.blog-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.blog-hero::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    radial-gradient(circle at 18% 18%, color-mix(in srgb, var(--color-brand) 18%, transparent), transparent 46%),
    radial-gradient(circle at 76% 14%, color-mix(in srgb, var(--color-link) 16%, transparent), transparent 44%),
    radial-gradient(circle at 58% 2%, color-mix(in srgb, var(--color-warning) 13%, transparent), transparent 40%);
  pointer-events: none;
}

.blog-hero__inner {
  text-align: center;
}

.blog-hero h1 {
  max-width: 100%;
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 1.35rem + 2.2vw, 3rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.03em;
}

.blog-hero__lead {
  max-width: 42rem;
  margin: 1.25rem auto 0;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 0.94rem + 0.28vw, 1.125rem);
  line-height: 1.75;
}

.blog-browser {
  padding-block: 1rem var(--section-space);
}

.blog-browser__head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.blog-browser__head h2 {
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 1.25rem + 0.8vw, 2rem);
  line-height: 1.25;
}

.blog-result-count {
  margin: 0;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.blog-filters {
  display: flex;
  gap: 0.625rem;
  padding-block: 0.25rem 1.75rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.blog-filter {
  flex: 0 0 auto;
  min-height: 2.625rem;
  padding-inline: 1.125rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font: 700 0.875rem/1 var(--font-body);
  cursor: pointer;
  transition:
    color 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease;
}

.blog-filter:hover {
  border-color: var(--color-link);
  color: var(--color-text);
}

.blog-filter:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--color-link) 34%, transparent);
  outline-offset: 2px;
}

.blog-filter.is-active {
  border-color: var(--color-brand);
  background: var(--color-brand);
  color: var(--color-surface);
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 21rem), 1fr));
  gap: 1.25rem;
}

.post-card,
.related-card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-large);
  background: var(--color-surface);
  box-shadow: 0 12px 30px color-mix(in srgb, var(--color-text) 8%, transparent);
}

.post-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  padding: clamp(1.25rem, 2vw, 1.75rem);
}

.post-card.card-accent,
.related-card.card-accent {
  border-color: var(--color-brand);
}

.post-card.card-cyan,
.related-card.card-cyan {
  border-color: var(--color-link);
}

.post-card.card-warning,
.related-card.card-warning {
  border-color: var(--color-warning);
}

.post-card__meta,
.related-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding-inline: 0.625rem;
  border: 1px solid color-mix(in srgb, var(--color-brand) 45%, var(--color-line));
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-brand) 8%, var(--color-surface));
  color: var(--color-brand-deep);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 750;
  line-height: 1;
}

.post-card h3 {
  margin: 1.25rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 1rem + 0.45vw, 1.375rem);
  line-height: 1.45;
}

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

.post-card h3 a:hover,
.related-card h3 a:hover {
  color: var(--color-brand-deep);
}

.post-card > p {
  margin: 0.875rem 0 1.25rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.post-card__link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--color-brand-deep);
  font-weight: 750;
  text-decoration: none;
}

.post-card__link::after {
  display: inline-block;
  margin-left: 0.35rem;
  content: "→";
  transition: transform 160ms ease;
}

.post-card__link:hover::after {
  transform: translateX(0.2rem);
}

.blog-empty-state {
  margin: 2rem 0 0;
  padding: 1.5rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-surface-muted);
  color: var(--color-text-muted);
  text-align: center;
}

/* 文章页紧凑头部 */
.article-shell {
  padding-top: 1.25rem;
}

.article-breadcrumb,
.blog-breadcrumb,
nav.breadcrumb,
nav.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
  overflow: hidden;
  color: color-mix(in srgb, var(--color-text-muted) 60%, transparent);
  font-size: 0.8125rem;
  line-height: 1.4;
  white-space: nowrap;
}

.article-breadcrumb a,
.blog-breadcrumb a,
nav.breadcrumb a,
nav.breadcrumbs a {
  flex: 0 0 auto;
  color: color-mix(in srgb, var(--color-text-muted) 70%, transparent);
  text-decoration: none;
}

.article-breadcrumb a:hover,
.blog-breadcrumb a:hover,
nav.breadcrumb a:hover,
nav.breadcrumbs a:hover {
  color: var(--color-brand-deep);
}

.article-breadcrumb .separator,
.blog-breadcrumb .separator,
nav.breadcrumb .separator,
nav.breadcrumbs .separator {
  flex: 0 0 auto;
  color: color-mix(in srgb, var(--color-text-muted) 35%, transparent);
}

.article-breadcrumb [aria-current="page"],
.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;
  color: var(--color-text-muted);
  text-overflow: ellipsis;
}

