:root {
  --blog-reading: 56rem;
  --blog-list-title: clamp(2rem, 4vw, 3rem);
  --blog-article-title: clamp(2rem, 3.5vw, 2.6rem);
  --blog-heading-size: 1.6rem;
  --blog-subheading-size: 1.3rem;
  --blog-body-size: 1rem;
  --blog-meta-size: 0.8125rem;
  --blog-stat-size: 1.9rem;
  --blog-body-leading: 1.9;
  --blog-title-leading: 1.32;
  --blog-heading-tracking: -0.015em;
  --blog-rule-width: 4px;
  --blog-callout-width: 3px;
  --blog-column-gap: 1.25rem;
  --blog-card-padding: 1.5rem;
  --blog-hover-shift: -3px;
  --blog-focus-width: 3px;
  --blog-focus-offset: 4px;
  --blog-promo-bg: linear-gradient(115deg, var(--accent-dark), var(--accent));
  --blog-promo-ink: var(--on-accent);
  --blog-code-bg: var(--ink);
  --blog-code-ink: var(--ink-text);
  --blog-warning-bg: color-mix(in srgb, var(--warn) 10%, var(--panel));
  --blog-success-bg: color-mix(in srgb, var(--success) 9%, var(--panel));
  --blog-rule-gradient: linear-gradient(90deg, var(--accent) 0%, var(--accent) 72%, var(--aura-amber) 72%, var(--aura-lav) 100%);
}

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

.blog-index main,
.article-page main {
  min-width: 0;
}

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

.blog-index a:focus-visible,
.blog-index button:focus-visible,
.article-page a:focus-visible,
.article-page button:focus-visible,
.float-cta:focus-visible {
  outline: var(--blog-focus-width) solid var(--accent);
  outline-offset: var(--blog-focus-offset);
}

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

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

.blog-list-hero {
  padding-block: clamp(2.5rem, 6vw, 5rem) 2rem;
}

.blog-eyebrow {
  margin: 0 0 1.25rem;
  padding-top: 1rem;
  border-top: var(--blog-rule-width) solid var(--accent);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--size-small);
}

.blog-list-hero h1 {
  margin: 0;
  max-width: 22ch;
  font-size: var(--blog-list-title);
  font-weight: var(--weight-display);
  line-height: var(--blog-title-leading);
}

.blog-list-lede {
  max-width: 44rem;
  margin: 1.25rem 0;
  color: var(--muted);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
}

.blog-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--blog-meta-size);
}

.blog-facts span {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--r-tag);
  background: var(--panel);
}

.blog-catalog {
  padding-block: 0.5rem 2rem;
}

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  padding-block: 1rem;
  border-block: 1px solid var(--border);
}

.blog-filter button {
  min-height: 2.75rem;
  padding: 0.6rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-s);
  background: var(--panel);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: var(--size-small);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease), border-color var(--duration-fast) var(--ease), color var(--duration-fast) var(--ease);
}

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

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

.blog-result-status {
  min-height: 1.5rem;
  margin-block: 1rem 1.25rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--blog-meta-size);
}

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

.blog-post-grid .article-card,
#related-posts .article-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: var(--blog-card-padding);
  border: 1px solid var(--border);
  border-top: var(--blog-rule-width) solid var(--border);
  border-radius: var(--r-m);
  background: var(--panel);
  box-shadow: inset 0 1px 0 var(--hl-white);
  transition: transform var(--duration-fast) var(--ease), border-color var(--duration-fast) var(--ease), box-shadow var(--duration-fast) var(--ease);
}

.blog-post-grid .article-card:hover,
.blog-post-grid .article-card:focus-within,
#related-posts .article-card:hover,
#related-posts .article-card:focus-within {
  transform: translateY(var(--blog-hover-shift));
  border-top-color: var(--accent);
  box-shadow: var(--shadow-chip);
}

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

.article-card__meta .badge,
.article-meta .badge,
.article-hero__meta .badge {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-body);
}

.blog-post-grid .article-card h2,
#related-posts .article-card h3 {
  margin-block: 1.25rem 0.75rem;
  font-size: var(--blog-subheading-size);
  font-weight: var(--weight-bold);
  line-height: 1.55;
}

.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);
}

.blog-post-grid .article-card > p,
#related-posts .article-card > p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: var(--blog-body-size);
  line-height: 1.8;
}

.article-card__read {
  align-self: flex-start;
  margin-top: auto;
  color: var(--accent-dark);
  font-size: var(--size-small);
  font-weight: var(--weight-semibold);
  text-underline-offset: 0.2em;
}

.blog-empty {
  grid-column: 1 / -1;
  padding: 2rem;
  border: 1px dashed var(--border);
  border-radius: var(--r-m);
  background: var(--panel);
  color: var(--muted);
  line-height: 1.8;
}

