:root {
	--color-main: #475569;
	--color-sub: #f8fafc;
	--color-accent: #0ea5e9;
	--color-text: #0f172a;
	--color-border: #cbd5e1;
	--ds-main: var(--color-main);
	--ds-main-dark: #334155;
	--ds-main-deep: #1e293b;
	--ds-sub: var(--color-sub);
	--ds-accent: var(--color-accent);
	--ds-accent-dark: #0369a1;
	--ds-text: var(--color-text);
	--ds-muted: #64748b;
	--ds-border: var(--color-border);
	--ds-white: #fff;
	--ds-warning: #b45309;
	--ds-warning-bg: #fffbeb;
	--ds-success: #047857;
	--ds-font-heading: "Noto Sans JP", "Yu Gothic", sans-serif;
	--ds-font-latin: Inter, "Segoe UI", Arial, sans-serif;
	--ds-radius: 4px;
	--ds-shadow: 0 14px 36px rgba(15, 23, 42, .08);
}

.ds-article__content {
	color: var(--ds-text);
	font-size: 1rem;
	line-height: 1.95;
}

.ds-article__content > *:first-child {
	margin-top: 0;
}

.ds-article__content h2 {
	margin: 2.6em 0 1em;
	padding: .55em 0 .55em 18px;
	border-left: 5px solid var(--ds-main);
	background: linear-gradient(90deg, var(--ds-sub), transparent);
	font-size: clamp(1.35rem, 3.2vw, 1.8rem);
	line-height: 1.5;
}

.ds-article__content h3 {
	margin: 2em 0 .8em;
	padding-bottom: .45em;
	border-bottom: 2px solid var(--ds-border);
	font-size: clamp(1.16rem, 2.8vw, 1.42rem);
	line-height: 1.55;
}

.ds-article__content h4 {
	margin: 1.8em 0 .7em;
	font-size: 1.08rem;
}

.ds-article__content p {
	margin: 0 0 1.6em;
}

.ds-article__content ul:not([class]),
.ds-article__content ol:not([class]) {
	margin: 0 0 1.8em;
	padding-left: 1.5em;
}

.ds-article__content a {
	word-break: break-word;
}

.ds-article__content img {
	display: block;
	max-width: 100%;
	height: auto;
	margin-inline: auto;
	border-radius: var(--ds-radius);
}

.ds-article__content blockquote:not([class]) {
	margin: 2em 0;
	padding: 18px 22px;
	border-left: 4px solid var(--ds-border);
	background: var(--ds-sub);
	color: var(--ds-main);
}

.ds-toc {
	margin: 2.2em 0;
	overflow: hidden;
	border: 1px solid var(--ds-border);
	border-top: 5px solid var(--ds-main);
	border-radius: var(--ds-radius);
	background: var(--ds-sub);
}

.ds-toc__toggle {
	display: flex;
	width: 100%;
	align-items: center;
	justify-content: space-between;
	padding: 16px 20px;
	border: 0;
	background: transparent;
	color: var(--ds-text);
	font: inherit;
	font-weight: 800;
	cursor: pointer;
}

.ds-toc__list {
	margin: 0;
	padding: 0 24px 20px 46px;
}

.ds-toc__list[hidden] {
	display: none;
}

.ds-toc__item {
	margin: 6px 0;
}

.ds-toc__item--h3 {
	margin-left: 18px;
	font-size: .9em;
}

.ds-toc__item a {
	color: var(--ds-main-dark);
	text-decoration: none;
}

.ds-toc__item a:hover {
	color: var(--ds-accent-dark);
	text-decoration: underline;
}

.ds-point,
.ds-warning {
	position: relative;
	margin: 2em 0;
	padding: 24px 20px 20px;
	border: 1px solid #7dd3fc;
	border-radius: var(--ds-radius);
	background: #f0f9ff;
}

