:root {
  --blog-card-gap: 1.25rem;
  --blog-reading-gap: 1.5rem;
  --blog-transition-fast: 160ms ease;
  --blog-line-soft: var(--color-border);
  --blog-link-color: var(--color-accent-dark);
  --blog-focus-color: var(--color-accent);
  --blog-surface: var(--color-panel);
  --blog-surface-alt: var(--color-panel-alt);
  --blog-muted: var(--color-text-muted);
  --blog-ink: var(--color-text);
}

.blog-page {
  min-height: 70vh;
  background: var(--color-bg);
}

.blog-list-hero {
  padding-block: clamp(3.5rem, 8vw, 6.5rem);
  background:
    radial-gradient(circle at 16% 20%, var(--color-accent-soft), transparent 36%),
    radial-gradient(circle at 86% 30%, var(--color-panel-alt), transparent 34%),
    var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.blog-list-hero .wrap {
  display: grid;
  gap: 1rem;
}

.blog-eyebrow,
.blog-section-kicker {
  width: fit-content;
  color: var(--color-accent-dark);
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.blog-list-hero h1 {
  max-width: 100%;
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 3rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.blog-list-hero p {
  max-width: 47rem;
  margin: 0;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.8;
}

.blog-list-section {
  padding-block: clamp(3.5rem, 7vw, 6rem);
}

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

.blog-list-heading > div {
  display: grid;
  gap: 0.5rem;
}

.blog-list-heading h2 {
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 2.5vw, 2.25rem);
  line-height: 1.25;
}

.blog-result-count {
  flex: 0 0 auto;
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-bottom: 2rem;
}

.blog-filter-button {
  min-height: 2.5rem;
  padding: 0.625rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 650;
  cursor: pointer;
  transition:
    color var(--blog-transition-fast),
    border-color var(--blog-transition-fast),
    background-color var(--blog-transition-fast),
    transform var(--blog-transition-fast);
}

.blog-filter-button:hover {
  border-color: var(--color-border-strong);
  color: var(--color-accent-dark);
  transform: translateY(-1px);
}

.blog-filter-button:focus-visible {
  outline: 3px solid var(--blog-focus-color);
  outline-offset: 3px;
}

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

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

.article-card {
  display: flex;
  min-width: 0;
  min-height: 19rem;
  flex-direction: column;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--blog-transition-fast),
    border-color var(--blog-transition-fast),
    box-shadow var(--blog-transition-fast);
}

.article-card:nth-child(4n + 2),
.article-card:nth-child(4n + 3) {
  background: var(--color-panel-alt);
}

.article-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}

.article-card-meta,
.related-post-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

.article-card-meta time,
.related-post-meta time {
  flex: 0 0 auto;
  font-variant-numeric: tabular-nums;
}

.article-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  line-height: 1.45;
  letter-spacing: -0.018em;
}

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

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

.article-card p {
  margin: 1rem 0 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.article-card-more {
  width: fit-content;
  margin-top: auto;
  color: var(--color-accent-dark);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  text-decoration: none;
}

.article-card-more:hover {
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

.blog-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 2rem;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-panel-alt);
  color: var(--color-text-muted);
  text-align: center;
}

/* 博客文章页紧凑首屏节奏 */
.article-page {
  background: var(--color-bg);
}

.article-head {
  padding: 0 var(--gutter) 2.25rem;
}

.article-head-inner,
.article-body,
.article-afterword {
  width: min(var(--reading-width), calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
}

.article-head-inner {
  padding-top: 1.25rem;
}

.blog-breadcrumb,
nav.breadcrumb,
nav.breadcrumbs,
main nav[aria-label] {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1.25rem;
  overflow: hidden;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  line-height: 1.4;
  white-space: nowrap;
}

main > .reading-wrap:first-child,
main > .wrap:first-child,
main > nav.reading-wrap:first-child {
  padding-top: 2rem;
}

.blog-breadcrumb a,
nav.breadcrumb a,
nav.breadcrumbs a,
main nav[aria-label] a {
  flex: 0 0 auto;
  color: var(--color-text-muted);
  opacity: 0.6;
  text-decoration: none;
  transition: color var(--blog-transition-fast);
}

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

.blog-breadcrumb .breadcrumb-separator,
nav.breadcrumb .breadcrumb-separator,
nav.breadcrumbs .breadcrumb-separator {
  flex: 0 0 auto;
  color: var(--color-text-muted);
  opacity: 0.35;
}

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

.article-hero {
  padding-block: 0 2.25rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem 0.875rem;
  margin-bottom: 0.875rem;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.article-meta time {
  font-variant-numeric: tabular-nums;
}

.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);
  line-height: 1.32;
  letter-spacing: -0.025em;
}

.article-lead {
  max-width: 100%;
  margin: 0.9rem 0 0;
  color: var(--color-text-muted);
  font-size: clamp(0.9375rem, 0.85rem + 0.45vw, 1.125rem);
  line-height: 1.7;
}

