@charset "utf-8";

body {
	background-image: url(../image/background.png);
	background-position: center;
}

/* ヘッダー */
header {
	box-shadow: 0px 0px 3px 3px #CCCCCC;
	margin-bottom: 20px;
	width: 100%;
	background: rgba(255,255,255,0.7);
	backdrop-filter: blur(10px);
	-webkit-backdrop-filter: blur(10px);
	position: fixed;
	top: 0;
	z-index: 101;
}
header u {
	display: block;
	height: 20px;
	line-height: 20px;
	background: linear-gradient(109deg, rgba(230, 0, 0, 1) 0%, rgba(244, 44, 44, 1) 100%);
	text-decoration: none;
	text-align: center;
	color: #FFF;
	font-weight: bold;
}
header h1 {
	text-align: center;
	padding: 10px;
	transition: all 0.4s;
}
header h1 img {
	max-width: 100%;
	transition: all 0.4s;
	height: 40px;
}
header .header_icon ul {
	display: flex;
	height: 35px;
	position: absolute;
	top: 15px;
	right: 15px;
	overflow: hidden;
	transition: all 0.4s;
}
header .header_icon li {
	width: 35px;
	margin-left: 15px;
	opacity: 0.7;
}
header .header_icon li label {
	cursor: pointer;
}
header .header_icon li img {
	height: 35px;
}
header #langChange {
	height: 24px;
	overflow: hidden;
	transition: all 0.4s;
}
header #langChange input[type="radio"] {
	display: none;
}
header #langChange ul {
  display: flex;
	padding:  2px 0;
}
header #langChange li {
	width: 100%;
	text-align: center;
	border-left: solid 1px #39F;
}
header #langChange li:first-child {
	border: none;
}
header #langChange li label {
	display: block;
	color: #333;
	font-size: 1.1rem;
	line-height: 20px;
	position: relative;
	transition: all 0.4s;
}
header #langChange li label:hover {
	background-color: #39F;
	color: #FFF;
	cursor: pointer;
}
header #langChange #selectLang_ja:checked ~ ul > li label[for="selectLang_ja"]:after,
header #langChange #selectLang_en:checked ~ ul > li label[for="selectLang_en"]:after,
header #langChange #selectLang_zh_tw:checked ~ ul > li label[for="selectLang_zh_tw"]:after,
header #langChange #selectLang_ko:checked ~ ul > li label[for="selectLang_ko"]:after {
	content: "";
	display: block;
	width: 7px;
	height: 14px;
	border: solid #0F0;
	border-width: 0 4px 4px 0;
	transform: rotate(45deg);
	position: absolute;
	left: 20%;
	top: -2px;
}
body > input[type="checkbox"] {
	display: none;
}
body > input[type="checkbox"]:checked + header #langChange {
	height: 0;
	overflow: hidden;
}
body > input[type="checkbox"]:checked ~ main {
	padding: 80px 0px 15px;
}


/* メイン */
main {
	width: 1000px;
	max-width: 98%;
	margin: 15px auto 60px;
	padding: 120px 0px 15px;
	font-size: 1.4rem;
	line-height: 1.4;
	transition: all 0.4s;
}
section {
	margin: 0 auto 30px;
}
h2 {
	margin: 0 0 15px;
	padding: 0 0 5px;
	text-align: center;
	border-bottom: solid 2px #888;
}


/* フッター */
footer {
	width: 100%;
	margin-top: 20px;
	position: fixed;
	bottom: 0;
	z-index: 101;
}
footer .backToTop {
	background-color: #000;
	text-align: center;
	font-size: 1.3rem;
	line-height: 24px;
	height: 0;
	overflow: hidden;
	transition: all 0.4s;
}
footer .backToTop a {
	color: #FFF;
	text-decoration: none;
	display: block;
}
footer .backToTop a:hover {
	background-color: #666;
}
footer .copy {
	text-align: center;
	color: #FFF;
	padding: 5px;
	background: linear-gradient(109deg, rgba(230, 0, 0, 1) 0%, rgba(244, 44, 44, 1) 100%);
}
footer .copy a {
	color: #FFF;
}


/* スクロールしたときの挙動 */
header.is-animation h1 {
	padding: 4px;
}
header.is-animation h1 img {
	height: 20px;
}
header.is-animation u {
	height: 8px;
	font-size: 0;
}
header.is-animation .header_icon ul {
	height: 0;
}
header.is-animation #langChange {
	height: 0;
}
footer.is-animation .backToTop {
	height: 24px;
}