:root {
  --blog-reading-width: 56rem;
  --blog-reading-gutter: 1.5rem;
  --blog-grid-step: 28px;
  --blog-link-offset: 0.2em;
}

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

.blog-index *,
.blog-article *,
.reading-wrap * {
  box-sizing: border-box;
}

.blog-list-wrap {
  padding-inline: max(16px, var(--gutter));
  padding-bottom: 3rem;
}

.blog-skip {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: var(--r-s);
  background: var(--text);
  color: var(--window);
  transform: translateY(-180%);
}

.blog-skip:focus {
  transform: translateY(0);
}

.blog-index :is(a, button):focus-visible,
.blog-article :is(a, button, summary, [tabindex]):focus-visible,
.reading-wrap :is(a, button, summary, [tabindex]):focus-visible,
.float-cta:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.breadcrumbs {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration-thickness: 1px;
  text-underline-offset: var(--blog-link-offset);
}

.breadcrumbs a:hover {
  color: var(--accent-dark);
}

.blog-hero,
.article-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: 1.5rem 2rem;
  padding-inline: var(--blog-reading-gutter);
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  background-color: var(--bg-panel);
  background-image:
    linear-gradient(var(--grid-ink) 1px, var(--clear) 1px),
    linear-gradient(90deg, var(--grid-ink) 1px, var(--clear) 1px),
    linear-gradient(var(--hero-top), var(--hero-bottom));
  background-size: var(--blog-grid-step) var(--blog-grid-step),
    var(--blog-grid-step) var(--blog-grid-step), 100% 100%;
  box-shadow: inset 0 1px 0 var(--hi-edge), 0 16px 48px var(--shadow-tint);
}

.article-chrome {
  position: relative;
  min-height: 2.65rem;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-block: 0.6rem;
  padding-inline: 4.5rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel-2);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.article-chrome::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 50%;
  width: 2.9rem;
  height: 0.55rem;
  margin-top: -0.275rem;
  background-image:
    radial-gradient(circle, var(--error) 65%, var(--clear) 70%),
    radial-gradient(circle, var(--warn) 65%, var(--clear) 70%),
    radial-gradient(circle, var(--success) 65%, var(--clear) 70%);
  background-position: left center, center center, right center;
  background-size: 0.55rem 0.55rem;
  background-repeat: no-repeat;
}

:is(.blog-hero, .article-hero) > .article-chrome {
  margin-block: -1.5rem 1.5rem;
  margin-inline: calc(-1 * var(--blog-reading-gutter));
}

.blog-kicker {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent-dark);
}

.blog-kicker::before {
  content: "";
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  margin-inline-end: 0.6rem;
  background: var(--accent);
  vertical-align: middle;
}

.blog-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.25;
}

.blog-hero h1,
.article-hero h1,
.blog-article :is(h1, h2, h3),
.reading-wrap :is(h1, h2, h3),
.prose :is(h1, h2, h3),
.article-card h3,
.promo-block h2,
#related-posts h2 {
  display: block;
  text-wrap: pretty;
  letter-spacing: -0.015em;
  overflow-wrap: anywhere;
}

.blog-hero h1 .no-break,
.article-hero h1 .no-break {
  background: linear-gradient(110deg, var(--accent), var(--cyan-deep));
  color: var(--accent-dark);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: var(--clear);
}

.hero-summary,
.article-hero > p:last-child {
  margin: 0;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.9;
}

.blog-feed {
  padding-top: 2.5rem;
}

.blog-feed > h2,
#related-posts > h2 {
  margin: 0 0 1.25rem;
  font-size: 1.5rem;
  line-height: 1.5;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.blog-filters button {
  min-height: 44px;
  padding: 0.65rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-s);
  background: var(--bg-panel);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  cursor: pointer;
  transition: background 180ms var(--ease), border-color 180ms var(--ease);
}

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

.blog-filters button:hover:not(:disabled) {
  border-color: var(--accent);
}

.blog-filters button:disabled {
  cursor: default;
}

.blog-status {
  min-height: 1.8em;
  margin: 0.75rem 0 1.25rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.8;
}

.blog-card-grid,
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.blog-card-grid > *,
.related-grid > *,
.stat-grid > *,
#post-nav > *,
.promo-block > * {
  min-width: 0;
}

.article-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  background: var(--bg-panel);
  box-shadow: inset 0 1px 0 var(--hi-edge), 0 12px 48px var(--shadow-tint);
  transition: border-color 180ms var(--ease), transform 180ms var(--ease);
}

.article-card:hover,
.article-card:focus-within {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.article-content {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem;
}

.article-meta,
.post-nav-meta {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.6;
}

.article-meta .tag,
.post-nav-meta .tag {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-s);
  background: var(--accent-dark);
  color: var(--window);
  white-space: normal;
  overflow-wrap: anywhere;
}

.article-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.6;
  font-weight: 700;
}

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

.article-card h3 a:hover {
  color: var(--accent-dark);
}

.article-content > p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.85;
  overflow-wrap: anywhere;
}

