:root {
  --blog-reading: 56rem;
  --blog-gutter: max(1.5rem, var(--gutter, 1.5rem));
  --blog-card-pad: clamp(1.25rem, 3vw, 1.75rem);
  --blog-title-size: clamp(1.8rem, 4.4vw, 2.6rem);
  --blog-list-title-size: clamp(2rem, 5vw, 3rem);
  --blog-stamp-size: 5.5rem;
  --blog-stamp-turn: -11deg;
  --blog-stroke: 1px;
  --blog-focus: 3px;
  --blog-lift: -2px;
}

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

.blog-list-wrap {
  padding-top: clamp(2rem, 5vw, 4rem);
  padding-bottom: clamp(2.5rem, 6vw, 4rem);
}

.blog-skip {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  padding: .75rem 1rem;
  transform: translateY(-200%);
  color: var(--panel);
  background: var(--text);
  border-radius: var(--r-sm);
}

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

.blog-list-hero {
  margin-bottom: 2.5rem;
  max-width: 48rem;
}

.blog-eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: .85rem;
}

.blog-list-hero h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: var(--blog-list-title-size);
  font-weight: 400;
  letter-spacing: -.02em;
  line-height: 1.25;
  text-wrap: pretty;
}

.blog-list-hero > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
}

.blog-section-title {
  margin: 0 0 1.25rem;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -.01em;
  line-height: 1.5;
  text-wrap: pretty;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

.blog-filters button {
  min-height: 2.75rem;
  padding: .6rem 1rem;
  border: var(--blog-stroke) solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: .9rem;
  line-height: 1.5;
  cursor: pointer;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), background var(--fast) var(--ease);
}

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

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

.blog-status {
  min-height: 1.8em;
  margin: 1rem 0 1.25rem;
  color: var(--muted);
  font-size: .875rem;
  line-height: 1.8;
}

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

.blog-card-grid > *,
.related-grid > * {
  min-width: 0;
}

.blog-card-grid .article-card,
#related-posts .article-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: var(--blog-card-pad);
  border: var(--blog-stroke) solid var(--border);
  border-radius: var(--r-card);
  background: var(--panel);
  box-shadow: var(--shadow-panel);
  overflow-wrap: anywhere;
  transition: border-color var(--fast) var(--ease), transform var(--fast) var(--ease);
}

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

.article-card__meta,
.article-meta,
.article-hero__meta,
.blog-stamp-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: .5rem .75rem;
  color: var(--muted);
  font-size: .8rem;
  line-height: 1.6;
}

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

.article-card__meta .badge {
  padding: .2rem .6rem;
  border: var(--blog-stroke) solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel-2);
  color: var(--text);
  font-size: .75rem;
}

.article-card h3 {
  display: block;
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  line-height: 1.65;
  letter-spacing: -.01em;
  text-wrap: pretty;
}

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

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

.article-card > p {
  margin: 0;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.85;
}

.article-card > .text-link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--link);
  font-size: .9rem;
  text-underline-offset: .2em;
}

.blog-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 1.5rem;
  border: var(--blog-stroke) solid var(--border);
  border-radius: var(--r-card);
  background: var(--panel);
  color: var(--muted);
  line-height: 1.8;
}

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

.reading-wrap .article-hero,
.reading-wrap .blog-stamp-hero,
.reading-wrap .breadcrumbs,
.reading-wrap .breadcrumb,
.reading-wrap .article-breadcrumbs {
  width: 100%;
  max-width: 100%;
  padding-inline: var(--blog-gutter);
}

.breadcrumbs,
.breadcrumb,
.article-breadcrumbs {
  margin-top: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--muted);
  font-size: .85rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.breadcrumbs ol,
.breadcrumb ol,
.article-breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem .6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li + li::before,
.breadcrumb li + li::before,
.article-breadcrumbs li + li::before {
  content: "›";
  margin-right: .6rem;
  color: var(--muted);
}

.breadcrumbs a,
.breadcrumb a,
.article-breadcrumbs a {
  color: var(--link);
  text-underline-offset: .2em;
}

.article-hero,
.blog-stamp-hero {
  position: relative;
  isolation: isolate;
  padding-block: 2rem;
  margin-top: 0;
  margin-bottom: 1.75rem;
  border: 0;
  border-radius: var(--r-card);
  background: var(--panel);
  box-shadow: var(--shadow-panel);
  overflow-wrap: anywhere;
}

.article-hero::after,
.blog-stamp-hero::after {
  content: "VB";
  position: absolute;
  z-index: -1;
  top: 1.4rem;
  right: 1.5rem;
  display: grid;
  place-items: center;
  box-sizing: border-box;
  width: var(--blog-stamp-size);
  height: var(--blog-stamp-size);
  border: 4px double var(--accent);
  border-radius: var(--r-pill);
  color: var(--accent);
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: .08em;
  transform: rotate(var(--blog-stamp-turn));
  pointer-events: none;
}

