/* portal/css/blog-article.css — shared blog/article layer on the agentic design system.

   Load order on every blog page: octen.css → agentic.css → blog-article.css.
   This file only carries what agentic.css does NOT: article chrome
   (breadcrumb / language pill / meta / tags), the readable prose column,
   the epistemic components (claim-box, prov, term-block, ledger tables,
   stat tiles, ladders, steps, volumes, stale markers), the connections
   article figures, author/related/prev-next footer blocks, the blog index
   card list, and zh-CN typography. Colors and type come from the
   octen/agentic tokens (--accent, --bg-card, --border, --text-secondary,
   --font-mono, --ag-*) — nothing is redefined here. */

/* ── Article shell: breadcrumb + language switcher ── */
.ba-article {
	padding-top: calc(var(--global-nav-height, var(--gn-h, 44px)) + 14px);
}
.ba-topbar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 0.75rem;
	max-width: 1120px;
	margin: 0 auto;
	padding: 0.75rem 2rem 0;
	font-size: 0.8125rem;
	color: var(--text-muted);
}
.ba-crumb a {
	color: var(--text-secondary);
	text-decoration: none;
}
.ba-crumb a:hover {
	color: var(--accent);
}
.ba-crumb .ba-crumb-cat {
	color: var(--text-secondary);
}
.ba-lang {
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	border: 1px solid var(--border);
	border-radius: 999px;
	padding: 0.4rem 0.85rem;
	color: var(--text-secondary);
	background: var(--bg-card);
	font-family: var(--font-mono);
	font-size: 0.76rem;
	white-space: nowrap;
	text-decoration: none;
}
.ba-lang:hover {
	border-color: var(--border-hover);
	color: var(--accent);
}

/* ── Article hero: ag-hero tuned down for long titles ── */
.ba-hero {
	padding-top: 4rem;
	padding-bottom: 4rem;
}
.ba-hero h1 {
	font-size: clamp(2.1rem, 5vw, 3.6rem);
	letter-spacing: -0.04em;
}
.ba-hero .ba-meta {
	margin-top: 1.5rem;
	color: var(--text-muted);
	font-family: var(--font-mono);
	font-size: 0.8rem;
}
.ba-tags {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 0.5rem;
	margin: 1.25rem 0 0;
	padding: 0;
	list-style: none;
}
.ba-tags a {
	display: inline-flex;
	align-items: center;
	border: 1px solid var(--border);
	border-radius: 999px;
	padding: 0.35rem 0.75rem;
	color: var(--text-secondary);
	background: var(--bg-card);
	font-family: var(--font-mono);
	font-size: 0.76rem;
	text-decoration: none;
}
.ba-tags a:hover {
	border-color: var(--border-hover);
	color: var(--accent);
}

/* ── Readable prose column ── */
.ba-prose {
	max-width: 760px;
	margin-inline: auto;
}
.ba-main > .lede {
	max-width: 760px;
	margin: 3.5rem auto 0;
	padding: 0 2rem;
	color: var(--text-primary);
	font-size: clamp(1.05rem, 1.6vw, 1.25rem);
	line-height: 1.8;
	text-align: center;
}
/* Long-form sections: text blocks read at 760px, wide components
   (tables, stat rows, ladders, steps, card grids) keep the container. */
.ba-main > .claim-box,
.ba-main .ag-section .container > p,
.ba-main .ag-section .container > h3,
.ba-main .ag-section .container > ul,
.ba-main .ag-section .container > ol,
.ba-main .ag-section .container > blockquote,
.ba-main .ag-section .container > .claim-box,
.ba-main .ag-section .container > .evidence-boundary,
.ba-main .ag-section .container > .article-thesis,
.ba-main .ag-section .container > .prov,
.ba-main .ag-section .container > .term-block {
	max-width: 760px;
	margin-inline: auto;
}
.ba-main .ag-section .container > p,
.ba-prose p {
	margin-top: 0;
	margin-bottom: 1.4rem;
	line-height: 1.85;
}
.ba-main .ag-section .container > h3,
.ba-prose h3 {
	margin: 2.2rem auto 0.9rem;
	font-size: 1.15rem;
	line-height: 1.4;
}
.ba-main .ag-section .container > ul,
.ba-main .ag-section .container > ol,
.ba-prose ul,
.ba-prose ol {
	margin: 0 auto 1.4rem;
	padding-left: 1.4rem;
	list-style: disc;
}
.ba-main .ag-section .container > ol,
.ba-prose ol {
	list-style: decimal;
}
.ba-main .ag-section .container > ul > li,
.ba-main .ag-section .container > ol > li,
.ba-prose li {
	margin-bottom: 0.5rem;
	line-height: 1.8;
}
.ba-main .ag-section .container > ul > li::marker,
.ba-main .ag-section .container > ol > li::marker,
.ba-prose li::marker {
	color: var(--accent);
}
/* Component lists keep their own geometry. */
.ba-main .ag-section .container > ol.steps,
.ba-main .ag-section .container > ol.recursion-list,
.ba-prose ol.steps {
	max-width: none;
	padding-left: 0;
	list-style: none;
}

