:root {
  --blog-type-title: clamp(1.5rem, 1.1rem + 1.4vw, 2rem);
  --blog-type-list-title: clamp(1.75rem, 2.4vw + 1rem, 3rem);
  --blog-type-lead: clamp(0.9375rem, 0.85rem + 0.45vw, 1.125rem);
  --blog-type-h2: 1.5rem;
  --blog-type-h3: 1.25rem;
  --blog-type-meta: 0.8125rem;
  --blog-type-body: 1rem;
  --blog-type-small: 0.875rem;
  --blog-dialog-width: 32rem;
  --blog-dialog-duration: 0.18s;
  --blog-crumb-link-opacity: 0.75;
  --blog-crumb-separator-opacity: 0.35;
}

.blog-list-main,
.blog-list-main *,
.article-body,
.article-body *,
.related-post-grid,
.related-post-grid *,
#post-nav,
#post-nav * {
  box-sizing: border-box;
  min-width: 0;
}

.blog-skip {
  position: absolute;
  inset-block-start: 0.5rem;
  inset-inline-start: 1rem;
  z-index: 100;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  padding: 0.75rem 1rem;
  background: var(--text);
  color: var(--on-dark);
  font-family: var(--font-body);
  border-radius: var(--radius);
}

.blog-skip:focus {
  width: auto;
  height: auto;
  overflow: visible;
  clip-path: none;
}

.blog-list-hero {
  padding-block: 3.5rem 2.5rem;
  background: var(--bg);
  color: var(--text);
}

.blog-list-hero .eyebrow {
  margin: 0 0 1.25rem;
  font-family: var(--font-mono);
  font-size: var(--blog-type-meta);
  font-weight: var(--weight-normal);
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.blog-list-hero h1 {
  display: block;
  max-width: 100%;
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--blog-type-list-title);
  font-weight: var(--weight-normal);
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.blog-list-lead {
  margin: 1.25rem 0 0;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-type-lead);
  line-height: 1.7;
}

.blog-catalog {
  padding-block: 0 4rem;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-block: 1.25rem;
  border-block: 1px solid var(--border);
}

.blog-filter {
  min-height: 2.75rem;
  padding: 0.625rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-type-small);
  line-height: 1.5;
  cursor: pointer;
  transition: border-color var(--transition-fast) var(--ease),
    color var(--transition-fast) var(--ease);
}

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

.blog-filter.is-active,
.blog-filter[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-dark);
}

.blog-result-status {
  margin: 1.25rem 0;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: var(--blog-type-meta);
  line-height: 1.7;
}

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

.blog-post-grid .post-card,
#related-posts .post-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
}

.post-card .post-meta,
.article-hero .post-meta,
.article-hero .article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.875rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: var(--blog-type-meta);
  font-weight: var(--weight-normal);
  line-height: 1.7;
}

.post-card .tag,
.article-hero .tag {
  display: inline-block;
  max-width: 100%;
  padding: 0.125rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-type-meta);
  white-space: normal;
  overflow-wrap: anywhere;
}

.post-card .post-title {
  display: block;
  max-width: 100%;
  margin: 1rem 0 0.875rem;
  font-family: var(--font-display);
  font-size: var(--blog-type-h3);
  font-weight: var(--weight-normal);
  line-height: 1.5;
  overflow-wrap: anywhere;
}

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

.post-card .post-title a:hover {
  color: var(--accent-dark);
}

.post-card .post-summary {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-type-small);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.post-card .post-read-link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--accent-dark);
  font-family: var(--font-body);
  font-size: var(--blog-type-small);
  line-height: 1.7;
  text-underline-offset: 0.2em;
}

.blog-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding-block: 1.5rem;
  color: var(--text-muted);
  font-family: var(--font-body);
  line-height: 1.8;
}

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

/* 面包屑别名共享同一套紧凑单行布局。 */
.blog-breadcrumb,
nav.breadcrumb,
nav.breadcrumbs {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  margin-top: 1.5rem;
  margin-bottom: 1.25rem;
  padding-block: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-type-meta);
  line-height: 1.7;
  white-space: nowrap;
}

