@charset "utf-8";

/* ============================================================
   patent.css — 特許情報ページ リデザイン (2026-05-27)
   aboutus.css の CH.XX 形式 / 左サイドナビ体系に統一
   - body.patent-page スコープでこのページ限定
   - 戻す場合: index.html.bak で復元 + body class と link を解除
============================================================ */

/* ===== ページ全体ベース ===== */
body.patent-page main {
	background: #fff;
}

/* common.css の section { overflow: hidden } が sticky を阻害するため解除 */
body.patent-page .patent_contents_left section,
body.patent-page .patent_contents_left .patent_c-section {
	margin-bottom: 0;
	overflow: visible;
}

/* ===== リード（ページ導入）===== */
body.patent-page .patent_lead {
	max-width: 1000px;
	margin: clamp(4.8rem, 6vw, 8rem) auto 0;
	padding: 0 clamp(1.6rem, 4vw, 4rem);
	text-align: left; /* 2026-06-02 中央→左寄せ（見出し・アイブロウ・線・本文の起点を統一） */
}

body.patent-page .patent_lead-eyebrow {
	display: block;
	font-family: "droid-sans", "Helvetica Neue", sans-serif;
	font-size: 1.2rem;
	font-weight: 700;
	letter-spacing: 0.3em;
	color: #286BC1;
	margin-bottom: 1.8rem;
}

body.patent-page .patent_lead-h {
	font-family: "游ゴシック体", "Yu Gothic", YuGothic, "ヒラギノ角ゴ ProN", sans-serif;
	font-size: clamp(2.6rem, 3.6vw, 3.6rem);
	font-weight: 700;
	line-height: 1.5;
	letter-spacing: 0.06em;
	color: #1a2233;
	margin: 0 0 2.8rem;
	text-wrap: balance;
}

body.patent-page .patent_lead-h::after {
	content: "";
	display: block;
	width: 56px;
	height: 3px;
	background: #64CCBF;
	margin: 2rem 0 0; /* 2026-06-02 中央(auto)→左寄せ */
}

body.patent-page .patent_lead-text {
	font-size: 1.5rem;
	line-height: 1.95;
	color: #4b5563;
	letter-spacing: 0.04em;
	text-align: justify;
}

body.patent-page .patent_lead-text p {
	margin: 0 0 1.6rem;
}

body.patent-page .patent_lead-text p:last-child {
	margin-bottom: 0;
}

/* ===== 2-col レイアウト（右→左反転）===== */
body.patent-page .patent_contents_inner {
	display: flex;
	flex-direction: row-reverse;
	align-items: flex-start;
	gap: clamp(2.4rem, 3vw, 5.6rem);
	max-width: 1480px;
	margin: 0 auto;
	padding: 0 clamp(1.6rem, 4vw, 4rem);
	padding-top: clamp(4rem, 6vw, 8rem);
}

body.patent-page .patent_contents_left {
	flex: 1 1 0%;
	min-width: 0;
}

body.patent-page .patent_contents_right {
	display: block;
	flex: 0 0 200px;
	width: 200px;
	padding: 0;
	align-self: stretch;
}

/* ===== 左サイド・ラベル付きリスト（CH ナビ）===== */
body.patent-page .patent_anker {
	position: sticky;
	top: 12rem;
	padding: 0 0 6.4rem;
	margin: 0;
}

body.patent-page .patent_anker_title {
	font-family: "droid-sans", "Helvetica Neue", sans-serif;
	font-size: 1.1rem;
	font-weight: 700;
	letter-spacing: 0.3em;
	color: #286BC1;
	margin: 0 0 2.4rem;
	padding: 0;
	border: none;
}

body.patent-page .patent_anker ul {
	list-style: none;
	margin: 0;
	padding: 0;
	counter-reset: patent-ch;
	position: relative;
}

body.patent-page .patent_anker ul::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0.4rem;
	bottom: 0.4rem;
	width: 1px;
	background: rgba(26, 34, 51, 0.1);
}