/* ── Short-article h2/h3 rhythm (no ag-section wrapper) ── */
.ba-prose {
	padding: 0 2rem;
}
.ba-prose h2 {
	margin: 3rem 0 1.1rem;
	padding-top: 0.5rem;
	font-size: 1.6rem;
	letter-spacing: -0.02em;
	line-height: 1.25;
}
.ba-prose h2::before {
	content: "";
	display: block;
	width: 40px;
	height: 3px;
	margin-bottom: 0.9rem;
	border-radius: 2px;
	background: var(--accent);
}

/* ── Code, pre, tables in prose ── */
.ba-main code,
.ba-prose code {
	font-family: var(--font-mono);
	font-size: 0.88em;
	background: var(--bg-tertiary);
	border: 1px solid var(--border);
	border-radius: 4px;
	padding: 2px 6px;
	color: #7dd3fc;
}
.ba-main pre,
.ba-prose pre {
	margin: 0 0 1.4rem;
	border: 1px solid var(--border);
	border-radius: 0.75rem;
	padding: 1rem 1.15rem;
	overflow-x: auto;
	background: #0a0f16;
	font-family: var(--font-mono);
	font-size: 0.82rem;
	line-height: 1.65;
}
.ba-main pre code,
.ba-prose pre code {
	background: none;
	border: none;
	padding: 0;
	color: #c9d1d9;
}
.ba-prose table {
	width: 100%;
	margin: 0 0 1.4rem;
	border-collapse: collapse;
	font-size: 0.9rem;
}
.ba-prose th,
.ba-prose td {
	padding: 0.6rem 0.85rem;
	border-bottom: 1px solid var(--border);
	text-align: left;
	vertical-align: top;
}
.ba-prose th {
	color: var(--accent);
	background: var(--bg-card);
	font-family: var(--font-mono);
	font-size: 0.72rem;
	letter-spacing: 0.05em;
	text-transform: uppercase;
}
.ba-prose td {
	color: var(--text-secondary);
	line-height: 1.6;
}
.ba-prose blockquote {
	margin: 1.5rem 0;
	border-left: 3px solid var(--accent);
	border-radius: 0 0.75rem 0.75rem 0;
	padding: 1rem 1.15rem;
	background: var(--accent-glow);
	color: var(--text-secondary);
}

/* ── Claim boxes: fact / inference / analogy / thesis ── */
.claim-box {
	border: 1px solid var(--border);
	border-left: 3px solid var(--accent);
	border-radius: 0 1rem 1rem 0;
	padding: 1.15rem 1.25rem;
	margin: 1.6rem 0;
	background: var(--bg-card);
}
.claim-label {
	display: inline-block;
	margin-bottom: 0.45rem;
	font-family: var(--font-mono);
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}
.claim-box[data-claim-type="fact"] {
	border-left-color: var(--ag-safe);
}
.claim-box[data-claim-type="fact"] .claim-label {
	color: var(--ag-safe);
}
.claim-box[data-claim-type="inference"] {
	border-left-color: var(--ag-control);
}
.claim-box[data-claim-type="inference"] .claim-label {
	color: var(--ag-control);
}
.claim-box[data-claim-type="analogy"] {
	border-left-color: var(--ag-sdr);
}
.claim-box[data-claim-type="analogy"] .claim-label {
	color: var(--ag-sdr);
}
.claim-box[data-claim-type="thesis"] {
	border-left-color: var(--ag-edge);
}
.claim-box[data-claim-type="thesis"] .claim-label {
	color: var(--ag-edge);
}