.article-link {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: auto;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-underline-offset: var(--blog-link-offset);
}

.blog-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 1.5rem;
  border: 1px dashed var(--border);
  border-radius: var(--r-m);
  background: var(--bg-panel);
  color: var(--text-muted);
  line-height: 1.8;
}

.reading-wrap,
.article-hero,
.blog-article > .breadcrumbs,
.blog-article > .promo-block,
.blog-article > #related-posts,
.blog-article > #post-nav {
  width: 100%;
  max-width: calc(var(--blog-reading-width) + var(--blog-reading-gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--blog-reading-gutter);
}

.reading-wrap {
  padding-block: 0;
}

.reading-wrap > .prose {
  /* base.css 把 .prose 钉在 840px 再居中,阅读列内容区更宽,h2 比 hero 标题右移 27px,
     质检 article-column-misaligned。铺满阅读列,左右留白仍由外层 wrap 居中承担。 */
  max-width: none;
  margin-inline: 0;
}

.article-hero {
  margin-bottom: 1.75rem;
}

.article-hero h1 {
  margin: 1rem 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  font-weight: 800;
  line-height: 1.4;
}

.article-hero .article-meta {
  gap: 0.5rem;
  justify-content: flex-start;
}

.article-hero .article-meta :is(time, .read-time, .reading-time) {
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--r-s);
  background: var(--bg-panel);
}

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

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

:is(.prose, .article-body, [data-article-body]) h2 {
  display: block;
  position: relative;
  margin-block: 2.25rem 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
  line-height: 1.55;
  letter-spacing: -0.015em;
  text-wrap: pretty;
  counter-increment: blog-chapter;
  scroll-margin-top: var(--anchor-offset);
}

:is(.prose, .article-body, [data-article-body]) h2::before {
  content: counter(blog-chapter, decimal-leading-zero);
  display: inline-block;
  margin-inline-end: 0.65rem;
  padding: 0.15rem 0.45rem;
  border-radius: var(--r-s);
  background: var(--bg-panel-2);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.7;
  vertical-align: 0.12em;
  letter-spacing: 0;
}

:is(.prose, .article-body, [data-article-body]) > h2:first-child,
:is(.prose, .article-body, [data-article-body]) > section:first-child > h2:first-child {
  margin-top: 0;
}

:is(.prose, .article-body, [data-article-body]) h3 {
  display: block;
  margin-block: 1.5rem 0.75rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.6;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

:is(.prose, .article-body, [data-article-body]) a {
  color: var(--accent-dark);
  text-underline-offset: var(--blog-link-offset);
}

:is(.prose, .article-body, [data-article-body]) li {
  margin-block: 0.5rem;
}

:is(.prose, .article-body, [data-article-body]) :is(ul, ol) {
  padding-inline-start: 1.6rem;
}

:is(.prose, .article-body, [data-article-body]) :not(pre) > code {
  padding: 0.15rem 0.4rem;
  border-radius: var(--r-s);
  background: var(--bg-panel-2);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.875em;
  white-space: normal;
  overflow-wrap: anywhere;
}

:is(.prose, .article-body, [data-article-body]) pre {
  position: relative;
  max-width: 100%;
  padding: 3rem 1.25rem 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--term-bar);
  border-radius: var(--r-m);
  background: var(--term-bg);
  color: var(--term-text);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.8;
  tab-size: 2;
}

:is(.prose, .article-body, [data-article-body]) pre::before {
  content: "";
  position: absolute;
  top: 1rem;
  left: 1.25rem;
  width: 2.9rem;
  height: 0.55rem;
  background-image:
    radial-gradient(circle, var(--error) 65%, var(--clear) 70%),
    radial-gradient(circle, var(--warn) 65%, var(--clear) 70%),
    radial-gradient(circle, var(--success) 65%, var(--clear) 70%);
  background-size: 0.55rem 0.55rem;
  background-position: left center, center center, right center;
  background-repeat: no-repeat;
}

:is(.prose, .article-body, [data-article-body]) pre code {
  padding: 0;
  background: var(--clear);
  color: inherit;
  font-family: var(--font-mono);
  white-space: pre;
  overflow-wrap: normal;
}

:is(.prose, .article-body, [data-article-body]) .table-scroll {
  max-width: 100%;
  margin-block: 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  background: var(--bg-panel);
}

:is(.prose, .article-body, [data-article-body]) table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.7;
}

:is(.prose, .article-body, [data-article-body]) .table-scroll table {
  min-width: 38rem;
  margin: 0;
}

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

:is(.prose, .article-body, [data-article-body]) thead th {
  background: var(--text);
  color: var(--window);
  font-weight: 600;
}

:is(.prose, .article-body, [data-article-body]) tbody tr {
  background: var(--bg-panel);
}

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

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

:is(.prose, .article-body, [data-article-body]) caption {
  padding: 0.75rem 1rem;
  color: var(--text-muted);
  text-align: start;
}

