:root {
  --blog-reading: 56rem;
  --blog-column: calc(var(--blog-reading) + var(--gutter) + var(--gutter));
  --blog-title-spacing: -0.02em;
  --blog-rule: 1px;
  --blog-card-padding: 1.5rem;
  --blog-motion: 160ms;
}

/* Keep every article section on the same reading column. */
.reading-wrap,
.article-hero,
.breadcrumbs,
.article-breadcrumbs,
nav[aria-label="面包屑"],
body:not(.blog-index) .article-body,
body:not(.blog-index) [data-article-body],
body:not(.blog-index) .promo-block,
#related-posts,
#post-nav {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--blog-column);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-width: 0;
}

.reading-wrap .article-hero,
.reading-wrap .breadcrumbs,
.reading-wrap .article-breadcrumbs,
.reading-wrap nav[aria-label="面包屑"],
body:not(.blog-index) .reading-wrap .article-body,
body:not(.blog-index) .reading-wrap [data-article-body],
.reading-wrap .promo-block,
.reading-wrap #related-posts,
.reading-wrap #post-nav {
  width: 100%;
  max-width: none;
  padding-inline: 0;
}

.blog-index main,
.article-body,
[data-article-body] {
  font-family: var(--f-body);
  color: var(--text);
}

.blog-index :is(h1, h2, h3),
.article-hero :is(h1, h2, h3),
.article-body :is(h1, h2, h3),
[data-article-body] :is(h1, h2, h3),
#related-posts :is(h2, h3) {
  display: block;
  font-family: var(--f-display);
  letter-spacing: var(--blog-title-spacing);
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

.blog-index :is(a, button):focus-visible,
.article-hero a:focus-visible,
.article-body a:focus-visible,
#related-posts a:focus-visible,
#post-nav a:focus-visible,
.promo-block a:focus-visible {
  outline: 3px solid var(--text);
  outline-offset: 4px;
}

.blog-skip {
  position: fixed;
  inset-block-start: 1rem;
  inset-inline-start: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  color: var(--on-ink);
  background: var(--ink);
  border-radius: var(--r-sm);
  transform: translateY(-200%);
}

.blog-skip:focus {
  transform: none;
}

.blog-list-hero {
  padding-block: clamp(3rem, 7vw, 5rem) 2rem;
  text-align: center;
}

.blog-kicker {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  color: var(--muted);
  font-family: var(--f-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.blog-kicker .tag-dot {
  width: 0.45rem;
  height: 0.45rem;
  background: var(--accent);
  border-radius: var(--r-round);
}

.blog-list-hero h1 {
  margin-block: 1rem;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  line-height: 1.22;
}

.blog-intro {
  max-width: 42rem;
  margin-inline: auto;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.9;
}

.blog-fact-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.5rem;
  margin-block-start: 1.75rem;
  padding: 1rem;
  border-block: var(--blog-rule) solid var(--border);
  color: var(--muted);
  font-size: 0.875rem;
}

.blog-fact-strip a {
  color: var(--text);
  text-underline-offset: 0.25em;
}

.blog-catalog {
  padding-block: 1rem 2.5rem;
}

.blog-catalog-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
  margin-block-end: 1rem;
}

.blog-catalog-heading h2 {
  margin: 0;
  font-size: 1.5rem;
}

#blog-list-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-block-end: 1.75rem;
}

.blog-filters button {
  min-height: 2.75rem;
  padding: 0.55rem 1rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--text);
  font-family: var(--f-body);
  font-size: 0.9rem;
  cursor: pointer;
}

.blog-filters button:hover {
  border-color: var(--steel);
  background: var(--panel-2);
}

.blog-filters button[aria-pressed="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--on-ink);
}

.blog-card-grid,
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.article-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: var(--blog-card-padding);
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-md);
  background: var(--panel);
  box-shadow: var(--shadow-panel);
  transition: border-color var(--blog-motion) var(--ease),
    transform var(--blog-motion) var(--ease);
}

.article-card:hover,
.article-card:focus-within {
  border-color: var(--steel);
  transform: translateY(-2px);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.6rem 0.9rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.article-meta time {
  font-family: var(--f-mono);
}

