:root {
  --blog-reading-width: 48rem;
  --blog-title-max: 2.6rem;
  --blog-list-title-max: 3rem;
  --blog-body-size: 1rem;
  --blog-body-leading: 1.85;
  --blog-space-tight: 0.75rem;
  --blog-space: 1.5rem;
  --blog-space-large: 3.5rem;
}

.blog-hero {
  padding: clamp(4.5rem, 10vw, 8rem) var(--gutter) clamp(3.5rem, 7vw, 6rem);
  text-align: center;
  background: var(--color-bg);
  overflow-x: clip;
}

.blog-hero-inner {
  max-width: 54rem;
  margin-inline: auto;
}

.blog-hero h1 {
  /* 修复(2026-08-16):--blog-list-title-max 是字号变量(3rem),原来误用给 max-width,
     标题列宽被钉成 48px,中文一字一行竖着淌。标题宽度交给 .blog-hero-inner 的 54rem 版心 */
  max-width: 100%;
  margin: 1.25rem auto 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, var(--blog-list-title-max));
  font-weight: 700;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.blog-hero-sub {
  max-width: 38rem;
  margin-inline: auto;
  color: var(--color-muted);
  font-size: 1.125rem;
  line-height: 1.8;
}

.blog-list-section {
  padding-top: var(--blog-space-large);
  padding-bottom: clamp(4rem, 9vw, 7rem);
}

.blog-section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--blog-space);
  margin-bottom: 1.5rem;
}

.blog-section-heading h2 {
  margin: 0.35rem 0 0;
  font-size: 1.75rem;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

.eyebrow {
  margin: 0;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.text-link,
.article-read-link {
  color: var(--color-accent-dark);
  font-weight: 700;
  text-decoration: none;
}

.text-link:hover,
.article-read-link:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-bottom: 2rem;
}

.filter-button {
  min-height: 2.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  color: var(--color-muted);
  cursor: pointer;
  font: inherit;
}

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

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

.article-card,
.related-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.article-card {
  display: flex;
  min-height: 18rem;
  flex-direction: column;
  padding: clamp(1.35rem, 3vw, 2rem);
}

.article-card:nth-child(4n + 2),
.article-card:nth-child(4n + 3) {
  background: var(--color-panel);
}

.article-card .tag,
.related-card .tag {
  align-self: flex-start;
  color: var(--color-accent-dark);
  font-size: 0.8125rem;
  font-weight: 700;
}

.article-card h3,
.related-card h3 {
  margin: 1rem 0 0.8rem;
  font-size: 1.35rem;
  line-height: 1.45;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

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

.article-card h3 a:hover,
.related-card h3 a:hover {
  color: var(--color-accent-dark);
}

.article-card p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.8;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: auto;
  padding-top: 1.5rem;
}

.article-meta {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.blog-empty {
  padding: 2rem;
  border: 1px dashed var(--color-border);
  color: var(--color-muted);
  text-align: center;
}

.breadcrumb {
  max-width: var(--blog-reading-width);
  margin: 0 auto;
  padding-top: 1.5rem;
  color: var(--color-muted);
  font-size: 0.8125rem;
}

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

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

.article-hero,
.article-body {
  width: min(var(--blog-reading-width), calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
}

.article-hero {
  padding: 2.75rem 0 2.5rem;
}

.article-hero .article-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.article-hero h1 {
  max-width: var(--blog-reading-width);
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, var(--blog-title-max));
  line-height: 1.25;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.article-hero .article-summary {
  margin: 0;
  color: var(--color-muted);
  font-size: 1.125rem;
  line-height: 1.8;
}

.article-body {
  color: var(--color-text);
  font-size: var(--blog-body-size);
  line-height: var(--blog-body-leading);
}

.article-body h2 {
  margin: 2.4rem 0 0.9rem;
  font-size: 1.6rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

.article-body h3 {
  margin: 1.8rem 0 0.65rem;
  font-size: 1.3rem;
  line-height: 1.5;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

.article-body p,
.article-body ul,
.article-body ol,
.article-body blockquote,
.article-body pre {
  margin: 0 0 1.15rem;
}

.article-body ul,
.article-body ol {
  padding-left: 1.5rem;
}

.article-body li + li {
  margin-top: 0.45rem;
}

.article-body blockquote {
  margin-inline: 0;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--color-accent);
  background: var(--color-panel);
  color: var(--color-muted);
}

.article-body pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel-2);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

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

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.stat-card {
  padding: 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.stat-num {
  display: block;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
}

.stat-label {
  display: block;
  margin-top: 0.3rem;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.check-list {
  display: grid;
  gap: 0.55rem;
  margin: 1.25rem 0;
  padding: 1rem 1.25rem 1rem 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  list-style: none;
}

.check-list li {
  margin: 0;
}

.verdict {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--color-accent);
  background: var(--color-panel);
}

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

.promo-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin: 3rem auto 0;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.promo-block h2 {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
}

.promo-block p {
  margin: 0;
  color: var(--color-muted);
}

#related-posts {
  width: min(var(--blog-reading-width), calc(100% - (var(--gutter) * 2)));
  margin: 3rem auto 0;
  padding-top: 0;
}

#related-posts h2 {
  margin: 0 0 1rem;
  font-size: 1.6rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.related-card {
  min-width: 0;
  padding: 1rem;
  background: var(--color-panel);
}

.related-card h3 {
  margin: 0.75rem 0;
  font-size: 1rem;
}

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

.post-nav-item {
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.post-nav-next {
  text-align: right;
}

.post-nav-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.post-nav-item a {
  color: var(--color-text);
  font-weight: 700;
  text-decoration: none;
}

.post-nav-item a:hover {
  color: var(--color-accent-dark);
}

.float-cta {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  max-width: calc(100vw - 2rem);
  padding: 0.8rem 1.1rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: var(--shadow-cta);
  color: var(--color-bg);
  font-weight: 700;
  text-decoration: none;
}

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

@media (max-width: 700px) {
  .blog-section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .article-hero {
    padding-top: 2rem;
  }

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

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

  .post-nav-next {
    text-align: left;
  }

  .float-cta {
    right: 1rem;
    bottom: 1rem;
    left: 1rem;
    justify-content: center;
  }
}