.blog-hero {
  padding-top: clamp(4rem, 9vw, 7.5rem);
  padding-bottom: clamp(3.5rem, 7vw, 6rem);
  border-bottom: 1px solid var(--color-border);
}

.blog-hero h1 {
  max-width: 12ch;
  margin-top: 0.75rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.5vw, 3.6rem); /* 2026-08-13 用户打回「字太大」:88px 超 72px 硬上限 */
  font-weight: 400;
  line-height: 1.04;
  letter-spacing: -0.045em;
  color: var(--color-text);
}

.blog-hero-copy {
  max-width: 44rem;
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.8;
  color: var(--color-muted);
}

.blog-index-section {
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

.blog-index-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.blog-index-head h2 {
  margin-top: 0.5rem;
  margin-bottom: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  font-weight: 400;
  color: var(--color-text);
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-filter-button {
  appearance: none;
  min-height: 2.5rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-muted);
  font: inherit;
  cursor: pointer;
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    color 160ms ease;
}

.tag-filter-button:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

.tag-filter-button.active {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-panel);
}

.tag-filter-button:focus-visible,
.article-card a:focus-visible,
.related-card a:focus-visible,
.post-nav-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

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

.article-card {
  display: flex;
  min-width: 0;
  min-height: 20rem;
  flex-direction: column;
  padding: clamp(1.4rem, 3vw, 2.2rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: 0 0.5rem 1.5rem var(--color-shadow-light);
  transition:
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.article-card:hover {
  transform: translateY(-0.2rem);
  border-color: var(--color-accent);
  box-shadow: 0 0.8rem 2rem var(--color-shadow);
}

.article-card-meta,
.related-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-muted);
}

.article-card-meta .tag,
.related-card-meta .tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

.article-card h3 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  font-weight: 400;
  line-height: 1.4;
}

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

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

.article-card p {
  margin: 0 0 1.5rem;
  line-height: 1.8;
  color: var(--color-muted);
}

.article-card-link {
  margin-top: auto;
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}

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

.blog-empty,
.blog-noscript {
  padding: 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel-soft);
  color: var(--color-muted);
  text-align: center;
}

.post-breadcrumb {
  margin-top: 1.5rem;
  padding-top: 0.25rem;
}

.post-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.post-breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.post-breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--color-muted-light);
}

.post-breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
}

.post-breadcrumb a:hover {
  color: var(--color-accent);
}

.post-hero {
  padding-top: clamp(3rem, 7vw, 6rem);
  padding-bottom: clamp(3rem, 7vw, 5.5rem);
  border-bottom: 1px solid var(--color-border);
}

.post-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-muted);
}

.post-hero-meta .tag {
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

.post-hero h1 {
  max-width: 19ch;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem); /* 同上:76.8px 超上限 */
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.04em;
  color: var(--color-text);
}

.post-summary {
  max-width: 48rem;
  margin: 1.5rem 0 0;
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.8;
  color: var(--color-muted);
}

.post-body {
  padding-top: clamp(3.5rem, 7vw, 6rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.prose {
  font-size: 1.04rem;
  line-height: 1.95;
  color: var(--color-text);
}

.prose h2 {
  margin-top: 3.75rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3vw, 2.3rem);
  font-weight: 400;
  line-height: 1.3;
  color: var(--color-text);
}

.prose h3 {
  margin-top: 2.5rem;
  margin-bottom: 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-text);
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre {
  margin-top: 0;
  margin-bottom: 1.5rem;
}

.prose ul,
.prose ol {
  padding-left: 1.5rem;
}

.prose li {
  margin-bottom: 0.55rem;
}

.prose a {
  color: var(--color-accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.prose code {
  padding: 0.12em 0.35em;
  border-radius: var(--radius-xs);
  background: var(--color-panel-soft);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.prose pre {
  max-width: 100%;
  padding: 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-accent-black);
  color: var(--color-cold-line);
}

.prose pre code {
  padding: 0;
  background: transparent;
  color: inherit;
  overflow-wrap: normal;
}

.prose blockquote {
  margin-left: 0;
  padding: 0.5rem 0 0.5rem 1.25rem;
  border-left: 3px solid var(--color-accent);
  color: var(--color-muted);
}

.prose img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.end-download-card {
  margin-top: 4rem;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
}

.end-download-card h2 {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 400;
  color: var(--color-accent-dark);
}

.end-download-card p {
  max-width: 42rem;
  margin: 0;
  line-height: 1.8;
  color: var(--color-muted);
}

.end-download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

#related-posts {
  margin-top: 4.5rem;
  padding-top: 3.5rem;
  border-top: 1px solid var(--color-border);
}

#related-posts > h2 {
  margin: 0 0 1.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 400;
  color: var(--color-text);
}

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

.related-card {
  min-width: 0;
  padding: 1.4rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.related-card h3 {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.5;
}

.related-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.94rem;
  line-height: 1.75;
}

.post-navigation {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.post-nav-card {
  display: flex;
  min-width: 0;
  min-height: 8rem;
  flex-direction: column;
  justify-content: center;
  padding: 1.3rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  color: var(--color-text);
  text-decoration: none;
  transition:
    border-color 160ms ease,
    background-color 160ms ease;
}

.post-nav-card:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.post-nav-label {
  margin-bottom: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-muted);
}

.post-nav-card strong {
  font-weight: 500;
  line-height: 1.5;
}

.dl-fab {
  position: fixed;
  right: max(1rem, var(--gutter));
  bottom: 1rem;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.8rem;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-panel);
  box-shadow: 0 0.7rem 1.8rem var(--color-shadow);
  font-weight: 600;
  text-decoration: none;
}

.dl-fab:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

.dl-fab-icon {
  display: inline-flex;
  width: 1.2rem;
  height: 1.2rem;
}

.dl-fab-icon svg {
  width: 100%;
  height: 100%;
}

@media (max-width: 56rem) {
  .blog-index-head {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .article-card {
    min-height: 0;
  }
}

@media (max-width: 38rem) {
  .blog-hero {
    padding-top: 3rem;
  }

  .tag-filter {
    width: 100%;
  }

  .tag-filter-button {
    flex: 1 1 auto;
  }

  .post-navigation {
    grid-template-columns: 1fr;
  }

  .end-download-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .end-download-actions .button {
    justify-content: center;
  }

  .dl-fab {
    right: 1rem;
    bottom: 1rem;
  }
}

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

  .article-card:hover {
    transform: none;
  }
}