:root {
  --color-canvas: #faf5ea;
  --color-surface: #fffdf6;
  --color-surface-soft: #f1e7d3;
  --color-border: #e3d6bc;
  --color-accent: #9c6a08;
  --color-accent-deep: #744e04;
  --color-ink: #2c2417;
  --color-ink-muted: #6f6353;
  --color-success: #3e7a3c;
  --color-warning: #c2571b;
  --color-error: #b3362b;
  --color-paper-light: #ffffff;
  --color-code-ink: #f8eedb;
  --color-transparent: transparent;
  --font-display: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;
  --radius-xs: 0.25rem;
  --radius-sm: 0.45rem;
  --radius-md: 0.75rem;
  --shadow-card: 0 0.8rem 2.2rem color-mix(in srgb, var(--color-ink) 8%, var(--color-transparent));
  --shadow-button: 0 0.4rem 1rem color-mix(in srgb, var(--color-accent-deep) 18%, var(--color-transparent));
  --content-width: 74rem;
  --blog-reading-width: 56rem;
  --gutter: clamp(1.25rem, 4vw, 2rem);
  --blog-section-gap: clamp(3.5rem, 7vw, 6rem);
  --blog-card-gap: clamp(1rem, 2vw, 1.5rem);
  --blog-transition: 180ms ease;
}

.no-break {
  white-space: nowrap;
}

.blog-index-hero {
  max-width: var(--blog-reading-width);
  padding-block: clamp(5rem, 10vw, 8rem) clamp(3.5rem, 7vw, 5.5rem);
  text-align: center;
}

.blog-kicker,
.section-kicker,
.article-kicker {
  margin: 0 0 1rem;
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.blog-index-hero h1 {
  max-width: 48rem;
  margin: 0 auto;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 3rem);
  line-height: 1.14;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.blog-index-hero h1::after {
  display: block;
  width: 3.5rem;
  height: 0.2rem;
  margin: 1.5rem auto;
  border-radius: var(--radius-xs);
  background: var(--color-accent);
  content: "";
}

.blog-index-hero > p:last-child {
  max-width: 42rem;
  margin: 0 auto;
  color: var(--color-ink-muted);
  font-size: 1.05rem;
  line-height: 1.85;
}

.blog-catalog {
  padding-block: 0 var(--blog-section-gap);
}

.blog-catalog-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: end;
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.blog-catalog-head h2,
.blog-index-promo h2 {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
}

.tag-filter {
  min-height: 2.5rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-ink-muted);
  font: 700 0.875rem/1 var(--font-body);
  cursor: pointer;
  transition:
    border-color var(--blog-transition),
    background-color var(--blog-transition),
    color var(--blog-transition),
    transform var(--blog-transition);
}

.tag-filter:hover,
.tag-filter:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent-deep);
  transform: translateY(-0.1rem);
}

.tag-filter.is-active {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-paper-light);
}

.article-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--blog-card-gap);
}

.article-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 19rem;
  flex-direction: column;
  padding: clamp(1.4rem, 3vw, 2rem);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
  transition:
    border-color var(--blog-transition),
    box-shadow var(--blog-transition),
    transform var(--blog-transition);
}

.article-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 0.2rem;
  background: var(--color-accent);
  content: "";
  opacity: 0;
  transition: opacity var(--blog-transition);
}

.article-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 1rem 2.5rem color-mix(in srgb, var(--color-ink) 11%, var(--color-transparent));
  transform: translateY(-0.2rem);
}

.article-card:hover::before {
  opacity: 1;
}

.article-meta,
.related-card-meta,
.article-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.article-tag,
.article-meta > span:first-child,
.related-card-meta > span:first-child {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding-inline: 0.65rem;
  border-radius: var(--radius-xs);
  background: var(--color-accent);
  color: var(--color-paper-light);
  font-family: var(--font-body);
  font-weight: 700;
}

.article-card h3 {
  margin: 1.2rem 0 0.8rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.3vw, 1.45rem);
  line-height: 1.45;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