body.patent-page .patent_anker ul li {
	counter-increment: patent-ch;
	margin: 0;
	padding: 0;
	position: relative;
}

body.patent-page .patent_anker ul li a {
	display: flex;
	align-items: baseline;
	gap: 1rem;
	padding: 1.2rem 0 1.2rem 2rem;
	font-size: 1.3rem;
	font-weight: 500;
	color: rgba(26, 34, 51, 0.55);
	text-decoration: none;
	letter-spacing: 0.04em;
	position: relative;
	transition: color 0.25s ease, font-weight 0.25s ease;
}

body.patent-page .patent_anker ul li a::before {
	content: counter(patent-ch, decimal-leading-zero);
	font-family: "droid-sans", "Helvetica Neue", sans-serif;
	font-size: 1rem;
	letter-spacing: 0.16em;
	color: rgba(26, 34, 51, 0.4);
	flex-shrink: 0;
	transition: color 0.25s ease;
}

body.patent-page .patent_anker ul li a::after {
	content: "";
	position: absolute;
	left: 0;
	top: 50%;
	transform: translateY(-50%);
	width: 2px;
	height: 0;
	background: #286BC1;
	transition: height 0.25s ease;
}

body.patent-page .patent_anker ul li a:hover,
body.patent-page .patent_anker ul li a.active,
body.patent-page .patent_anker ul li a.is-active {
	color: #286BC1;
	font-weight: 700;
}

body.patent-page .patent_anker ul li a:hover::before,
body.patent-page .patent_anker ul li a.active::before,
body.patent-page .patent_anker ul li a.is-active::before {
	color: #286BC1;
}

body.patent-page .patent_anker ul li a:hover::after,
body.patent-page .patent_anker ul li a.active::after,
body.patent-page .patent_anker ul li a.is-active::after {
	height: 70%;
}

/* ===== 共通セクションコンテナ ===== */
body.patent-page .patent_c-section {
	padding: 12.8rem 0 0;
}

/* 先頭セクションはリード直下のため上余白を圧縮 */
body.patent-page .patent_contents_left > .patent_c-section:first-child {
	padding-top: 8rem;
}

body.patent-page .patent_c-inner {
	max-width: 1440px;
	margin: 0 auto;
}

/* ===== 共通見出し（CH.XX 形式）===== */
body.patent-page .patent_c-head {
	margin-bottom: 4.8rem;
}

body.patent-page .patent_c-ch {
	display: block;
	font-family: "droid-sans", "Helvetica Neue", sans-serif;
	font-size: 1.2rem;
	letter-spacing: 0.3em;
	color: #286BC1;
	font-weight: 700;
	margin-bottom: 1.6rem;
}

body.patent-page .patent_c-h {
	display: inline-block;
	font-family: "游ゴシック体", "Yu Gothic", YuGothic, "ヒラギノ角ゴ ProN", sans-serif;
	font-weight: 700;
	font-size: 2.6rem;
	letter-spacing: 0.05em;
	line-height: 1.4;
	color: #1a2233;
	margin: 0;
	text-wrap: balance;
}

body.patent-page .patent_c-h::after {
	content: "";
	display: block;
	width: 56px;
	height: 3px;
	background: #64CCBF;
	margin-top: 1.6rem;
}

body.patent-page .patent_c-en {
	display: block;
	font-family: "droid-sans", "Helvetica Neue", sans-serif;
	font-size: 1.2rem;
	letter-spacing: 0.28em;
	color: #4b5563;
	margin-top: 1.2rem;
	font-weight: 700;
}

