:root {
  --blog-meta-size: 0.8125rem;
  --blog-body-size: 1rem;
  --blog-list-title: clamp(1.75rem, 3.5vw, 3rem);
  --blog-article-title: clamp(1.5rem, 1.1rem + 1.4vw, 2rem);
  --blog-lead-size: clamp(0.9375rem, 0.85rem + 0.45vw, 1.125rem);
  --blog-card-title: 1.25rem;
  --blog-h2-size: 1.5rem;
  --blog-h3-size: 1.25rem;
  --blog-card-pad: clamp(1.25rem, 3vw, 2rem);
  --blog-focus-width: 2px;
  --blog-rule-width: 1px;
  --blog-note-width: 3px;
  --blog-link-opacity: 0.72;
  --blog-separator-opacity: 0.35;
  --blog-body-leading: 1.85;
  --blog-title-leading: 1.32;
}

.blog-main {
  padding-block: 2.5rem 5rem;
  min-width: 0;
}

.blog-hero {
  padding-block: 1.5rem 2.5rem;
  text-align: center;
}

.blog-hero h1 {
  margin: 1rem 0;
  max-width: 100%;
  font-family: var(--font-display);
  font-size: var(--blog-list-title);
  font-weight: 800;
  line-height: var(--blog-title-leading);
  color: var(--text);
  overflow-wrap: anywhere;
}

.blog-intro {
  max-width: 44rem;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: var(--blog-lead-size);
  line-height: 1.7;
}

.blog-topics {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.625rem;
  margin-top: 1.5rem;
}

.blog-topics span {
  padding: 0.5rem 0.875rem;
  border-radius: var(--r-pill);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: var(--blog-meta-size);
}

.blog-catalog {
  padding-top: 1.5rem;
}

.blog-catalog > h2 {
  margin: 0 0 1.25rem;
  font-size: var(--blog-h2-size);
  line-height: 1.4;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.blog-filters button {
  min-height: 2.75rem;
  padding: 0.625rem 1rem;
  border: var(--blog-rule-width) solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  line-height: 1.5;
  cursor: pointer;
}

.blog-filters button:hover {
  background: var(--bg-panel);
  color: var(--text);
}

.blog-filters button[aria-pressed="true"] {
  background: var(--bg-panel-2);
  color: var(--text);
  border-color: var(--text-muted);
  font-weight: 700;
}

.blog-filters button:focus-visible,
.post-card a:focus-visible,
.post-nav-card:focus-visible,
.blog-breadcrumb a:focus-visible,
nav.breadcrumb a:focus-visible,
nav.breadcrumbs a:focus-visible {
  outline: var(--blog-focus-width) solid var(--accent);
  outline-offset: 4px;
}

.blog-result {
  margin: 1.25rem 0;
  color: var(--text-muted);
  font-size: var(--blog-meta-size);
  line-height: 1.6;
}

.blog-post-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.blog-post-grid > *,
#related-posts > *,
#post-nav > * {
  min-width: 0;
}

.blog-post-grid .post-card,
#related-posts .post-card {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0;
  padding: var(--blog-card-pad);
  border: var(--blog-rule-width) solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg-panel);
  color: var(--text);
}

.post-card .post-meta,
.article-meta,
.article-hero .post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem 1rem;
  color: var(--text-muted);
  font-size: var(--blog-meta-size);
  line-height: 1.6;
}

.post-card .tag,
.article-meta .tag,
.article-hero .tag {
  display: inline-block;
  max-width: 100%;
  padding: 0.25rem 0.625rem;
  border-radius: var(--r-pill);
  background: var(--bg-panel-2);
  color: var(--text-muted);
  font-size: var(--blog-meta-size);
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.post-card h3 {
  margin: 1rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: var(--blog-card-title);
  line-height: 1.5;
  overflow-wrap: anywhere;
}

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

.post-card h3 a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.post-card .post-summary {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.post-card .post-read {
  align-self: flex-start;
  margin-top: auto;
  color: var(--accent);
  font-size: var(--blog-body-size);
  font-weight: 600;
  text-decoration: none;
  line-height: 1.6;
}

