:root {
  --blog-column: 56rem;
  --blog-gutter: 1.5rem;
  --blog-radius: var(--r-md);
  --blog-gap: 1.25rem;
  --blog-breath: 1.5rem;
  --blog-section-gap: 2.5rem;
  --blog-body-size: 1rem;
  --blog-body-leading: 1.9;
  --blog-title-size: clamp(1.75rem, 4vw, 2.6rem);
  --blog-index-title-size: clamp(2rem, 4.5vw, 3rem);
  --blog-h2-size: clamp(1.25rem, 2.5vw, 1.6rem);
  --blog-h3-size: clamp(1.1rem, 2vw, 1.3rem);
  --blog-caption-size: 0.8125rem;
  --blog-small-size: 0.9rem;
  --blog-tracking: -0.015em;
  --blog-title-leading: 1.4;
  --blog-stamp-size: 5.5rem;
  --blog-stamp-angle: -11deg;
  --blog-stamp-inset: 1.25rem;
  --blog-stamp-reserve: 7rem;
  --blog-rule: 1px;
  --blog-rule-heavy: 3px;
  --blog-focus-width: 3px;
  --blog-focus-offset: 4px;
  --blog-lift: -3px;
  --blog-transition: 160ms ease;
  --blog-hero-tone: color-mix(in srgb, var(--panel-2) 65%, var(--panel));
  --blog-accent-tint: color-mix(in srgb, var(--accent) 7%, var(--panel));
  --blog-warning-tint: color-mix(in srgb, var(--warn) 9%, var(--panel));
  --blog-success-tint: color-mix(in srgb, var(--success) 8%, var(--panel));
  --blog-promo-end: color-mix(in srgb, var(--accent-dark) 36%, var(--text));
  --blog-radius-pill: var(--r-pill);
  --blog-promo-shadow: 0 14px 42px var(--tint-10);
  --blog-stamp-radius: var(--r-circle);
}

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

.blog-shell > .breadcrumbs,
.blog-shell > .promo-block {
  width: 100%;
  max-width: none;
}

.blog-shell > .article-hero {
  width: calc(100% + 2 * var(--blog-gutter));
  max-width: none;
  margin-inline: calc(-1 * var(--blog-gutter));
}

.reading-wrap {
  width: 100%;
  max-width: calc(var(--blog-column) + 2 * var(--blog-gutter));
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

.breadcrumbs {
  padding-top: var(--blog-breath);
  padding-bottom: var(--blog-breath);
  color: var(--muted);
  font-family: var(--f-body);
  font-size: var(--blog-caption-size);
  line-height: 1.8;
}

.blog-shell > .breadcrumbs {
  padding-inline: 0;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

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

.article-hero {
  position: relative;
  isolation: isolate;
  padding-block: 2rem;
  padding-inline: var(--blog-gutter);
  margin-bottom: 1.75rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--blog-radius);
  background: var(--blog-hero-tone);
  box-shadow: inset 0 1px 0 var(--hi);
  text-align: left;
}

.article-hero::after {
  content: "VW\A 访问手记";
  position: absolute;
  z-index: -1;
  top: var(--blog-stamp-inset);
  right: var(--blog-stamp-inset);
  display: grid;
  place-content: center;
  width: var(--blog-stamp-size);
  height: var(--blog-stamp-size);
  box-sizing: border-box;
  border: var(--blog-rule) solid var(--accent-dark);
  outline: var(--blog-rule) solid var(--accent-dark);
  outline-offset: -0.4rem;
  border-radius: var(--blog-stamp-radius);
  color: var(--accent-dark);
  font-family: var(--f-mono);
  font-size: var(--blog-caption-size);
  font-weight: var(--weight-bold);
  line-height: 1.7;
  letter-spacing: 0.05em;
  white-space: pre;
  text-align: center;
  transform: rotate(var(--blog-stamp-angle));
  pointer-events: none;
}

