:root {
  --blog-reading: 56rem;
  --blog-gutter: max(1.5rem, var(--gutter));
  --blog-body-size: 1rem;
  --blog-body-leading: 1.9;
  --blog-title-size: 2.6rem;
  --blog-list-title-size: 3rem;
  --blog-h2-size: 1.6rem;
  --blog-h3-size: 1.3rem;
  --blog-letter-spacing: -0.015em;
  --blog-space-small: 1rem;
  --blog-space-medium: 1.5rem;
  --blog-space-large: 2.5rem;
  --blog-callout-warn: color-mix(in srgb, var(--warn) 12%, var(--panel));
  --blog-callout-success: color-mix(in srgb, var(--success) 10%, var(--panel));
  --blog-blue-paper: color-mix(in srgb, var(--accent) 8%, var(--panel));
  --blog-focus-shadow: 0 0 0 3px var(--a28);
}

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

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

.blog-index h1,
.blog-index h2,
.blog-index h3,
.article-hero h1,
.prose h1,
.prose h2,
.prose h3,
#related-posts h2,
#related-posts h3 {
  display: block;
  font-family: var(--font-display);
  letter-spacing: var(--blog-letter-spacing);
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

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

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

.blog-index a:focus-visible,
.blog-index button:focus-visible,
.reading-wrap a:focus-visible,
.float-cta:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

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

.breadcrumbs {
  margin-top: 1.5rem;
  padding-top: 0.25rem;
  padding-bottom: 1.25rem;
  font-size: var(--fs-small);
  color: var(--muted);
}

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

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

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--muted);
}

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

.blog-list-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.45fr);
  align-items: end;
  gap: var(--blog-space-large);
  padding-block: 2.5rem 3rem;
}

.blog-hero-copy,
.article-hero {
  position: relative;
  isolation: isolate;
}

.blog-hero-copy::before,
.article-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  pointer-events: none;
  background: var(--blog-blue-paper);
  border: 1px solid var(--a22);
  border-radius: var(--r-m);
  box-shadow: var(--shadow-paper), inset 0 1px 0 var(--hi);
}

.blog-hero-copy::before {
  top: 0.5rem;
  right: 8%;
  bottom: 1rem;
  left: 1.5rem;
}

.blog-hero-copy {
  padding: 1.5rem;
}

.blog-kicker {
  margin: 0 0 1rem;
  color: var(--accent-dark);
  font-size: var(--fs-small);
  font-weight: var(--weight-semibold);
}

.blog-list-hero h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, var(--blog-list-title-size));
  line-height: 1.2;
  font-weight: var(--weight-display);
}

.blog-hero-summary {
  max-width: 36rem;
  margin: 1.5rem 0 0 1rem;
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
  color: var(--muted);
}

.blog-hero-note {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  background: var(--panel);
  box-shadow: var(--shadow-small);
  font-size: var(--fs-small);
  line-height: 1.8;
}

.blog-hero-note p {
  margin-block: 1rem;
}

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

.blog-list-toolbar {
  margin-bottom: 1.5rem;
}

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

.blog-filters button {
  min-height: 2.75rem;
  padding: 0.6rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-s);
  background: var(--panel);
  color: var(--text);
  font: var(--weight-medium) var(--fs-small) / 1.5 var(--font-body);
  cursor: pointer;
  transition: border-color var(--fast) var(--ease), background var(--fast) var(--ease);
}

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

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

#blog-list-status {
  margin: 1rem 0 0;
  font-size: var(--fs-small);
}

.blog-card-grid,
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.article-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  background: var(--panel);
  box-shadow: inset 0 1px 0 var(--hi), var(--shadow-small);
  transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}

.article-card:hover,
.article-card:focus-within {
  border-color: var(--accent);
  box-shadow: inset 0 3px 0 var(--accent), var(--shadow-paper);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem 0.75rem;
  color: var(--muted);
  font-size: var(--fs-small);
}

.article-meta time {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
}

.article-card h2,
.article-card h3,
#related-posts .article-card h3 {
  margin: 1.2rem 0 0.75rem;
  font-size: var(--blog-h3-size);
  line-height: 1.6;
  font-weight: var(--weight-bold);
}

.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);
}

.article-card .article-summary {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: var(--blog-body-size);
  line-height: 1.85;
}

