	margin-top: .3em;
}
.news_box ._lead {
	line-height: 1.4;
}
.news_box ._list {
	margin-top: .5em;
}
.news_box ._list > li {
	font-size: 90%;
	line-height: 1.3;
	position: relative;
	padding-left: 3.5em;
}
.news_box ._list > li._w2 {
	padding-left: 6.25em;
}
.news_box ._list > li ._list_tit {
	position: absolute;
	top: 0;
	left: 0;
}
.news_box ._list > li ._list_tit::after {
	content: " ：";
}
.news_box ._list > li + li {
	margin-top: .2em;
}
.news_box ._list._toi > li {
	padding-left: 7.25em;
}
.news_box ._list._toi > li ._list_tit {
	letter-spacing: 0;
}
.news_box ._linktxt {
	color: #0359a2;
	text-decoration: underline;
}
.link_list {
	background: #fff;
	box-shadow: 0 0 10px rgba(4,10,44,.5);
	padding: 1.5em 6%;
}
.link_list .list.dot > li {
	padding-top: .75em;
	padding-bottom: .75em;
	line-height: 1.4;
}
.link_list .list.dot > li + li {
	border-top: 1px solid #b4b5c0;
}
.link_list .list.dot > li::before {
	color: #f0514d;
	top: .75em;
}
.link_list .list.dot > li:nth-child(3n+2)::before {
	color: #39ab8a;
}
.link_list .list.dot > li:nth-child(3n+3)::before {
	color: #1789bb;
}
footer {
	font-size: 80%;
	text-align: center;
	padding: 1em 0;
}

@media only screen and (min-width: 769px) {
	body {
		width: 100%;
		font-size: clamp(1.6rem, 1.1713vw, 2.0rem);
	}
	.heading {
		padding: 6vw 0 10vw;
		margin-bottom: 5em;
	}
	.heading ._titbox ._catch {
		font-size: 130%;
	}
	.sec_tit {
		margin-bottom: 2em;
	}
	.news_list {
		flex-flow: row wrap;
		justify-content: space-between;
	}
	.news_box {
		width: 48%;
		transition: .5s;
	}
	.news_box + .news_box {
		margin-top: 0;
	}
	.news_box:nth-child(n+3) {
		margin-top: 2em;
	}
	.news_box ._tit {
		font-size: 140%;
	}
	.news_box ._stit,
	.news_box ._lead,
	.news_box ._list > li {
		line-height: 1.5;
	}
	a.news_box:hover {
		opacity: .7;
	}
	.news_box ._img ._credit {
		font-size: 80%;
	}
	footer {
		padding: 2em 0;
	}
	
}