:root {
  --blog-column: 56rem;
  --blog-gutter: max(1.5rem, var(--gutter));
  --blog-ink: var(--text);
  --blog-paper: var(--bg-panel);
  --blog-tint: color-mix(in srgb, var(--accent) 7%, var(--bg-panel));
  --blog-success-tint: color-mix(in srgb, var(--success) 9%, var(--bg-panel));
  --blog-warning-tint: color-mix(in srgb, var(--warn) 12%, var(--bg-panel));
  --blog-code-bg: var(--text);
  --blog-code-text: var(--bg-panel);
  --blog-heading-font: var(--font-display);
  --blog-copy-font: var(--font-body);
  --blog-code-font: var(--font-mono);
  --blog-radius: var(--r);
  --blog-body-size: 1rem;
  --blog-small-size: 0.875rem;
  --blog-h1: clamp(1.8rem, 4vw, 2.6rem);
  --blog-list-h1: clamp(2rem, 5vw, 3rem);
  --blog-h2: clamp(1.3rem, 2.8vw, 1.6rem);
  --blog-h3: clamp(1.1rem, 2.4vw, 1.3rem);
  --blog-card-title: 1.2rem;
  --blog-stat-size: clamp(1.65rem, 4vw, 2.3rem);
  --blog-stamp-size: clamp(1.3rem, 4vw, 2rem);
  --blog-shadow: 0 16px 45px var(--accent-a10);
}

.blog-index *,
.blog-article *,
[data-blog-article] * {
  box-sizing: border-box;
}

.blog-index h1,
.blog-index h2,
.blog-index h3,
.blog-article h1,
.blog-article h2,
.blog-article h3,
[data-blog-article] h1,
[data-blog-article] h2,
[data-blog-article] h3,
.blog-hero h1,
.article-hero h1,
#related-posts h2,
#related-posts h3 {
  display: block;
  text-wrap: pretty;
  letter-spacing: -0.015em;
  overflow-wrap: anywhere;
  font-family: var(--blog-heading-font);
  color: var(--text);
}

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

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

.blog-index :focus-visible,
.blog-article :focus-visible,
[data-blog-article] :focus-visible,
#related-posts :focus-visible,
#post-nav :focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.blog-hero,
.article-hero {
  position: relative;
  isolation: isolate;
  background: var(--blog-paper);
  border: 1px solid var(--border);
  border-radius: var(--blog-radius);
  box-shadow: var(--blog-shadow);
  padding-block: 2rem;
  padding-inline: var(--blog-gutter);
}

.blog-hero::after,
.article-hero:not(.blog-hero)::after {
  content: "MQ";
  position: absolute;
  z-index: -1;
  top: 1.25rem;
  right: 1.25rem;
  display: grid;
  place-items: center;
  width: 4.5rem;
  aspect-ratio: 1;
  border: 3px double var(--accent);
  border-radius: var(--r-pill);
  color: var(--accent);
  background: var(--blog-tint);
  font-family: var(--blog-code-font);
  font-size: var(--blog-stamp-size);
  font-weight: 700;
  line-height: 1;
  transform: rotate(-11deg);
  pointer-events: none;
}

.blog-list-hero {
  margin-bottom: 2.5rem;
  padding-block: 3rem;
}

.blog-list-hero h1 {
  max-width: 90%;
  margin: 0.8rem 0 1rem;
  font-size: var(--blog-list-h1);
  line-height: 1.18;
  font-weight: 900;
}

.blog-kicker {
  max-width: calc(100% - 5rem);
  margin: 0;
  font-size: var(--blog-small-size);
  color: var(--text-muted);
}

.blog-intro {
  max-width: 42rem;
  margin: 0;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: 1.9;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.blog-filters button {
  appearance: none;
  min-height: 2.75rem;
  padding: 0.6rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--blog-radius);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--blog-copy-font);
  font-size: var(--blog-small-size);
  line-height: 1.5;
  cursor: pointer;
  transition: border-color var(--speed-fast), background var(--speed-fast);
}

.blog-filters button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

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

.blog-list-status {
  margin: 1rem 0;
  min-height: 1.6em;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
}

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

.article-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--blog-radius);
  box-shadow: var(--blog-shadow);
  transition: border-color var(--speed-fast), transform var(--speed-fast);
}