.post-card .post-read:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

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

.blog-empty a {
  color: var(--accent);
}

/* 路标别名统一接入；当前页只占一行。 */
.blog-breadcrumb,
nav.breadcrumb,
nav.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
  padding-block: 0;
  min-width: 0;
  max-width: 100%;
  white-space: nowrap;
  overflow: hidden;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-meta-size);
  line-height: 1.6;
}

.blog-breadcrumb a,
nav.breadcrumb a,
nav.breadcrumbs a {
  flex: 0 0 auto;
  color: var(--text-muted);
  opacity: var(--blog-link-opacity);
  text-decoration: none;
}

.blog-breadcrumb a:hover,
nav.breadcrumb a:hover,
nav.breadcrumbs a:hover {
  color: var(--accent);
  opacity: 1;
}

.blog-breadcrumb > [aria-hidden="true"],
nav.breadcrumb > [aria-hidden="true"],
nav.breadcrumbs > [aria-hidden="true"],
.blog-breadcrumb .separator,
nav.breadcrumb .separator,
nav.breadcrumbs .separator {
  flex: 0 0 auto;
  color: var(--text-muted);
  opacity: var(--blog-separator-opacity);
}

.blog-breadcrumb [aria-current="page"],
nav.breadcrumb [aria-current="page"],
nav.breadcrumbs [aria-current="page"] {
  flex: 0 1 auto;
  min-width: 0;
  max-width: 30ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-muted);
}

main.reading { padding-top: 32px; }
main.reading > nav { margin: 0 0 20px; }
main.reading > nav p { margin: 0; }
main.reading > article > header .post-meta { margin: 0 0 14px; }
main.reading > article > header h1 {
  font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2rem);
  margin: 0 0 12px;
}

.article-page main,
.blog-article main {
  min-width: 0;
}

.article-page main > .section:first-child,
.blog-article main > .section:first-child,
.article-page main.section,
.blog-article main.section {
  padding-top: 1.5rem;
}

.article-hero,
.article-hero.section {
  margin: 0;
  padding-block: 0.5rem 1.5rem;
  min-width: 0;
}

.article-hero .article-meta,
.article-hero .post-meta {
  margin: 0 0 1rem;
}

.article-hero h1 {
  display: block;
  max-width: 100%;
  margin: 1rem 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: var(--blog-article-title);
  font-weight: 800;
  line-height: var(--blog-title-leading);
  overflow-wrap: anywhere;
}

.article-lead,
.article-hero .lead,
.article-hero .article-summary {
  margin: 1rem 0 0;
  color: var(--text-muted);
  font-size: var(--blog-lead-size);
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.article-body,
.article-page .prose,
.blog-article .prose {
  min-width: 0;
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
  overflow-wrap: anywhere;
}

:is(.article-body, .article-page .prose, .blog-article .prose) > :first-child {
  margin-top: 0;
}

:is(.article-body, .article-page .prose, .blog-article .prose) section,
:is(.article-body, .article-page .prose, .blog-article .prose) section.section {
  margin: 0;
  padding-block: 0;
  min-width: 0;
}

:is(.article-body, .article-page .prose, .blog-article .prose) section + section {
  margin-top: 2rem;
}

:is(.article-body, .article-page .prose, .blog-article .prose) h2 {
  display: block;
  margin: 2rem 0 1rem;
  color: var(--text);
  font-size: var(--blog-h2-size);
  line-height: 1.45;
}

:is(.article-body, .article-page .prose, .blog-article .prose) > h2:first-of-type,
:is(.article-body, .article-page .prose, .blog-article .prose) section > h2:first-child {
  margin-top: 0;
}

:is(.article-body, .article-page .prose, .blog-article .prose) h3 {
  display: block;
  margin: 1.5rem 0 0.75rem;
  color: var(--text);
  font-size: var(--blog-h3-size);
  line-height: 1.5;
}

:is(.article-body, .article-page .prose, .blog-article .prose) p,
:is(.article-body, .article-page .prose, .blog-article .prose) ul,
:is(.article-body, .article-page .prose, .blog-article .prose) ol {
  margin-block: 0 1.25rem;
}

:is(.article-body, .article-page .prose, .blog-article .prose) ul,
:is(.article-body, .article-page .prose, .blog-article .prose) ol {
  padding-inline-start: 1.5rem;
}