/* ===== CH.01 沿革：フラット年表 + トグル ===== */
body.patent-page .patent_c-history {
	max-width: 1080px;
	margin: 0 auto;
}

body.patent-page .patent_c-history-list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	position: relative;
}

body.patent-page .patent_c-history-item {
	display: grid;
	grid-template-columns: 8rem 1fr;
	gap: 2rem;
	align-items: baseline;
	padding: 1.4rem 0;
	border-bottom: 1px dashed rgba(26, 34, 51, 0.1);
}

body.patent-page .patent_c-history-item.is-collapsed {
	display: none;
}

body.patent-page .patent_c-history-list.is-expanded .patent_c-history-item.is-collapsed {
	display: grid;
}

body.patent-page .patent_c-history-year {
	font-family: "droid-sans", "Helvetica Neue", sans-serif;
	font-size: 1.6rem;
	font-weight: 700;
	color: #286BC1;
	letter-spacing: 0.06em;
	line-height: 1.5;
}

body.patent-page .patent_c-history-text {
	font-size: 1.4rem;
	line-height: 1.9;
	color: #1a2233;
	letter-spacing: 0.03em;
	margin: 0;
	text-wrap: pretty;
}

body.patent-page .patent_c-history-toggle-wrap {
	display: flex;
	justify-content: center;
	margin-top: 3.6rem;
	position: relative;
}

body.patent-page .patent_c-history-toggle-wrap::before {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	top: -8rem;
	height: 8rem;
	background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, #fff 100%);
	pointer-events: none;
	transition: opacity 0.25s ease;
}

body.patent-page .patent_c-history-toggle-wrap.is-expanded::before {
	opacity: 0;
}

body.patent-page .patent_c-history-toggle {
	display: inline-flex;
	align-items: center;
	gap: 1rem;
	padding: 1.4rem 3.6rem;
	background: #fff;
	border: 1px solid rgba(40, 107, 193, 0.4);
	border-radius: 999px;
	color: #286BC1;
	font-family: inherit;
	font-size: 1.35rem;
	font-weight: 700;
	letter-spacing: 0.16em;
	cursor: pointer;
	transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
	-webkit-appearance: none;
	appearance: none;
}

body.patent-page .patent_c-history-toggle:hover {
	background: #286BC1;
	color: #fff;
	border-color: #286BC1;
	transform: translateY(-1px);
}

body.patent-page .patent_c-history-toggle:focus-visible {
	outline: 2px solid #286BC1;
	outline-offset: 3px;
}

body.patent-page .patent_c-history-toggle-icon {
	font-size: 1.1rem;
	transition: transform 0.25s ease;
}

body.patent-page .patent_c-history-toggle[aria-expanded="true"] .patent_c-history-toggle-icon {
	transform: rotate(180deg);
}

/* ===== CH.02-04 知的財産：カードグリッド ===== */
body.patent-page .patent_c-ip-list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(30rem, 1fr));
	gap: 1.6rem;
}

body.patent-page .patent_c-ip-item {
	display: flex;
	flex-direction: column;
	padding: 2.4rem 2.4rem;
	background: #fafafa;
	border: 1px solid rgba(26, 34, 51, 0.08);
	border-left: 3px solid #286BC1;
	border-radius: 4px;
	transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

body.patent-page .patent_c-ip-item:hover {
	transform: translateY(-2px);
	box-shadow: 0 12px 28px rgba(26, 34, 51, 0.08);
	border-color: rgba(40, 107, 193, 0.18);
	border-left-color: #286BC1;
}

body.patent-page .patent_c-ip-no {
	display: block;
	font-family: "droid-sans", "Helvetica Neue", sans-serif;
	font-size: 1.3rem;
	letter-spacing: 0.1em;
	color: #286BC1;
	font-weight: 700;
	margin-bottom: 0.8rem;
}

body.patent-page .patent_c-ip-name {
	font-size: 1.4rem;
	line-height: 1.7;
	color: #1a2233;
	margin: 0;
	font-weight: 500;
	flex: 1;
}

body.patent-page .patent_c-ip-mark {
	width: 80px;
	height: 80px;
	margin: 0.4rem 0 0.4rem;
	border: 1px solid rgba(26, 34, 51, 0.08);
	border-radius: 4px;
	background: #fff;
}

