:root {
  --blog-reading: 56rem;
  --blog-gutter: max(1.5rem, var(--gutter));
  --blog-body-size: 1rem;
  --blog-small-size: 0.875rem;
  --blog-h1: clamp(1.8rem, 4vw, 2.6rem);
  --blog-list-h1: clamp(2rem, 4.5vw, 3rem);
  --blog-h2: clamp(1.3rem, 2.4vw, 1.6rem);
  --blog-h3: clamp(1.1rem, 2vw, 1.3rem);
  --blog-body-leading: 1.9;
  --blog-title-leading: 1.4;
  --blog-tracking: -0.015em;
  --blog-rule: linear-gradient(to bottom, var(--accent), var(--accent-dark));
  --blog-warning-tint: color-mix(in srgb, var(--warn) 12%, var(--panel));
  --blog-success-tint: color-mix(in srgb, var(--success) 10%, var(--panel));
  --blog-hover-tint: color-mix(in srgb, var(--accent) 9%, var(--panel));
  --blog-promo-bg: linear-gradient(125deg, var(--indigo), var(--indigo-lift));
}

.blog-index,
.reading-wrap,
.article-hero,
.blog-hero,
.article-body,
.prose {
  font-family: var(--font-body);
  color: var(--text);
}

.blog-index *,
.reading-wrap *,
.article-hero *,
.blog-hero *,
.article-body *,
.prose * {
  box-sizing: border-box;
}

.blog-index :is(h1, h2, h3),
.article-hero :is(h1, h2, h3),
.blog-hero :is(h1, h2, h3),
.reading-wrap :is(h1, h2, h3),
.article-body :is(h1, h2, h3),
.prose :is(h1, h2, h3) {
  display: block;
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  letter-spacing: var(--blog-tracking);
  text-wrap: pretty;
  overflow-wrap: anywhere;
  line-height: var(--blog-title-leading);
}

.blog-index :is(a, button):focus-visible,
.reading-wrap :is(a, button, summary):focus-visible,
.article-hero a:focus-visible,
.float-cta:focus-visible {
  outline: 3px solid var(--accent-dark);
  outline-offset: 4px;
}

.blog-skip {
  position: fixed;
  top: 0.75rem;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: var(--r-btn);
  background: var(--indigo);
  color: var(--on-dark);
  transform: translateY(-180%);
}

.blog-skip:focus {
  transform: translateY(0);
}

.blog-hero {
  position: relative;
  padding-block: 2.5rem;
  padding-inline: var(--blog-gutter);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--panel-2);
  box-shadow: var(--shadow-soft);
}

.blog-hero::before,
.article-hero::before {
  content: "";
  position: absolute;
  top: 1.25rem;
  bottom: 1.25rem;
  left: 0.55rem;
  width: 0.3rem;
  border-radius: var(--r-pill);
  background: var(--blog-rule);
  pointer-events: none;
}

.blog-kicker {
  display: inline-block;
  margin-bottom: 0.75rem;
  font: var(--weight-medium) var(--blog-small-size) / 1.6 var(--font-mono);
  color: var(--muted);
}

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

.blog-list-hero > p {
  max-width: 44rem;
  margin: 0 0 1.5rem;
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
  color: var(--muted);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  font-size: var(--blog-small-size);
  line-height: 1.6;
  color: var(--muted);
}

.article-meta > :is(time, .badge, .read-time, .reading-time, span) {
  max-width: 100%;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--muted);
  white-space: normal;
  overflow-wrap: anywhere;
}

.article-meta > time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.article-meta > .badge--lav,
.article-meta > .badge--ink {
  border-color: var(--indigo);
  background: var(--indigo);
  color: var(--on-dark);
}

.blog-catalog {
  padding-top: 2.5rem;
}

.blog-catalog-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
  margin-bottom: 1rem;
}

.blog-catalog-heading h2 {
  margin: 0;
  font-size: var(--blog-h2);
}

.blog-results {
  margin: 0;
  font-size: var(--blog-small-size);
  color: var(--muted);
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.blog-filter {
  min-height: 2.75rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--text);
  font: var(--weight-medium) var(--blog-small-size) / 1.5 var(--font-body);
  cursor: pointer;
  transition: background var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

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

.blog-filter[aria-pressed="true"] {
  background: var(--indigo);
  border-color: var(--indigo);
  color: var(--on-dark);
  box-shadow: var(--hl-dark);
}

