:root {
  --blog-reading-width: 820px;
  --blog-column-padding: max(1.5rem, var(--gutter));
  --blog-body-size: 1rem;
  --blog-list-title-size: clamp(2rem, 4.8vw, 3rem);
  --blog-article-title-size: clamp(1.8rem, 3.8vw, 2.6rem);
  --blog-h2-size: clamp(1.3rem, 2.6vw, 1.6rem);
  --blog-h3-size: clamp(1.1rem, 2vw, 1.3rem);
  --blog-small-size: 0.875rem;
  --blog-kicker-size: 0.78rem;
  --blog-number-size: clamp(1.7rem, 4vw, 2.4rem);
  --blog-weight-title: 800;
  --blog-weight-label: 650;
  --blog-line-height: 1.9;
  --blog-title-tracking: -0.015em;
  --blog-radius: var(--r-sm);
  --blog-tint: color-mix(in srgb, var(--accent) 10%, var(--bg-panel));
  --blog-warning-tint: color-mix(in srgb, var(--warn) 12%, var(--bg-panel));
  --blog-success-tint: color-mix(in srgb, var(--success) 10%, var(--bg-panel));
  --blog-ink-soft: color-mix(in srgb, var(--text) 8%, var(--bg-panel));
  --blog-hero-tint: color-mix(in srgb, var(--accent) 15%, var(--bg));
  --blog-shadow: 0 18px 40px var(--shadow-accent);
  --blog-card-motion: 160ms;
}

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

.blog-page *,
.blog-page *::before,
.blog-page *::after {
  box-sizing: border-box;
}

.blog-page main,
.blog-page article,
.blog-page section,
.blog-page aside,
.blog-page nav,
.blog-page .article-card,
.blog-page .stat-card {
  min-width: 0;
}

.blog-page h1,
.blog-page h2,
.blog-page h3,
.article-hero h1,
.prose h2,
.prose h3,
.article-body h2,
.article-body h3,
.post-content h2,
.post-content h3,
[data-article-body] h2,
[data-article-body] h3 {
  display: block;
  font-family: var(--font-display);
  letter-spacing: var(--blog-title-tracking);
  text-wrap: pretty;
  overflow-wrap: break-word;
  word-break: normal;
}

.blog-page a:focus-visible,
.blog-page button:focus-visible,
#related-posts a:focus-visible,
#post-nav a:focus-visible,
.prose a:focus-visible {
  outline: 3px solid var(--accent-dark);
  outline-offset: 4px;
}

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

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

.blog-index-main {
  padding-bottom: 3rem;
}

.breadcrumbs {
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  padding-top: 0.25rem;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

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

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

.blog-hero::before,
.article-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 1.1rem;
  right: var(--blog-column-padding);
  bottom: 1rem;
  left: 12%;
  border-radius: var(--r-md);
  background: var(--blog-hero-tint);
  pointer-events: none;
}

.blog-hero {
  padding: 2.5rem var(--blog-column-padding) 3rem;
  margin-bottom: 2rem;
}

.blog-eyebrow {
  margin: 0 0 1.2rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  letter-spacing: 0.04em;
}

.blog-hero h1 {
  max-width: 20ch;
  margin: 0;
  font-size: var(--blog-list-title-size);
  font-weight: var(--weight-display);
  line-height: 1.25;
}

.blog-hero__summary {
  max-width: 42rem;
  margin: 1.5rem 0 0 1rem;
  color: var(--text-muted);
  line-height: var(--blog-line-height);
}

.blog-library__heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
}

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

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

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.25rem 0 1.75rem;
}

.blog-filters button {
  min-height: 2.75rem;
  padding: 0.6rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  color: var(--text);
  background: var(--bg-panel);
  font-family: var(--font-body);
  font-size: var(--blog-small-size);
  line-height: 1.5;
  cursor: pointer;
}

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

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

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

.article-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--blog-radius);
  color: var(--text);
  background: var(--bg-panel);
  transition: border-color var(--blog-card-motion) ease, transform var(--blog-card-motion) ease, box-shadow var(--blog-card-motion) ease;
}

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

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

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

.article-card .tag {
  display: inline-block;
  max-width: 100%;
  padding: 0.2rem 0.6rem;
  border-radius: var(--r-xs);
  color: var(--text);
  background: var(--bg-panel-2);
  white-space: normal;
}