/* ── prov: the minimum evidence record under a claim ── */
.prov {
	border-left: 3px solid var(--border);
	border-radius: 0 0.75rem 0.75rem 0;
	padding: 0.85rem 1rem;
	margin: 0.9rem 0 1.75rem;
	background: rgba(255, 255, 255, 0.015);
	color: var(--text-secondary);
	font-family: var(--font-mono);
	font-size: 0.74rem;
	line-height: 1.7;
}
.prov b {
	color: var(--text-primary);
	font-weight: 600;
}

/* ── Ledger tables and stat tiles ── */
.ledger-scroll {
	overflow-x: auto;
	border: 1px solid var(--border);
	border-radius: 1rem;
	background: rgba(255, 255, 255, 0.015);
	-webkit-overflow-scrolling: touch;
}
.ledger-table {
	min-width: 860px;
	width: 100%;
	margin: 0;
	border-collapse: collapse;
	font-size: 0.84rem;
}
.ledger-table th,
.ledger-table td {
	border-bottom: 1px solid var(--border);
	padding: 0.85rem 1rem;
	text-align: left;
	vertical-align: top;
}
.ledger-table th {
	color: var(--accent);
	background: var(--bg-card);
	font-family: var(--font-mono);
	font-size: 0.72rem;
	letter-spacing: 0.04em;
	text-transform: uppercase;
}
.ledger-table td {
	color: var(--text-secondary);
	line-height: 1.55;
}
.ledger-table td.num,
.ledger-table td.tool {
	font-family: var(--font-mono);
	white-space: nowrap;
}
.ledger-table td.num {
	text-align: right;
}
.ledger-table tr.total td {
	background: rgba(34, 211, 238, 0.04);
	font-weight: 700;
}
.ledger-table tr:last-child td {
	border-bottom: 0;
}
.ledger-table caption {
	caption-side: bottom;
	padding: 0.75rem 1rem 1rem;
	color: var(--text-secondary);
	font-size: 0.78rem;
	line-height: 1.6;
	text-align: left;
}
.stat-row {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: 1.25rem;
	margin: 2rem 0;
}
.stat-tile {
	border: 1px solid var(--border);
	border-top: 3px solid var(--ag-control);
	border-radius: 1rem;
	padding: 1.25rem 1.35rem;
	background: var(--bg-card);
}
.stat-tile:nth-child(2) {
	border-top-color: var(--ag-sdr);
}
.stat-tile:nth-child(3) {
	border-top-color: var(--ag-edge);
}
.stat-num {
	display: block;
	color: var(--accent);
	font-family: var(--font-mono);
	font-size: clamp(1.45rem, 3vw, 2rem);
	font-weight: 700;
	line-height: 1.2;
}
.stat-cap {
	display: block;
	margin-top: 0.45rem;
	color: var(--text-secondary);
	font-size: 0.82rem;
	line-height: 1.55;
}

/* ── term-block: reproducible command + real output ── */
.term-block {
	margin: 1.75rem 0;
	border: 1px solid var(--border);
	border-radius: 1rem;
	overflow: hidden;
	background: #06090d;
}
.term-head {
	padding: 0.55rem 0.85rem;
	border-bottom: 1px solid var(--border);
	color: var(--text-secondary);
	font-family: var(--font-mono);
	font-size: 0.7rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}
.term-block pre {
	margin: 0;
	border: 0;
	border-radius: 0;
	padding: 1rem;
	overflow-x: auto;
	background: none;
	font-family: var(--font-mono);
	font-size: 0.8rem;
	line-height: 1.55;
}
.term-block .exit {
	color: var(--ag-safe);
}
.term-block .block-line {
	color: var(--ag-danger);
}

/* ── Volumes: the long articles' movement wrappers ── */
.volume {
	margin-top: 4rem;
}
.volume-head {
	max-width: 900px;
	margin: 0 auto;
	padding: 0 2rem 2.75rem;
	text-align: center;
}
.volume-head .volume-num {
	display: block;
	margin-bottom: 0.75rem;
	color: var(--accent);
	font-family: var(--font-mono);
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
}
.volume-head h2 {
	margin: 0;
	font-size: clamp(1.8rem, 4vw, 2.6rem);
	letter-spacing: -0.03em;
}
.volume-head .volume-gloss {
	max-width: 760px;
	margin: 0.85rem auto 0;
	color: var(--text-secondary);
	font-size: 0.98rem;
	line-height: 1.75;
}
.volume[data-volume="gewu"] .volume-head .volume-num {
	color: var(--ag-sdr);
}
.volume[data-volume="zhizhi"] .volume-head .volume-num {
	color: var(--ag-control);
}
.volume[data-volume="zhixing"] .volume-head .volume-num {
	color: var(--ag-edge);
}

