:root {
  --blog-reading: 56rem;
  --blog-gutter: max(1.5rem, var(--gutter));
  --blog-title-tracking: -0.015em;
  --blog-rule-width: 0.25rem;
  --blog-lift: -0.15rem;
  --blog-rule-gradient: linear-gradient(to bottom, var(--accent), var(--lane-2));
  --blog-promo-gradient: linear-gradient(115deg, var(--accent-dark), var(--accent));
}

.blog-index,
.reading-wrap,
.article-hero,
.blog-rule-hero,
.breadcrumbs {
  box-sizing: border-box;
  min-width: 0;
}

.blog-index {
  padding-bottom: 2.5rem;
}

.blog-index-page,
.blog-article-page {
  color: var(--text);
  background-color: var(--bg);
  font-family: var(--font-body);
}

.blog-skip {
  position: fixed;
  inset-block-start: 0.75rem;
  inset-inline-start: var(--blog-gutter);
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--accent-dark);
  box-shadow: var(--shadow-soft);
  transform: translateY(-180%);
}

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

.blog-index :focus-visible,
.reading-wrap :focus-visible,
.article-hero :focus-visible,
.breadcrumbs :focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.reading-wrap,
.article-hero,
.blog-rule-hero,
.breadcrumbs {
  width: 100%;
  max-width: calc(var(--blog-reading) + var(--blog-gutter) + var(--blog-gutter));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

.breadcrumbs {
  margin-top: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.blog-index > .breadcrumbs {
  max-width: none;
  padding-inline: 0;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li {
  min-width: 0;
}

.breadcrumbs li + li::before {
  content: "›";
  margin-inline-end: 0.65rem;
  color: var(--muted);
}

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

.blog-index h1,
.article-hero h1,
.blog-rule-hero h1,
.prose h1,
.prose h2,
.prose h3,
.article-card__title,
.related-heading {
  display: block;
  font-family: var(--font-display);
  font-weight: var(--weight-heading);
  letter-spacing: var(--blog-title-tracking);
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

.blog-index-hero {
  position: relative;
  padding: 2rem var(--blog-gutter);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.blog-index-hero::before {
  content: "";
  position: absolute;
  inset-block: 1rem;
  inset-inline-start: 0.65rem;
  width: var(--blog-rule-width);
  border-radius: var(--r-pill);
  background: var(--blog-rule-gradient);
}

.blog-kicker {
  margin: 0 0 0.75rem;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.blog-index-hero h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.3;
}

.blog-index-hero > p:last-child {
  max-width: 44rem;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.9;
}

.blog-library {
  margin-block: 2rem;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.blog-filters button {
  min-height: 2.75rem;
  padding: 0.6rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

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

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

.blog-filters button:active {
  background: var(--accent-dark);
  color: var(--on-accent);
}

.blog-status {
  min-height: 1.8em;
  margin-block: 1rem;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.8;
}

.article-grid,
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.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(--r-md);
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow-sheet);
  opacity: 1;
  visibility: visible;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

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

.article-card__meta,
.article-meta,
.article-hero__meta,
.blog-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.article-card__meta time {
  font-family: var(--font-mono);
}

.article-card .tag,
.article-hero .tag,
.blog-rule-hero .tag {
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--accent);
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.article-card__title {
  margin: 1rem 0 0.75rem;
  color: var(--text);
  font-size: 1.3rem;
  line-height: 1.55;
}

.article-card__title a {
  color: inherit;
  text-decoration: none;
}

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

.article-card__summary {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
  overflow-wrap: anywhere;
}

.article-card__read {
  align-self: flex-start;
  margin-top: auto;
  color: var(--accent);
  font-size: 0.9375rem;
  font-weight: var(--weight-heading);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.blog-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 1.5rem;
  border: 1px dashed var(--border-deep);
  border-radius: var(--r-md);
  background: var(--panel-2);
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.9;
}

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

.article-hero,
.blog-rule-hero {
  position: relative;
  isolation: isolate;
  padding-block: 2rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--panel);
  box-shadow: var(--shadow-window);
}

.article-hero::before,
.blog-rule-hero::before {
  content: "";
  position: absolute;
  inset-block: 1.1rem;
  inset-inline-start: 0.6rem;
  width: var(--blog-rule-width);
  border-radius: var(--r-pill);
  background: var(--blog-rule-gradient);
  pointer-events: none;
}