.article-tag {
  display: inline-block;
  padding: 0.25rem 0.55rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-xs);
  color: var(--text);
  background: var(--panel-2);
  font-size: 0.8rem;
  white-space: normal;
}

.article-card h3 {
  margin-block: 1rem 0.75rem;
  font-size: 1.2rem;
  line-height: 1.6;
  text-wrap: pretty;
}

.article-card h3 a {
  color: var(--text);
  text-decoration: none;
  overflow-wrap: anywhere;
}

.article-card h3 a:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.article-card p {
  margin-block: 0 1.5rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.article-read-link {
  align-self: flex-start;
  margin-block-start: auto;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 700;
  text-underline-offset: 0.3em;
}

.blog-empty {
  grid-column: 1 / -1;
  padding: 2rem;
  border: var(--blog-rule) dashed var(--border);
  border-radius: var(--r-md);
  color: var(--muted);
  background: var(--panel);
  line-height: 1.8;
}

.breadcrumbs,
.article-breadcrumbs,
nav[aria-label="面包屑"] {
  margin-block-start: 1.5rem;
  margin-block-end: 1.25rem;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.breadcrumbs ol,
.article-breadcrumbs ol,
nav[aria-label="面包屑"] ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs a,
.article-breadcrumbs a,
nav[aria-label="面包屑"] a {
  color: var(--muted);
  text-underline-offset: 0.2em;
}

/* The hero uses an unboxed column so title and body share a left edge. */
.article-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 1fr);
  align-items: start;
  gap: 2rem;
  padding-block: 1.5rem 2rem;
  margin-block-end: 0;
  border: 0;
  background: none;
  box-shadow: none;
}

.article-hero::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline: var(--gutter);
  height: 1px;
  background: var(--border);
}

.reading-wrap .article-hero::before {
  inset-inline: 0;
}

.article-hero > * {
  min-width: 0;
}

.article-hero-main,
.article-hero-copy,
.article-hero-content {
  grid-column: 1;
  grid-row: 1;
}

.article-hero h1 {
  margin-block: 0 1rem;
  font-size: clamp(1.8rem, 3.8vw, 2.6rem);
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: var(--blog-title-spacing);
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

.article-hero :is(.article-summary, .article-deck, .article-lead),
.article-hero-main > p,
.article-hero-copy > p,
.article-hero-content > p {
  margin-block: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
}

.article-hero > .article-meta,
.article-hero > .article-hero-meta,
.article-hero > .article-meta-card {
  position: relative;
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 0.9rem;
  padding: 1.5rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel);
  box-shadow: inset 0 1px 0 var(--hl), var(--shadow-panel);
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.article-hero > :is(.article-meta, .article-hero-meta, .article-meta-card)::before {
  content: "";
  display: block;
  width: 2rem;
  height: 0.35rem;
  border-block: var(--blog-rule) solid var(--steel);
}

.article-hero :is(.article-meta, .article-hero-meta, .article-meta-card) .badge {
  background: var(--ink);
  color: var(--on-ink);
  border-color: var(--ink);
  white-space: normal;
}

.article-hero :is(time, .read-time, .reading-time) {
  display: inline-block;
  padding: 0.3rem 0.5rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-xs);
  font-family: var(--f-mono);
  font-size: 0.75rem;
  white-space: normal;
}

.article-body,
[data-article-body],
.reading-wrap.prose {
  counter-reset: blog-section;
  font-size: 1rem;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.article-body > :first-child,
[data-article-body] > :first-child {
  margin-block-start: 0;
}

.article-body h2,
[data-article-body] h2,
.reading-wrap.prose h2 {
  counter-increment: blog-section;
  margin-block: 2.25rem 1rem;
  padding-block-end: 0.65rem;
  border-block-end: var(--blog-rule) solid var(--border);
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
  line-height: 1.55;
}

.article-body h2::before,
[data-article-body] h2::before,
.reading-wrap.prose h2::before {
  content: counter(blog-section, decimal-leading-zero);
  display: inline-block;
  margin-inline-end: 0.65rem;
  padding: 0.1rem 0.4rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--muted);
  font-family: var(--f-mono);
  font-size: 0.75rem;
  vertical-align: 0.15em;
  letter-spacing: 0;
}