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

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

.article-meta > time,
.article-meta > .read-time,
.article-meta > .reading-time {
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  padding: 0.2rem 0.65rem;
  background: var(--bg-panel);
  font-variant-numeric: tabular-nums;
}

.article-meta .tag {
  display: inline-block;
  max-width: 100%;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--accent);
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--bg-panel);
  white-space: normal;
  overflow-wrap: anywhere;
}

.article-card h2,
.article-card h3,
#related-posts .article-card h3 {
  margin: 0;
  font-size: var(--blog-card-title);
  line-height: 1.6;
  font-weight: 800;
}

.article-card h2 a,
.article-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.article-card h2 a:hover,
.article-card h3 a:hover {
  color: var(--accent);
}

.article-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: 1.85;
}

.article-more {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 0.25rem;
  color: var(--accent);
  font-weight: 700;
  font-size: var(--blog-small-size);
  text-underline-offset: 0.25em;
}

.blog-empty {
  grid-column: 1 / -1;
  padding: 1.5rem;
  background: var(--bg-panel-2);
  border-radius: var(--blog-radius);
  color: var(--text-muted);
  line-height: 1.9;
}

/* 阅读列的盒宽与内衬统一，避免共享样式限制正文宽度。 */
.blog-article .reading-wrap,
[data-blog-article] .reading-wrap,
.reading-wrap.blog-article,
.reading-wrap[data-blog-article],
body:has([data-blog-article]) .reading-wrap,
body:has(.blog-article) .reading-wrap,
.article-hero,
.blog-article > .blog-hero,
[data-blog-article] > .blog-hero,
.breadcrumbs,
.breadcrumb,
.article-breadcrumbs {
  box-sizing: border-box;
  width: 100%;
  max-width: calc(var(--blog-column) + var(--blog-gutter) + var(--blog-gutter));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

.breadcrumbs,
.breadcrumb,
.article-breadcrumbs {
  margin-top: 1.5rem;
  margin-bottom: 1.25rem;
  font-size: var(--blog-small-size);
  line-height: 1.8;
  color: var(--text-muted);
  overflow-wrap: anywhere;
}

.breadcrumbs ol,
.breadcrumb ol,
.article-breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.65rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.breadcrumbs a,
.breadcrumb a,
.article-breadcrumbs a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

.article-hero {
  margin-block: 0 1.5rem;
}

.article-hero .article-meta,
.blog-article > .blog-hero .article-meta,
[data-blog-article] > .blog-hero .article-meta {
  padding-right: 5rem;
  min-height: 4rem;
  align-content: flex-start;
}

.article-hero h1,
.blog-article h1,
[data-blog-article] h1 {
  margin: 1rem 0;
  font-size: var(--blog-h1);
  line-height: 1.35;
  font-weight: 900;
}

.article-hero > p,
.article-hero .article-summary,
.blog-article > .blog-hero > p,
[data-blog-article] > .blog-hero > p {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: 1.9;
}

.blog-article .prose,
[data-blog-article] .prose,
.prose.blog-article,
.prose[data-blog-article] {
  color: var(--text);
  font-family: var(--blog-copy-font);
  font-size: var(--blog-body-size);
  line-height: 1.9;
  counter-reset: blog-section;
}

.blog-article .prose,
[data-blog-article] .prose {
  padding-top: 0;
  padding-bottom: 1.5rem;
}

.blog-article .prose h2,
[data-blog-article] .prose h2,
.prose.blog-article h2,
.prose[data-blog-article] h2 {
  position: relative;
  margin: 2.3rem 0 1rem;
  font-size: var(--blog-h2);
  line-height: 1.5;
  counter-increment: blog-section;
  scroll-margin-top: var(--anchor-offset);
}

.blog-article .prose h2::before,
[data-blog-article] .prose h2::before,
.prose.blog-article h2::before,
.prose[data-blog-article] h2::before {
  content: counter(blog-section, decimal-leading-zero);
  display: inline-block;
  margin-inline-end: 0.65rem;
  padding: 0.15rem 0.45rem;
  border-radius: var(--r-xs);
  background: var(--bg-panel-2);
  color: var(--accent-dark);
  font-family: var(--blog-code-font);
  font-size: var(--blog-small-size);
  vertical-align: 0.1em;
}

.blog-article .prose > h2:first-child,
[data-blog-article] .prose > h2:first-child,
.blog-article .prose > section:first-child > h2:first-child,
[data-blog-article] .prose > section:first-child > h2:first-child {
  margin-top: 0.75rem;
}