.blog-list-promo {
  padding-block: 1rem 3rem;
}

/* All article column boxes use identical outer widths and inner gutters. */
.reading-wrap,
.article-hero,
.breadcrumbs,
.breadcrumb-wrap,
#related-posts,
#post-nav {
  box-sizing: border-box;
  width: 100%;
  max-width: calc(var(--blog-reading) + var(--gutter) + var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

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

.breadcrumb-wrap .breadcrumbs {
  padding-block: 0;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.625rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li + li::before {
  content: "›";
  margin-right: 0.625rem;
  color: var(--muted);
}

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

.breadcrumbs a:hover {
  color: var(--accent-dark);
}

/* Magazine rule: no hero card, tint, or enclosing border. */
.article-hero {
  position: relative;
  padding-block: 1.5rem 1.5rem;
  border: 0;
  border-radius: 0;
  background: none;
  box-shadow: none;
}

.article-hero::before {
  content: "";
  display: block;
  height: var(--blog-rule-width);
  margin-bottom: 1.5rem;
  background: var(--blog-rule-gradient);
}

.article-hero h1 {
  margin: 1.125rem 0;
  color: var(--text);
  font-size: var(--blog-article-title);
  font-weight: var(--weight-display);
  line-height: var(--blog-title-leading);
  text-align: left;
}

.article-meta > time,
.article-hero__meta > time,
.article-meta > span:not(.badge),
.article-hero__meta > span:not(.badge) {
  padding: 0.25rem 0.625rem;
  border: 1px solid var(--border);
  border-radius: var(--r-tag);
  color: var(--muted);
}

.article-hero .article-summary,
.article-hero .article-hero__summary,
.article-hero .lede,
.article-hero > p:last-child {
  margin: 0;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
}

.reading-wrap {
  padding-block: 0 1rem;
}

.reading-wrap .prose,
.reading-wrap.article-body,
.reading-wrap [data-article-body] {
  width: 100%;
  max-width: 100%;
  margin-inline: auto;
  color: var(--text);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
  overflow-wrap: anywhere;
}

.reading-wrap p,
.reading-wrap ul,
.reading-wrap ol {
  margin-block: 1rem;
}

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

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

.reading-wrap h2 {
  position: relative;
  margin-block: 2.25rem 1rem;
  padding-top: 0.875rem;
  color: var(--text);
  font-size: var(--blog-heading-size);
  font-weight: var(--weight-bold);
  line-height: 1.5;
  scroll-margin-top: var(--anchor-space);
}

.reading-wrap h2::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 2rem;
  height: var(--blog-callout-width);
  border-radius: var(--r-xs);
  background: var(--accent);
}

.reading-wrap .prose > h2:first-child,
.reading-wrap .prose > section:first-child > h2:first-child,
.reading-wrap.article-body > h2:first-child {
  margin-top: 0.75rem;
}

.reading-wrap h3 {
  margin-block: 1.5rem 0.75rem;
  color: var(--text);
  font-size: var(--blog-subheading-size);
  line-height: 1.6;
}

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

.reading-wrap hr {
  margin-block: 2rem;
  border: 0;
  border-top: 1px solid var(--border);
}

.reading-wrap code {
  padding: 0.15em 0.35em;
  border-radius: var(--r-xs);
  background: var(--panel-2);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.9em;
  white-space: break-spaces;
  overflow-wrap: anywhere;
}

.reading-wrap pre {
  position: relative;
  max-width: 100%;
  margin-block: 1.5rem;
  padding: 3rem 1.25rem 1.25rem;
  border: 1px solid var(--ink-line);
  border-radius: var(--r-m);
  background: var(--blog-code-bg);
  color: var(--blog-code-ink);
  overflow-x: auto;
}

.reading-wrap pre::before {
  content: "VPNWine / 操作笔记";
  position: absolute;
  top: 0.75rem;
  left: 1.25rem;
  color: var(--ink-muted);
  font-family: var(--font-mono);
  font-size: var(--blog-meta-size);
}

.reading-wrap pre code {
  display: block;
  padding: 0;
  border: 0;
  background: none;
  color: var(--blog-code-ink);
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
}

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

.reading-wrap table {
  width: 100%;
  max-width: 100%;
  margin-block: 1.5rem;
  border-collapse: collapse;
  font-size: var(--size-small);
  line-height: 1.8;
}

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

.reading-wrap th,
.reading-wrap td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.reading-wrap thead th {
  background: var(--accent-dark);
  color: var(--on-accent);
  font-weight: var(--weight-semibold);
}

.reading-wrap tbody tr {
  background: var(--panel);
}

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

.reading-wrap tbody tr:hover {
  background: var(--rose-tint);
}

.reading-wrap blockquote,
.reading-wrap .callout {
  position: relative;
  margin: 1.5rem 0;
  padding: 1.125rem 1.25rem 1.125rem 3.25rem;
  border: 0;
  border-inline-start: var(--blog-callout-width) solid var(--accent);
  border-radius: var(--r-s);
  background: var(--rose-tint);
  color: var(--text);
  font-style: normal;
}