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

.blog-post-grid > *,
.related-grid > *,
.stat-grid > *,
#post-nav > * {
  min-width: 0;
}

.article-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  transition: border-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.article-card:hover,
.article-card:focus-within {
  border-color: var(--accent-dark);
  transform: translateY(-3px);
}

.article-card h3 {
  margin: 1rem 0 0.75rem;
  font-size: var(--blog-h3);
}

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

.article-card h3 a:hover {
  color: var(--accent-dark);
}

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

.article-read-link {
  align-self: flex-start;
  margin-top: auto;
  padding-block: 0.35rem;
  font-weight: var(--weight-semibold);
  color: var(--accent-dark);
  text-underline-offset: 0.25em;
}

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

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

.reading-wrap :is(.article-hero, .breadcrumbs, .breadcrumb, .reading-wrap) {
  width: 100%;
  max-width: none;
}

.reading-wrap > :is(.article-hero, .breadcrumbs, .breadcrumb),
.reading-wrap > article > .article-hero {
  width: calc(100% + var(--blog-gutter) + var(--blog-gutter));
  margin-inline: calc(0rem - var(--blog-gutter));
}

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

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

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

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

.article-hero {
  position: relative;
  padding-block: 2rem;
  padding-inline: var(--blog-gutter);
  margin-block: 0 1.75rem;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--panel-2);
  box-shadow: var(--shadow-soft);
}

.article-hero h1,
.article-hero .title {
  margin: 1.1rem 0;
  font-size: var(--blog-h1);
  font-weight: var(--weight-heavy);
}

.article-hero > p,
.article-hero .article-summary,
.article-hero .lede {
  margin: 0;
  max-width: none;
  color: var(--muted);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
  overflow-wrap: anywhere;
}

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

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

.article-body :is(h2, h3),
.prose :is(h2, h3) {
  scroll-margin-top: var(--anchor-space);
}

.article-body h2,
.prose h2 {
  margin: 2.25rem 0 1rem;
  font-size: var(--blog-h2);
}

.article-body h2::before,
.prose h2::before {
  content: "";
  display: inline-block;
  width: 1.1rem;
  height: 0.22rem;
  margin-right: 0.65rem;
  border-radius: var(--r-pill);
  background: var(--accent-dark);
  vertical-align: middle;
}

.article-body h3,
.prose h3 {
  margin: 1.75rem 0 0.65rem;
  font-size: var(--blog-h3);
}

.article-body :is(p, ul, ol),
.prose :is(p, ul, ol) {
  margin-block: 0 1.15rem;
}

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

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

.article-body a,
.prose a {
  color: var(--accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.article-body :is(strong, b),
.prose :is(strong, b) {
  font-weight: var(--weight-bold);
}

.article-body :not(pre) > code,
.prose :not(pre) > code {
  padding: 0.12em 0.35em;
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  white-space: normal;
  overflow-wrap: anywhere;
}

.article-body pre,
.prose pre {
  position: relative;
  max-width: 100%;
  margin: 1.5rem 0;
  padding: 2.75rem 1.25rem 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--indigo-lift);
  border-radius: var(--r-win);
  background: var(--indigo);
  color: var(--on-dark);
  box-shadow: var(--shadow-soft);
  font: var(--blog-small-size) / 1.8 var(--font-mono);
  tab-size: 2;
}

.article-body pre::before,
.prose pre::before {
  content: "VPNName · 配置片段";
  position: absolute;
  top: 0.7rem;
  left: 1.25rem;
  color: var(--on-dark-muted);
  font: var(--blog-small-size) / 1.5 var(--font-mono);
}

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

.article-body .table-scroll,
.prose .table-scroll {
  max-width: 100%;
  margin: 1.5rem 0;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}

.article-body table,
.prose table {
  width: 100%;
  margin: 1.5rem 0;
  border-collapse: collapse;
  background: var(--panel);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.article-body .table-scroll table,
.prose .table-scroll table {
  min-width: 38rem;
  margin: 0;
}

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

.article-body thead th,
.prose thead th {
  background: var(--indigo);
  color: var(--on-dark);
  font-weight: var(--weight-semibold);
}

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

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

.article-body blockquote,
.prose blockquote,
.callout {
  position: relative;
  margin: 1.5rem 0;
  padding: 1.2rem 1.25rem 1.2rem 3.25rem;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent-dark);
  border-radius: var(--r-md);
  background: var(--accent-tint);
  color: var(--text);
}