.article-hero h1,
.blog-rule-hero h1,
.prose h1 {
  margin: 1rem 0;
  color: var(--text);
  font-size: clamp(1.75rem, 3.6vw, 2.6rem);
  line-height: 1.4;
}

.article-hero > p,
.blog-rule-hero > p,
.article-hero__summary,
.article-summary {
  margin-block: 1rem 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.article-meta > time,
.article-meta > span,
.article-hero__meta > time,
.article-hero__meta > span,
.blog-meta > time,
.blog-meta > span {
  display: inline-block;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--border-deep);
  border-radius: var(--r-pill);
  background: var(--panel-2);
  color: var(--text);
}

.article-hero .article-meta > .tag,
.article-hero .article-hero__meta > .tag,
.blog-rule-hero .blog-meta > .tag {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.reading-wrap {
  padding-block: 1.75rem 0;
}

.prose {
  max-width: var(--blog-reading);
  margin-inline: auto;
  min-width: 0;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

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

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre,
.prose .table-scroll,
.prose .stat-grid,
.prose .verdict {
  margin-block: 1.25rem;
}

.prose h2 {
  position: relative;
  margin: 2.5rem 0 1rem;
  padding-top: 0.75rem;
  color: var(--text);
  font-size: clamp(1.3rem, 2.6vw, 1.6rem);
  line-height: 1.5;
}

.prose h2::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 0;
  width: 2rem;
  height: 0.2rem;
  border-radius: var(--r-pill);
  background: var(--accent);
}

.prose h3 {
  margin: 1.75rem 0 0.75rem;
  color: var(--text);
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  line-height: 1.6;
}

.prose a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
  overflow-wrap: anywhere;
}

.prose a:hover {
  color: var(--accent);
}

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

.prose li {
  margin-block: 0.45rem;
}

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

.prose strong {
  font-weight: var(--weight-heading);
}

.prose hr {
  margin-block: 2rem;
  border: 0;
  border-top: 1px solid var(--border);
}

.prose mark,
.prose .hl {
  padding-inline: 0.15em;
  background: var(--marker);
  color: var(--text);
}

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

.prose img,
.prose video {
  height: auto;
  border-radius: var(--r-sm);
}

.prose figure {
  max-width: 100%;
  margin: 1.5rem 0;
}

.prose figcaption {
  margin-top: 0.6rem;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.8;
}

.prose :not(pre) > code {
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.9em;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.prose pre {
  position: relative;
  box-sizing: border-box;
  max-width: 100%;
  padding: 2.75rem 1.25rem 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--text);
  border-radius: var(--r-md);
  background: var(--text);
  color: var(--panel);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.85;
  tab-size: 2;
}

.prose pre::before {
  content: "VPNVZ / 配置片段";
  position: absolute;
  inset-block-start: 0.7rem;
  inset-inline-start: 1.25rem;
  color: var(--marker);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}

.prose pre code {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  white-space: pre;
  overflow-wrap: normal;
  word-break: normal;
}

.prose .table-scroll {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  overscroll-behavior-inline: contain;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.prose caption {
  padding: 0.75rem 1rem;
  color: var(--text);
  font-weight: var(--weight-heading);
  text-align: start;
}

.prose th,
.prose td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: start;
  vertical-align: top;
  word-break: keep-all;
  overflow-wrap: normal;
}

.prose thead th {
  background: var(--accent-dark);
  color: var(--on-accent);
  font-weight: var(--weight-heading);
}

.prose tbody th {
  color: var(--text);
  font-weight: var(--weight-heading);
}

.prose tbody tr:nth-child(even) {
  background: var(--panel-2);
}

.prose tbody tr:hover {
  background: var(--accent-wash);
}

.prose blockquote,
.prose .callout {
  position: relative;
  padding: 1.25rem 1.25rem 1.25rem 3.25rem;
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--accent-wash);
  color: var(--text);
}

.prose blockquote::before,
.prose .callout::before {
  content: "i";
  position: absolute;
  inset-block-start: 1.35rem;
  inset-inline-start: 1rem;
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 1px solid var(--accent);
  border-radius: var(--r-circle);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: var(--weight-heading);
  line-height: 1.25rem;
  text-align: center;
}