/* ── stale: a superseded number, quoted only to be struck through ── */
del.stale {
	font-family: var(--font-mono);
	color: var(--ag-danger);
	text-decoration: line-through;
	text-decoration-thickness: 1px;
	opacity: 0.85;
	white-space: nowrap;
}
.stale-pair {
	font-family: var(--font-mono);
	font-size: 0.86rem;
	white-space: nowrap;
}
.stale-pair .arrow {
	margin: 0 0.35rem;
	color: var(--text-secondary);
}

/* ── Ladders: the two evidence ladders that must not cross ── */
.ladder-pair {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 1.25rem;
	margin: 2rem 0;
}
.ladder {
	border: 1px solid var(--border);
	border-radius: 1rem;
	padding: 1.35rem;
	background: var(--bg-card);
}
.ladder--product {
	border-top: 3px solid var(--ag-safe);
}
.ladder--process {
	border-top: 3px solid var(--ag-control);
}
.ladder h4 {
	margin: 0 0 0.6rem;
}
.ladder ol {
	margin: 0;
	padding-left: 1.2rem;
	list-style: decimal;
	font-size: 0.85rem;
	line-height: 1.85;
}
.ladder code {
	font-family: var(--font-mono);
	font-size: 0.8rem;
}
.ladder-note {
	grid-column: 1 / -1;
	border-left: 3px solid var(--ag-edge);
	border-radius: 0 0.75rem 0.75rem 0;
	padding: 1rem 1.15rem;
	background: var(--ag-edge-glow);
	color: var(--text-secondary);
}

/* ── steps: numbered playbook cards ── */
.steps {
	counter-reset: step;
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 1.25rem;
	margin: 2rem 0;
	padding: 0;
	list-style: none;
}
.steps li {
	counter-increment: step;
	position: relative;
	min-height: 100%;
	margin: 0;
	padding: 1.35rem 1.35rem 1.35rem 4rem;
	border: 1px solid var(--border);
	border-top: 3px solid var(--ag-control);
	border-radius: 1rem;
	background: var(--bg-card);
}
.steps li::before {
	content: counter(step);
	position: absolute;
	top: 1.25rem;
	left: 1.25rem;
	display: grid;
	place-items: center;
	width: 2rem;
	height: 2rem;
	border: 1px solid var(--accent);
	border-radius: 0.55rem;
	background: var(--accent-glow);
	color: var(--accent);
	font-family: var(--font-mono);
	font-weight: 700;
}
.steps h4 {
	margin: 0 0 0.45rem;
	font-size: 1rem;
}
.steps p {
	margin: 0;
	color: var(--text-secondary);
	font-size: 0.9rem;
	line-height: 1.65;
}