.reading-wrap blockquote::before,
.reading-wrap .callout::before {
  content: "i";
  position: absolute;
  top: 1.25rem;
  left: 1rem;
  display: inline-block;
  width: 1.4rem;
  height: 1.4rem;
  border: 1px solid var(--accent);
  border-radius: var(--r-key);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--size-small);
  font-weight: var(--weight-bold);
  line-height: 1.3rem;
  text-align: center;
}

.reading-wrap .callout--warning,
.reading-wrap .callout.warning {
  border-inline-start-color: var(--warn);
  background: var(--blog-warning-bg);
}

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

.reading-wrap .callout--success,
.reading-wrap .callout.success {
  border-inline-start-color: var(--success);
  background: var(--blog-success-bg);
}

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

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

.reading-wrap blockquote > :last-child,
.reading-wrap .callout > :last-child,
.reading-wrap .verdict > :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(--border);
  border-top: var(--blog-rule-width) solid var(--accent);
  border-radius: var(--r-m);
  background: var(--rose-tint);
}

.stat-card:nth-child(even) {
  border-top-color: var(--warn);
  background: var(--amber-tint);
}

.stat-num {
  display: block;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: var(--blog-stat-size);
  font-weight: var(--weight-bold);
  line-height: 1.4;
  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(--size-small);
  line-height: 1.8;
}

.reading-wrap .check-list {
  display: grid;
  gap: 0.625rem;
  margin-block: 1.5rem;
  padding: 0;
  list-style: none;
}

.reading-wrap .check-list li {
  margin: 0;
  padding: 0.875rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-s);
  background: var(--panel);
}

.reading-wrap .check-list li:nth-child(even) {
  background: var(--panel-2);
}

.reading-wrap .verdict {
  margin-block: 1.5rem;
  padding: 1rem 1.25rem;
  border-inline-start: var(--blog-rule-width) solid var(--accent);
  border-radius: var(--r-s);
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow-chip);
}

.verdict > strong:first-child,
.verdict p > strong:first-child {
  color: var(--accent-dark);
}

.promo-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  box-sizing: border-box;
  max-width: 100%;
  margin-block: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-m);
  background: var(--blog-promo-bg);
  color: var(--blog-promo-ink);
  box-shadow: inset 0 1px 0 var(--hl-soft);
}

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

.promo-block__copy > strong {
  color: var(--blog-promo-ink);
  font-family: var(--font-display);
  font-size: var(--blog-subheading-size);
  font-weight: var(--weight-brand);
}

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

.promo-block__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.promo-block .btn--primary {
  border-color: var(--panel);
  background: var(--panel);
  color: var(--accent-dark);
  text-decoration: none;
}

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

.promo-block .btn--ghost {
  border-color: var(--blog-promo-ink);
  background: none;
  color: var(--blog-promo-ink);
  text-decoration: none;
}

.promo-block .btn:focus-visible {
  outline-color: var(--blog-promo-ink);
}

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

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

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

#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 1.5rem;
}

.post-nav-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.625rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-top: var(--blog-rule-width) solid var(--border);
  border-radius: var(--r-m);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--duration-fast) var(--ease), transform var(--duration-fast) var(--ease);
}

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

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

.post-nav-card__label,
.post-nav-card time {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--blog-meta-size);
}

.post-nav-card strong {
  color: var(--text);
  font-size: var(--blog-body-size);
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.post-nav-card time {
  margin-top: auto;
}

/* Reserved for article landing pages; the blog index does not mount this control. */
.float-cta {
  position: fixed;
  z-index: 40;
  right: max(var(--gutter), env(safe-area-inset-right));
  bottom: max(1.25rem, env(safe-area-inset-bottom));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  max-width: calc(100vw - var(--gutter) - var(--gutter));
  min-height: 3rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: var(--shadow-cta);
  font-family: var(--font-body);
  font-size: var(--size-small);
  font-weight: var(--weight-semibold);
  line-height: 1.5;
  text-decoration: none;
}

.float-cta svg {
  flex: 0 0 auto;
  width: 1.125rem;
  height: 1.125rem;
  stroke: currentColor;
  fill: none;
}

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

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

@media (max-width: 860px) {
  .reading-wrap table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }

  .reading-wrap .table-scroll table {
    display: table;
    width: 100%;
    max-width: none;
  }

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

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

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

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

  .article-hero {
    padding-top: 1rem;
  }

  .article-hero h1 {
    font-size: min(var(--blog-article-title), 2.25rem);
  }

  .blog-filter {
    gap: 0.5rem;
  }

  .blog-filter button {
    padding-inline: 0.75rem;
  }

  .promo-block {
    align-items: flex-start;
  }

  .promo-block__actions {
    width: 100%;
  }

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

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

  .float-cta {
    min-height: 2.75rem;
    padding: 0.625rem 1rem;
    bottom: max(0.75rem, env(safe-area-inset-bottom));
  }

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

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

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

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