.blog-article .prose h3,
[data-blog-article] .prose h3,
.prose.blog-article h3,
.prose[data-blog-article] h3 {
  margin: 1.6rem 0 0.65rem;
  font-size: var(--blog-h3);
  line-height: 1.6;
}

.blog-article .prose p,
[data-blog-article] .prose p {
  margin: 0.9rem 0;
}

.blog-article .prose :is(ul, ol),
[data-blog-article] .prose :is(ul, ol) {
  padding-inline-start: 1.5rem;
  margin-block: 1rem;
}

.blog-article .prose li,
[data-blog-article] .prose li {
  margin-block: 0.45rem;
}

.blog-article .prose a,
[data-blog-article] .prose a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
  overflow-wrap: anywhere;
}

.blog-article .prose img,
[data-blog-article] .prose img {
  max-width: 100%;
  height: auto;
  border-radius: var(--blog-radius);
}

.blog-article .table-scroll,
[data-blog-article] .table-scroll {
  max-width: 100%;
  overflow-x: auto;
  margin-block: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--blog-radius);
  overscroll-behavior-inline: contain;
}

.blog-article .prose table,
[data-blog-article] .prose table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-panel);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.blog-article .prose :is(th, td),
[data-blog-article] .prose :is(th, td) {
  min-width: 8rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.blog-article .prose thead th,
[data-blog-article] .prose thead th {
  background: var(--accent-dark);
  color: var(--bg-panel);
  font-weight: 700;
}

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

.blog-article .prose tbody tr:hover,
[data-blog-article] .prose tbody tr:hover {
  background: var(--blog-tint);
}

.blog-article .prose pre,
[data-blog-article] .prose pre {
  position: relative;
  margin: 1.5rem 0;
  max-width: 100%;
  overflow-x: auto;
  padding: 3rem 1.25rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--blog-radius);
  background: var(--blog-code-bg);
  color: var(--blog-code-text);
  font-family: var(--blog-code-font);
  font-size: var(--blog-small-size);
  line-height: 1.8;
  tab-size: 2;
}

.blog-article .prose pre::before,
[data-blog-article] .prose pre::before {
  content: "MQ / TEXT";
  position: absolute;
  top: 0.65rem;
  left: 1.25rem;
  color: var(--blog-code-text);
  font-family: var(--blog-code-font);
  font-size: var(--blog-small-size);
}

.blog-article .prose code,
[data-blog-article] .prose code {
  font-family: var(--blog-code-font);
  font-size: var(--blog-small-size);
  overflow-wrap: anywhere;
}

.blog-article .prose :not(pre) > code,
[data-blog-article] .prose :not(pre) > code {
  padding: 0.15rem 0.35rem;
  border-radius: var(--r-xs);
  color: var(--accent-dark);
  background: var(--bg-panel-2);
}

.blog-article .prose pre code,
[data-blog-article] .prose pre code {
  color: inherit;
  background: none;
  white-space: pre;
  overflow-wrap: normal;
}

.callout,
.verdict {
  position: relative;
  margin: 1.5rem 0;
  padding: 1.25rem 1.4rem;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--blog-radius);
  background: var(--blog-tint);
  color: var(--text);
  font-size: var(--blog-body-size);
  line-height: 1.9;
}

.callout {
  padding-left: 3.4rem;
}

.callout::before {
  content: "i";
  position: absolute;
  top: 1.3rem;
  left: 1rem;
  display: inline-grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  border: 1px solid currentColor;
  border-radius: var(--r-pill);
  color: var(--accent);
  font-family: var(--blog-code-font);
  font-weight: 700;
  line-height: 1;
}

.callout.warning,
.callout-warning {
  background: var(--blog-warning-tint);
  border-left-color: var(--warn);
}

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

.callout.success,
.callout-success {
  background: var(--blog-success-tint);
  border-left-color: var(--success);
}

.callout.success::before,
.callout-success::before {
  content: "✓";
  color: var(--success);
}

.callout cite {
  display: block;
  margin-top: 0.7rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
  font-style: normal;
}

.verdict > strong:first-child,
.verdict > p:first-child > strong:first-child {
  color: var(--accent-dark);
  font-weight: 800;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-block: 1.5rem;
}