.article-hero h1,
.blog-stamp-hero h1 {
  display: block;
  margin: 1.25rem 0 1rem;
  max-width: none;
  color: var(--text);
  font-family: var(--font-display);
  font-size: var(--blog-title-size);
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: -.02em;
  text-wrap: pretty;
}

.article-hero > p,
.blog-stamp-hero > p,
.article-hero__summary {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
}

.article-hero .article-meta,
.article-hero .article-hero__meta,
.blog-stamp-hero .article-meta,
.blog-stamp-hero__meta {
  min-height: var(--blog-stamp-size);
  padding-right: calc(var(--blog-stamp-size) + 1.25rem);
  align-content: center;
}

.article-meta > *,
.article-hero__meta > *,
.blog-stamp-hero__meta > * {
  padding: .3rem .65rem;
  border: var(--blog-stroke) solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
}

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

.prose.article-body,
[data-article-body] {
  counter-reset: blog-section;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.article-body h1,
.article-body h2,
.article-body h3,
[data-article-body] h2,
[data-article-body] h3 {
  display: block;
  font-family: var(--font-display);
  letter-spacing: -.01em;
  text-wrap: pretty;
  scroll-margin-top: var(--anchor-offset);
}

.article-body h2,
[data-article-body] h2 {
  margin: 2.5rem 0 1rem;
  color: var(--text);
  font-size: clamp(1.3rem, 3vw, 1.6rem);
  font-weight: 500;
  line-height: 1.55;
}

.article-body h2::before,
[data-article-body] h2::before {
  counter-increment: blog-section;
  content: counter(blog-section, decimal-leading-zero);
  display: inline-block;
  margin-right: .75rem;
  padding: .15rem .45rem;
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: .8rem;
  vertical-align: .15em;
}

.article-body > h2:first-child,
.article-body > section:first-child > h2:first-child,
[data-article-body] > h2:first-child {
  margin-top: .5rem;
}

.article-body h3,
[data-article-body] h3 {
  margin: 1.75rem 0 .75rem;
  font-size: clamp(1.1rem, 2.5vw, 1.3rem);
  font-weight: 500;
  line-height: 1.6;
}

.article-body p,
[data-article-body] p {
  margin: 0 0 1.15rem;
}

.article-body ul,
.article-body ol,
[data-article-body] ul,
[data-article-body] ol {
  margin: 1rem 0 1.5rem;
  padding-left: 1.5rem;
}

.article-body li + li {
  margin-top: .5rem;
}

.article-body a,
[data-article-body] a {
  color: var(--link);
  text-decoration-thickness: var(--blog-stroke);
  text-underline-offset: .2em;
}

.article-body img,
.article-body svg,
.article-body video {
  max-width: 100%;
  height: auto;
}

.article-body blockquote {
  margin: 1.75rem 0;
  padding: 1.25rem 1.5rem;
  border: 0;
  border-left: 3px solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--panel-2);
  color: var(--text);
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body code {
  padding: .1em .35em;
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: .875em;
  overflow-wrap: anywhere;
}

.article-body pre {
  position: relative;
  box-sizing: border-box;
  max-width: 100%;
  margin: 1.75rem 0;
  padding: 3rem 1.25rem 1.25rem;
  border: var(--blog-stroke) solid var(--text);
  border-radius: var(--r-card);
  background: var(--text);
  color: var(--panel);
  line-height: 1.8;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
}

.article-body pre::before {
  content: "VPNBody / 配置示例";
  position: absolute;
  top: .65rem;
  left: 1.25rem;
  color: var(--panel-2);
  font-family: var(--font-mono);
  font-size: .75rem;
}

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

.article-body .table-scroll {
  max-width: 100%;
  margin: 1.75rem 0;
  border: var(--blog-stroke) solid var(--border);
  border-radius: var(--r-sm);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
}

.article-body table {
  width: 100%;
  margin: 1.75rem 0;
  border-collapse: collapse;
  background: var(--panel);
  font-size: .9375rem;
  line-height: 1.8;
}

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

.article-body caption {
  padding: .75rem 1rem;
  color: var(--muted);
  text-align: left;
  font-size: .85rem;
}

.article-body th,
.article-body td {
  padding: .85rem 1rem;
  border-bottom: var(--blog-stroke) solid var(--border);
  text-align: left;
  vertical-align: top;
}

.article-body thead th {
  background: var(--text);
  color: var(--panel);
  font-weight: 500;
}

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

.article-body tbody tr:hover {
  background: color-mix(in srgb, var(--accent) 10%, var(--panel));
}

.article-body .callout,
.article-body .verdict {
  position: relative;
  margin: 1.75rem 0;
  padding: 1.25rem 1.25rem 1.25rem 3.25rem;
  border: var(--blog-stroke) solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--r-sm);
  background: color-mix(in srgb, var(--accent) 6%, var(--panel));
  color: var(--text);
}

.article-body .callout::before {
  content: "i";
  position: absolute;
  top: 1.3rem;
  left: 1rem;
  width: 1.4rem;
  height: 1.4rem;
  border: var(--blog-stroke) solid currentColor;
  border-radius: var(--r-pill);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.35rem;
  text-align: center;
}

