:root {
  --blog-column: 56rem;
  --blog-gutter: max(1.5rem, var(--gutter));
  --blog-body-size: 1rem;
  --blog-small-size: 0.875rem;
  --blog-card-title-size: 1.2rem;
  --blog-list-title-size: clamp(2rem, 5vw, 3rem);
  --blog-article-title-size: clamp(1.75rem, 4vw, 2.6rem);
  --blog-h2-size: clamp(1.25rem, 3vw, 1.6rem);
  --blog-h3-size: clamp(1.1rem, 2.5vw, 1.3rem);
  --blog-stat-size: 1.8rem;
  --blog-tracking: -0.015em;
  --blog-leading: 1.9;
  --blog-motion: 180ms;
  --blog-tint: color-mix(in srgb, var(--c-accent) 7%, var(--c-panel));
  --blog-tint-strong: color-mix(in srgb, var(--c-accent) 12%, var(--c-panel));
  --blog-cool: color-mix(in srgb, var(--c-panel-2) 70%, var(--c-panel));
  --blog-warning: color-mix(in srgb, var(--c-warn) 9%, var(--c-panel));
  --blog-success: color-mix(in srgb, var(--c-success) 9%, var(--c-panel));
  --blog-focus: var(--c-accent-dark);
  --blog-shadow: 0 14px 40px color-mix(in srgb, var(--c-accent) 10%, transparent);
  --blog-promo-bg: linear-gradient(120deg, var(--c-accent-dark), var(--c-accent));
  --blog-hero-bg: linear-gradient(180deg, var(--t-accent-04), var(--t-coral-07));
}

.blog-index main,
.article-body,
[data-article-body] {
  min-width: 0;
}

.blog-index h1,
.blog-index h2,
.blog-index h3,
.article-hero h1,
.article-body h1,
.article-body h2,
.article-body h3,
[data-article-body] h1,
[data-article-body] h2,
[data-article-body] h3,
.article-card h3,
#related-posts h2 {
  display: block;
  font-family: var(--f-display);
  letter-spacing: var(--blog-tracking);
  text-wrap: pretty;
  overflow-wrap: anywhere;
  line-height: 1.4;
}

.blog-list-hero {
  padding-block: 4.5rem 3rem;
  background: var(--blog-hero-bg);
  text-align: center;
}

.blog-kicker {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--c-border);
  border-radius: var(--r-pill);
  background: var(--c-panel);
  color: var(--c-muted);
  font-size: var(--blog-small-size);
}

.blog-list-hero h1 {
  margin: 1.25rem 0 1rem;
  font-size: var(--blog-list-title-size);
  font-weight: var(--weight-display);
}

.blog-list-hero h1 .no-break {
  color: var(--c-accent);
}

.blog-list-hero p {
  max-width: 42rem;
  margin-inline: auto;
  color: var(--c-muted);
  font-size: var(--blog-body-size);
  line-height: var(--blog-leading);
}

.blog-topic-notes {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.blog-catalog {
  padding-block: 2.75rem;
}

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

.blog-catalog-head p,
.blog-filter-status {
  color: var(--c-muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-block: 1.5rem 0.75rem;
}

.blog-filters button {
  min-height: 44px;
  max-width: 100%;
  padding: 0.6rem 1rem;
  border: 1px solid var(--c-border);
  border-radius: var(--r-pill);
  background: var(--c-panel);
  color: var(--c-text);
  font-family: var(--f-body);
  font-size: var(--blog-small-size);
  cursor: pointer;
  transition: background var(--blog-motion), border-color var(--blog-motion);
}

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

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

.blog-filter-status {
  min-height: 1.8em;
  margin-block: 0.75rem 1.25rem;
}

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

.article-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1.75rem;
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  background: var(--c-panel);
  box-shadow: var(--blog-shadow);
  color: var(--c-text);
  transition: border-color var(--blog-motion), transform var(--blog-motion);
}

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

.article-meta {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  color: var(--c-muted);
  font-family: var(--f-body);
  font-size: var(--blog-small-size);
  line-height: 1.6;
}