/* ── connections article figures ── */
.connection-diagram {
	margin: 2rem 0;
	border: 1px solid var(--border);
	border-radius: 1rem;
	padding: 1rem;
	overflow: hidden;
	background: rgba(255, 255, 255, 0.015);
}
.connection-svg {
	display: block;
	width: 100%;
	height: auto;
}
.connection-svg text {
	font-family: var(--font-sans);
}
.scale-ladder {
	display: grid;
	grid-template-columns: repeat(5, minmax(0, 1fr));
	gap: 0.8rem;
	margin: 1.5rem 0;
}
.scale-step {
	position: relative;
	border: 1px solid var(--border);
	border-top: 3px solid var(--accent);
	border-radius: 0.75rem;
	padding: 1rem;
	background: var(--bg-card);
}
.scale-step strong {
	display: block;
	margin-bottom: 0.4rem;
}
.scale-step span {
	color: var(--text-secondary);
	font-size: 0.82rem;
	line-height: 1.45;
}
.connection-table-wrap {
	overflow-x: auto;
	margin: 1.5rem 0;
	border: 1px solid var(--border);
	border-radius: 0.85rem;
}
.connection-table {
	min-width: 900px;
	width: 100%;
	border-collapse: collapse;
	font-size: 0.84rem;
}
.connection-table th,
.connection-table td {
	border-bottom: 1px solid var(--border);
	padding: 0.8rem 1rem;
	text-align: left;
	vertical-align: top;
}
.connection-table th {
	color: var(--accent);
	background: var(--bg-card);
	font-family: var(--font-mono);
	font-size: 0.72rem;
	letter-spacing: 0.04em;
	text-transform: uppercase;
}
.connection-table td {
	color: var(--text-secondary);
	line-height: 1.55;
}
.connection-table tr:last-child td {
	border-bottom: 0;
}
.evidence-boundary {
	border: 1px solid var(--ag-sdr);
	border-radius: 0.8rem;
	padding: 1.1rem;
	margin: 1.5rem 0;
	background: var(--ag-sdr-glow);
	color: var(--text-secondary);
	line-height: 1.7;
}
.evidence-boundary strong {
	color: var(--ag-warning);
}
.article-thesis {
	margin: 2rem 0;
	border: 1px solid rgba(167, 139, 250, 0.45);
	border-radius: 1rem;
	padding: 1.5rem;
	background: var(--ag-edge-glow);
	font-size: 1.05rem;
	line-height: 1.75;
}
.recursion-list {
	counter-reset: recursion;
	padding: 0;
	list-style: none;
}
.recursion-list li {
	counter-increment: recursion;
	display: flex;
	gap: 0.9rem;
	align-items: flex-start;
	margin: 0 0 0.9rem;
	border: 1px solid var(--border);
	border-radius: 0.75rem;
	padding: 1rem;
	background: var(--bg-card);
}
.recursion-list li::before {
	content: counter(recursion);
	display: grid;
	place-items: center;
	flex: 0 0 2rem;
	height: 2rem;
	border-radius: 50%;
	color: var(--accent);
	background: var(--accent-glow);
	font-family: var(--font-mono);
	font-weight: 700;
}
.citation {
	margin-left: 0.12em;
	color: var(--accent);
	font-size: 0.78em;
	vertical-align: super;
	text-decoration: none;
}
.citation:hover,
.citation:focus-visible {
	text-decoration: underline;
}
.references-list li {
	margin-bottom: 0.8rem;
	line-height: 1.6;
	scroll-margin-top: 6rem;
}
.references-list a {
	overflow-wrap: anywhere;
}

/* ── Article footer: author card, related reading, prev/next ── */
.ba-footer {
	padding: 2rem 2rem 6rem;
}
.ba-footer-inner {
	max-width: 760px;
	margin: 0 auto;
}
.blog-author {
	display: flex;
	gap: 18px;
	align-items: flex-start;
	margin: 0 0 2.5rem;
	padding: 1.5rem;
	border: 1px solid var(--border);
	border-radius: 1rem;
	background: var(--bg-card);
}
.blog-author .ba-icon {
	display: flex;
	align-items: center;
	justify-content: center;
	flex-shrink: 0;
	width: 48px;
	height: 48px;
	border-radius: 50%;
	background: var(--accent-glow);
	color: var(--accent);
	font-size: 1.3rem;
}
.blog-author h3 {
	margin: 0 0 6px;
	font-size: 1rem;
}
.blog-author p {
	margin: 0;
	color: var(--text-secondary);
	font-size: 0.88rem;
	line-height: 1.6;
}
.blog-related {
	margin-bottom: 2rem;
}
.blog-related h3 {
	margin-bottom: 1rem;
	font-size: 1.05rem;
}
.blog-related ul {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 12px;
	margin: 0;
	padding: 0;
	list-style: none;
}
.blog-related li a {
	display: block;
	padding: 14px 16px;
	border: 1px solid var(--border);
	border-radius: 0.75rem;
	color: var(--text-primary);
	font-size: 0.92rem;
	text-decoration: none;
	transition: all 0.2s;
}
.blog-related li a:hover {
	border-color: var(--border-hover);
	color: var(--accent);
	transform: translateY(-2px);
}
.blog-prevnext {
	display: flex;
	justify-content: space-between;
	gap: 16px;
	font-size: 0.9rem;
}
.blog-prevnext a {
	color: var(--text-secondary);
	text-decoration: none;
}
.blog-prevnext a:hover {
	color: var(--accent);
}