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

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

.blog-breadcrumb [aria-hidden="true"],
nav.breadcrumb [aria-hidden="true"],
nav.breadcrumbs [aria-hidden="true"] {
  flex: 0 0 auto;
  color: var(--text-muted);
  opacity: var(--blog-crumb-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;
  color: var(--text-muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.blog-breadcrumb.section,
nav.breadcrumb.section,
nav.breadcrumbs.section {
  padding-top: 0;
  padding-bottom: 0;
}

.section:has(> .blog-breadcrumb),
.section:has(> nav.breadcrumb),
.section:has(> nav.breadcrumbs),
main.section:has(.article-hero) {
  padding-top: 1.5rem;
  padding-bottom: 2rem;
}

.section > .blog-breadcrumb,
.section > nav.breadcrumb,
.section > nav.breadcrumbs {
  margin-top: 0;
}

.article-hero,
.article-hero.section {
  padding-block: 0 2rem;
  background: var(--bg);
  color: var(--text);
}

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

main.reading:has(> .breadcrumb),
main.reading:has(> nav[aria-label] + article) {
  padding-top: 32px;
}

main.reading > .breadcrumb {
  margin-top: 0;
}

main.reading > article > h1,
main.reading > article > header > h1 {
  font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2rem);
  line-height: 1.4;
}

.article-hero h1 {
  display: block;
  width: 100%;
  max-width: 100%;
  margin-block: 1rem;
  font-family: var(--font-display);
  font-size: var(--blog-type-title);
  font-weight: var(--weight-normal);
  line-height: 1.32;
  overflow-wrap: anywhere;
}

.article-hero .article-lead,
.article-hero .lead,
.article-hero > p:last-child:not(.post-meta):not(.article-meta) {
  margin-top: 1rem;
  margin-bottom: 0;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-type-lead);
  line-height: 1.7;
}

.article-body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-type-body);
  line-height: 1.85;
  overflow-wrap: anywhere;
}

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

.article-body section,
.article-body section.section,
article.prose section,
article.prose section.section {
  margin-block: 0;
  padding-block: 0;
}

.article-body section + section,
article.prose section + section {
  margin-top: 2rem;
}

.article-body h2,
article.prose h2 {
  display: block;
  max-width: 100%;
  margin: 2rem 0 1rem;
  font-family: var(--font-display);
  font-size: var(--blog-type-h2);
  font-weight: var(--weight-normal);
  line-height: 1.45;
}

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

.article-body h3,
article.prose h3 {
  display: block;
  max-width: 100%;
  margin: 1.5rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: var(--blog-type-h3);
  font-weight: var(--weight-normal);
  line-height: 1.5;
}

.article-body p,
.article-body ul,
.article-body ol,
article.prose p,
article.prose ul,
article.prose ol {
  margin-block: 0 1rem;
}

.article-body ul,
.article-body ol,
article.prose ul,
article.prose ol {
  padding-inline-start: 1.5rem;
}

.article-body li + li,
article.prose li + li {
  margin-top: 0.375rem;
}

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

.article-body code,
article.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-panel);
  color: var(--text);
  border-radius: var(--radius);
  overflow-wrap: anywhere;
}

.article-body pre,
article.prose pre {
  max-width: 100%;
  margin-block: 1.25rem;
  padding: 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: var(--blog-type-small);
  line-height: 1.75;
  white-space: pre;
  overflow-wrap: normal;
}

.article-body pre code,
article.prose pre code {
  padding: 0;
  font-size: inherit;
  background: var(--clear);
  color: inherit;
  overflow-wrap: normal;
}

.article-body blockquote,
article.prose blockquote {
  margin: 1.25rem 0;
  padding: 0.75rem 1.25rem;
  border-inline-start: 2px solid var(--accent);
  background: var(--bg-panel);
  color: var(--text-muted);
}

.article-body blockquote > :last-child,
article.prose blockquote > :last-child {
  margin-bottom: 0;
}

.article-body table,
.prose table {
  display: block;
  max-width: 100%;
  margin-block: 1.25rem;
  overflow-x: auto;
  border-collapse: collapse;
  background: var(--bg);
  color: var(--text);
  font-size: var(--blog-type-small);
}