.article-meta .tag {
  max-width: 100%;
  padding: 0.25rem 0.7rem;
  border-radius: var(--r-pill);
  background: var(--c-panel-2);
  color: var(--c-text);
  overflow-wrap: anywhere;
}

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

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

.article-card p {
  margin: 0 0 1.25rem;
  color: var(--c-muted);
  font-size: var(--blog-body-size);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.article-link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--c-accent-dark);
  font-size: var(--blog-small-size);
  font-weight: var(--weight-semibold);
  text-underline-offset: 0.25em;
}

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

.breadcrumbs,
.breadcrumb,
.article-hero,
.reading-wrap,
.article-column,
#related-posts,
#post-nav,
body:not(.blog-index) main > .promo-block {
  box-sizing: border-box;
  width: 100%;
  max-width: calc(var(--blog-column) + var(--blog-gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--blog-gutter);
}

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

.breadcrumbs,
.breadcrumb {
  margin-top: 1.5rem;
  padding-block: 0.5rem 1rem;
  color: var(--c-muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

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

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

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

.article-hero {
  position: relative;
  isolation: isolate;
  padding-block: 2.5rem 2rem;
  background: var(--clear);
}

.article-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0.6rem;
  bottom: 1rem;
  left: var(--blog-gutter);
  right: calc(var(--blog-gutter) + 14%);
  border-radius: var(--r-card);
  background: linear-gradient(135deg, var(--blog-tint-strong), var(--blog-tint));
  box-shadow: inset 0 1px 0 var(--t-white-82);
  pointer-events: none;
}

.article-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: 1.2rem;
  right: var(--blog-gutter);
  width: 18%;
  height: 3.5rem;
  border: 1px solid var(--c-border);
  border-radius: var(--r-pill);
  background: var(--t-white-50);
  pointer-events: none;
}

.article-hero h1 {
  margin-block: 1rem;
  font-size: var(--blog-article-title-size);
  font-weight: var(--weight-display);
}

.article-hero .article-meta,
.article-hero > p,
.article-hero .article-summary,
.article-hero .article-desc {
  position: relative;
  margin-left: 1rem;
}

.article-hero .article-meta .tag {
  background: var(--c-ink);
  color: var(--c-on-ink);
}

.article-hero .article-meta time,
.article-hero .read-time,
.article-hero .reading-time,
.article-hero [data-read-time] {
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--c-border);
  border-radius: var(--r-pill);
  background: var(--c-panel);
  color: var(--c-muted);
}

.article-hero p {
  margin-block: 1rem 0;
  color: var(--c-text);
  font-size: var(--blog-body-size);
  line-height: var(--blog-leading);
}

.prose.article-body,
[data-article-body] {
  padding-block: 1.25rem 1.5rem;
  color: var(--c-text);
  font-family: var(--f-body);
  font-size: var(--blog-body-size);
  line-height: var(--blog-leading);
  overflow-wrap: anywhere;
  counter-reset: blog-chapter;
}

.article-body h2,
[data-article-body] h2 {
  margin-block: 2.25rem 1rem;
  font-size: var(--blog-h2-size);
  scroll-margin-top: var(--anchor-gap);
}

.article-body h2::before,
[data-article-body] h2::before {
  content: "";
  display: inline-block;
  width: 1.4rem;
  height: 0.2rem;
  margin: 0 0.65rem 0.35rem 0;
  border-radius: var(--r-pill);
  background: var(--c-accent);
  vertical-align: middle;
}

.article-body > h2:first-child,
.article-body > section:first-child > h2:first-child,
[data-article-body] > h2:first-child {
  margin-top: 0;
}

.article-body h3,
[data-article-body] h3 {
  margin-block: 1.75rem 0.75rem;
  font-size: var(--blog-h3-size);
}

.article-body p,
[data-article-body] p {
  margin-block: 0 1.25rem;
}

.article-body li,
[data-article-body] li {
  margin-block: 0.45rem;
}

.article-body a,
[data-article-body] a {
  color: var(--c-accent-dark);
  text-underline-offset: 0.25em;
  overflow-wrap: anywhere;
}