body.patent-page .patent_c-ip-link {
	display: inline-flex;
	align-items: center;
	gap: 0.6rem;
	align-self: flex-start;
	margin-top: 1.6rem;
	font-size: 1.25rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	color: #286BC1;
	text-decoration: none;
	transition: color 0.25s ease, gap 0.25s ease;
}

body.patent-page .patent_c-ip-link i {
	font-size: 1.1rem;
}

body.patent-page .patent_c-ip-link:hover {
	color: #1a3a6e;
	gap: 1rem;
}

body.patent-page .patent_c-ip-note {
	margin: 2.4rem 0 0;
	font-size: 1.25rem;
	color: #6b7280;
	letter-spacing: 0.04em;
	text-align: right;
}

/* ===== CH.05 特許庁・電子図書館：リンクカード ===== */
body.patent-page .patent_c-extlink {
	display: flex;
	align-items: center;
	gap: 2.4rem;
	max-width: 64rem;
	padding: 2.8rem 3.2rem;
	background: #fff;
	border: 1px solid rgba(26, 34, 51, 0.08);
	border-radius: 12px;
	text-decoration: none;
	transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

body.patent-page .patent_c-extlink:hover {
	transform: translateY(-2px);
	box-shadow: 0 12px 28px rgba(26, 34, 51, 0.08);
	border-color: rgba(40, 107, 193, 0.18);
}

body.patent-page .patent_c-extlink-icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 4.8rem;
	height: 4.8rem;
	flex-shrink: 0;
	font-size: 1.8rem;
	color: #286BC1;
	background: rgba(40, 107, 193, 0.08);
	border-radius: 50%;
}

body.patent-page .patent_c-extlink-body {
	display: flex;
	flex-direction: column;
	gap: 0.6rem;
	min-width: 0;
}

body.patent-page .patent_c-extlink-title {
	font-size: 1.6rem;
	font-weight: 700;
	color: #1a2233;
	letter-spacing: 0.04em;
}

body.patent-page .patent_c-extlink-text {
	font-size: 1.3rem;
	line-height: 1.7;
	color: #4b5563;
	letter-spacing: 0.03em;
}

/* ===== レスポンシブ ===== */
@media screen and (max-width: 1024px) {
	body.patent-page .patent_contents_inner {
		display: block;
		max-width: none;
	}

	body.patent-page .patent_contents_right {
		display: none;
	}

	body.patent-page .patent_c-section {
		padding: 9.6rem 0 0;
	}

	body.patent-page .patent_contents_left > .patent_c-section:first-child {
		padding-top: 6.4rem;
	}
}

@media screen and (max-width: 767px) {
	body.patent-page .patent_c-section {
		padding: 8rem 0 0;
	}

	body.patent-page .patent_c-h {
		font-size: 2.2rem;
	}

	body.patent-page .patent_c-history-item {
		grid-template-columns: 6rem 1fr;
		gap: 1.4rem;
		padding: 1.2rem 0;
	}

	body.patent-page .patent_c-history-year {
		font-size: 1.4rem;
	}

	body.patent-page .patent_c-history-text {
		font-size: 1.3rem;
	}

	body.patent-page .patent_c-history-toggle {
		padding: 1.2rem 2.8rem;
		font-size: 1.25rem;
	}

	body.patent-page .patent_c-history-toggle-wrap::before {
		top: -5.6rem;
		height: 5.6rem;
	}

	body.patent-page .patent_c-ip-list {
		grid-template-columns: 1fr;
	}

	body.patent-page .patent_c-ip-item {
		padding: 1.8rem 1.8rem;
	}

	body.patent-page .patent_c-extlink {
		gap: 1.8rem;
		padding: 2.2rem 2rem;
	}

	body.patent-page .patent_c-extlink-icon {
		width: 4rem;
		height: 4rem;
		font-size: 1.5rem;
	}

	body.patent-page .patent_c-extlink-title {
		font-size: 1.45rem;
	}
}