:root {
  --blog-reading-width: 56rem;
  --blog-gutter: clamp(1.5rem, 4vw, 2rem);
  --blog-body-size: 1rem;
  --blog-body-leading: 1.85;
  --blog-list-title-size: clamp(2rem, 5vw, 3rem);
  --blog-article-title-size: clamp(1.85rem, 4.5vw, 2.6rem);
  --blog-h2-size: clamp(1.25rem, 3vw, 1.6rem);
  --blog-h3-size: clamp(1.1rem, 2.5vw, 1.3rem);
  --blog-card-title-size: 1.25rem;
  --blog-small-size: 0.875rem;
  --blog-title-tracking: -0.015em;
  --blog-rule-width: 4px;
  --blog-rule-thin: 1px;
  --blog-gap: 1.5rem;
  --blog-section-gap: 2.5rem;
  --blog-transition: 180ms;
  --blog-hover-rise: -2px;
  --blog-ink: var(--text);
  --blog-on-ink: var(--bg-panel);
  --blog-rule-color: var(--accent);
  --blog-tint: color-mix(in srgb, var(--accent) 9%, var(--bg-panel));
  --blog-success-tint: color-mix(in srgb, var(--success) 9%, var(--bg-panel));
  --blog-warning-tint: color-mix(in srgb, var(--warn) 10%, var(--bg-panel));
  --blog-promo-start: var(--accent-dark);
  --blog-promo-end: color-mix(in srgb, var(--accent-dark) 80%, var(--text));
  --blog-on-promo: var(--bg-panel);
  --blog-soft-shadow: 0 12px 48px color-mix(in srgb, var(--accent) 10%, transparent);
  --blog-focus: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent);
}

.blog-column,
.article-hero,
.reading-wrap,
.breadcrumbs,
#related-posts,
#post-nav {
  box-sizing: border-box;
  width: 100%;
  max-width: calc(var(--blog-reading-width) + var(--blog-gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
  min-width: 0;
}

.blog-column h1,
.article-hero h1,
.article-body h1,
.article-body h2,
.article-body h3,
.prose h1,
.prose h2,
.prose h3,
.article-card h2,
.article-card h3,
#related-posts h2 {
  font-family: var(--font-display);
  font-weight: var(--weight-medium);
  letter-spacing: var(--blog-title-tracking);
  text-wrap: pretty;
  overflow-wrap: break-word;
}

.breadcrumbs {
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumbs li {
  min-width: 0;
  overflow-wrap: anywhere;
}

.breadcrumbs li + li::before {
  content: "→";
  margin-right: 0.75rem;
  color: var(--text-muted);
}

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

.blog-list-hero,
.article-hero {
  padding-block: 1rem 1.75rem;
  background: none;
  border: none;
  border-radius: var(--radius-tiny);
  box-shadow: none;
}

.blog-list-hero::before,
.article-hero::before {
  content: "";
  display: block;
  width: 100%;
  height: var(--blog-rule-width);
  margin-bottom: 1.5rem;
  background: var(--blog-rule-color);
}

.blog-list-hero h1 {
  margin: 0.75rem 0 1rem;
  font-size: var(--blog-list-title-size);
  line-height: 1.25;
}

.article-hero h1 {
  margin: 1rem 0;
  font-size: var(--blog-article-title-size);
  line-height: 1.35;
}

.blog-lead,
.article-summary,
.article-hero > p:last-child {
  margin: 0;
  padding-bottom: 1.5rem;
  border-bottom: var(--blog-rule-thin) solid var(--border);
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--blog-small-size);
  line-height: 1.6;
}

.article-meta .tag {
  padding: 0.15rem 0.6rem;
  border: var(--blog-rule-thin) solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-panel-2);
  color: var(--text);
  white-space: normal;
}

.article-hero .article-meta > time,
.article-hero .article-meta > .read-time,
.article-hero .article-meta > .reading-time {
  padding: 0.15rem 0.6rem;
  border: var(--blog-rule-thin) solid var(--border);
  border-radius: var(--radius-sm);
}

.blog-catalogue {
  padding-block: 0.5rem var(--blog-section-gap);
}

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

.blog-filters button {
  min-height: 44px;
  padding: 0.5rem 0.875rem;
  border: var(--blog-rule-thin) solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-small-size);
  cursor: pointer;
  transition: border-color var(--blog-transition), background var(--blog-transition);
}

.blog-filters button:hover {
  border-color: var(--accent);
}

.blog-filters button[aria-pressed="true"] {
  border-color: var(--accent-dark);
  background: var(--blog-tint);
  color: var(--accent-dark);
}