.prose .callout--warning,
.prose .callout.warning {
  border-inline-start-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 12%, var(--panel));
}

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

.prose .callout--success,
.prose .callout.success {
  border-inline-start-color: var(--success);
  background: color-mix(in srgb, var(--success) 10%, var(--panel));
}

.prose .callout--success::before,
.prose .callout.success::before {
  content: "✓";
  border-color: var(--success);
  color: var(--success);
}

.prose blockquote > :first-child,
.prose .callout > :first-child,
.prose .verdict > :first-child {
  margin-top: 0;
}

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

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

.stat-card {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--r-md);
  background: var(--accent-wash);
  box-shadow: var(--shadow-sheet);
}

.stat-card:nth-child(even) {
  border-top-color: var(--marker-fold);
  background: color-mix(in srgb, var(--marker) 23%, var(--panel));
}

.stat-num {
  display: block;
  color: var(--accent-dark);
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  overflow-wrap: anywhere;
}

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

.stat-label {
  display: block;
  margin-top: 0.5rem;
  color: var(--text);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.prose .check-list {
  display: grid;
  gap: 0.75rem;
  padding: 0;
  list-style: none;
}

.prose .check-list li {
  margin: 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel);
  list-style: none;
}

.verdict {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--panel-2);
  color: var(--text);
}

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

.blog-promo,
.reading-wrap .promo-block,
.prose + .promo-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-block: 2rem;
  padding: 1.75rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-md);
  background: var(--blog-promo-gradient);
  color: var(--on-accent);
  box-shadow: var(--shadow-soft);
}

.blog-promo .promo-block__brand,
.reading-wrap .promo-block .promo-block__brand {
  color: var(--on-accent);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: var(--weight-heading);
}

.blog-promo .promo-block__copy p,
.reading-wrap .promo-block .promo-block__copy p {
  margin: 0.6rem 0 0;
  color: var(--on-accent);
  font-size: 1rem;
  line-height: 1.8;
}

.blog-promo__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.blog-promo .btn-primary,
.reading-wrap .promo-block .btn-primary {
  border-color: var(--panel);
  background: var(--panel);
  color: var(--accent-dark);
}

.blog-promo .btn-primary:hover,
.reading-wrap .promo-block .btn-primary:hover {
  background: var(--marker);
  border-color: var(--marker);
  color: var(--text);
}

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

.blog-promo .btn-secondary:hover,
.reading-wrap .promo-block .btn-secondary:hover {
  background: var(--accent-dark);
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-block: 1.5rem;
  padding-block: 0.5rem;
}

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

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

.post-nav-card:hover,
.post-nav-card:focus-visible {
  border-color: var(--accent);
  color: var(--accent-dark);
  transform: translateY(var(--blog-lift));
}

.post-nav-card__label {
  color: var(--accent-dark);
  font-size: 0.875rem;
}

.post-nav-card__title {
  font-size: 1rem;
  font-weight: var(--weight-heading);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.post-nav-card__date {
  margin-top: auto;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

#related-posts {
  margin-block: 1.5rem 2rem;
  padding-block: 0.5rem 1rem;
}

.related-heading {
  margin: 0 0 1rem;
  color: var(--text);
  font-size: 1.5rem;
  line-height: 1.5;
}

.related-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.related-card {
  padding: 1.15rem;
}

.related-card .article-card__title {
  font-size: 1.1rem;
}

.related-card .article-card__summary {
  font-size: 0.9375rem;
}

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

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

  .prose .table-scroll table {
    display: table;
    width: 100%;
    min-width: 38rem;
    max-width: none;
    overflow: visible;
  }

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

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

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

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

  .article-card {
    padding: 1.25rem;
  }

  .blog-index-hero,
  .article-hero,
  .blog-rule-hero {
    padding-block: 1.5rem;
  }

  .article-hero,
  .blog-rule-hero {
    width: 100%;
  }

  .blog-filters {
    gap: 0.5rem;
  }

  .blog-filters button {
    padding-inline: 0.85rem;
  }

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

  .blog-promo__actions {
    width: 100%;
  }

  .blog-promo__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

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

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