.article-card > p {
  margin: 0 0 1.4rem;
  color: var(--color-ink-muted);
  font-size: 0.98rem;
  line-height: 1.8;
}

.article-card .text-link {
  width: fit-content;
  margin-top: auto;
  color: var(--color-accent-deep);
  font-weight: 800;
  text-decoration: none;
}

.article-card .text-link:hover,
.article-card .text-link:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

.blog-empty {
  padding: 3rem 1.5rem;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-ink-muted);
  text-align: center;
}

.blog-index-promo,
.article-promo {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: center;
  padding: clamp(1.75rem, 4vw, 3rem);
  overflow: hidden;
  border: 1px solid var(--color-accent-deep);
  border-radius: var(--radius-md);
  background:
    linear-gradient(
      120deg,
      var(--color-accent-deep),
      color-mix(in srgb, var(--color-accent) 88%, var(--color-ink))
    );
  color: var(--color-paper-light);
}

.blog-index-promo::after,
.article-promo::after {
  position: absolute;
  right: -2rem;
  bottom: -3rem;
  width: 11rem;
  height: 11rem;
  border: 1px solid color-mix(in srgb, var(--color-paper-light) 30%, var(--color-transparent));
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.blog-index-promo h2,
.article-promo h2 {
  color: var(--color-paper-light);
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.blog-index-promo p,
.article-promo p {
  max-width: 42rem;
  color: color-mix(in srgb, var(--color-paper-light) 88%, var(--color-accent));
  line-height: 1.75;
}

.article-promo-brand {
  margin: 0 0 0.5rem;
  color: var(--color-paper-light);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.blog-index-promo .button-primary,
.article-promo .button-primary {
  border-color: var(--color-paper-light);
  background: var(--color-paper-light);
  color: var(--color-accent-deep);
  box-shadow: var(--shadow-button);
}

.blog-index-promo .button-secondary,
.article-promo .button-secondary {
  border-color: color-mix(in srgb, var(--color-paper-light) 70%, var(--color-transparent));
  background: var(--color-transparent);
  color: var(--color-paper-light);
}

.breadcrumb {
  width: 100%;
  max-width: calc(var(--blog-reading-width) + (var(--gutter) * 2));
  margin: 0 auto;
  padding: 1.5rem var(--gutter) 0;
  color: var(--color-ink-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li:not(:last-child)::after {
  margin-left: 0.45rem;
  color: var(--color-border);
  content: "/";
}

.breadcrumb a {
  color: var(--color-accent-deep);
  text-decoration: none;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.2rem;
}

.article-hero {
  width: 100%;
  max-width: calc(var(--blog-reading-width) + (var(--gutter) * 2));
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 5.5rem) var(--gutter) clamp(2.5rem, 5vw, 4rem);
  text-align: center;
}

.article-hero .article-kicker {
  margin-bottom: 1.25rem;
}

.article-hero h1 {
  max-width: var(--blog-reading-width);
  margin: 0 auto;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.6rem);
  line-height: 1.24;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.article-hero h1::after {
  display: block;
  width: 3.5rem;
  height: 0.2rem;
  margin: 1.5rem auto;
  border-radius: var(--radius-xs);
  background: var(--color-accent);
  content: "";
}

.article-hero > p {
  max-width: 48rem;
  margin: 0 auto;
  color: var(--color-ink-muted);
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-hero-meta {
  justify-content: center;
  margin: 1.4rem auto 0;
}

.article-hero-meta > * {
  display: inline-flex;
  align-items: center;
  min-height: 1.8rem;
  padding-inline: 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-surface);
}

.article-hero-meta .article-tag {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-paper-light);
}

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

.prose {
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
}

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

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre,
.prose table,
.prose .table-scroll,
.prose .callout,
.prose .stat-grid,
.prose .check-list,
.prose .verdict {
  margin-block: 1.35rem;
}

.prose h2 {
  position: relative;
  margin: 3.25rem 0 1.15rem;
  padding-top: 0.85rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.6rem);
  line-height: 1.4;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.prose h2::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 2.75rem;
  height: 0.2rem;
  border-radius: var(--radius-xs);
  background: var(--color-accent);
  content: "";
}

