:root {
  --blog-column: 56rem;
  --blog-gutter: var(--gutter, 1.5rem);
  --blog-body-size: 1rem;
  --blog-small-size: 0.875rem;
  --blog-tiny-size: 0.75rem;
  --blog-lead-size: 1.125rem;
  --blog-card-size: 1.25rem;
  --blog-h1-size: clamp(1.8rem, 4vw, 2.6rem);
  --blog-list-h1-size: clamp(2rem, 5vw, 3rem);
  --blog-h2-size: clamp(1.3rem, 3vw, 1.6rem);
  --blog-h3-size: clamp(1.125rem, 2.5vw, 1.3rem);
  --blog-stat-size: clamp(1.5rem, 3vw, 2rem);
  --blog-leading: 1.85;
  --blog-heading-leading: 1.4;
  --blog-tracking: 0;
  --blog-rule-width: 4px;
  --blog-transition: 160ms ease;
  --blog-paper-blue: color-mix(in srgb, var(--accent) 7%, var(--bg-panel));
  --blog-paper-warn: color-mix(in srgb, var(--warn) 10%, var(--bg-panel));
  --blog-paper-success: color-mix(in srgb, var(--success) 9%, var(--bg-panel));
  --blog-paper-alt: color-mix(in srgb, var(--bg-panel-2) 60%, var(--bg-panel));
  --blog-on-dark: var(--bg-panel);
}

.blog-page {
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
}

.blog-page *,
.blog-page *::before,
.blog-page *::after {
  box-sizing: border-box;
}

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

.blog-page .reading-wrap,
.article-hero,
.breadcrumbs,
.breadcrumb,
#related-posts,
#post-nav {
  width: 100%;
  max-width: calc(var(--blog-column) + var(--blog-gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
  box-sizing: border-box;
}

.article-hero .reading-wrap,
.reading-wrap .article-hero,
.reading-wrap .breadcrumbs,
.reading-wrap .breadcrumb,
.reading-wrap #related-posts,
.reading-wrap #post-nav {
  max-width: 100%;
  padding-inline: 0;
}

.blog-page h1,
.blog-page h2,
.blog-page h3,
.article-hero h1,
.prose h2,
.prose h3,
.article-body h2,
.article-body h3,
[data-article-body] h2,
[data-article-body] h3,
#related-posts h2,
#related-posts h3 {
  display: block;
  text-wrap: pretty;
  overflow-wrap: anywhere;
  letter-spacing: var(--blog-tracking);
  line-height: var(--blog-heading-leading);
}

.blog-page h1,
.article-hero h1 {
  font-family: var(--font-display);
  font-size: var(--blog-h1-size);
  font-weight: var(--weight-display);
}

.blog-page a:focus-visible,
.blog-page button:focus-visible,
.article-hero a:focus-visible,
.prose a:focus-visible,
#related-posts a:focus-visible,
#post-nav a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.blog-skip {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-panel);
  color: var(--accent-dark);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  transform: translateY(-200%);
}

.blog-skip:focus {
  transform: none;
}

.breadcrumbs,
.breadcrumb {
  margin-top: 1.5rem;
  margin-bottom: 1.75rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
  line-height: var(--blog-leading);
  overflow-wrap: anywhere;
}

.breadcrumbs ol,
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.65rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.breadcrumbs li + li::before,
.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.65rem;
  color: var(--text-muted);
}

.breadcrumbs a,
.breadcrumb a {
  color: var(--accent-dark);
  text-underline-offset: 0.2em;
}

.blog-list-hero,
.article-hero {
  position: relative;
  padding-block: 0 1.75rem;
  background: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.blog-list-hero::before,
.article-hero::before {
  content: "";
  display: block;
  width: 100%;
  height: var(--blog-rule-width);
  margin-bottom: 1.25rem;
  background: var(--accent);
}

.blog-list-hero::after,
.article-hero::after {
  content: "";
  display: block;
  height: 1px;
  margin-top: 1.75rem;
  background: var(--border);
}

.blog-list-hero h1 {
  margin: 0.65rem 0 1rem;
  font-size: var(--blog-list-h1-size);
}

.blog-kicker {
  margin: 0;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-medium);
}

.blog-lead,
.article-hero .article-summary,
.article-hero .article-deck,
.article-hero .article-excerpt,
.article-hero > p:not(.article-meta):not(.blog-kicker) {
  color: var(--text-muted);
  font-size: var(--blog-lead-size);
  line-height: var(--blog-leading);
  margin-block: 1rem 0;
}

.article-hero h1 {
  margin-block: 1rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
  line-height: 1.6;
}

.article-meta time,
.article-meta .read-time,
.article-meta .reading-time,
.article-meta .article-readtime {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-variant-numeric: tabular-nums;
}

.article-tag,
.article-hero .article-meta .badge {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--on-accent);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-medium);
  overflow-wrap: anywhere;
  white-space: normal;
}