.article-body blockquote,
[data-article-body] blockquote {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  border-inline-start: 4px solid var(--c-border);
  border-radius: var(--r-sm);
  background: var(--blog-cool);
  color: var(--c-text);
}

.article-body img,
.article-body svg,
[data-article-body] img,
[data-article-body] svg {
  max-width: 100%;
}

.article-body .table-scroll,
[data-article-body] .table-scroll {
  max-width: 100%;
  overflow-x: auto;
  margin-block: 1.5rem;
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
}

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

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

.article-body thead th,
[data-article-body] thead th {
  background: var(--c-ink);
  color: var(--c-on-ink);
  font-weight: var(--weight-semibold);
}

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

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

.article-body code,
[data-article-body] code {
  font-family: var(--f-mono);
  font-size: var(--blog-small-size);
  overflow-wrap: anywhere;
}

.article-body :not(pre) > code,
[data-article-body] :not(pre) > code {
  padding: 0.15rem 0.35rem;
  border-radius: var(--r-xs);
  background: var(--c-panel-2);
  color: var(--c-text);
}

.article-body pre,
[data-article-body] pre {
  position: relative;
  max-width: 100%;
  overflow-x: auto;
  margin-block: 1.5rem;
  padding: 3rem 1.5rem 1.5rem;
  border: 1px solid var(--c-ink);
  border-radius: var(--r-sm);
  background: var(--c-ink);
  color: var(--c-on-ink);
  line-height: 1.8;
}

.article-body pre::before,
[data-article-body] pre::before {
  content: "VPNQT / 配置示例";
  position: absolute;
  top: 0.75rem;
  left: 1.5rem;
  color: var(--c-on-ink);
  font-family: var(--f-mono);
  font-size: var(--blog-small-size);
}

.article-body pre code,
[data-article-body] pre code {
  white-space: pre;
  overflow-wrap: normal;
  color: inherit;
  background: var(--clear);
}

.callout {
  position: relative;
  margin-block: 1.5rem;
  padding: 1.25rem 1.25rem 1.25rem 3.25rem;
  border-inline-start: 4px solid var(--c-accent-dark);
  border-radius: var(--r-sm);
  background: var(--blog-tint);
  color: var(--c-text);
}

.callout::before {
  content: "i";
  position: absolute;
  top: 1.25rem;
  left: 1rem;
  width: 1.4rem;
  height: 1.4rem;
  border: 1px solid currentColor;
  border-radius: var(--r-circle);
  color: var(--c-accent-dark);
  font-family: var(--f-mono);
  font-weight: var(--weight-bold);
  line-height: 1.4rem;
  text-align: center;
}

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

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

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

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

.callout p:last-child,
.verdict p:last-child,
.article-body blockquote p: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 {
  min-width: 0;
  padding: 1.4rem;
  border: 1px solid var(--c-border);
  border-top: 3px solid var(--c-accent-dark);
  border-radius: var(--r-sm);
  background: var(--blog-tint);
}

.stat-card:nth-child(even) {
  border-top-color: var(--c-text);
  background: var(--blog-cool);
}

.stat-num {
  display: block;
  color: var(--c-text);
  font-family: var(--f-display);
  font-size: var(--blog-stat-size);
  font-weight: var(--weight-bold);
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.stat-label {
  display: block;
  margin-top: 0.5rem;
  color: var(--c-muted);
  font-size: var(--blog-small-size);
  line-height: 1.8;
}

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

.check-list li {
  margin-block: 0.6rem;
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  background: var(--c-panel);
}

.verdict {
  margin-block: 1.5rem;
  padding: 1.25rem 1.5rem;
  border-inline-start: 4px solid var(--c-accent);
  border-radius: var(--r-sm);
  background: var(--blog-tint);
  color: var(--c-text);
}