.article-body blockquote::before,
.prose blockquote::before,
.callout::before {
  content: "i";
  position: absolute;
  top: 1.3rem;
  left: 1rem;
  width: 1.35rem;
  height: 1.35rem;
  border: 1px solid currentColor;
  border-radius: var(--r-circle);
  color: var(--accent-dark);
  text-align: center;
  font: var(--weight-bold) var(--blog-small-size) / 1.35rem var(--font-mono);
}

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

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

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

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

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

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-block: 1.5rem;
}

.stat-card {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: 4px solid var(--accent-dark);
  border-radius: var(--r-panel);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

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

.stat-num {
  display: block;
  margin-bottom: 0.35rem;
  font: var(--weight-bold) var(--blog-h2) / 1.4 var(--font-mono);
  color: var(--text);
  overflow-wrap: anywhere;
}

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

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

.check-list li {
  padding: 1rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--panel);
}

.verdict {
  margin: 1.5rem 0;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent-dark);
  border-radius: var(--r-md);
  background: var(--panel-2);
  color: var(--text);
}

.verdict > strong:first-child {
  font-weight: var(--weight-heavy);
}

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

.promo-block {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem 2rem;
  margin-block: 2.25rem 1.5rem;
  padding: 1.75rem;
  border: 1px solid var(--indigo-lift);
  border-radius: var(--r-card);
  background: var(--blog-promo-bg);
  color: var(--on-dark);
  box-shadow: var(--shadow-card);
}

.promo-block::before {
  content: "";
  position: absolute;
  inset: 0.45rem;
  border: 1px solid var(--indigo-lift);
  border-radius: var(--r-panel);
  pointer-events: none;
}

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

.promo-copy h2 {
  margin: 0 0 0.6rem;
  color: var(--on-dark);
  font-size: var(--blog-h2);
}

.promo-copy h2::before {
  content: none;
}

.promo-copy p {
  margin: 0;
  color: var(--on-dark);
  font-size: var(--blog-body-size);
  line-height: 1.8;
}

.promo-block .btn {
  position: relative;
  border: 1px solid var(--panel);
  background: var(--panel);
  color: var(--indigo);
}

.promo-block .btn--outline {
  background: var(--clear);
  color: var(--on-dark);
}

#related-posts,
#post-nav {
  min-width: 0;
  margin-inline: 0;
}

#related-posts {
  padding-block: 1.5rem;
}

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

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

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

.related-card {
  padding: 1.15rem;
}

.related-card .article-meta {
  gap: 0.4rem;
}

.related-card h3 {
  font-size: var(--blog-h3);
}

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

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--r-panel);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  line-height: 1.8;
  overflow-wrap: anywhere;
  transition: border-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.post-nav-card:hover,
.post-nav-card:focus-visible {
  border-color: var(--accent-dark);
  transform: translateY(-2px);
}

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

.post-nav-card strong {
  font-weight: var(--weight-semibold);
}

.post-nav-card time {
  margin-top: auto;
  color: var(--muted);
  font: var(--blog-small-size) / 1.6 var(--font-mono);
}

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

.float-cta {
  position: fixed;
  right: max(1.25rem, env(safe-area-inset-right));
  bottom: max(1.25rem, env(safe-area-inset-bottom));
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  max-width: calc(100vw - 2.5rem);
  min-height: 3rem;
  padding: 0.8rem 1.2rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--text);
  box-shadow: var(--shadow-float);
  font: var(--weight-semibold) var(--blog-small-size) / 1.5 var(--font-body);
  text-decoration: none;
}

.float-cta svg {
  width: 1.25rem;
  height: 1.25rem;
  flex: 0 0 auto;
  color: inherit;
}

@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;
    max-width: none;
  }

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

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

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

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

  .blog-hero,
  .article-hero {
    padding-block: 1.5rem;
    padding-inline: var(--blog-gutter);
  }

  .article-card {
    padding: 1.25rem;
  }

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

  .promo-block {
    padding: 1.5rem;
  }

  .promo-block > .btn {
    width: 100%;
  }

  .float-cta {
    right: max(0.75rem, env(safe-area-inset-right));
    bottom: max(0.75rem, env(safe-area-inset-bottom));
    min-height: 2.75rem;
    padding: 0.65rem 1rem;
  }

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

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

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