.prose h3 {
  margin: 2.2rem 0 0.8rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 2vw, 1.3rem);
  line-height: 1.45;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

.prose a {
  color: var(--color-accent-deep);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

.prose li {
  margin-block: 0.45rem;
  padding-left: 0.25rem;
}

.prose blockquote {
  padding: 1.25rem 1.4rem;
  border-left: 0.25rem solid var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 8%, var(--color-surface));
  color: var(--color-ink);
}

.prose blockquote p {
  margin: 0;
}

.prose pre {
  position: relative;
  max-width: 100%;
  padding: 3.2rem 1.3rem 1.3rem;
  overflow-x: auto;
  border: 1px solid color-mix(in srgb, var(--color-ink) 82%, var(--color-border));
  border-radius: var(--radius-sm);
  background: var(--color-ink);
  color: var(--color-code-ink);
  font: 0.875rem/1.75 var(--font-mono);
}

.prose pre::before {
  position: absolute;
  top: 1rem;
  left: 1.15rem;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--color-error);
  box-shadow:
    1.05rem 0 0 var(--color-warning),
    2.1rem 0 0 var(--color-success);
  content: "";
}

.prose pre code {
  padding: 0;
  background: var(--color-transparent);
  color: inherit;
  font: inherit;
}

.prose :not(pre) > code {
  padding: 0.15rem 0.35rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-surface-soft);
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.table-scroll,
.prose > .data-table {
  max-width: 100%;
  overflow-x: auto;
}

.prose table,
.route-table,
.data-table {
  width: 100%;
  min-width: 38rem;
  border-collapse: collapse;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 0.925rem;
}

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

.prose thead th,
.route-table thead th,
.data-table thead th {
  border-color: var(--color-accent-deep);
  background: var(--color-accent-deep);
  color: var(--color-paper-light);
  font-weight: 800;
}

.prose tbody tr:nth-child(even),
.route-table tbody tr:nth-child(even),
.data-table tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--color-surface-soft) 58%, var(--color-surface));
}

.prose tbody tr:hover,
.route-table tbody tr:hover,
.data-table tbody tr:hover {
  background: color-mix(in srgb, var(--color-accent) 10%, var(--color-surface));
}

.callout {
  position: relative;
  padding: 1.25rem 1.35rem 1.25rem 3.7rem;
  border: 1px solid var(--color-border);
  border-left: 0.25rem solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-accent) 7%, var(--color-surface));
}

.callout::before {
  position: absolute;
  top: 1.2rem;
  left: 1.15rem;
  display: grid;
  width: 1.65rem;
  height: 1.65rem;
  place-items: center;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-paper-light);
  content: "i";
  font: 800 0.8rem/1 var(--font-mono);
}

.callout-title {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--color-ink);
}

.callout p {
  margin: 0;
}

.callout.warning {
  border-left-color: var(--color-warning);
  background: color-mix(in srgb, var(--color-warning) 9%, var(--color-surface));
}

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

.callout.success {
  border-left-color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 9%, var(--color-surface));
}

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

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 0.8rem;
}

.stat-card {
  position: relative;
  min-width: 0;
  padding: 1.2rem;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.stat-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 0.22rem;
  background: var(--color-accent);
  content: "";
}

.stat-card:nth-child(even) {
  background: color-mix(in srgb, var(--color-surface-soft) 70%, var(--color-surface));
}

.stat-card:nth-child(even)::before {
  background: var(--color-accent-deep);
}

.stat-num {
  display: block;
  color: var(--color-accent-deep);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1.2;
}

.stat-label {
  display: block;
  margin-top: 0.45rem;
  color: var(--color-ink-muted);
  font-size: 0.875rem;
  line-height: 1.55;
}

.check-list {
  display: grid;
  gap: 0.65rem;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-surface);
}