.blog-catalog {
  padding-block: 0 2.5rem;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.blog-filter {
  min-height: 2.75rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: border-color var(--blog-transition), background var(--blog-transition);
}

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

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

.blog-status {
  margin-block: 1rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
}

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

.article-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  box-shadow: var(--shadow-panel);
  transition: border-color var(--blog-transition);
}

.article-card:hover,
.article-card:focus-within {
  border-top-color: var(--accent);
}

.blog-page .article-card-title,
#related-posts .article-card-title {
  margin: 1rem 0 0.65rem;
  padding: 0;
  font-family: var(--font-body);
  font-size: var(--blog-card-size);
  font-weight: var(--weight-bold);
  line-height: 1.6;
}

.article-card-title::before {
  content: none;
}

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

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

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

.article-more {
  align-self: flex-start;
  margin-top: auto;
  color: var(--accent-dark);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-medium);
  text-underline-offset: 0.25em;
}

.blog-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 1.5rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel-2);
  color: var(--text-muted);
  line-height: var(--blog-leading);
}

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

.reading-wrap.prose,
.reading-wrap.article-body,
.reading-wrap[data-article-body] {
  width: 100%;
  max-width: calc(var(--blog-column) + var(--blog-gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
  padding-top: 0.25rem;
  padding-bottom: 1.5rem;
}

:is(.prose, .article-body, [data-article-body]) h2 {
  position: relative;
  margin-block: 2.25rem 1rem;
  padding-top: 0.8rem;
  font-family: var(--font-display);
  font-size: var(--blog-h2-size);
  font-weight: var(--weight-bold);
}

:is(.prose, .article-body, [data-article-body]) h2::before {
  content: "";
  display: block;
  width: 2rem;
  height: 3px;
  margin-bottom: 0.65rem;
  background: var(--accent);
}

:is(.prose, .article-body, [data-article-body]) > h2:first-child,
:is(.prose, .article-body, [data-article-body]) > section:first-child > h2:first-child {
  margin-top: 0.5rem;
}

:is(.prose, .article-body, [data-article-body]) h3 {
  margin-block: 1.75rem 0.75rem;
  font-family: var(--font-body);
  font-size: var(--blog-h3-size);
  font-weight: var(--weight-bold);
}

:is(.prose, .article-body, [data-article-body]) p {
  margin-block: 0 1.2rem;
}

:is(.prose, .article-body, [data-article-body]) :is(ul, ol) {
  margin-block: 0.75rem 1.5rem;
  padding-inline-start: 1.5rem;
}

:is(.prose, .article-body, [data-article-body]) li {
  margin-block: 0.4rem;
}

:is(.prose, .article-body, [data-article-body]) a {
  color: var(--accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

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

:is(.prose, .article-body, [data-article-body]) img {
  height: auto;
  border-radius: var(--radius);
}

:is(.prose, .article-body, [data-article-body]) blockquote {
  margin: 1.5rem 0;
  padding: 1.1rem 1.4rem;
  border-inline-start: 4px solid var(--accent);
  background: var(--blog-paper-blue);
  color: var(--text);
  font-family: var(--font-display);
}

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

.table-scroll {
  width: 100%;
  max-width: 100%;
  margin-block: 1.5rem;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

:is(.prose, .article-body, [data-article-body]) table {
  width: 100%;
  margin-block: 1.5rem;
  border-collapse: collapse;
  font-size: var(--blog-small-size);
  line-height: 1.7;
  text-align: left;
}

:is(.prose, .article-body, [data-article-body]) .table-scroll table {
  margin: 0;
  min-width: 36rem;
}

:is(.prose, .article-body, [data-article-body]) :is(th, td) {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

:is(.prose, .article-body, [data-article-body]) thead th {
  background: var(--text);
  color: var(--blog-on-dark);
  font-weight: var(--weight-medium);
}

:is(.prose, .article-body, [data-article-body]) tbody tr {
  background: var(--bg-panel);
}

:is(.prose, .article-body, [data-article-body]) tbody tr:nth-child(even) {
  background: var(--blog-paper-alt);
}

:is(.prose, .article-body, [data-article-body]) tbody tr:hover {
  background: var(--blog-paper-blue);
}

:is(.prose, .article-body, [data-article-body]) caption {
  padding: 0.65rem 0;
  text-align: left;
  color: var(--text-muted);
}

:is(.prose, .article-body, [data-article-body]) code {
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
}

:is(.prose, .article-body, [data-article-body]) :not(pre) > code {
  padding: 0.15rem 0.35rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-panel-2);
  overflow-wrap: anywhere;
}

:is(.prose, .article-body, [data-article-body]) pre {
  position: relative;
  max-width: 100%;
  margin-block: 1.5rem;
  padding: 3rem 1.25rem 1.25rem;
  border: 1px solid var(--text);
  border-radius: var(--radius);
  background: var(--text);
  color: var(--blog-on-dark);
  overflow-x: auto;
  line-height: 1.8;
  tab-size: 2;
}