.article-hero h1,
.article-hero h2,
.article-card h2,
.article-card h3,
.prose h1,
.prose h2,
.prose h3,
[data-article-body] h1,
[data-article-body] h2,
[data-article-body] h3,
#related-posts h2,
.promo-block h2 {
  display: block;
  text-wrap: pretty;
  word-break: normal;
  overflow-wrap: anywhere;
  letter-spacing: var(--blog-tracking);
  font-family: var(--f-display);
}

.article-hero h1 {
  max-width: 100%;
  padding-inline-end: var(--blog-stamp-reserve);
  margin: 1.25rem 0 1rem;
  color: var(--text);
  font-size: var(--blog-title-size);
  font-weight: var(--weight-display);
  line-height: var(--blog-title-leading);
}

.blog-index-hero h1 {
  font-size: var(--blog-index-title-size);
}

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

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

.article-hero .article-meta {
  padding-inline-end: var(--blog-stamp-reserve);
}

.article-meta > span,
.article-meta > time {
  max-width: 100%;
  padding: 0.3rem 0.65rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--blog-radius-pill);
  overflow-wrap: anywhere;
  white-space: normal;
}

.article-meta .blog-category,
.article-hero .article-meta .badge {
  border-color: var(--text);
  background: var(--text);
  color: var(--panel);
}

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

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

.blog-filters button {
  min-height: 2.75rem;
  padding: 0.55rem 1rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--blog-radius-pill);
  background: var(--panel);
  color: var(--muted);
  font-family: var(--f-body);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: background var(--blog-transition), border-color var(--blog-transition);
}

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

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

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

.blog-post-grid > :last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.article-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1.5rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--blog-radius);
  background: var(--panel);
  box-shadow: inset 0 1px 0 var(--hi), var(--shadow-small);
  color: var(--text);
  opacity: 1;
  visibility: visible;
  transition: transform var(--blog-transition), border-color var(--blog-transition);
}

.article-card h2,
.article-card h3 {
  margin-block: 1rem 0.75rem;
  font-size: var(--blog-h3-size);
  line-height: 1.65;
}

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

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

.blog-read-link {
  align-self: flex-start;
  margin-top: auto;
  padding-block: 0.5rem;
  color: var(--accent-dark);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-semi);
  text-underline-offset: 0.25em;
}

.blog-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 2rem;
  border: var(--blog-rule) dashed var(--border);
  border-radius: var(--blog-radius);
  background: var(--panel);
  color: var(--muted);
  line-height: 1.9;
}

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

.prose h2,
[data-article-body] h2 {
  margin-block: 2.25rem 1rem;
  font-size: var(--blog-h2-size);
  line-height: 1.6;
  counter-increment: wear-chapter;
}

.prose h2::before,
[data-article-body] h2::before {
  content: counter(wear-chapter, decimal-leading-zero);
  display: inline-block;
  margin-inline-end: 0.7rem;
  padding: 0.1rem 0.4rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--muted);
  font-family: var(--f-mono);
  font-size: var(--blog-caption-size);
  font-weight: var(--weight-medium);
  vertical-align: middle;
}

.prose h3,
[data-article-body] h3 {
  margin-block: 1.5rem 0.75rem;
  font-size: var(--blog-h3-size);
  line-height: 1.65;
}

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

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

.prose ul,
.prose ol,
[data-article-body] ul,
[data-article-body] ol {
  padding-inline-start: 1.5rem;
  margin-block: 1rem 1.5rem;
}

.prose li,
[data-article-body] li {
  margin-block: 0.5rem;
}

.prose a,
[data-article-body] a {
  color: var(--accent-dark);
  text-decoration-thickness: var(--blog-rule);
  text-underline-offset: 0.2em;
}

.prose strong,
[data-article-body] strong {
  color: var(--text);
  font-weight: var(--weight-bold);
}

.prose :not(pre) > code,
[data-article-body] :not(pre) > code {
  padding: 0.15em 0.35em;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--text);
  font-family: var(--f-mono);
  font-size: var(--blog-small-size);
  overflow-wrap: anywhere;
}