.article-card > .text-link {
  align-self: flex-start;
  margin-top: auto;
}

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

.article-hero {
  padding-block: 2rem;
  margin-bottom: 1.5rem;
}

.article-hero::before {
  top: 0.75rem;
  left: calc(var(--blog-gutter) + 1rem);
  right: var(--blog-gutter);
  bottom: 1rem;
}

.article-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0.25rem;
  right: calc(var(--blog-gutter) + 1.5rem);
  width: 4rem;
  height: 0.4rem;
  border-radius: var(--r-xs);
  background: var(--accent);
}

.article-hero h1 {
  margin: 1.25rem 0;
  max-width: 100%;
  color: var(--text);
  font-size: clamp(1.8rem, 4vw, var(--blog-title-size));
  font-weight: var(--weight-display);
  line-height: 1.45;
}

.article-hero .article-meta,
.article-hero .article-summary,
.article-hero .article-lead {
  margin-left: 1rem;
  margin-right: 1rem;
}

.article-hero .article-meta {
  justify-content: flex-start;
}

.article-hero .article-meta > * {
  display: inline-block;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-round);
  background: var(--panel);
  color: var(--text);
  font-size: var(--fs-small);
  line-height: 1.6;
}

.article-hero .article-meta .badge,
.article-hero .article-meta .article-tag {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.article-hero .article-summary,
.article-hero .article-lead {
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
  color: var(--muted);
}

.prose {
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
  overflow-wrap: anywhere;
  counter-reset: blog-section;
}

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

.prose > :first-child,
.prose > section:first-child > h2:first-child {
  margin-top: 0;
}

.prose p,
.prose ul,
.prose ol {
  margin-block: 1rem 1.25rem;
}

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

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

.prose h2 {
  counter-increment: blog-section;
  margin: 2.5rem 0 1rem;
  font-size: var(--blog-h2-size);
  font-weight: var(--weight-bold);
  line-height: 1.6;
  color: var(--text);
}

.prose h2::before {
  content: counter(blog-section, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.7rem;
  padding: 0.1rem 0.45rem;
  border: 1px solid var(--a22);
  border-radius: var(--r-xs);
  background: var(--blog-blue-paper);
  color: var(--accent-dark);
  font: var(--weight-semibold) var(--fs-small) / 1.7 var(--font-mono);
  vertical-align: middle;
}

.prose h3 {
  margin: 1.75rem 0 0.75rem;
  font-size: var(--blog-h3-size);
  line-height: 1.6;
  font-weight: var(--weight-bold);
}

.prose a:not(.btn) {
  color: var(--accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

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

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

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

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-block: 1.5rem;
  font-size: var(--fs-small);
  background: var(--panel);
}

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

.prose caption {
  padding: 0.75rem 1rem;
  text-align: left;
  color: var(--muted);
  background: var(--panel);
}

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

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

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

.prose tbody tr:hover {
  background: var(--blog-blue-paper);
}

.prose pre {
  position: relative;
  max-width: 100%;
  overflow-x: auto;
  margin-block: 1.5rem;
  padding: 3rem 1.5rem 1.5rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-m);
  background: var(--text);
  color: var(--on-dark);
  font: var(--weight-normal) var(--fs-code) / 1.85 var(--font-mono);
  white-space: pre;
  overflow-wrap: normal;
}

.prose pre::before {
  content: "VPNBen / 终端";
  position: absolute;
  top: 0.75rem;
  left: 1.5rem;
  color: var(--on-dark);
  font: var(--weight-medium) var(--fs-xs) / 1.5 var(--font-mono);
}

.prose code {
  font-family: var(--font-mono);
  font-size: var(--fs-code);
}

.prose :not(pre) > code {
  padding: 0.15rem 0.35rem;
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--text);
}

.prose pre code {
  padding: 0;
  background: var(--clear);
  color: inherit;
}

.prose blockquote,
.prose .callout {
  position: relative;
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem 1.25rem 3.5rem;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--r-s);
  background: var(--blog-blue-paper);
  color: var(--text);
}

.prose blockquote::before,
.prose .callout::before {
  content: "i";
  position: absolute;
  top: 1.3rem;
  left: 1rem;
  width: 1.4rem;
  height: 1.4rem;
  border: 1px solid currentColor;
  border-radius: var(--r-round);
  color: var(--accent-dark);
  font: var(--weight-bold) var(--fs-small) / 1.3rem var(--font-mono);
  text-align: center;
}

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

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

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

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

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

.prose .callout > :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: 1px solid var(--a22);
  border-top: 3px solid var(--accent);
  border-radius: var(--r-s);
  background: var(--blog-blue-paper);
  box-shadow: inset 0 1px 0 var(--hi);
}