:is(.article-body, .article-page .prose, .blog-article .prose) li + li {
  margin-top: 0.5rem;
}

.article-body a:not([class*="btn"]):not([class*="button"]),
.prose a:not([class*="btn"]):not([class*="button"]) {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

:is(.article-body, .article-page .prose, .blog-article .prose) pre {
  max-width: 100%;
  margin: 1.25rem 0;
  padding: 1.25rem;
  overflow-x: auto;
  border-radius: var(--r-md);
  background: var(--bg-panel);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: var(--blog-meta-size);
  line-height: 1.8;
  white-space: pre;
  overflow-wrap: normal;
}

:is(.article-body, .article-page .prose, .blog-article .prose) code {
  font-family: var(--font-mono);
}

:is(.article-body, .article-page .prose, .blog-article .prose) :not(pre) > code {
  padding: 0.125rem 0.3rem;
  border-radius: var(--r-sm);
  background: var(--bg-panel-2);
  color: var(--text);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

:is(.article-body, .article-page .prose, .blog-article .prose) blockquote {
  margin: 1.25rem 0;
  padding: 1rem 1.25rem;
  border-inline-start: var(--blog-note-width) solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-panel);
  color: var(--text-muted);
}

:is(.article-body, .article-page .prose, .blog-article .prose) blockquote > :last-child {
  margin-bottom: 0;
}

:is(.article-body, .article-page .prose, .blog-article .prose) img,
:is(.article-body, .article-page .prose, .blog-article .prose) video,
:is(.article-body, .article-page .prose, .blog-article .prose) svg {
  max-width: 100%;
}

:is(.article-body, .article-page .prose, .blog-article .prose) .table-scroll {
  max-width: 100%;
  margin-block: 1.25rem;
  overflow-x: auto;
}

:is(.article-body, .article-page .prose, .blog-article .prose) table {
  display: block;
  width: 100%;
  max-width: 100%;
  margin-block: 1.25rem;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: var(--blog-body-size);
}

:is(.article-body, .article-page .prose, .blog-article .prose) th,
:is(.article-body, .article-page .prose, .blog-article .prose) td {
  min-width: 7em;
  padding: 0.75rem 1rem;
  border: var(--blog-rule-width) solid var(--border);
  text-align: start;
  vertical-align: top;
}

:is(.article-body, .article-page .prose, .blog-article .prose) th {
  background: var(--bg-panel);
  color: var(--text);
}

.download-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  margin-block: 2rem;
  padding: var(--blog-card-pad);
  border: var(--blog-rule-width) solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg-panel);
  color: var(--text);
}

.download-note > div {
  min-width: 0;
}

.download-note h2,
.article-body .download-note h2,
.prose .download-note h2 {
  margin: 0 0 0.75rem;
  font-size: var(--blog-h2-size);
  line-height: 1.45;
}

.download-note p,
.article-body .download-note p,
.prose .download-note p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
}

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

#related-posts {
  display: grid;
  grid-template-columns: repeat(2, minmax(300px, 1fr));
  gap: 1.25rem;
  margin-block: 2rem;
}

#related-posts > .related-heading {
  grid-column: 1 / -1;
  margin: 0;
  font-size: var(--blog-h2-size);
  line-height: 1.45;
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  margin-block: 2rem 3rem;
}

#post-nav .post-nav-card {
  display: block;
  padding: 1.25rem;
  border: var(--blog-rule-width) solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg);
  color: var(--text);
  text-decoration: none;
  overflow-wrap: anywhere;
}

#post-nav .post-nav-card:hover {
  background: var(--bg-panel);
}

#post-nav .post-nav-label {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
  font-size: var(--blog-meta-size);
  line-height: 1.6;
}

#post-nav .post-nav-title {
  display: block;
  color: var(--accent);
  font-size: var(--blog-body-size);
  line-height: 1.7;
}

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

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

@media (max-width: 700px) {
  .blog-post-grid,
  #related-posts,
  #post-nav {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .blog-main {
    padding-block: 1.5rem 3rem;
  }

  .blog-hero {
    padding-block: 1rem 2rem;
  }

  .blog-hero h1 {
    font-size: 1.875rem;
  }

  .article-hero h1 {
    font-size: 1.5rem;
  }

  .download-note {
    align-items: flex-start;
  }
}