.ds-point::before,
.ds-warning::before {
	position: absolute;
	top: -14px;
	left: 16px;
	padding: 4px 12px;
	background: var(--ds-accent-dark);
	color: var(--ds-white);
	font-family: var(--ds-font-latin);
	font-size: .7rem;
	font-weight: 800;
	letter-spacing: .12em;
	content: "POINT";
}

.ds-point > *:last-child,
.ds-warning > *:last-child {
	margin-bottom: 0;
}

.ds-warning {
	border-color: #fbbf24;
	background: var(--ds-warning-bg);
}

.ds-warning::before {
	background: var(--ds-warning);
	content: "CAUTION";
}

.ds-checklist {
	margin: 2em 0;
	padding: 22px;
	border: 1px solid var(--ds-border);
	border-radius: var(--ds-radius);
	background: var(--ds-white);
	box-shadow: 5px 5px 0 #e2e8f0;
}

.ds-checklist__title {
	margin: 0 0 14px !important;
	padding: 0 0 10px !important;
	border: 0 !important;
	border-bottom: 1px solid var(--ds-border) !important;
	background: none !important;
	font-size: 1.05rem !important;
}

.ds-checklist__items {
	display: grid;
	gap: 10px;
	margin: 0 !important;
	padding: 0 !important;
	list-style: none;
}

.ds-checklist__items li {
	position: relative;
	padding-left: 28px;
}

.ds-checklist__items li::before {
	position: absolute;
	top: .45em;
	left: 0;
	width: 16px;
	height: 16px;
	border: 2px solid var(--ds-success);
	background: var(--ds-white);
	content: "";
}

.ds-checklist__items li::after {
	position: absolute;
	top: .53em;
	left: 4px;
	width: 8px;
	height: 4px;
	transform: rotate(-45deg);
	border-bottom: 2px solid var(--ds-success);
	border-left: 2px solid var(--ds-success);
	content: "";
}

.ds-table-wrap {
	margin: 2em 0;
	overflow-x: auto;
	border: 1px solid var(--ds-border);
	border-radius: var(--ds-radius);
	-webkit-overflow-scrolling: touch;
}

.ds-table {
	width: 100%;
	min-width: 640px;
	border-collapse: collapse;
	font-size: .88rem;
}

.ds-table th,
.ds-table td {
	padding: 14px 16px;
	border-right: 1px solid var(--ds-border);
	border-bottom: 1px solid var(--ds-border);
	text-align: left;
	vertical-align: top;
}

.ds-table th {
	background: var(--ds-main);
	color: var(--ds-white);
	white-space: nowrap;
}

.ds-table tr:nth-child(even) td {
	background: var(--ds-sub);
}

.ds-table tr:last-child td {
	border-bottom: 0;
}

.ds-faq {
	margin: 2em 0;
}

.ds-faq__item {
	margin-bottom: 12px;
	overflow: hidden;
	border: 1px solid var(--ds-border);
	border-radius: var(--ds-radius);
}

.ds-faq__question {
	position: relative;
	margin: 0 !important;
	padding: 17px 20px 17px 50px;
	background: var(--ds-sub);
	font-weight: 800;
}

.ds-faq__question::before,
.ds-faq__answer::before {
	position: absolute;
	top: 15px;
	left: 18px;
	color: var(--ds-accent-dark);
	font-family: var(--ds-font-latin);
	font-size: 1.1rem;
	font-weight: 800;
	content: "Q";
}

.ds-faq__answer {
	position: relative;
	padding: 17px 20px 17px 50px;
	border-top: 1px solid var(--ds-border);
}

.ds-faq__answer::before {
	color: var(--ds-main);
	content: "A";
}

.ds-faq__answer > *:last-child {
	margin-bottom: 0;
}

.ds-related-card {
	display: grid;
	gap: 16px;
	margin: 2em 0;
	padding: 16px;
	border: 1px solid var(--ds-border);
	border-left: 5px solid var(--ds-main);
	border-radius: var(--ds-radius);
	color: var(--ds-text);
	text-decoration: none;
}

.ds-related-card:hover {
	border-color: var(--ds-accent);
	color: var(--ds-text);
	box-shadow: var(--ds-shadow);
}