:is(.prose, .article-body, [data-article-body]) pre::before {
  content: "VPNNeed / 技术摘录";
  position: absolute;
  top: 0.75rem;
  left: 1.25rem;
  color: var(--blog-on-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-tiny-size);
}

:is(.prose, .article-body, [data-article-body]) pre code {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  white-space: pre;
  overflow-wrap: normal;
}

.callout,
.verdict {
  position: relative;
  margin-block: 1.5rem;
  padding: 1.25rem 1.4rem;
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--blog-paper-blue);
  color: var(--text);
}

.callout {
  padding-inline-start: 3.5rem;
}

.callout::before {
  content: "i";
  position: absolute;
  top: 1.25rem;
  left: 1rem;
  width: 1.5rem;
  height: 1.5rem;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-bold);
  line-height: 1.4rem;
  text-align: center;
}

.callout.warning,
.callout-warning,
.callout--warning {
  border-inline-start-color: var(--warn);
  background: var(--blog-paper-warn);
}

.callout.warning::before,
.callout-warning::before,
.callout--warning::before {
  content: "!";
  color: var(--text);
}

.callout.success,
.callout-success,
.callout--success {
  border-inline-start-color: var(--success);
  background: var(--blog-paper-success);
}

.callout.success::before,
.callout-success::before,
.callout--success::before {
  color: var(--success);
}

.callout > :last-child,
.verdict > :last-child {
  margin-bottom: 0;
}

.verdict > strong:first-child,
.verdict > p:first-child > strong:first-child {
  color: var(--accent-dark);
  font-weight: var(--weight-bold);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  gap: 1rem;
  margin-block: 1.5rem;
}

.stat-card {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  background: var(--blog-paper-blue);
}

.stat-card:nth-child(even) {
  border-top-color: var(--text-muted);
  background: var(--bg-panel-2);
}

.stat-num {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-stat-size);
  font-weight: var(--weight-bold);
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.stat-card:nth-child(even) .stat-num {
  color: var(--text);
}

.stat-label {
  display: block;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
}

:is(.prose, .article-body, [data-article-body]) .check-list {
  list-style: none;
  margin-block: 1.5rem;
  padding: 0;
}

.check-list li {
  list-style: none;
  margin-block: 0.65rem;
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
}

.promo-block {
  width: 100%;
  max-width: calc(var(--blog-column) + var(--blog-gutter) * 2);
  margin: 1.5rem auto 2rem;
  padding: 1.75rem;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  background: var(--blog-paper-blue);
  box-shadow: var(--shadow-panel);
  color: var(--text);
}

.promo-block.reading-wrap {
  width: calc(100% - var(--blog-gutter) * 2);
  max-width: var(--blog-column);
  padding: 1.75rem;
}

.promo-brand {
  display: block;
  color: var(--accent-dark);
  font-family: var(--font-display);
  font-size: var(--blog-h2-size);
  font-weight: var(--weight-bold);
}

.promo-block p {
  margin-block: 0.65rem 1.25rem;
  color: var(--text);
  font-size: var(--blog-body-size);
  line-height: var(--blog-leading);
}

.promo-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.promo-block .btn-primary {
  background: var(--bg-panel);
  border: 1px solid var(--accent);
  color: var(--accent-dark);
}

.promo-block .btn-primary:hover {
  background: var(--accent);
  color: var(--on-accent);
}

.promo-block .btn-ghost {
  background: none;
  border: 1px solid var(--accent);
  color: var(--accent-dark);
}

#related-posts {
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

#related-posts .related-heading {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: var(--blog-h2-size);
}

#related-posts .related-heading::before {
  content: none;
}

.related-card {
  box-shadow: none;
}

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

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

.post-nav-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  gap: 0.65rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--blog-transition);
}

.post-nav-card:hover,
.post-nav-card:focus-visible {
  border-top-color: var(--accent);
}

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

.post-nav-label {
  color: var(--accent-dark);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-medium);
}

.post-nav-title {
  font-size: var(--blog-body-size);
  font-weight: var(--weight-bold);
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.post-nav-date {
  margin-top: auto;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
}

@media (max-width: 860px) {
  :is(.prose, .article-body, [data-article-body]) table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
  }

  :is(.prose, .article-body, [data-article-body]) .table-scroll table {
    display: table;
    width: 100%;
    max-width: none;
    overflow: visible;
  }
}

@media (max-width: 640px) {
  .no-break {
    white-space: normal;
  }

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

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

  .article-card,
  .post-nav-card {
    padding: 1.15rem;
  }

  .promo-block,
  .promo-block.reading-wrap {
    padding: 1.5rem;
  }

  .blog-list-hero,
  .article-hero {
    padding-bottom: 1.25rem;
  }

  .blog-filters {
    gap: 0.45rem;
  }

  .breadcrumbs,
  .breadcrumb {
    margin-top: 1.25rem;
    margin-bottom: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .article-card,
  .blog-filter,
  .post-nav-card,
  .promo-block .btn,
  .blog-skip {
    transition: none;
    animation: none;
  }
}