.article-card h3 {
  margin: 0;
  font-size: var(--blog-h3-size);
  font-weight: var(--blog-weight-title);
  line-height: 1.55;
}

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

.article-card h3 a:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.article-card > p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: 1.85;
}

.article-card__link {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 0.25rem;
  color: var(--text);
  font-weight: var(--blog-weight-label);
  text-underline-offset: 0.25em;
}

.blog-empty {
  grid-column: 1 / -1;
  padding: 2rem;
  border: 1px dashed var(--border);
  border-radius: var(--blog-radius);
  background: var(--bg-panel-2);
  line-height: var(--blog-line-height);
}

.blog-empty p {
  margin-top: 0;
}

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

/* A single box model keeps the breadcrumb, hero and reading column aligned. */
.reading-wrap,
.article-hero,
.article-breadcrumbs,
.blog-article > .breadcrumbs,
.article-page > .breadcrumbs,
.blog-page > .breadcrumbs,
.blog-page main > .breadcrumbs:not(.blog-index-main > .breadcrumbs) {
  width: 100%;
  max-width: calc(var(--blog-reading-width) + var(--blog-column-padding) + var(--blog-column-padding));
  margin-inline: auto;
  padding-inline: var(--blog-column-padding);
}

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

.reading-wrap .reading-wrap,
.reading-wrap .article-hero,
.reading-wrap .article-breadcrumbs,
.reading-wrap .breadcrumbs {
  width: 100%;
  max-width: none;
  padding-inline: 0;
}

.reading-wrap .article-hero {
  padding-inline: var(--blog-column-padding);
}

.article-hero {
  margin-block: 0 2rem;
  padding-block: 2rem 2.25rem;
}

.article-hero::before {
  top: 0.75rem;
  bottom: 0.75rem;
  left: 18%;
}

.article-hero h1 {
  position: relative;
  margin: 1.1rem 0 1.25rem;
  font-size: var(--blog-article-title-size);
  font-weight: var(--blog-weight-title);
  line-height: 1.4;
}

.article-hero .article-meta,
.article-hero .article-hero__meta,
.article-hero .post-meta,
.article-hero .article-card__meta {
  margin-left: 0.5rem;
}

.article-hero .tag {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--text);
  border-radius: var(--r-pill);
  color: var(--bg-panel);
  background: var(--text);
  white-space: normal;
}

.article-hero time,
.article-hero .read-time,
.article-hero .reading-time,
.article-hero [data-reading-time] {
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  color: var(--text-muted);
  background: var(--bg-panel);
  font-size: var(--blog-small-size);
}

.article-hero__summary,
.article-summary,
.article-hero > p:last-child {
  margin: 0 0 0 0.5rem;
  color: var(--text-muted);
  font-size: var(--blog-body-size);
  line-height: var(--blog-line-height);
}

:is(.prose, .article-body, .post-content, [data-article-body]) {
  margin-inline: auto;
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--blog-body-size);
  line-height: var(--blog-line-height);
  overflow-wrap: break-word;
  counter-reset: blog-section;
}

:is(.prose, .article-body, .post-content, [data-article-body]) > :first-child {
  margin-top: 0;
}

:is(.prose, .article-body, .post-content, [data-article-body]) p {
  margin-block: 1rem;
}

:is(.prose, .article-body, .post-content, [data-article-body]) h2 {
  counter-increment: blog-section;
  margin: 2.75rem 0 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border);
  font-size: var(--blog-h2-size);
  font-weight: var(--blog-weight-title);
  line-height: 1.55;
  scroll-margin-top: var(--anchor-offset);
}

:is(.prose, .article-body, .post-content, [data-article-body]) h2::before {
  content: counter(blog-section, decimal-leading-zero) " / ";
  display: inline;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  font-weight: var(--blog-weight-label);
  letter-spacing: 0;
}

:is(.prose, .article-body, .post-content, [data-article-body]) h3 {
  margin: 1.8rem 0 0.65rem;
  font-size: var(--blog-h3-size);
  line-height: 1.6;
}

:is(.prose, .article-body, .post-content, [data-article-body]) :is(ul, ol) {
  padding-left: 1.5rem;
  margin-block: 1rem 1.5rem;
}