.ds-related-card__image {
	overflow: hidden;
	aspect-ratio: 600 / 315;
	background: #e2e8f0;
}

.ds-related-card__image img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.ds-related-card__label {
	display: block;
	margin-bottom: 5px;
	color: var(--ds-accent-dark);
	font-size: .7rem;
	font-weight: 800;
	letter-spacing: .08em;
}

.ds-related-card__title {
	font-weight: 800;
	line-height: 1.6;
}

.ds-balloon {
	display: flex;
	gap: 14px;
	align-items: flex-start;
	margin: 2em 0;
}

.ds-balloon--right {
	flex-direction: row-reverse;
}

.ds-balloon__avatar {
	display: grid;
	width: 54px;
	height: 54px;
	flex: 0 0 54px;
	overflow: hidden;
	place-items: center;
	border-radius: 50%;
	background: var(--ds-main);
	color: var(--ds-white);
	font-size: .78rem;
	font-weight: 700;
}

.ds-balloon__avatar img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.ds-balloon__body {
	position: relative;
	flex: 1;
	padding: 16px 18px;
	border: 1px solid var(--ds-border);
	border-radius: var(--ds-radius);
	background: var(--ds-sub);
}

.ds-balloon__body::before {
	position: absolute;
	top: 18px;
	left: -8px;
	width: 14px;
	height: 14px;
	transform: rotate(45deg);
	border-bottom: 1px solid var(--ds-border);
	border-left: 1px solid var(--ds-border);
	background: var(--ds-sub);
	content: "";
}

.ds-balloon--right .ds-balloon__body::before {
	right: -8px;
	left: auto;
	transform: rotate(225deg);
}

.ds-balloon__body > *:last-child {
	margin-bottom: 0;
}

.ds-expert {
	display: grid;
	gap: 18px;
	margin: 2em 0;
	padding: 22px;
	border: 1px solid var(--ds-border);
	border-top: 5px solid var(--ds-main);
	background: var(--ds-sub);
}

.ds-expert__photo {
	width: 88px;
	height: 88px;
	overflow: hidden;
	border-radius: 50%;
	background: #e2e8f0;
}

.ds-expert__photo img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.ds-expert__label {
	margin: 0;
	color: var(--ds-accent-dark);
	font-size: .7rem;
	font-weight: 800;
	letter-spacing: .1em;
}

.ds-expert__name {
	margin: 3px 0 8px !important;
	font-size: 1.1rem;
	font-weight: 800;
}

.ds-expert__body > *:last-child {
	margin-bottom: 0;
}

.ds-column-cta {
	position: relative;
	margin: 2.4em 0;
	padding: 28px 22px;
	overflow: hidden;
	border: 1px solid var(--ds-accent);
	border-radius: var(--ds-radius);
	background:
		linear-gradient(90deg, rgba(255, 255, 255, .08) 1px, transparent 1px),
		linear-gradient(rgba(255, 255, 255, .08) 1px, transparent 1px),
		var(--ds-accent-dark);
	background-size: 24px 24px;
	color: var(--ds-white);
	text-align: center;
}

.ds-column-cta__title {
	margin: 0 0 10px !important;
	padding: 0 !important;
	border: 0 !important;
	background: none !important;
	color: var(--ds-white);
	font-size: 1.35rem !important;
}

.ds-column-cta p {
	color: #e0f2fe;
}

.ds-column-cta__button {
	display: inline-flex;
	min-height: 48px;
	align-items: center;
	justify-content: center;
	padding: 11px 20px;
	border: 2px solid var(--ds-white);
	border-radius: var(--ds-radius);
	background: var(--ds-white);
	color: var(--ds-accent-dark) !important;
	font-weight: 800;
	text-decoration: none;
}

.ds-column-cta__button:hover {
	background: var(--ds-main-deep);
	color: var(--ds-white) !important;
}

@media (min-width: 640px) {
	.ds-related-card {
		grid-template-columns: 180px 1fr;
		align-items: center;
	}