.article-body th,
.article-body td,
.prose th,
.prose td {
  min-width: 7em;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  text-align: start;
  vertical-align: top;
  overflow-wrap: normal;
  word-break: normal;
}

.article-body th,
.prose th {
  background: var(--bg-panel);
  color: var(--text);
  font-weight: var(--weight-medium);
}

.dl-card {
  margin-block: 2rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--text);
}

.dl-card h2 {
  display: block;
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: var(--blog-type-h2);
  font-weight: var(--weight-normal);
  line-height: 1.45;
}

.dl-card p {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: var(--blog-type-body);
  line-height: 1.7;
}

.dl-card .download-actions,
.dl-card .article-download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.dl-card > .btn {
  margin-inline-end: 0.5rem;
  margin-block-end: 0.5rem;
}

#related-posts {
  display: block;
  margin-block: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

#related-posts .related-heading {
  display: block;
  margin: 0 0 1.25rem;
  color: var(--text);
  font-family: var(--font-display);
  font-size: var(--blog-type-h2);
  font-weight: var(--weight-normal);
  line-height: 1.45;
}

.related-post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 1rem;
  max-width: var(--reading-width);
}

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

#post-nav .post-nav-link {
  display: block;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--transition-fast) var(--ease);
}

#post-nav .post-nav-link:hover {
  border-color: var(--accent);
}

.post-nav-label {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-type-meta);
  line-height: 1.7;
}

.post-nav-title {
  display: block;
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-type-body);
  line-height: 1.7;
  overflow-wrap: anywhere;
}

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

body.blog-dialog-open {
  overflow: hidden;
}

.blog-download-dialog {
  box-sizing: border-box;
  width: min(var(--blog-dialog-width), calc(100% - 2rem));
  max-width: calc(100% - 2rem);
  max-height: calc(100dvh - 2rem);
  margin: auto;
  padding: 0;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  opacity: 0;
  transform: translateY(0.5rem);
  transition: opacity var(--blog-dialog-duration) var(--ease),
    transform var(--blog-dialog-duration) var(--ease);
}

.blog-download-dialog::backdrop {
  background: var(--veil);
  opacity: 0;
  transition: opacity var(--blog-dialog-duration) var(--ease);
}

.blog-download-dialog.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.blog-download-dialog.is-visible::backdrop {
  opacity: 1;
}

.blog-download-dialog-panel {
  position: relative;
  padding: 4rem 2rem 2rem;
}

.blog-download-dialog-close {
  position: absolute;
  inset-block-start: 0.75rem;
  inset-inline-end: 0.75rem;
  min-height: 2.75rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-type-small);
  cursor: pointer;
}

.blog-download-dialog-close:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.blog-download-dialog-label {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: var(--blog-type-meta);
  letter-spacing: 0.08em;
}

.blog-download-dialog h2 {
  display: block;
  margin: 0 0 1rem;
  color: var(--text);
  font-family: var(--font-display);
  font-size: var(--blog-type-h2);
  font-weight: var(--weight-normal);
  line-height: 1.4;
}

.blog-download-dialog-description {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: var(--blog-type-body);
  line-height: 1.7;
}

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

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

@media (max-width: 767px) {
  .blog-list-hero {
    padding-block: 2.5rem 2rem;
  }

  .blog-list-hero h1 {
    font-size: clamp(1.5rem, 4vw + 0.5rem, 1.875rem);
  }

  .blog-post-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .blog-post-grid .post-card,
  #related-posts .post-card {
    padding: 1.25rem;
  }

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

  .blog-catalog {
    padding-bottom: 3rem;
  }
}

@media (max-width: 639px) {
  #post-nav {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .dl-card {
    padding: 1.25rem;
  }

  .blog-download-dialog-panel {
    padding-inline: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-filter,
  #post-nav .post-nav-link,
  .blog-download-dialog,
  .blog-download-dialog::backdrop {
    transition: none;
  }

  .blog-download-dialog {
    transform: none;
  }
}