/* VPNUQ 连接记录台：文章与索引 */
:root {
  --blog-column: 56rem;
  --blog-gutter: 1.5rem;
  --blog-ink: color-mix(in srgb, var(--text) 91%, var(--accent));
  --blog-tint: color-mix(in srgb, var(--accent) 8%, var(--bg-panel));
  --blog-shadow: 0 18px 48px color-mix(in srgb, var(--accent) 10%, transparent);
}

.blog-page,
.article-page {
  overflow-x: clip;
}

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

.reading-wrap {
  /* 与 article-hero 共用同一外盒宽度及内衬，覆盖基础样式的阅读列宽度。 */
  max-width: calc(var(--blog-column) + 2 * var(--blog-gutter));
  width: 100%;
  padding-inline: var(--blog-gutter);
  margin-inline: auto;
}

.blog-list-hero {
  padding-block: clamp(4rem, 8vw, 7rem) clamp(3rem, 6vw, 5rem);
  text-align: center;
}

.blog-kicker,
.article-kicker,
.section-eyebrow {
  margin: 0 0 1.25rem;
  color: var(--accent-dark);
  font-family: var(--f-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.blog-list-hero h1,
.article-hero h1,
.blog-entry h3,
.related-card strong,
.post-nav-card strong {
  text-wrap: pretty;
  overflow-wrap: break-word;
}

.blog-list-hero h1 {
  max-width: var(--blog-column);
  margin: 0 auto;
  color: var(--text);
  font-family: var(--f-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.blog-list-hero h1::after,
.article-hero h1::after {
  display: block;
  width: 3.5em;
  height: 0.2rem;
  margin: 1.5rem auto 0;
  border-radius: var(--r-pill);
  background: var(--accent);
  content: "";
}

.blog-intro {
  max-width: 40rem;
  margin: 1.5rem auto 0;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.85;
}

.blog-hero-meta {
  margin: 1.5rem 0 0;
  color: var(--text-muted);
  font-family: var(--f-mono);
  font-size: 0.8rem;
}

.blog-catalog {
  padding-bottom: 5rem;
}

.catalog-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.catalog-heading .section-eyebrow {
  margin-bottom: 0.5rem;
}

.catalog-heading h2,
#related-posts > h2 {
  margin: 0;
  font-family: var(--f-display);
  font-size: clamp(1.35rem, 3vw, 1.6rem);
  letter-spacing: -0.01em;
}

.post-count {
  margin: 0;
  color: var(--text-muted);
  font-family: var(--f-mono);
  font-size: 0.8rem;
  white-space: nowrap;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  padding-block: 1.5rem 2rem;
}

.filter-button {
  min-height: 2.7rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg-panel);
  color: var(--text-muted);
  font: 600 0.88rem var(--f-body);
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease, color 180ms ease;
}

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

.filter-button.is-active {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--bg-panel);
}

.filter-button:focus-visible,
.blog-entry a:focus-visible,
.related-card:focus-visible,
.post-nav-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.article-list {
  display: grid;
  gap: 1rem;
}

.blog-entry {
  position: relative;
  padding: clamp(1.4rem, 4vw, 2rem);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-panel);
  box-shadow: 0 8px 32px color-mix(in srgb, var(--accent) 6%, transparent);
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.blog-entry::before,
.related-card::before,
.post-nav-card::before {
  position: absolute;
  top: 0;
  right: 1.5rem;
  left: 1.5rem;
  height: 2px;
  border-radius: var(--r-pill);
  background: var(--accent);
  content: "";
  opacity: 0;
  transition: opacity 180ms ease;
}

.blog-entry:hover,
.related-card:hover,
.post-nav-card:hover {
  border-color: var(--accent);
  box-shadow: var(--blog-shadow);
  transform: translateY(-2px);
}

.blog-entry:hover::before,
.related-card:hover::before,
.post-nav-card:hover::before {
  opacity: 1;
}

.entry-meta,
.related-meta,
.article-meta,
.hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  color: var(--text-muted);
  font-family: var(--f-mono);
  font-size: 0.78rem;
}

.entry-meta .badge,
.related-meta .badge,
.article-meta .badge,
.hero-meta .badge {
  padding: 0.3rem 0.7rem;
  border-radius: var(--r-pill);
  background: var(--blog-tint);
  color: var(--accent-dark);
  font-family: var(--f-body);
  font-size: 0.75rem;
  font-weight: 700;
}