.verdict {
  padding: 1.2rem 1.35rem;
  border-left: 0.3rem solid var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 9%, var(--color-surface));
  color: var(--color-ink);
}

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

.article-promo {
  width: 100%;
  max-width: var(--blog-reading-width);
  margin: clamp(3rem, 7vw, 5rem) auto 0;
}

#related-posts {
  width: 100%;
  max-width: calc(var(--blog-reading-width) + (var(--gutter) * 2));
  margin-inline: auto;
  padding: 2rem var(--gutter) 1rem;
}

#related-posts > h2 {
  margin: 0 0 1.25rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.6rem);
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.related-card {
  position: relative;
  min-width: 0;
  padding: 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transition:
    border-color var(--blog-transition),
    transform var(--blog-transition);
}

.related-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 0.18rem;
  background: var(--color-accent);
  content: "";
  opacity: 0;
  transition: opacity var(--blog-transition);
}

.related-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-0.18rem);
}

.related-card:hover::before {
  opacity: 1;
}

.related-card h3 {
  margin: 0.85rem 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.55;
  letter-spacing: -0.005em;
  text-wrap: pretty;
}

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

.related-card h3 a::after {
  position: absolute;
  inset: 0;
  content: "";
}

.related-card p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

#post-nav {
  display: grid;
  width: 100%;
  max-width: calc(var(--blog-reading-width) + (var(--gutter) * 2));
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin-inline: auto;
  padding: 1.5rem var(--gutter) 2.5rem;
}

.post-nav-card {
  position: relative;
  display: block;
  min-width: 0;
  padding: 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-ink);
  text-decoration: none;
  transition:
    border-color var(--blog-transition),
    transform var(--blog-transition);
}

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

.post-nav-card:hover,
.post-nav-card:focus-visible {
  border-color: var(--color-accent);
  transform: translateY(-0.15rem);
}

.post-nav-label {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
}

.post-nav-card strong {
  display: block;
  font-size: 0.95rem;
  line-height: 1.55;
}

.float-cta {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 40;
  display: inline-flex;
  gap: 0.55rem;
  align-items: center;
  min-height: 3rem;
  padding: 0.7rem 1rem;
  border: 1px solid var(--color-accent-deep);
  border-radius: 999rem;
  background: var(--color-accent);
  box-shadow: var(--shadow-button);
  color: var(--color-paper-light);
  font-weight: 800;
  text-decoration: none;
  transition:
    background-color var(--blog-transition),
    transform var(--blog-transition);
}

.float-cta:hover,
.float-cta:focus-visible {
  background: var(--color-accent-deep);
  transform: translateY(-0.15rem);
}

.float-cta svg {
  width: 1.1rem;
  height: 1.1rem;
  flex: 0 0 auto;
}

@media (max-width: 860px) {
  .blog-catalog-head {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .blog-filter {
    justify-content: flex-start;
  }

  .article-list {
    grid-template-columns: 1fr;
  }

  .article-card {
    min-height: 0;
  }

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

  .prose table,
  .route-table,
  .data-table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }
}

@media (max-width: 680px) {
  .blog-index-hero {
    padding-block: 4rem 3rem;
  }

  .blog-index-promo,
  .article-promo {
    grid-template-columns: 1fr;
  }

  .article-hero {
    padding-block: 3rem 2.5rem;
  }

  .article-hero-meta {
    gap: 0.4rem;
  }

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

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

  .float-cta {
    right: var(--gutter);
    bottom: max(0.75rem, env(safe-area-inset-bottom));
    max-width: calc(100vw - (var(--gutter) * 2));
    min-height: 2.75rem;
    padding: 0.6rem 0.85rem;
    font-size: 0.875rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tag-filter,
  .article-card,
  .article-card::before,
  .related-card,
  .related-card::before,
  .post-nav-card,
  .float-cta {
    transition: none;
  }

  .tag-filter:hover,
  .article-card:hover,
  .related-card:hover,
  .post-nav-card:hover,
  .post-nav-card:focus-visible,
  .float-cta:hover,
  .float-cta:focus-visible {
    transform: none;
  }
}