.blog-hero {
  padding-bottom: 40px;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  margin-top: 28px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  margin-top: 20px;
}

.post-card {
  background: var(--c-panel);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.post-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.post-card-date {
  color: var(--c-mute);
  font-size: 12px;
}

.post-card h3 {
  font-size: 17px;
  line-height: 1.4;
  margin: 0;
}

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

.post-card h3 a:hover {
  color: var(--c-accent);
}

.post-card p {
  color: var(--c-mute);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
  flex: 1;
}

.post-card-more {
  color: var(--c-accent);
  font-family: var(--f-mono);
  font-size: 13px;
  text-decoration: none;
  align-self: flex-start;
}

.tag-filter {
  display: flex;
  gap: 1px;
  border: 1px solid var(--c-line);
  width: fit-content;
  margin-bottom: 8px;
}

.tag-filter button {
  background: var(--c-panel);
  color: var(--c-mute);
  border: none;
  padding: 9px 18px;
  font-family: var(--f-body);
  font-size: 13px;
  cursor: pointer;
  border-right: 1px solid var(--c-line);
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.tag-filter button:last-child {
  border-right: none;
}

.tag-filter button:hover {
  color: var(--c-text);
}

.tag-filter button.on {
  background: var(--c-panel-2);
  color: var(--c-accent);
}

/* 面包屑 */
.crumbs {
  font-size: 13px;
  color: var(--c-mute);
  margin-bottom: 24px;
}

.crumbs a {
  color: var(--c-mute);
  text-decoration: none;
}

.crumbs a:hover {
  color: var(--c-accent);
}

.crumbs .sep {
  margin: 0 6px;
  color: var(--c-line);
}

.crumbs span:last-child {
  color: var(--c-text);
}

/* 文章 Hero */
.post-hero {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 40px;
}

.post-hero-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--c-mute);
  font-size: 13px;
}

.post-hero-meta .mono {
  color: var(--c-mute);
}

.post-hero h1 {
  font-size: 32px;
  line-height: 1.35;
  margin: 0 0 16px;
}

.post-hero-summary {
  color: var(--c-mute);
  font-size: 15px;
  line-height: 1.8;
  max-width: 820px;
}

/* 正文排版 */
.article {
  max-width: 780px;
}

.article h2 {
  font-size: 22px;
  margin: 48px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--c-line-soft);
}

.article h2:first-child {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.article h3 {
  font-size: 17px;
  margin: 28px 0 12px;
  color: var(--c-text);
}

.article p {
  color: var(--c-text);
  font-size: 15px;
  line-height: 1.85;
  margin: 0 0 16px;
}

.article ul,
.article ol {
  margin: 0 0 20px;
  padding-left: 0;
  list-style: none;
}

.article ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  color: var(--c-text);
  font-size: 15px;
  line-height: 1.75;
}

.article ul li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--c-mute);
}

.article ol {
  counter-reset: art-ol;
}

.article ol li {
  position: relative;
  padding-left: 34px;
  margin-bottom: 12px;
  color: var(--c-text);
  font-size: 15px;
  line-height: 1.75;
  counter-increment: art-ol;
}

.article ol li::before {
  content: counter(art-ol);
  position: absolute;
  left: 0;
  top: 0;
  width: 22px;
  height: 22px;
  border: 1px solid var(--c-line);
  color: var(--c-mute);
  font-family: var(--f-mono);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.article pre {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 0 0 20px;
}

.article pre code {
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--c-text);
  line-height: 1.7;
}

.article blockquote {
  border-left: 2px solid var(--c-accent);
  padding: 4px 0 4px 18px;
  margin: 0 0 20px;
  color: var(--c-mute);
  font-size: 14px;
  line-height: 1.75;
}

.article strong {
  color: var(--c-text);
}

/* 文末下载引导卡 */
.endcta {
  margin-top: 56px;
  padding: 32px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
}

.endcta h2 {
  margin: 0 0 12px;
  font-size: 20px;
  border-top: none;
  padding-top: 0;
}

.endcta p {
  color: var(--c-mute);
  font-size: 14px;
  line-height: 1.75;
  margin: 0 0 20px;
}

/* 延伸阅读 / 上下篇 */
#related-posts {
  margin-top: 56px;
}

#related-posts h2 {
  font-size: 20px;
  margin: 0 0 4px;
  border-top: none;
  padding-top: 0;
}

#post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  margin-top: 32px;
}

.post-nav-item {
  background: var(--c-panel);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
  min-width: 0;
}

.post-nav-empty {
  background: var(--c-bg);
}

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

.post-nav-dir {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--c-accent);
  text-transform: uppercase;
}

.post-nav-title {
  color: var(--c-text);
  font-size: 14px;
  line-height: 1.6;
}

.post-nav-item:hover .post-nav-title {
  color: var(--c-accent);
}

/* 下载弹窗 */
.dlm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 11, 13, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 500;
  opacity: 0;
  transition: opacity 0.2s var(--ease);
}

.dlm-overlay.on {
  opacity: 1;
}

.dlm-panel {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: var(--c-panel-2);
  border: 1px solid var(--c-line);
  padding: 32px;
  transform: translateY(8px);
  transition: transform 0.2s var(--ease);
}

.dlm-overlay.on .dlm-panel {
  transform: translateY(0);
}

.dlm-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 28px;
  height: 28px;
  border: 1px solid var(--c-line);
  background: transparent;
  color: var(--c-mute);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.dlm-close:hover {
  color: var(--c-text);
  border-color: var(--c-accent);
}

.dlm-brand {
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--c-accent);
  margin: 0 0 8px;
  text-transform: uppercase;
}

.dlm-panel h2 {
  font-size: 19px;
  margin: 0 0 12px;
  color: var(--c-text);
}

.dlm-desc {
  color: var(--c-mute);
  font-size: 14px;
  line-height: 1.7;
  margin: 0 0 22px;
}

@media (max-width: 760px) {
  .post-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }
  #post-nav {
    grid-template-columns: 1fr;
  }
  .post-nav-next {
    text-align: left;
  }
}