.article-body .callout--warning,
.article-body .callout.warning {
  border-left-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 10%, var(--panel));
}

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

.article-body .callout--success,
.article-body .callout.success {
  border-left-color: var(--success);
  background: color-mix(in srgb, var(--success) 8%, var(--panel));
}

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

.article-body .verdict {
  padding-left: 1.25rem;
}

.article-body .callout p:last-child,
.article-body .verdict p:last-child {
  margin-bottom: 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  gap: 1rem;
  margin: 1.75rem 0;
}

.stat-card {
  min-width: 0;
  padding: 1.25rem;
  border: var(--blog-stroke) solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--panel);
}

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

.stat-num {
  display: block;
  margin-bottom: .35rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 500;
  line-height: 1.4;
}

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

.stat-label {
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.8;
}

.article-body .check-list,
.check-list {
  display: grid;
  gap: .65rem;
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.article-body .check-list li {
  margin: 0;
  padding: .85rem 1rem;
  border: var(--blog-stroke) solid var(--border);
  border-radius: var(--r-sm);
  background: var(--panel);
  list-style: none;
}

.promo-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-block: 2rem;
  padding: 1.75rem;
  border: var(--blog-stroke) solid var(--accent-dark);
  border-radius: var(--r-card);
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--on-accent);
  box-shadow: var(--shadow-panel);
}

.promo-block > div:first-child {
  flex: 1 1 22rem;
  min-width: 0;
}

.promo-block p {
  margin: 0;
  color: var(--on-accent);
  font-size: 1rem;
  line-height: 1.85;
}

.promo-block .promo-block__brand {
  margin-bottom: .5rem;
  color: var(--on-accent);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 500;
}

.blog-promo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

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

.promo-block .btn--line,
.promo-block .btn-secondary {
  border-color: var(--on-accent);
  background: var(--clear);
  color: var(--on-accent);
}

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

.blog-list-promo {
  margin-top: 2.5rem;
}

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

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

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

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  min-width: 0;
  padding: 1.25rem;
  border: var(--blog-stroke) solid var(--border);
  border-radius: var(--r-card);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: border-color var(--fast) var(--ease), transform var(--fast) var(--ease);
}

.post-nav-card--previous {
  grid-column: 1;
}

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

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

.post-nav-card__label {
  color: var(--link);
  font-size: .85rem;
}

.post-nav-card__title {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.8;
}

.post-nav-card time {
  margin-top: auto;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: .8rem;
}

.float-cta {
  position: fixed;
  z-index: 40;
  right: max(1.25rem, env(safe-area-inset-right));
  bottom: max(1.25rem, env(safe-area-inset-bottom));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  max-width: calc(100% - 2.5rem);
  min-height: 3rem;
  padding: .75rem 1.25rem;
  border: var(--blog-stroke) solid var(--text);
  border-radius: var(--r-pill);
  background: var(--text);
  color: var(--panel);
  box-shadow: var(--shadow-panel);
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.5;
  text-decoration: none;
}

.float-cta svg {
  flex: 0 0 auto;
  width: 1.15rem;
  height: 1.15rem;
  color: inherit;
}

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

.blog-index :where(a, button):focus-visible,
.blog-article :where(a, button, summary, [tabindex]):focus-visible,
.article-body :where(a, [tabindex]):focus-visible,
#related-posts a:focus-visible,
#post-nav a:focus-visible,
.float-cta:focus-visible {
  outline: var(--blog-focus) solid var(--link);
  outline-offset: 4px;
}

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

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

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

  .article-body .table-scroll table {
    display: table;
    width: 100%;
    max-width: none;
  }
}

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

  .blog-card-grid {
    grid-template-columns: 1fr;
  }

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

  .article-hero::after,
  .blog-stamp-hero::after {
    top: 1.2rem;
    right: 1.3rem;
  }

  .article-hero .article-meta,
  .article-hero .article-hero__meta,
  .blog-stamp-hero .article-meta,
  .blog-stamp-hero__meta {
    column-gap: .4rem;
    row-gap: .4rem;
  }

  .article-hero h1,
  .blog-stamp-hero h1 {
    font-size: clamp(1.75rem, 6.5vw, 2.25rem);
  }

  .promo-block {
    padding: 1.5rem;
  }

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

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

  .post-nav-card--previous,
  .post-nav-card--next {
    grid-column: 1;
  }

  .float-cta {
    right: max(1rem, env(safe-area-inset-right));
    bottom: max(.75rem, env(safe-area-inset-bottom));
    max-width: calc(100% - 2rem);
    min-height: 2.75rem;
    padding: .65rem 1rem;
  }

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

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

  .blog-card-grid .article-card:hover,
  #related-posts .article-card:hover,
  .blog-card-grid .article-card:focus-within,
  #related-posts .article-card:focus-within,
  .post-nav-card:hover,
  .post-nav-card:focus-visible {
    transform: none;
  }
}