	.ds-expert {
		grid-template-columns: 100px 1fr;
	}
}

@media (min-width: 768px) {
	.ds-point,
	.ds-warning,
	.ds-checklist {
		padding: 28px 30px;
	}

	.ds-column-cta {
		padding: 38px;
	}
}

@media (min-width: 1024px) {
	.ds-article__content {
		font-size: 1.03rem;
	}
}

@media (min-width: 1280px) {
	.ds-article__content {
		font-size: 1.05rem;
	}
}

@media (prefers-reduced-motion: reduce) {
	.ds-toc__item a {
		scroll-behavior: auto;
	}
}

/* Batch 2 article decoration and standalone preview refinements. */
.ds-article__content h4 {
	position: relative;
	padding-left: 1.05em;
}

.ds-article__content h4::before {
	position: absolute;
	top: .72em;
	left: 0;
	width: .5em;
	height: .5em;
	border-radius: 50%;
	background: var(--color-accent);
	content: "";
}

.ds-article__content a {
	color: #0369a1;
	text-decoration-color: rgba(3, 105, 161, .45);
	text-underline-offset: 3px;
}

.ds-article__content a:hover {
	text-decoration-color: currentColor;
	text-decoration-thickness: 2px;
}

.ds-article__content strong {
	color: var(--color-main);
	font-weight: 800;
}

.ds-article__content em {
	padding-inline: .08em;
	background: linear-gradient(transparent 62%, rgba(14, 165, 233, .25) 62%);
	color: var(--color-text);
	font-style: normal;
	font-weight: 700;
}

.ds-article__content ul:not([class]) li::marker,
.ds-article__content ol:not([class]) li::marker {
	color: var(--color-main);
	font-weight: 800;
}

.ds-article__content blockquote:not([class]) {
	border-left: 6px solid var(--color-main);
	font-style: italic;
}

.ds-article__content blockquote:not([class]) > *:last-child {
	margin-bottom: 0;
}

.ds-article__content pre {
	margin: 2em 0;
	padding: 20px;
	overflow-x: auto;
	border: 1px solid #334155;
	border-radius: var(--ds-radius);
	background: #0f172a;
	color: #e2e8f0;
	font: .88rem/1.75 Consolas, Monaco, "Courier New", monospace;
	white-space: pre;
	-webkit-overflow-scrolling: touch;
}

.ds-article__content code {
	padding: .12em .35em;
	border-radius: 3px;
	background: #e2e8f0;
	color: #9f1239;
	font-family: Consolas, Monaco, "Courier New", monospace;
	font-size: .9em;
}

.ds-article__content pre code {
	padding: 0;
	background: transparent;
	color: inherit;
	font-size: inherit;
}

.ds-article__content figure {
	margin: 2em 0;
}

.ds-article__content figcaption {
	margin-top: 10px;
	color: var(--ds-muted);
	font-size: .78rem;
	line-height: 1.6;
	text-align: center;
}

.ds-point,
.ds-warning {
	border-left: 6px solid var(--color-main);
}

.ds-point::before {
	background: var(--color-main);
}

.ds-warning {
	border-left-color: var(--ds-warning);
}

.ds-warning::before {
	content: "⚠ 注意";
}

.ds-checklist__items li::before {
	border-color: var(--color-accent);
}

.ds-checklist__items li::after {
	border-bottom-color: var(--color-accent);
	border-left-color: var(--color-accent);
}

.ds-faq__question::before,
.ds-faq__answer::before {
	top: 13px;
	left: 14px;
	display: grid;
	width: 28px;
	height: 28px;
	place-items: center;
	border-radius: 50%;
	background: var(--color-main);
	color: var(--ds-white);
	font-size: .88rem;
}

.ds-faq__answer::before {
	background: var(--color-accent);
	color: var(--ds-white);
}

.ds-related-card__meta {
	display: flex;
	flex-wrap: wrap;
	gap: 6px 12px;
	margin-bottom: 6px;
	color: var(--ds-muted);
	font-family: Inter, "Segoe UI", sans-serif;
	font-size: .68rem;
}