.callout,
:is(.prose, .article-body, [data-article-body]) blockquote {
  position: relative;
  margin-inline: 0;
  padding: 1.2rem 1.25rem 1.2rem 3.3rem;
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r-s);
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-panel));
  color: var(--text);
}

.callout::before,
:is(.prose, .article-body, [data-article-body]) blockquote::before {
  content: "i";
  position: absolute;
  top: 1.2rem;
  left: 1rem;
  width: 1.4rem;
  height: 1.4rem;
  border: 1px solid var(--accent);
  border-radius: var(--r-round);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.3rem;
  text-align: center;
}

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

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

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

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

.callout > :last-child,
:is(.prose, .article-body, [data-article-body]) blockquote > :last-child {
  margin-bottom: 0;
}

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

.stat-card {
  position: relative;
  padding: 1.5rem 1.25rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  background: var(--pastel-blue);
  color: var(--text);
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0.65rem;
  left: 1.25rem;
  width: 1.8rem;
  height: 3px;
  border-radius: var(--r-s);
  background: var(--accent);
}

.stat-card:nth-child(3n + 2) {
  background: var(--pastel-pink);
}

.stat-card:nth-child(3n) {
  background: var(--pastel-peach);
}

.stat-num {
  display: block;
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 300;
  line-height: 1.3;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  display: block;
  margin: 0;
  color: var(--text);
  font-size: 0.875rem;
  line-height: 1.8;
}

:is(.prose, .article-body, [data-article-body]) .check-list,
.check-list {
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-s);
  background: var(--bg-panel);
  list-style: none;
}

.verdict {
  margin-block: 1.5rem;
  padding: 1.2rem 1.25rem;
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r-s);
  background: var(--bg-panel-2);
  color: var(--text);
  line-height: 1.9;
}

.verdict > :last-child {
  margin-bottom: 0;
}

.promo-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-block: 2.5rem 1.5rem;
  padding-block: 1.75rem;
  padding-inline: var(--blog-reading-gutter);
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-m);
  background: linear-gradient(115deg, var(--accent-dark), var(--text));
  color: var(--window);
  box-shadow: 0 16px 48px var(--shadow-tint);
}

.promo-block > div:first-child {
  flex: 1 1 20rem;
}

.promo-block h2 {
  margin: 0 0 0.6rem;
  color: var(--window);
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.4;
}

.promo-block p {
  margin: 0;
  color: var(--window);
  font-size: 1rem;
  line-height: 1.85;
}

.promo-block .cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.promo-block .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.75rem 1.2rem;
  border: 1px solid var(--window);
  border-radius: var(--r-s);
  background: var(--window);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
}

.promo-block .btn-ghost {
  background: var(--clear);
  color: var(--window);
}

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

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

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

#related-posts:empty,
#post-nav:empty {
  display: none;
}

.related-grid .article-card h3 {
  font-size: 1.1rem;
}

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--r-m);
  background: var(--bg-panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color 180ms var(--ease), transform 180ms var(--ease);
}

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

.post-nav-card:hover,
.post-nav-card:focus-visible {
  border-top-color: var(--accent);
  transform: translateY(-2px);
}

.post-nav-label {
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

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

.post-nav-meta {
  margin-top: auto;
}

.float-cta {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 40;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  max-width: calc(100vw - 2rem);
  min-height: 48px;
  padding: 0.8rem 1.25rem;
  border: 1px solid var(--hi-line);
  border-radius: var(--r-round);
  background: var(--text);
  color: var(--window);
  box-shadow: 0 10px 48px var(--shadow-tint);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  text-decoration: none;
}

.float-cta svg {
  width: 1.2rem;
  height: 1.2rem;
  flex: 0 0 auto;
  fill: currentColor;
}

@media (max-width: 1000px) {
  .blog-card-grid,
  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

  :is(.prose, .article-body, [data-article-body]) .table-scroll table {
    display: table;
    width: 100%;
    max-width: none;
    overflow: visible;
  }
}

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

  .blog-card-grid,
  .related-grid,
  #post-nav {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .blog-hero h1 {
    font-size: clamp(1.8rem, 7vw, 2.5rem);
  }

  .article-hero h1 {
    font-size: clamp(1.6rem, 6.8vw, 2.15rem);
  }

  .blog-list-wrap {
    padding-inline: 16px;
  }

  .promo-block {
    gap: 1rem;
  }

  .promo-block .cta-row {
    width: 100%;
  }

  .promo-block .btn {
    flex: 1 1 8rem;
  }

  .float-cta {
    max-width: calc(100vw - 2rem);
    padding: 0.65rem 1rem;
  }

  body:has(.float-cta) {
    padding-bottom: calc(5rem + env(safe-area-inset-bottom));
  }
}

@media (prefers-reduced-motion: reduce) {
  .article-card,
  .post-nav-card,
  .blog-filters button,
  .float-cta {
    transition: none;
    animation: none;
  }

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