.blog-filters button:focus-visible,
.article-card a:focus-visible,
.post-nav-card:focus-visible,
.promo-block a:focus-visible {
  outline: var(--blog-rule-thin) solid var(--accent-dark);
  outline-offset: 3px;
  box-shadow: var(--blog-focus);
}

.blog-status {
  margin: 1rem 0;
  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: var(--blog-gap);
}

.article-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1.5rem;
  border: var(--blog-rule-thin) solid var(--border);
  border-top: var(--blog-rule-width) solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-panel);
  box-shadow: var(--blog-soft-shadow);
  transition: transform var(--blog-transition), border-color var(--blog-transition);
}

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

.article-card h2,
.article-card h3 {
  margin: 1rem 0 0.75rem;
  font-size: var(--blog-card-title-size);
  line-height: 1.55;
}

.article-card h2 a,
.article-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.article-card h2 a:hover,
.article-card h3 a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

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

.article-link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--accent-dark);
  font-size: var(--blog-small-size);
  text-decoration: underline;
  text-underline-offset: 0.3em;
}

.blog-empty {
  grid-column: 1 / -1;
  padding: 1.5rem;
  border: var(--blog-rule-thin) dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  line-height: var(--blog-body-leading);
}

.reading-wrap.prose,
.reading-wrap.article-body,
.article-body,
.prose {
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
  color: var(--text);
}

.reading-wrap.prose,
.reading-wrap.article-body {
  padding-top: 0;
}

.article-body p,
.prose p {
  margin-block: 0 1.25rem;
}

.article-body h2,
.prose h2,
#related-posts > h2 {
  margin-block: 2.25rem 1rem;
  font-size: var(--blog-h2-size);
  line-height: 1.5;
  scroll-margin-top: var(--anchor-offset);
}

.article-body h2::before,
.prose h2::before,
#related-posts > h2::before {
  content: "";
  display: inline-block;
  width: 1.25rem;
  height: var(--blog-rule-width);
  margin-right: 0.65rem;
  background: var(--accent);
  vertical-align: middle;
  border-radius: var(--radius-tiny);
}

.article-body > h2:first-child,
.prose > h2:first-child,
.article-body > section:first-child > h2:first-child,
.prose > section:first-child > h2:first-child {
  margin-top: 0.75rem;
}

.article-body h3,
.prose h3 {
  margin-block: 1.5rem 0.75rem;
  font-size: var(--blog-h3-size);
  line-height: 1.55;
}

.article-body ul,
.article-body ol,
.prose ul,
.prose ol {
  padding-left: 1.5rem;
  margin-block: 0.75rem 1.5rem;
}

.article-body li,
.prose li {
  margin-bottom: 0.5rem;
}

.article-body a,
.prose a {
  color: var(--accent-dark);
  text-underline-offset: 0.2em;
  overflow-wrap: anywhere;
}

.article-body img,
.prose img,
.article-body svg,
.prose svg {
  max-width: 100%;
}

.article-body code,
.prose code {
  padding: 0.1em 0.3em;
  border-radius: var(--radius-tiny);
  background: var(--bg-panel-2);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.article-body pre,
.prose pre {
  position: relative;
  max-width: 100%;
  margin-block: 1.5rem;
  padding: 2.75rem 1.25rem 1.25rem;
  overflow-x: auto;
  border: var(--blog-rule-thin) solid var(--text-muted);
  border-radius: var(--radius);
  background: var(--blog-ink);
  color: var(--blog-on-ink);
  line-height: 1.75;
}

.article-body pre::before,
.prose pre::before {
  content: "VPNQA / 配置记录";
  position: absolute;
  top: 0.65rem;
  left: 1.25rem;
  color: var(--blog-on-ink);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
}

.article-body pre code,
.prose pre code {
  display: block;
  padding: 0;
  background: none;
  color: inherit;
  white-space: pre;
  overflow-wrap: normal;
}

.article-body blockquote,
.prose blockquote,
.verdict {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-left: var(--blog-rule-width) solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--blog-tint);
  color: var(--text);
}

.verdict strong:first-child {
  color: var(--accent-dark);
}

.callout {
  position: relative;
  margin-block: 1.5rem;
  padding: 1.25rem 1.25rem 1.25rem 3.5rem;
  border-left: var(--blog-rule-width) solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--blog-tint);
  color: var(--text);
}

