.blog-hero {
  padding-bottom: 0.5rem;
}

.blog-lead {
  max-width: 640px;
  color: var(--ink-dim);
  font-size: 1.02rem;
  line-height: 1.7;
  margin-top: 0.5rem;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.6rem;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  padding: 0.45rem 0.9rem;
  border: var(--line-w) solid var(--rule);
  border-radius: var(--rad-s);
  background: var(--paper-lift);
  color: var(--ink-dim);
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.filter-btn:hover {
  border-color: var(--pine);
  color: var(--pine-deep);
}

.filter-btn.is-active {
  background: var(--pine);
  border-color: var(--pine);
  color: var(--paper-lift);
}

.post-empty {
  padding: 2rem 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.post-hero {
  padding-bottom: 0.5rem;
}

.post-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.9rem;
}

.read-time {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-dim);
  border: var(--line-w) solid var(--rule);
  border-radius: var(--rad-s);
  padding: 0.2rem 0.55rem;
}

.post-summary {
  max-width: 680px;
  color: var(--ink-dim);
  font-size: 1.02rem;
  line-height: 1.7;
  margin-top: 0.6rem;
}

.crumb {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-dim);
  margin: 1.4rem 0 1rem;
}

.crumb > a {
  color: var(--ink-dim);
  text-decoration: none;
  border-bottom: var(--line-w) dashed var(--rule);
}

.crumb > a:hover {
  color: var(--pine-deep);
  border-color: var(--pine);
}

.crumb-sep {
  margin: 0 0.4rem;
  color: var(--rule);
}

.crumb-cur {
  color: var(--ink);
}

.post-body {
  max-width: 720px;
}

.post-body h2 {
  margin-top: 2.4rem;
  margin-bottom: 0.8rem;
  font-size: 1.4rem;
  border-bottom: var(--line-w) solid var(--rule);
  padding-bottom: 0.5rem;
}

.post-body h3 {
  margin-top: 1.8rem;
  margin-bottom: 0.6rem;
  font-size: 1.14rem;
}

.post-body p {
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 1rem;
}

.post-body ul,
.post-body ol {
  margin: 0 0 1.1rem 1.3rem;
  line-height: 1.8;
  color: var(--text);
}

.post-body li {
  margin-bottom: 0.4rem;
}

.post-body pre {
  background: var(--paper-deep);
  border: var(--line-w) solid var(--rule);
  border-radius: var(--rad-s);
  padding: 0.9rem 1rem;
  overflow-x: auto;
  margin-bottom: 1.2rem;
}

.post-body code {
  font-family: var(--font-mono);
  font-size: 0.86rem;
}

.post-body p code {
  background: var(--paper-deep);
  padding: 0.1rem 0.35rem;
  border-radius: var(--rad-s);
  border: var(--line-w) solid var(--rule);
}

.post-body blockquote {
  border-left: 3px solid var(--pine);
  padding: 0.2rem 0 0.2rem 1rem;
  color: var(--ink-dim);
  margin: 0 0 1.2rem;
}

.post-dl-cta {
  margin-top: 3rem;
  padding: 1.6rem;
  border: var(--line-w) solid var(--rule);
  border-radius: var(--rad-m);
  background: var(--paper-lift);
  box-shadow: var(--press);
  max-width: 720px;
}

.post-dl-cta h3 {
  margin-bottom: 0.5rem;
}

.post-dl-cta p {
  color: var(--ink-dim);
  margin-bottom: 1rem;
}

.post-dl-act {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.related-wrap {
  margin-top: 3.2rem;
  max-width: 900px;
}

.related-head {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 1.2rem;
  padding-bottom: 0.6rem;
  border-bottom: var(--line-w) solid var(--rule);
}

.related-head .sec-code {
  font-family: var(--font-mono);
  color: var(--pine-deep);
  font-size: 0.85rem;
}

.related-head h2 {
  font-size: 1.2rem;
  margin: 0;
}

/* 上一篇 / 下一篇导航 */
#post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.4rem;
  max-width: 900px;
}

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1rem 1.2rem;
  border: var(--line-w) solid var(--rule);
  border-radius: var(--rad-m);
  background: var(--paper-lift);
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.post-nav-card:hover {
  border-color: var(--pine);
  box-shadow: var(--press);
}

.post-nav-card.is-next {
  text-align: right;
  grid-column: 2;
}

.post-nav-card.is-prev {
  grid-column: 1;
}

.post-nav-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-dim);
  letter-spacing: 0.02em;
}

.post-nav-title {
  color: var(--ink);
  font-size: 0.95rem;
  line-height: 1.5;
  font-weight: 600;
}

.post-nav-card:hover .post-nav-title {
  color: var(--pine-deep);
}

@media (max-width: 640px) {
  #post-nav {
    grid-template-columns: 1fr;
  }
  .post-nav-card.is-prev,
  .post-nav-card.is-next {
    grid-column: auto;
  }
}

/* 文末下载引导弹窗 */
.dlm-mask {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(36, 40, 31, 0.45);
}

.dlm-panel {
  position: relative;
  width: 100%;
  max-width: 420px;
  padding: 1.8rem 1.6rem 1.6rem;
  background: var(--paper-lift);
  border: var(--line-w) solid var(--rule);
  border-radius: var(--rad-m);
  box-shadow: var(--press);
}

.dlm-panel h3 {
  margin: 0 0 0.6rem;
  font-size: 1.25rem;
  color: var(--ink);
}

.dlm-panel p {
  margin: 0 0 1.2rem;
  color: var(--ink-dim);
  line-height: 1.7;
  font-size: 0.95rem;
}

.dlm-close {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  width: 2rem;
  height: 2rem;
  border: var(--line-w) solid var(--rule);
  border-radius: var(--rad-s);
  background: var(--paper);
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
}

.dlm-close:hover {
  border-color: var(--pine);
  color: var(--pine-deep);
}