.blog-entry h3 {
  margin: 1rem 0 0.6rem;
  font-family: var(--f-display);
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  line-height: 1.45;
  letter-spacing: -0.01em;
}

.entry-summary {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.8;
}

.entry-link,
.related-arrow {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent-dark);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
}

.empty-posts {
  margin: 0;
  padding: 2rem;
  border: 1px dashed var(--border);
  border-radius: var(--r-md);
  color: var(--text-muted);
  text-align: center;
}

/* 单列刊头：不设卡片底色，短线与等宽刊名承担装饰。 */
.article-breadcrumb,
.breadcrumbs {
  margin-top: 1.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.7;
}

.article-breadcrumb a,
.breadcrumbs a {
  color: var(--accent-dark);
  text-decoration: none;
}

.article-breadcrumb a:hover,
.breadcrumbs a:hover {
  text-decoration: underline;
}

.article-hero {
  padding-block: clamp(3rem, 6vw, 5rem) 2.5rem;
  text-align: center;
}

.article-hero .article-kicker,
.article-hero .blog-kicker {
  margin-bottom: 1.4rem;
}

.article-hero h1 {
  margin: 0;
  color: var(--text);
  font-family: var(--f-display);
  font-size: clamp(1.9rem, 4.5vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.article-hero .article-summary,
.article-hero .summary,
.article-hero > p:not(.article-kicker):not(.blog-kicker) {
  max-width: 42rem;
  margin: 1.4rem auto 0;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.85;
}

.article-hero .article-meta,
.article-hero .hero-meta {
  justify-content: center;
  width: fit-content;
  max-width: 100%;
  margin: 1.5rem auto 0;
  text-align: left;
}

.article-meta time,
.article-meta .read-time,
.hero-meta time,
.hero-meta .read-time {
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
}

.reading-wrap {
  padding-bottom: 1rem;
}

.reading-wrap > .prose {
  max-width: 100%;
}

.prose {
  margin-inline: auto;
  color: var(--blog-ink);
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.9;
  overflow-wrap: break-word;
  counter-reset: article-section;
}

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

.prose p,
.prose ul,
.prose ol,
.prose blockquote {
  margin-block: 0 1.35rem;
}

.prose h2,
.prose h3 {
  color: var(--text);
  font-family: var(--f-display);
  text-wrap: pretty;
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.prose h2 {
  margin: 2.7rem 0 1.1rem;
  font-size: clamp(1.3rem, 3vw, 1.6rem);
  counter-increment: article-section;
}

.prose h2::before {
  display: inline-block;
  margin-right: 0.7rem;
  color: var(--accent-dark);
  content: counter(article-section, decimal-leading-zero) " /";
  font: 700 0.73em var(--f-mono);
  vertical-align: 0.08em;
}

.prose h3 {
  margin: 2rem 0 0.8rem;
  font-size: clamp(1.12rem, 2.5vw, 1.3rem);
}

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

.prose li {
  padding-left: 0.2rem;
  margin-bottom: 0.45rem;
}

.prose blockquote {
  padding: 1.1rem 1.5rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--blog-tint);
  color: var(--text);
}

.prose blockquote > :last-child {
  margin-bottom: 0;
}

.prose .table-scroll {
  max-width: 100%;
  margin-block: 1.5rem;
  overflow-x: auto;
}

.prose table,
.prose .data-table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
  font-size: 0.91rem;
  line-height: 1.6;
}

.prose th,
.prose td {
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.prose thead th {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
  color: var(--bg-panel);
  font-weight: 700;
}

.prose tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--bg-panel-2) 45%, var(--bg-panel));
}

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

.prose pre {
  position: relative;
  max-width: 100%;
  margin: 1.5rem 0;
  padding: 2.3rem 1.3rem 1.3rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-md);
  background: var(--text);
  color: var(--bg-panel);
  overflow-x: auto;
  font: 0.85rem/1.7 var(--f-mono);
}

.prose pre::before {
  position: absolute;
  top: 0.75rem;
  left: 1.3rem;
  color: var(--bg-panel-2);
  content: "●  ●  ●";
  font-size: 0.7rem;
  letter-spacing: 0.2em;
}

.prose code {
  font-family: var(--f-mono);
  overflow-wrap: anywhere;
}

.prose pre code {
  color: inherit;
  overflow-wrap: normal;
}

.prose :not(pre) > code {
  padding: 0.12rem 0.35rem;
  border-radius: var(--r-sm);
  background: var(--bg-panel-2);
  font-size: 0.88em;
}