.prose pre,
[data-article-body] pre {
  position: relative;
  max-width: 100%;
  box-sizing: border-box;
  margin-block: 1.5rem;
  padding: 3rem 1.5rem 1.5rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--blog-radius);
  background: var(--text);
  color: var(--panel);
  font-family: var(--f-mono);
  font-size: var(--blog-small-size);
  line-height: 1.8;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.prose pre::before,
[data-article-body] pre::before {
  content: "VPNWEAR / TERMINAL";
  position: absolute;
  top: 0.8rem;
  left: 1.5rem;
  color: var(--panel-2);
  font-family: var(--f-mono);
  font-size: var(--blog-caption-size);
  letter-spacing: 0.06em;
}

.prose pre code,
[data-article-body] pre code {
  background: none;
  color: inherit;
  font: inherit;
  white-space: inherit;
  overflow-wrap: inherit;
}

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

.prose table,
[data-article-body] table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.prose th,
.prose td,
[data-article-body] th,
[data-article-body] td {
  min-width: 7rem;
  padding: 0.85rem 1rem;
  border-bottom: var(--blog-rule) solid var(--border);
  text-align: left;
  vertical-align: top;
}

.prose thead th,
[data-article-body] thead th {
  background: var(--text);
  color: var(--panel);
  font-weight: var(--weight-semi);
}

.prose tbody tr:nth-child(even),
[data-article-body] tbody tr:nth-child(even) {
  background: var(--panel-2);
}

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

.callout,
.prose blockquote,
[data-article-body] blockquote {
  position: relative;
  margin: 1.5rem 0;
  padding: 1.25rem 1.25rem 1.25rem 3.5rem;
  border: var(--blog-rule) solid var(--border);
  border-inline-start: var(--blog-rule-heavy) solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--blog-accent-tint);
  color: var(--text);
  font-style: normal;
}

.callout::before,
.prose blockquote::before,
[data-article-body] blockquote::before {
  content: "i";
  position: absolute;
  top: 1.3rem;
  left: 1rem;
  display: inline-grid;
  place-content: center;
  width: 1.4rem;
  height: 1.4rem;
  border: var(--blog-rule) solid currentColor;
  border-radius: var(--r-circle);
  color: var(--accent-dark);
  font-family: var(--f-mono);
  font-size: var(--blog-caption-size);
  font-weight: var(--weight-bold);
}

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

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

.callout > :last-child,
.prose blockquote > :last-child,
[data-article-body] 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: 1.4rem;
  border: var(--blog-rule) solid var(--border);
  border-top: var(--blog-rule-heavy) solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--blog-accent-tint);
}

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

.stat-num {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--text);
  font-family: var(--f-mono);
  font-size: var(--blog-h2-size);
  font-weight: var(--weight-bold);
  line-height: 1.5;
}

.stat-label {
  display: block;
  color: var(--muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.prose .check-list,
[data-article-body] .check-list,
.check-list {
  display: grid;
  gap: 0.65rem;
  margin-block: 1.5rem;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: 0.9rem 1rem;
  border: var(--blog-rule) solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel);
}

.verdict {
  margin-block: 1.5rem;
  padding: 1.15rem 1.4rem;
  border-inline-start: var(--blog-rule-heavy) solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--blog-accent-tint);
  color: var(--text);
  line-height: var(--blog-body-leading);
}

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

.promo-block {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-block: 2rem;
  padding-block: 1.75rem;
  padding-inline: var(--blog-gutter);
  border: var(--blog-rule) solid var(--accent-dark);
  border-radius: var(--blog-radius);
  background: linear-gradient(125deg, var(--text), var(--blog-promo-end));
  box-shadow: var(--blog-promo-shadow);
  color: var(--panel);
}