.article-body {
  padding-bottom: 2.5rem;
}

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

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

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

.prose p {
  margin: 0 0 1.25rem;
}

.prose h2 {
  margin: 2.75rem 0 1rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 1.15rem + 0.55vw, 1.5rem);
  line-height: 1.4;
  letter-spacing: -0.015em;
}

.prose > h2:first-of-type {
  margin-top: 0;
}

.prose h3 {
  margin: 2rem 0 0.75rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 1.02rem + 0.35vw, 1.25rem);
  line-height: 1.45;
}

.prose > section {
  margin: 0 0 2.5rem;
  padding: 0;
}

.prose > section + section {
  margin-top: 0;
}

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

.prose ul,
.prose ol {
  margin: 0 0 1.5rem;
  padding-left: 1.5rem;
}

.prose li {
  margin-bottom: 0.5rem;
  padding-left: 0.2rem;
}

.prose li::marker {
  color: var(--color-accent);
}

.prose a:not([class*="btn"]):not([class*="button"]) {
  color: var(--blog-link-color);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--color-border-strong);
  text-underline-offset: 0.2rem;
}

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

.prose blockquote {
  margin: 1.75rem 0;
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--color-panel-alt);
  color: var(--color-text-muted);
}

.prose blockquote p:last-child {
  margin-bottom: 0;
}

.prose code {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel-alt);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.prose :not(pre) > code {
  padding: 0.12em 0.38em;
}

.prose pre {
  max-width: 100%;
  margin: 1.5rem 0;
  padding: 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-text);
  color: var(--color-panel);
  box-shadow: var(--shadow-soft);
  line-height: 1.65;
}

.prose pre code {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.prose table {
  width: 100%;
  margin: 1.5rem 0;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.prose th,
.prose td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--color-panel-alt);
  font-family: var(--font-display);
}

.prose tr:last-child td {
  border-bottom: 0;
}

.end-download-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin: 2.75rem 0 0;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel-alt);
  box-shadow: var(--shadow-card);
}

.end-download-card > div:first-child {
  min-width: 0;
}

.end-download-card h3 {
  margin: 0 0 0.5rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.4;
}

.end-download-card p {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.end-download-card .actions {
  flex: 0 0 auto;
  margin: 0;
}

.article-afterword {
  padding-block: 2.5rem 5rem;
  border-top: 1px solid var(--color-border);
}

#related-posts {
  margin-bottom: 2.5rem;
}

.related-posts-title {
  margin: 0 0 1.25rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2vw, 1.5rem);
  line-height: 1.4;
}

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

.related-post-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  color: var(--color-text);
  text-decoration: none;
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--blog-transition-fast),
    border-color var(--blog-transition-fast),
    box-shadow var(--blog-transition-fast);
}

.related-post-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.related-post-meta {
  margin-bottom: 0.875rem;
}

.related-post-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.5;
}

.related-post-card p {
  display: -webkit-box;
  margin: 0.75rem 0 1rem;
  overflow: hidden;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.related-post-more {
  margin-top: auto;
  color: var(--color-accent-dark);
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
}

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

.post-nav-card {
  display: grid;
  min-width: 0;
  gap: 0.5rem;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  color: var(--color-text);
  text-decoration: none;
  transition:
    border-color var(--blog-transition-fast),
    background-color var(--blog-transition-fast);
}

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

.post-nav-label {
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

.post-nav-card strong {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  line-height: 1.55;
}

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

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

@media (max-width: 820px) {
  .blog-article-grid {
    grid-template-columns: 1fr;
  }

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

  .related-posts-grid {
    grid-template-columns: repeat(2, minmax(300px, 1fr));
    overflow-x: auto;
    padding-bottom: 0.5rem;
  }
}

@media (max-width: 680px) {
  .blog-list-hero {
    padding-block: 3.25rem;
  }

  .blog-list-hero h1 {
    font-size: clamp(1.75rem, 8vw, 1.875rem);
  }

  .blog-list-section {
    padding-block: 3rem;
  }

  .blog-list-heading {
    align-items: start;
  }

  .blog-filter {
    flex-wrap: nowrap;
    margin-inline: calc(var(--gutter) * -1);
    padding-inline: var(--gutter);
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .blog-filter-button {
    flex: 0 0 auto;
  }

  .article-head {
    padding-inline: 0;
  }

  .article-head-inner,
  .article-body,
  .article-afterword {
    width: calc(100% - (var(--gutter) * 2));
  }

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

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

  .prose {
    font-size: 0.96875rem;
  }

  .prose pre {
    margin-inline: calc(var(--gutter) * -0.5);
    border-radius: var(--radius-md);
  }

  .prose table {
    display: block;
    overflow-x: auto;
  }

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

  .end-download-card .actions {
    display: flex;
    flex-wrap: wrap;
  }

  .related-posts-grid {
    grid-template-columns: 1fr;
    overflow: visible;
  }

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

  .post-nav-next,
  .post-nav-previous + .post-nav-next {
    grid-column: 1;
    text-align: left;
  }

  .article-afterword {
    padding-block: 2.25rem 4rem;
  }
}

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