.ds-related-card__category {
	padding: 1px 6px;
	background: #e0f2fe;
	color: #0369a1;
	font-family: "Noto Sans JP", "Yu Gothic", sans-serif;
	font-weight: 700;
}

.ds-related-card__date {
	align-self: center;
}

.ds-expert__social {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	margin-top: 12px;
}

.ds-expert__social a {
	display: inline-flex;
	min-height: 34px;
	align-items: center;
	padding: 5px 11px;
	border: 1px solid var(--color-border);
	border-radius: 999px;
	background: var(--ds-white);
	font-size: .75rem;
	font-weight: 700;
	text-decoration: none;
}

.ds-column-cta {
	border-color: var(--color-main);
	background:
		linear-gradient(90deg, rgba(255, 255, 255, .08) 1px, transparent 1px),
		linear-gradient(rgba(255, 255, 255, .08) 1px, transparent 1px),
		var(--color-main);
	background-size: 24px 24px;
}

.ds-column-cta__button {
	border-color: var(--color-accent);
	background: var(--color-accent);
	color: var(--ds-white) !important;
}

.ds-column-cta__button:hover {
	border-color: var(--ds-white);
	background: var(--ds-white);
	color: var(--color-main) !important;
}

.ds-dummy-body {
	margin: 0;
	background: #e2e8f0;
	color: var(--color-text);
	font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
	line-height: 1.8;
	-webkit-font-smoothing: antialiased;
}

.ds-dummy-body,
.ds-dummy-body * {
	box-sizing: border-box;
}

.ds-dummy-shell {
	width: min(calc(100% - 28px), 920px);
	margin: 32px auto;
	padding: 24px 18px 56px;
	border: 1px solid var(--color-border);
	border-radius: var(--ds-radius);
	background: var(--ds-white);
	box-shadow: var(--ds-shadow);
}

.ds-dummy-breadcrumb {
	margin: 0 0 28px;
	padding-bottom: 12px;
	overflow-x: auto;
	border-bottom: 1px solid var(--color-border);
	color: var(--ds-muted);
	font-size: .72rem;
	white-space: nowrap;
}

.ds-dummy-breadcrumb a {
	color: var(--color-main);
	text-decoration: none;
}

.ds-dummy-breadcrumb span::before {
	margin-inline: 8px;
	color: var(--color-border);
	content: "/";
}

.ds-dummy-header {
	margin-bottom: 30px;
}

.ds-dummy-category {
	display: inline-block;
	margin-bottom: 12px;
	padding: 4px 9px;
	background: #e0f2fe;
	color: #0369a1;
	font-size: .72rem;
	font-weight: 800;
}

.ds-dummy-title {
	margin: 0 0 16px;
	font-size: clamp(1.7rem, 6vw, 2.8rem);
	line-height: 1.42;
	letter-spacing: -.025em;
}

.ds-dummy-meta {
	display: flex;
	flex-wrap: wrap;
	gap: 8px 18px;
	color: var(--ds-muted);
	font-family: Inter, "Segoe UI", sans-serif;
	font-size: .72rem;
}

.ds-dummy-eyecatch {
	width: 100%;
	aspect-ratio: 1200 / 630;
	object-fit: cover;
}

.ds-dummy-related-grid {
	display: grid;
	gap: 14px;
	margin-top: 1.5em;
}

.ds-dummy-note {
	margin-top: 48px;
	padding: 14px 16px;
	border: 1px dashed var(--color-border);
	background: var(--color-sub);
	color: var(--ds-muted);
	font-size: .78rem;
}

@media (min-width: 640px) {
	.ds-dummy-shell {
		padding: 42px 52px 72px;
	}

	.ds-dummy-related-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

@media (prefers-reduced-motion: reduce) {
	.ds-article__content *,
	.ds-dummy-body * {
		scroll-behavior: auto !important;
		transition-duration: .01ms !important;
		animation-duration: .01ms !important;
	}
}