.article-hero {
  padding-block: 0 2rem;
}

.article-hero--compact {
  padding-bottom: 0.75rem;
}

.article-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem 1rem;
  margin-bottom: 0.875rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.article-hero h1 {
  max-width: 100%;
  margin-block: 0.875rem 0.75rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2rem);
  font-weight: 850;
  line-height: 1.32;
  letter-spacing: -0.02em;
}

.article-hero__lead {
  max-width: var(--reading-width);
  margin-top: 0.75rem;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: clamp(0.9375rem, 0.85rem + 0.45vw, 1.125rem);
  line-height: 1.7;
}

.article-body {
  padding-block: 0 3rem;
}

.article-body > section {
  padding-block: 0;
}

.article-body > section + section {
  margin-top: 2.5rem;
}

.prose {
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.85;
}

.prose h2 {
  max-width: 100%;
  margin: 2.5rem 0 1rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 1.08rem + 0.55vw, 1.5rem);
  line-height: 1.4;
}

.prose > h2:first-child,
.prose > section:first-child > h2:first-child {
  margin-top: 0;
}

.prose h3 {
  max-width: 100%;
  margin: 1.75rem 0 0.75rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.0625rem, 0.98rem + 0.35vw, 1.25rem);
  line-height: 1.45;
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre,
.prose .table-wrap {
  margin-block: 1rem;
}

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

.prose li + li {
  margin-top: 0.5rem;
}

.prose a:not([class*="btn"]):not([class*="button"]) {
  color: var(--color-brand-deep);
  text-decoration-color: color-mix(in srgb, var(--color-brand) 48%, transparent);
  text-underline-offset: 0.2em;
}

.prose a:not([class*="btn"]):not([class*="button"]):hover {
  color: var(--color-link);
}

.prose code {
  border-radius: var(--radius-small);
  background: var(--color-surface-muted);
  color: var(--color-brand-deep);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.prose :not(pre) > code {
  padding: 0.15em 0.4em;
}

.prose pre {
  max-width: 100%;
  padding: 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--color-brand);
  border-radius: var(--radius-medium);
  background: var(--color-ink);
  color: var(--color-ink-text);
}

.prose pre code {
  padding: 0;
  background: none;
  color: inherit;
}

.prose blockquote {
  padding: 0.25rem 0 0.25rem 1.25rem;
  border-left: 3px solid var(--color-warning);
  color: var(--color-text-muted);
}

.article-download {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 1.5rem;
  margin-top: 2.75rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--color-brand);
  border-radius: var(--radius-large);
  background: var(--color-surface);
  box-shadow: 0 12px 30px color-mix(in srgb, var(--color-text) 8%, transparent);
}

.article-download h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.25rem, 1.05rem + 0.5vw, 1.5rem);
}

.article-download p {
  margin: 0;
  color: var(--color-text-muted);
}

.article-download__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.75rem;
}

.article-related {
  margin-top: 2.75rem;
}

.article-related > h2 {
  margin: 0 0 1.25rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 1.08rem + 0.55vw, 1.5rem);
  line-height: 1.4;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18.75rem), 1fr));
  gap: 1rem;
}

.related-card {
  min-width: 0;
  padding: 1.25rem;
}

.related-card h3 {
  margin: 1rem 0 0;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  line-height: 1.5;
}

.related-card p {
  display: -webkit-box;
  margin: 0.75rem 0 0;
  overflow: hidden;
  color: var(--color-text-muted);
  line-height: 1.7;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

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

.post-nav__link {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
  transition:
    border-color 160ms ease,
    transform 160ms ease;
}

.post-nav__link:hover {
  border-color: var(--color-link);
  transform: translateY(-2px);
}

.post-nav__link--next {
  grid-column: 2;
  text-align: right;
}

.post-nav__label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.post-nav__link strong {
  display: block;
  overflow: hidden;
  font-size: 0.9375rem;
  line-height: 1.55;
  text-overflow: ellipsis;
}

@media (max-width: 720px) {
  .blog-hero {
    padding-block: 2.75rem;
  }

  .blog-hero h1 {
    font-size: clamp(1.75rem, 7vw, 1.875rem);
  }

  .blog-browser {
    padding-top: 0;
  }

  .blog-browser__head {
    align-items: start;
  }

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

  .article-shell {
    padding-top: 1.2rem;
  }

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

  .article-download {
    grid-template-columns: 1fr;
  }

  .article-download__actions {
    justify-content: flex-start;
  }

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

  .post-nav__link--next {
    grid-column: 1;
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-filter,
  .post-card__link::after,
  .post-nav__link {
    transition: none;
  }
}