.promo-block > div {
  min-width: 0;
}

.promo-block h2 {
  margin: 0 0 0.65rem;
  color: var(--panel);
  font-size: var(--blog-h2-size);
  line-height: 1.6;
}

.promo-block p {
  max-width: 40rem;
  margin: 0;
  color: var(--panel);
  font-size: var(--blog-small-size);
  line-height: 1.9;
}

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

.promo-block .btn-primary {
  border-color: var(--panel);
  background: var(--panel);
  color: var(--text);
}

.promo-block .btn-secondary,
.promo-block .btn-ghost {
  border-color: var(--panel);
  background: var(--clear);
  color: var(--panel);
}

#related-posts {
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

#related-posts:empty,
#post-nav:empty {
  display: none;
}

#related-posts > h2 {
  margin: 0 0 1rem;
  color: var(--text);
  font-size: var(--blog-h2-size);
  line-height: 1.6;
}

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

.related-card {
  padding: 1.15rem;
}

.related-card .article-meta {
  font-size: var(--blog-caption-size);
}

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

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

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

.post-nav-label {
  display: block;
  margin-bottom: 0.65rem;
  color: var(--muted);
  font-family: var(--f-mono);
  font-size: var(--blog-caption-size);
}

.post-nav-card strong {
  display: block;
  color: var(--text);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-semi);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.float-cta {
  position: fixed;
  z-index: 40;
  right: 1.5rem;
  bottom: calc(1.5rem + env(safe-area-inset-bottom, 0px));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  max-width: calc(100vw - 3rem);
  min-height: 3rem;
  box-sizing: border-box;
  padding: 0.75rem 1.25rem;
  border: var(--blog-rule) solid var(--text);
  border-radius: var(--blog-radius-pill);
  background: var(--text);
  color: var(--panel);
  box-shadow: var(--shadow-small);
  font-family: var(--f-body);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-semi);
  line-height: 1.5;
  text-decoration: none;
}

.float-cta svg {
  flex: 0 0 auto;
  width: 1.15rem;
  height: 1.15rem;
  fill: none;
  stroke: currentColor;
}

.float-cta:not(:has(svg))::before {
  content: "↗";
  font-family: var(--f-mono);
}

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

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

.blog-shell a:focus-visible,
.blog-shell button:focus-visible,
.reading-wrap a:focus-visible,
.article-hero a:focus-visible,
.breadcrumbs a:focus-visible,
#related-posts a:focus-visible,
#post-nav a:focus-visible,
.float-cta:focus-visible {
  outline: var(--blog-focus-width) solid var(--accent);
  outline-offset: var(--blog-focus-offset);
}

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

  .blog-filters button:not([aria-pressed="true"]):hover {
    background: var(--panel-2);
    border-color: var(--muted);
  }

  .promo-block .btn-primary:hover {
    background: var(--panel-2);
    color: var(--text);
  }

  .promo-block .btn-ghost:hover,
  .promo-block .btn-secondary:hover {
    background: var(--panel);
    color: var(--text);
  }
}

@media (max-width: 860px) {
  .related-grid {
    grid-template-columns: 1fr;
  }

  .prose table,
  [data-article-body] table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }
}

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

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

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

  .article-hero {
    padding-top: 7.25rem;
    padding-bottom: 1.5rem;
  }

  .article-hero h1,
  .article-hero .article-meta {
    padding-inline-end: 0;
  }

  .article-hero::after {
    top: 1rem;
    right: 1.25rem;
  }

  .article-card {
    padding: 1.25rem;
  }

  .promo-block {
    align-items: flex-start;
  }

  .float-cta {
    right: 1rem;
    bottom: calc(0.75rem + env(safe-area-inset-bottom, 0px));
    max-width: calc(100vw - 2rem);
    min-height: 2.75rem;
    padding: 0.6rem 1rem;
  }

  body:has(.float-cta) {
    padding-bottom: calc(5rem + env(safe-area-inset-bottom, 0px));
    scroll-padding-bottom: 5rem;
  }
}

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

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