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

.promo-block {
  position: relative;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-block: 1.5rem 2rem;
  padding: 2rem;
  border: 1px solid var(--c-accent-dark);
  border-radius: var(--r-card);
  background: var(--blog-promo-bg);
  color: var(--c-on-ink);
}

.promo-block .promo-copy {
  flex: 1 1 20rem;
  min-width: 0;
}

.promo-block strong,
.promo-block p {
  color: var(--c-on-ink);
}

.promo-block strong {
  font-family: var(--f-display);
  font-size: var(--blog-h3-size);
}

.promo-block p {
  margin-block: 0.6rem 0;
  font-size: var(--blog-body-size);
  line-height: 1.8;
}

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

.promo-block .btn-primary {
  border: 1px solid var(--c-panel);
  background: var(--c-panel);
  color: var(--c-accent-dark);
  box-shadow: none;
}

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

.promo-block .btn:hover {
  box-shadow: 0 0 0 3px var(--t-white-20);
}

.blog-list-promo {
  max-width: calc(var(--wrap-width) - var(--gutter) * 2);
  width: calc(100% - var(--gutter) * 2);
  margin-bottom: 3rem;
}

.reading-wrap .promo-block,
.article-column .promo-block {
  width: 100%;
  max-width: none;
}

#related-posts {
  padding-block: 1rem 1.5rem;
}

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

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

#related-posts .article-card {
  padding: 1.25rem;
}

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

.post-nav-card {
  display: block;
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  background: var(--c-panel);
  color: var(--c-text);
  text-decoration: none;
  transition: border-color var(--blog-motion), transform var(--blog-motion);
}

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

.post-nav-label {
  display: block;
  margin-bottom: 0.65rem;
  color: var(--c-muted);
  font-size: var(--blog-small-size);
}

.post-nav-card strong {
  font-size: var(--blog-body-size);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

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

.reading-wrap #related-posts,
.reading-wrap #post-nav,
.article-column #related-posts,
.article-column #post-nav {
  max-width: none;
  padding-inline: 0;
}

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

.float-cta {
  position: fixed;
  z-index: 40;
  right: max(1.25rem, env(safe-area-inset-right));
  bottom: calc(1.25rem + env(safe-area-inset-bottom));
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  max-width: calc(100vw - 2.5rem);
  min-height: 48px;
  padding: 0.85rem 1.25rem;
  border: 1px solid var(--t-white-50);
  border-radius: var(--r-pill);
  background: linear-gradient(120deg, var(--c-accent-dark), var(--c-accent));
  box-shadow: var(--blog-shadow);
  color: var(--c-on-ink);
  font-family: var(--f-body);
  font-size: var(--blog-body-size);
  font-weight: var(--weight-semibold);
  text-decoration: none;
}

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

.blog-filters button:focus-visible,
.article-card a:focus-visible,
.post-nav-card:focus-visible,
.promo-block a:focus-visible,
.float-cta:focus-visible,
.table-scroll:focus-visible {
  outline: 3px solid var(--blog-focus);
  outline-offset: 4px;
}

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

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

  .article-body .table-scroll table,
  [data-article-body] .table-scroll table {
    display: table;
    width: 100%;
    min-width: 38rem;
    max-width: none;
  }

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

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

  .blog-list-hero {
    padding-block: 3rem 2rem;
  }

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

  .article-card {
    padding: 1.4rem;
  }

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

  .article-hero::before {
    right: calc(var(--blog-gutter) + 5%);
  }

  .article-hero::after {
    width: 12%;
    height: 2rem;
  }

  .article-hero .article-meta,
  .article-hero > p,
  .article-hero .article-summary,
  .article-hero .article-desc {
    margin-left: 0.5rem;
  }

  .promo-block {
    padding-block: 1.5rem;
    padding-inline: 1.5rem;
  }

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

  .float-cta {
    right: max(1rem, env(safe-area-inset-right));
    bottom: calc(0.75rem + env(safe-area-inset-bottom));
    padding: 0.7rem 1rem;
    font-size: var(--blog-small-size);
  }

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

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

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