:is(.prose, .article-body, .post-content, [data-article-body]) li + li {
  margin-top: 0.5rem;
}

:is(.prose, .article-body, .post-content, [data-article-body]) a {
  color: var(--text);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

:is(.prose, .article-body, .post-content, [data-article-body]) a:hover {
  text-decoration-thickness: 2px;
}

:is(.prose, .article-body, .post-content, [data-article-body]) blockquote {
  margin: 1.75rem 0;
  padding: 1.2rem 1.5rem;
  border-left: 3px solid var(--text-muted);
  border-radius: var(--r-xs);
  color: var(--text-muted);
  background: var(--bg-panel-2);
}

:is(.prose, .article-body, .post-content, [data-article-body]) blockquote > :first-child {
  margin-top: 0;
}

:is(.prose, .article-body, .post-content, [data-article-body]) blockquote > :last-child {
  margin-bottom: 0;
}

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

:is(.prose, .article-body, .post-content, [data-article-body]) pre {
  position: relative;
  max-width: 100%;
  margin: 1.75rem 0;
  padding: 3rem 1.4rem 1.4rem;
  overflow-x: auto;
  border: 1px solid var(--on-dark-line);
  border-radius: var(--blog-radius);
  color: var(--on-dark);
  background: var(--ink-card);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  line-height: 1.85;
  tab-size: 2;
}

:is(.prose, .article-body, .post-content, [data-article-body]) pre::before {
  content: "VPNFine / 命令参考";
  position: absolute;
  top: 0.7rem;
  left: 1.4rem;
  color: var(--on-dark-muted);
  font-family: var(--font-mono);
  font-size: var(--blog-kicker-size);
}

:is(.prose, .article-body, .post-content, [data-article-body]) pre code {
  padding: 0;
  border: 0;
  border-radius: var(--r-xs);
  color: inherit;
  background: var(--clear);
  font: inherit;
  white-space: pre;
  overflow-wrap: normal;
}

:is(.prose, .article-body, .post-content, [data-article-body]) .table-scroll {
  max-width: 100%;
  margin-block: 1.75rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--blog-radius);
  overscroll-behavior-inline: contain;
}

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

:is(.prose, .article-body, .post-content, [data-article-body]) caption {
  padding: 0.8rem 1rem;
  color: var(--text-muted);
  background: var(--bg-panel);
  text-align: left;
}

:is(.prose, .article-body, .post-content, [data-article-body]) :is(th, td) {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

:is(.prose, .article-body, .post-content, [data-article-body]) thead th {
  color: var(--on-dark);
  background: var(--text);
  font-weight: var(--blog-weight-label);
}

:is(.prose, .article-body, .post-content, [data-article-body]) tbody tr {
  background: var(--bg-panel);
}

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

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

.callout,
.verdict {
  position: relative;
  margin-block: 1.75rem;
  padding: 1.25rem 1.4rem;
  border-left: 4px solid var(--accent-dark);
  border-radius: var(--blog-radius);
  color: var(--text);
  background: var(--blog-tint);
  line-height: var(--blog-line-height);
}

.callout {
  padding-left: 3.75rem;
}

.callout::before {
  content: "i";
  position: absolute;
  top: 1.25rem;
  left: 1.1rem;
  display: inline-block;
  width: 1.65rem;
  height: 1.65rem;
  border: 1px solid currentColor;
  border-radius: var(--r-round);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: var(--blog-small-size);
  font-weight: var(--blog-weight-title);
  line-height: 1.5;
  text-align: center;
}

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

.callout--warning::before,
.callout.warning::before {
  content: "!";
}

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

.callout--success::before,
.callout.success::before {
  content: "✓";
}

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

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

.verdict > strong:first-child,
.verdict > p:first-child > strong:first-child {
  font-weight: var(--blog-weight-title);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  gap: 1rem;
  margin-block: 1.75rem;
}

.stat-card {
  padding: 1.3rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--text-muted);
  border-radius: var(--blog-radius);
  color: var(--text);
  background: var(--bg-panel-2);
}

.stat-card:nth-child(even) {
  border-top-color: var(--accent-dark);
  background: var(--blog-tint);
}