/* ── Blog index: filter pills + article card grid ── */
.blog-cat-filter {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	justify-content: center;
	margin-bottom: 2.5rem;
}
.blog-cat-filter button {
	border: 1px solid var(--border);
	border-radius: 999px;
	padding: 6px 16px;
	color: var(--text-secondary);
	background: none;
	font-size: 0.82rem;
	cursor: pointer;
	transition: all 0.2s;
}
.blog-cat-filter button:hover {
	border-color: var(--border-hover);
	color: var(--accent);
}
.blog-cat-filter button.is-active {
	border-color: var(--accent);
	color: var(--accent);
	background: var(--accent-glow);
}
.ba-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 1.25rem;
}
.blog-card {
	display: flex;
	flex-direction: column;
	transition: all 0.25s;
}
.blog-card:hover {
	border-color: var(--border-hover);
	transform: translateY(-3px);
}
.blog-card .bc-cat {
	margin-bottom: 10px;
	color: var(--accent);
	font-family: var(--font-mono);
	font-size: 0.72rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}
.blog-card h2 {
	margin: 0 0 10px;
	font-size: 1.25rem;
	font-weight: 600;
	line-height: 1.4;
}
.blog-card h2 a {
	color: var(--text-primary);
	text-decoration: none;
}
.blog-card h2 a:hover {
	color: var(--accent);
}
.blog-card .bc-excerpt {
	flex: 1;
	margin-bottom: 16px;
	color: var(--text-secondary);
	font-size: 0.9rem;
	line-height: 1.65;
}
.blog-card .bc-meta {
	color: var(--text-muted);
	font-family: var(--font-mono);
	font-size: 0.8rem;
}

/* ── Anchored headings clear the fixed nav + sticky anchor rail ── */
section[id],
h1[id],
h2[id],
h3[id],
.volume-head {
	scroll-margin-top: calc(var(--global-nav-height, 44px) + 64px);
}

/* ── zh-CN typography: CJK fonts + generous line-height, mono stays mono ── */
html:lang(zh-CN) .ba-article,
html:lang(zh-CN) .ba-footer {
	font-family:
		"PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Source Han Sans SC",
		"Microsoft YaHei", var(--font-sans), sans-serif;
}
html:lang(zh-CN) .ba-main,
html:lang(zh-CN) .ba-prose {
	line-height: 2;
	letter-spacing: 0.01em;
}
html:lang(zh-CN) .ba-main .ag-section .container > p,
html:lang(zh-CN) .ba-main .ag-section .container > ul > li,
html:lang(zh-CN) .ba-main .ag-section .container > ol > li,
html:lang(zh-CN) .ba-prose p,
html:lang(zh-CN) .ba-prose li {
	line-height: 2;
}
html:lang(zh-CN) .ba-hero p,
html:lang(zh-CN) .ba-crumb,
html:lang(zh-CN) .ba-tags a {
	line-height: 1.85;
}
html:lang(zh-CN) .ba-article code,
html:lang(zh-CN) .ba-article pre,
html:lang(zh-CN) .term-block,
html:lang(zh-CN) .prov,
html:lang(zh-CN) .ledger-table td.num,
html:lang(zh-CN) .ledger-table td.tool,
html:lang(zh-CN) .stat-num,
html:lang(zh-CN) .stale-pair,
html:lang(zh-CN) del.stale {
	font-family: var(--font-mono);
}

/* ── Responsive ── */
@media (max-width: 900px) {
	.ba-hero {
		padding: 3rem 1.25rem 3rem;
	}
	.ba-topbar {
		padding-inline: 1.25rem;
	}
	.ba-main > .lede,
	.ba-prose {
		padding-inline: 1.25rem;
	}
	.steps {
		grid-template-columns: 1fr;
	}
	.scale-ladder {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
	.ba-grid {
		grid-template-columns: 1fr;
	}
	.blog-related ul {
		grid-template-columns: 1fr;
	}
}

@media (max-width: 640px) {
	.volume {
		margin-top: 3rem;
	}
	.volume-head h2 {
		font-size: 1.5rem;
	}
	.ledger-table {
		font-size: 0.78rem;
	}
	.ledger-table th,
	.ledger-table td {
		padding: 0.55rem 0.65rem;
	}
	.steps li {
		padding: 1.2rem 1.2rem 1.2rem 3.75rem;
	}
	.scale-ladder {
		grid-template-columns: 1fr;
	}
	.claim-box {
		padding: 0.9rem;
	}
	.connection-diagram {
		padding: 0.5rem;
	}
	.blog-author {
		flex-direction: column;
	}
	html:lang(zh-CN) .ba-main,
	html:lang(zh-CN) .ba-prose {
		line-height: 1.9;
	}
}

@media (prefers-reduced-motion: reduce) {
	.blog-card,
	.blog-related li a,
	.blog-cat-filter button {
		transition: none;
	}
}