.prose .callout {
  position: relative;
  margin-block: 1.5rem;
  padding: 1.1rem 1.3rem 1.1rem 3.2rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--blog-tint);
}

.prose .callout::before {
  position: absolute;
  top: 1.1rem;
  left: 1rem;
  display: grid;
  width: 1.35rem;
  height: 1.35rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: var(--r-pill);
  color: var(--accent-dark);
  content: "i";
  font: 700 0.8rem var(--f-mono);
}

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

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

.prose .callout.success {
  border-left-color: var(--success);
  background: color-mix(in srgb, var(--success) 10%, var(--bg-panel));
}

.prose .callout.success::before {
  color: var(--success);
  content: "✓";
}

.prose .stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr));
  gap: 0.8rem;
  margin-block: 1.5rem;
}

.prose .stat-card {
  position: relative;
  padding: 1.2rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-panel);
  overflow: hidden;
}

.prose .stat-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: var(--accent);
  content: "";
}

.prose .stat-card:nth-child(even) {
  background: color-mix(in srgb, var(--bg-panel-2) 60%, var(--bg-panel));
}

.prose .stat-card:nth-child(even)::before {
  background: var(--success);
}

.prose .stat-num {
  display: block;
  color: var(--accent-dark);
  font: 800 clamp(1.4rem, 3vw, 1.9rem)/1.35 var(--f-display);
}

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

.prose .stat-label {
  display: block;
  margin-top: 0.35rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

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

.prose .check-list li {
  padding: 0.8rem 1rem;
  margin: 0 0 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-panel);
  list-style: none;
}

.prose .verdict {
  margin-block: 1.6rem;
  padding: 1.15rem 1.4rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--blog-tint);
  color: var(--text);
}

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

.article-afterword,
.promo-block {
  margin-block: 2rem;
}

.promo-block {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.4rem);
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-lg);
  background: linear-gradient(125deg, var(--accent-dark), var(--accent));
  color: var(--bg-panel);
  overflow: hidden;
}

.promo-block::before {
  position: absolute;
  top: 0.8rem;
  right: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  border-top: 1px solid color-mix(in srgb, var(--bg-panel) 65%, transparent);
  border-right: 1px solid color-mix(in srgb, var(--bg-panel) 65%, transparent);
  border-radius: 0 var(--r-sm) 0 0;
  content: "";
  pointer-events: none;
}

.promo-block strong {
  font-family: var(--f-display);
  font-size: 1.25rem;
}

.promo-block p {
  margin: 0.45rem 0 0;
  color: var(--bg-panel);
  line-height: 1.7;
}

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

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

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

#related-posts {
  padding-block: 2rem 0;
}

#related-posts > h2 {
  margin-bottom: 1.25rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.related-card,
.post-nav-card {
  position: relative;
  display: block;
  min-width: 0;
  padding: 1.2rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-panel);
  color: var(--text);
  text-decoration: none;
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.related-card strong,
.post-nav-card strong {
  display: block;
  margin-top: 0.9rem;
  font-size: 0.98rem;
  line-height: 1.6;
}

.related-meta {
  font-size: 0.7rem;
}

.related-arrow {
  margin-top: 0.9rem;
  font-size: 0.8rem;
}

#post-nav {
  padding-block: 1.5rem 3rem;
}

.post-nav-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.post-nav-newer {
  grid-column: 2;
  text-align: right;
}

.post-nav-label {
  color: var(--accent-dark);
  font-family: var(--f-mono);
  font-size: 0.78rem;
  font-weight: 700;
}

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

@media (max-width: 640px) {
  .blog-filters {
    flex-wrap: nowrap;
    margin-right: calc(-1 * var(--blog-gutter));
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .filter-button {
    flex: none;
  }

  .catalog-heading {
    align-items: start;
  }

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

  .promo-block {
    align-items: stretch;
    flex-direction: column;
  }

  .promo-block .btn-primary {
    align-self: flex-start;
  }

  .article-hero {
    padding-block: 2.5rem 1.75rem;
  }

  .prose h2 {
    margin-top: 2.2rem;
  }
}

@media (max-width: 480px) {
  .post-nav-grid {
    grid-template-columns: 1fr;
  }

  .post-nav-newer {
    grid-column: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .filter-button,
  .blog-entry,
  .blog-entry::before,
  .related-card,
  .related-card::before,
  .post-nav-card,
  .post-nav-card::before {
    transition: none;
  }

  .blog-entry:hover,
  .related-card:hover,
  .post-nav-card:hover {
    transform: none;
  }
}