.stat-num {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: var(--blog-number-size);
  font-weight: var(--blog-weight-title);
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.stat-label {
  display: block;
  color: var(--text-muted);
  font-size: var(--blog-small-size);
  line-height: 1.7;
}

:is(.prose, .article-body, .post-content, [data-article-body]) .check-list,
.check-list {
  display: grid;
  gap: 0.6rem;
  margin-block: 1.5rem;
  padding: 0;
  list-style: none;
}

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

.check-list li::before,
.check-list li::after {
  content: none;
}

.promo-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  position: relative;
  isolation: isolate;
  margin-block: 2.5rem;
  padding: 2rem;
  overflow: hidden;
  border: 1px solid var(--on-dark-line);
  border-radius: var(--r-md);
  color: var(--on-dark);
  background: linear-gradient(120deg, var(--accent-dark), var(--band-c));
}

.promo-block::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0.6rem;
  border: 1px solid var(--on-dark-line);
  border-radius: var(--blog-radius);
  pointer-events: none;
}

.promo-block__copy {
  flex: 1 1 18rem;
  min-width: 0;
}

.promo-block__brand {
  font-family: var(--font-display);
  font-size: var(--blog-h2-size);
  font-weight: var(--blog-weight-title);
}

.promo-block__copy p {
  margin: 0.65rem 0 0;
  color: var(--on-dark);
  font-size: var(--blog-body-size);
  line-height: 1.85;
}

.promo-block .cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0;
}

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

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

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

.promo-block .btn--ghost:hover {
  background: var(--on-dark-edge);
}

.promo-block a:focus-visible {
  outline-color: var(--on-dark);
}

#related-posts,
#post-nav {
  width: 100%;
  max-width: calc(var(--blog-reading-width) + var(--blog-column-padding) + var(--blog-column-padding));
  margin-inline: auto;
  padding-inline: var(--blog-column-padding);
}

.reading-wrap #related-posts,
.reading-wrap #post-nav {
  max-width: 100%;
  padding-inline: 0;
}

#related-posts {
  margin-block: 0;
  padding-top: 1.5rem;
  padding-bottom: 1rem;
}

#related-posts > h2 {
  margin: 0 0 1.25rem;
  font-size: var(--blog-h2-size);
  line-height: 1.5;
}

#related-posts > h2::before {
  content: none;
}

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

.related-grid .article-card {
  padding: 1.2rem;
}

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

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

.post-nav__card {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  min-width: 0;
  padding: 1.4rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--blog-radius);
  color: var(--text);
  background: var(--bg-panel);
  text-decoration: none;
  transition: border-color var(--blog-card-motion) ease, transform var(--blog-card-motion) ease;
}

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

.post-nav__card:hover,
.post-nav__card:focus-visible {
  border-top-color: var(--accent-dark);
  transform: translateY(-3px);
}

.post-nav__label {
  color: var(--text-muted);
  font-size: var(--blog-small-size);
}

.post-nav__card > strong {
  font-size: var(--blog-body-size);
  line-height: 1.8;
  overflow-wrap: break-word;
}

.post-nav__card .article-card__meta {
  margin-top: auto;
}

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

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

  :is(.prose, .article-body, .post-content, [data-article-body]) table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
  }

  :is(.prose, .article-body, .post-content, [data-article-body]) .table-scroll table {
    display: table;
    width: 100%;
    min-width: 36rem;
    max-width: none;
    overflow: visible;
  }
}

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

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

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

  .blog-hero {
    padding-block: 1.75rem 2rem;
  }

  .blog-hero::before,
  .article-hero::before {
    left: 22%;
  }

  .blog-hero__summary,
  .article-hero__summary,
  .article-summary,
  .article-hero > p:last-child {
    margin-left: 0;
  }

  .article-hero {
    padding-block: 1.5rem 1.75rem;
    margin-bottom: 1.5rem;
  }

  .article-hero .article-meta,
  .article-hero .article-hero__meta,
  .article-hero .post-meta,
  .article-hero .article-card__meta {
    margin-left: 0;
  }

  .article-card {
    padding: 1.25rem;
  }

  .promo-block {
    padding: 1.5rem;
    margin-block: 2rem;
  }

  .promo-block .cta-row {
    width: 100%;
  }

  .promo-block .cta-row .btn {
    flex: 1 1 auto;
  }
}

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

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