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

.stat-num {
  display: block;
  color: var(--accent-dark);
  font: var(--weight-bold) var(--blog-h2-size) / 1.5 var(--font-mono);
  overflow-wrap: anywhere;
}

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

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

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

.prose .check-list li {
  list-style: none;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--r-s);
  background: var(--panel);
  box-shadow: inset 0 1px 0 var(--hi);
}

.verdict {
  margin-block: 1.5rem;
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--accent);
  border-radius: var(--r-s);
  background: var(--blog-blue-paper);
  color: var(--text);
}

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

.blog-list-promo {
  margin-block: 0 3rem;
}

.prose .promo-block,
.blog-list-promo .promo-block,
.reading-wrap > .promo-block {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 2rem;
  border: 1px solid var(--accent);
  border-radius: var(--r-m);
  background: linear-gradient(120deg, var(--accent-dark), var(--accent));
  color: var(--on-accent);
  box-shadow: var(--shadow-paper), inset 0 1px 0 var(--hi-dim);
}

.prose .promo-block {
  margin-block: 2rem;
}

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

.promo-block .promo-copy strong {
  color: var(--on-accent);
  font: var(--weight-brand) var(--fs-brand) / 1.5 var(--font-display);
}

.promo-block .promo-copy p {
  margin: 0.5rem 0 0;
  color: var(--on-accent);
  font-size: var(--blog-body-size);
  line-height: 1.8;
}

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

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

.promo-block .btn-secondary {
  border: 1px solid var(--on-accent);
  background: var(--clear);
  color: var(--on-accent);
}

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

.promo-block .btn-secondary:hover {
  background: var(--a22);
  color: var(--on-accent);
}

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

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

#related-posts > h2 {
  margin: 0 0 1.25rem;
  font-size: var(--blog-h2-size);
  line-height: 1.6;
}

#related-posts > h2::before {
  content: "";
  display: inline-block;
  width: 1.5rem;
  height: 0.2rem;
  margin-right: 0.65rem;
  border-radius: var(--r-xs);
  background: var(--accent);
  vertical-align: middle;
}

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

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  line-height: 1.8;
  transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}

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

.post-nav-card:hover,
.post-nav-card:focus-visible {
  border-color: var(--accent);
  box-shadow: inset 0 3px 0 var(--accent), var(--shadow-small);
}

.post-nav-card strong {
  overflow-wrap: anywhere;
  font-size: var(--blog-body-size);
}

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

.post-nav-card time {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
}

.float-cta {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: calc(1rem + env(safe-area-inset-bottom));
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  max-width: calc(100vw - 2rem);
  min-height: 3rem;
  padding: 0.8rem 1.25rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-round);
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: var(--shadow-paper);
  font: var(--weight-semibold) var(--fs-button) / 1.5 var(--font-body);
  text-decoration: none;
}

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

.float-cta:hover {
  background: var(--accent-dark);
  color: var(--on-accent);
}

@media (max-width: 1000px) {
  .blog-card-grid,
  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@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%;
    max-width: none;
    overflow: visible;
  }

  .blog-list-hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 1rem;
  }

  .blog-hero-note {
    max-width: 36rem;
  }
}

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

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

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

  .blog-list-hero {
    padding-block: 1rem 2rem;
  }

  .blog-list-hero h1 {
    font-size: min(var(--blog-list-title-size), 2.35rem);
  }

  .article-hero {
    padding-block: 1.5rem;
    margin-bottom: 1rem;
  }

  .article-hero h1 {
    font-size: clamp(1.7rem, 7vw, 2.2rem);
  }

  .article-hero .article-meta,
  .article-hero .article-summary,
  .article-hero .article-lead,
  .blog-hero-summary {
    margin-left: 0;
    margin-right: 0;
  }

  .article-hero::before {
    left: var(--blog-gutter);
    right: var(--blog-gutter);
    top: 0.5rem;
    bottom: 0.5rem;
  }

  .article-card {
    padding: 1.25rem;
  }

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

  .blog-promo-actions {
    width: 100%;
  }

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

  .float-cta {
    padding: 0.65rem 1rem;
    min-height: 2.75rem;
    font-size: var(--fs-small);
  }

  body:has(.float-cta) {
    padding-bottom: calc(5rem + env(safe-area-inset-bottom));
    scroll-padding-bottom: 6rem;
  }
}

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