.stat-card {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--blog-radius);
  background: var(--blog-tint);
}

.stat-card:nth-child(even) {
  background: var(--bg-panel-2);
  border-top-color: var(--text-muted);
}

.stat-num {
  display: block;
  color: var(--accent-dark);
  font-family: var(--blog-code-font);
  font-size: var(--blog-stat-size);
  line-height: 1.4;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.stat-label {
  display: block;
  margin-top: 0.45rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.blog-article .prose .check-list,
[data-blog-article] .prose .check-list,
.check-list {
  list-style: none;
  padding: 0;
  margin-block: 1.5rem;
}

.check-list li {
  margin-block: 0.65rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--blog-radius);
  background: var(--bg-panel);
  line-height: 1.9;
}

.check-list li::before {
  content: none;
}

.check-list li::marker {
  content: "";
}

.promo-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-block: 1.75rem;
  padding: 1.75rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--blog-radius);
  background: linear-gradient(120deg, var(--accent-dark), var(--accent));
  color: var(--bg-panel);
  box-shadow: var(--blog-shadow);
}

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

.promo-block .promo-copy strong {
  color: var(--bg-panel);
  font-family: var(--blog-heading-font);
  font-size: var(--blog-h3);
  font-weight: 900;
}

.promo-block .promo-copy p {
  margin: 0.5rem 0 0;
  color: var(--bg-panel);
  font-size: var(--blog-body-size);
  line-height: 1.85;
}

.promo-block .btn-primary {
  background: var(--bg-panel);
  color: var(--accent-dark);
  border: 1px solid var(--bg-panel);
  box-shadow: none;
}

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

.promo-block .btn-ghost {
  background: var(--clear);
  color: var(--bg-panel);
  border: 1px solid var(--bg-panel);
}

.promo-block .btn-ghost:hover {
  background: var(--accent-dark);
}

#related-posts,
#post-nav {
  width: 100%;
  max-width: calc(var(--blog-column) + var(--blog-gutter) + var(--blog-gutter));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
  box-sizing: border-box;
}

.reading-wrap #related-posts,
.reading-wrap #post-nav,
.prose #related-posts,
.prose #post-nav {
  max-width: 100%;
  padding-inline: 0;
}

#related-posts {
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

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

#related-posts > h2 {
  margin: 0 0 1.25rem;
  font-size: var(--blog-h2);
  line-height: 1.5;
}

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

#related-posts .article-card {
  padding: 1.15rem;
}

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

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--blog-radius);
  background: var(--bg-panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--speed-fast), transform var(--speed-fast);
}

.post-nav-card:hover,
.post-nav-card:focus-visible {
  border-top-color: var(--accent);
  transform: translateY(-3px);
}

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

.post-nav-label {
  color: var(--accent);
  font-size: var(--blog-small-size);
  font-weight: 700;
}

.post-nav-card strong {
  color: var(--text);
  font-size: var(--blog-body-size);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.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: 0.5rem;
  max-width: calc(100vw - 2rem);
  padding: 0.85rem 1.3rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--bg-panel);
  box-shadow: var(--blog-shadow);
  font-family: var(--blog-copy-font);
  font-size: var(--blog-small-size);
  font-weight: 700;
  line-height: 1.5;
  text-decoration: none;
}

.float-cta svg {
  width: 1.15rem;
  height: 1.15rem;
  flex: 0 0 auto;
  stroke: currentColor;
}

.float-cta:hover {
  background: var(--accent-dark);
}

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

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

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

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

  .blog-card-grid,
  #post-nav,
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .blog-list-hero {
    padding-block: 2rem;
  }

  .blog-list-hero h1 {
    font-size: min(var(--blog-list-h1), 2.5rem);
  }

  .article-hero h1,
  .blog-article h1,
  [data-blog-article] h1 {
    font-size: min(var(--blog-h1), 2.5rem);
  }

  .blog-hero::after,
  .article-hero:not(.blog-hero)::after {
    width: 3.75rem;
    top: 1rem;
    right: 1rem;
  }

  .article-card,
  .promo-block {
    padding: 1.25rem;
  }

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

  .promo-block .cta-row {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    gap: 0.75rem;
  }

  .float-cta {
    right: max(0.75rem, env(safe-area-inset-right));
    bottom: max(0.75rem, env(safe-area-inset-bottom));
    padding: 0.7rem 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;
  }
}