/* ── Distillation layer: TL;DR card, reading path, volume/section takeaways ── */
.ba-tldr {
	max-width: 1120px;
	margin: 0 auto 2.75rem;
	padding: 0 2rem;
}
.ba-tldr-card {
	border: 1px solid var(--border);
	border-left: 3px solid var(--accent);
	border-radius: 0 1rem 1rem 0;
	padding: 1.35rem 1.5rem 1.2rem;
	background: var(--bg-card);
}
.ba-tldr-title {
	margin: 0 0 1rem;
	font-family: var(--font-mono);
	font-size: 0.78rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--accent);
}
.ba-tldr-title i {
	margin-right: 0.45rem;
}
.ba-tldr-list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	gap: 0.75rem;
	counter-reset: tldr;
}
.ba-tldr-list li {
	counter-increment: tldr;
	position: relative;
	padding-left: 2.35rem;
	margin: 0;
	color: var(--text-secondary);
	line-height: 1.65;
}
.ba-tldr-list li::before {
	content: counter(tldr, decimal-leading-zero);
	position: absolute;
	left: 0;
	top: 0.12em;
	font-family: var(--font-mono);
	font-size: 0.78rem;
	font-weight: 700;
	color: var(--accent);
}
.ba-tldr-list strong {
	color: var(--text-primary);
}
.ba-tldr-tag {
	display: inline-block;
	margin-right: 0.5rem;
	padding: 0.05rem 0.55rem;
	border: 1px solid currentColor;
	border-radius: 999px;
	font-family: var(--font-mono);
	font-size: 0.68rem;
	font-weight: 700;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	vertical-align: 0.1em;
}
.ba-tldr-tag[data-claim-type="fact"] {
	color: var(--ag-safe);
}
.ba-tldr-tag[data-claim-type="inference"] {
	color: var(--ag-control);
}
.ba-tldr-tag[data-claim-type="thesis"] {
	color: var(--ag-edge);
}
.ba-readpath {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.5rem;
	margin-top: 1.15rem;
	padding-top: 1rem;
	border-top: 1px dashed var(--border);
	font-size: 0.82rem;
	color: var(--text-muted);
}
.ba-readpath a {
	padding: 0.22rem 0.8rem;
	border: 1px solid var(--border);
	border-radius: 999px;
	color: var(--text-secondary);
	text-decoration: none;
	background: var(--bg-tertiary);
	transition: border-color 0.15s ease, color 0.15s ease;
}
.ba-readpath a:hover {
	border-color: var(--accent);
	color: var(--accent);
}
.volume-takeaway,
.section-takeaway {
	display: flex;
	align-items: flex-start;
	gap: 0.85rem;
	margin: 1.75rem 0 0;
	padding: 0.95rem 1.15rem;
	border: 1px solid var(--border);
	border-left: 3px solid var(--accent);
	border-radius: 0 0.75rem 0.75rem 0;
	background: var(--bg-tertiary);
}
.volume-takeaway .tk-label,
.section-takeaway .tk-label {
	flex-shrink: 0;
	padding-top: 0.18rem;
	font-family: var(--font-mono);
	font-size: 0.7rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--accent);
	white-space: nowrap;
}
.volume-takeaway p,
.section-takeaway p,
.section-takeaway ol {
	margin: 0;
	color: var(--text-secondary);
	line-height: 1.7;
}
.section-takeaway ol {
	padding-left: 1.15rem;
	display: grid;
	gap: 0.4rem;
}
@media (max-width: 640px) {
	.ba-tldr {
		padding: 0 1.25rem;
	}
	.volume-takeaway,
	.section-takeaway {
		flex-direction: column;
		gap: 0.45rem;
	}
	.volume-takeaway .tk-label,
	.section-takeaway .tk-label {
		padding-top: 0;
	}
}
@media (prefers-reduced-motion: reduce) {
	.ba-readpath a {
		transition: none;
	}
}

/* 系列 chip：主卡内导向三册分册 */
.bc-chips { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .75rem; }
.bc-chips a {
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: .75rem; letter-spacing: .02em;
  padding: .2rem .6rem; border-radius: 999px;
  border: 1px solid var(--accent, #22d3ee);
  color: var(--accent, #22d3ee); text-decoration: none;
}
.bc-chips a:hover { background: var(--accent, #22d3ee); color: #0a0e14; }