.article-body h3,
[data-article-body] h3,
.reading-wrap.prose h3 {
  margin-block: 1.75rem 0.75rem;
  font-size: 1.25rem;
  line-height: 1.6;
}

.article-body :is(p, ul, ol),
[data-article-body] :is(p, ul, ol) {
  margin-block: 0 1.25rem;
}

.article-body li + li,
[data-article-body] li + li {
  margin-block-start: 0.45rem;
}

.article-body a,
[data-article-body] a {
  color: var(--text);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

.article-body :not(pre) > code,
[data-article-body] :not(pre) > code {
  padding: 0.15rem 0.35rem;
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--text);
  font-family: var(--f-mono);
  font-size: 0.875em;
  overflow-wrap: anywhere;
}

.article-body pre,
[data-article-body] pre {
  position: relative;
  max-width: 100%;
  margin-block: 1.5rem;
  padding: 2.8rem 1.25rem 1.25rem;
  border: var(--blog-rule) solid var(--on-ink-line);
  border-radius: var(--r-sm);
  background: var(--ink);
  color: var(--on-ink);
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.8;
}

.article-body pre::before,
[data-article-body] pre::before {
  content: "TERMINAL";
  position: absolute;
  inset-block-start: 0.6rem;
  inset-inline-start: 1.25rem;
  color: var(--on-ink-muted);
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
}

.article-body pre code,
[data-article-body] pre code {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font-family: var(--f-mono);
  white-space: pre;
  overflow-wrap: normal;
}

.article-body .table-scroll,
[data-article-body] .table-scroll {
  max-width: 100%;
  margin-block: 1.5rem;
  overflow-x: auto;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-sm);
}

.article-body table,
[data-article-body] table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  font-size: 0.9rem;
  line-height: 1.7;
}

.article-body :is(th, td),
[data-article-body] :is(th, td) {
  padding: 0.85rem 1rem;
  border-block-end: var(--blog-rule) solid var(--border);
  text-align: start;
  vertical-align: top;
}

.article-body thead th,
[data-article-body] thead th {
  color: var(--on-ink);
  background: var(--ink);
}

.article-body tbody tr:nth-child(even),
[data-article-body] tbody tr:nth-child(even) {
  background: var(--panel-2);
}

.article-body tbody tr:hover,
[data-article-body] tbody tr:hover {
  background: color-mix(in srgb, var(--steel) 18%, var(--panel));
}

.article-body blockquote,
[data-article-body] blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-inline-start: 3px solid var(--steel);
  background: var(--panel);
  color: var(--muted);
}

.callout {
  position: relative;
  margin-block: 1.5rem;
  padding: 1.25rem 1.25rem 1.25rem 3.5rem;
  border: var(--blog-rule) solid var(--border);
  border-inline-start: 4px solid var(--steel);
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--text);
}

.callout::before {
  content: "i";
  position: absolute;
  inset-block-start: 1.25rem;
  inset-inline-start: 1rem;
  width: 1.5rem;
  height: 1.5rem;
  border: var(--blog-rule) solid currentColor;
  border-radius: var(--r-round);
  color: var(--muted);
  font-family: var(--f-mono);
  font-size: 0.8rem;
  line-height: 1.5rem;
  text-align: center;
}

.callout:is(.warning, .callout-warning) {
  border-inline-start-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 10%, var(--panel));
}

.callout:is(.warning, .callout-warning)::before {
  content: "!";
  color: var(--text);
}

.callout:is(.success, .callout-success) {
  border-inline-start-color: var(--success);
  background: color-mix(in srgb, var(--success) 9%, var(--panel));
}

.callout:is(.success, .callout-success)::before {
  color: var(--text);
}

.callout > :last-child,
.verdict > :last-child,
.article-body blockquote > :last-child {
  margin-block-end: 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  gap: 1rem;
  margin-block: 1.5rem;
}

.stat-card {
  min-width: 0;
  padding: 1.25rem;
  border: var(--blog-rule) solid var(--border);
  border-block-start: 3px solid var(--steel);
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--text);
}