.callout::before {
  content: "i";
  position: absolute;
  top: 1.35rem;
  left: 1rem;
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: var(--blog-rule-thin) solid currentColor;
  border-radius: var(--radius-round);
  color: var(--accent-dark);
  text-align: center;
  font-family: var(--font-mono);
  line-height: 1.5rem;
}

.callout.warning,
.callout-warning {
  border-left-color: var(--warn);
  background: var(--blog-warning-tint);
}

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

.callout.success,
.callout-success {
  border-left-color: var(--success);
  background: var(--blog-success-tint);
}

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

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

.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: var(--blog-rule-thin) solid var(--border);
  border-top: var(--blog-rule-width) solid var(--accent);
  border-radius: var(--radius);
  background: var(--blog-tint);
}

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

.stat-num {
  display: block;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: var(--weight-medium);
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.stat-label {
  display: block;
  margin-top: 0.5rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
}

.prose .check-list,
.article-body .check-list,
.check-list {
  list-style: none;
  padding: 0;
  margin-block: 1.5rem;
}

.check-list li {
  padding: 0.875rem 1rem;
  border: var(--blog-rule-thin) solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
}

.check-list li:nth-child(even) {
  background: var(--bg-panel-2);
}

.article-body .table-scroll,
.prose .table-scroll {
  max-width: 100%;
  margin-block: 1.5rem;
  overflow-x: auto;
  border: var(--blog-rule-thin) solid var(--border);
  border-radius: var(--radius);
}

.article-body table,
.prose table {
  width: 100%;
  margin-block: 1.5rem;
  border-collapse: collapse;
  font-size: var(--blog-small-size);
  line-height: 1.75;
}

.article-body .table-scroll table,
.prose .table-scroll table {
  margin: 0;
}

.article-body th,
.article-body td,
.prose th,
.prose td {
  padding: 0.875rem 1rem;
  border-bottom: var(--blog-rule-thin) solid var(--border);
  text-align: left;
  vertical-align: top;
}

.article-body thead,
.prose thead {
  background: var(--bg-panel-2);
  color: var(--text);
}

.article-body tbody tr:nth-child(even),
.prose tbody tr:nth-child(even) {
  background: var(--bg-panel);
}

.article-body tbody tr:hover,
.prose tbody tr:hover {
  background: var(--blog-tint);
}

.promo-block {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-block: 2rem;
  padding: 1.75rem;
  border: var(--blog-rule-thin) solid var(--accent-dark);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, var(--blog-promo-start), var(--blog-promo-end));
  color: var(--blog-on-promo);
  box-shadow: var(--blog-soft-shadow);
}

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

.promo-copy {
  min-width: 0;
  flex: 1 1 16rem;
}

.promo-brand {
  margin: 0 0 0.5rem;
  color: var(--blog-on-promo);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: var(--weight-medium);
}

.promo-copy p:last-child {
  margin: 0;
  color: var(--blog-on-promo);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
}

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

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

.promo-block .btn-secondary {
  border-color: var(--blog-on-promo);
  background: none;
  color: var(--blog-on-promo);
}

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

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

.post-nav-card {
  display: block;
  min-width: 0;
  padding: 1.25rem;
  border: var(--blog-rule-thin) solid var(--border);
  border-top: var(--blog-rule-width) solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--text);
  text-decoration: none;
  transition: transform var(--blog-transition), border-color var(--blog-transition);
}

.post-nav-card:hover {
  border-top-color: var(--accent);
  transform: translateY(var(--blog-hover-rise));
}

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

.post-nav-label,
.post-nav-card time {
  display: block;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
}

.post-nav-card strong {
  display: block;
  margin-block: 0.5rem;
  font-weight: var(--weight-medium);
  line-height: 1.7;
  overflow-wrap: anywhere;
}

#related-posts {
  padding-block: 1.25rem 2.5rem;
}

#related-posts > h2 {
  margin-top: 0;
}

.related-grid .article-card {
  padding: 1.25rem;
}

@media (max-width: 860px) {
  .article-body table,
  .prose table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }

  .article-body .table-scroll table,
  .prose .table-scroll table {
    display: table;
    width: 100%;
    min-width: 36rem;
    max-width: none;
  }
}

@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 {
    padding: 1.25rem;
  }

  .promo-block {
    padding: 1.5rem;
  }

  .promo-actions {
    width: 100%;
  }

  .promo-actions .btn {
    flex: 1 1 auto;
  }
}

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

  .article-card:hover,
  .article-card:focus-within,
  .post-nav-card:hover {
    transform: none;
  }
}