.stat-card:nth-child(even) {
  border-block-start-color: var(--ink);
  background: var(--panel-2);
}

.stat-num {
  display: block;
  font-family: var(--f-display);
  font-size: 1.75rem;
  font-weight: 900;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.stat-label {
  display: block;
  margin-block-start: 0.4rem;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.check-list {
  display: grid;
  gap: 0.75rem;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: 0.9rem 1rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel);
  list-style: none;
}

.verdict {
  margin-block: 1.5rem;
  padding: 1.15rem 1.3rem;
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--text);
}

.verdict strong:first-child {
  font-weight: 900;
}

.promo-block {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-block: 2rem;
  padding-block: 1.75rem;
  border-block: 3px double var(--steel);
  border-radius: var(--r-sm);
  background: var(--ink);
  color: var(--on-ink);
}

.promo-copy {
  flex: 1 1 18rem;
  min-width: 0;
}

.promo-copy strong {
  font-family: var(--f-display);
  font-size: 1.5rem;
  font-weight: 900;
}

.promo-copy p {
  margin-block: 0.5rem 0;
  color: var(--on-ink-muted);
  font-size: 1rem;
  line-height: 1.8;
}

.promo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.promo-block .btn-primary {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
  box-shadow: none;
}

.promo-block .btn-primary:hover {
  background: var(--panel-2);
  border-color: var(--panel-2);
}

.promo-block .btn-ghost {
  background: var(--clear);
  color: var(--on-ink);
  border-color: var(--on-ink-line);
}

.reading-wrap .promo-block {
  padding-inline: 1.5rem;
}

.blog-list-promo {
  padding-inline: max(var(--gutter), 1.5rem);
}

#related-posts {
  padding-block: 1.5rem 1rem;
}

#related-posts > h2 {
  margin-block: 0 1rem;
  font-size: 1.5rem;
  line-height: 1.6;
}

.related-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.related-card {
  padding: 1.15rem;
  box-shadow: none;
}

.related-card h3 {
  font-size: 1.05rem;
}

.related-card p {
  font-size: 0.9rem;
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding-block: 1rem 2rem;
}

#post-nav[hidden],
#related-posts[hidden] {
  display: none;
}

.post-nav-card {
  display: block;
  min-width: 0;
  padding: 1.25rem;
  border: var(--blog-rule) solid var(--border);
  border-block-start: 3px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--blog-motion) var(--ease);
}

.post-nav-card:hover,
.post-nav-card:focus-visible {
  border-block-start-color: var(--steel);
  background: var(--panel-2);
}

.post-nav-next {
  grid-column: 2;
}

.post-nav-label {
  display: block;
  margin-block-end: 0.65rem;
  color: var(--muted);
  font-family: var(--f-mono);
  font-size: 0.8rem;
}

.post-nav-card strong {
  font-size: 1rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

@media (max-width: 860px) {
  .article-body table,
  [data-article-body] table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }

  .article-body .table-scroll table,
  [data-article-body] .table-scroll table {
    display: table;
    width: 100%;
    min-width: 36rem;
    max-width: none;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .no-break {
    white-space: normal;
  }

  .blog-card-grid {
    grid-template-columns: 1fr;
  }

  .article-hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
  }

  .article-hero-main,
  .article-hero-copy,
  .article-hero-content {
    grid-column: 1;
    grid-row: 2;
  }

  .article-hero > .article-meta,
  .article-hero > .article-hero-meta,
  .article-hero > .article-meta-card {
    grid-column: 1;
    grid-row: 1;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.6rem;
    padding: 1.5rem;
  }

  .article-hero > :is(.article-meta, .article-hero-meta, .article-meta-card)::before {
    display: none;
  }

  .article-hero h1 {
    font-size: clamp(1.75rem, 7vw, 2.2rem);
  }

  .article-card {
    padding: 1.25rem;
  }

  #post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav-next {
    grid-column: 1;
  }

  .promo-actions {
    width: 100%;
  }

  .promo-actions .btn {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .article-card,
  .post-nav-card {
    transition: none;
  }

  .article-card:hover,
  .article-card:focus-within {
    transform: none;
  }
}