/* ===== 博客列表页 ===== */

.blog-hero {
  max-width: 780px;
  margin-bottom: 2.4rem;
}

.blog-hero h1 {
  font-family: var(--fontDisplay);
  font-size: clamp(2.1rem, 5vw, 3.3rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0.9rem 0 0.7rem;
}

.blog-hero-sub {
  margin: 0;
  max-width: 46em;
  color: var(--textMuted);
  font-size: 1.05rem;
  line-height: 1.75;
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0 0 2.4rem;
}

.tag-btn {
  font-family: var(--fontMono);
  font-size: 0.85rem;
  padding: 0.45rem 1rem;
  background: var(--bgPanel);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.tag-btn:hover {
  background: var(--bgPanel2);
}

.tag-btn.is-active {
  background: var(--border);
  color: var(--bgPanel);
}

.tag-btn:focus-visible,
.post-card:focus-visible,
.post-nav-link:focus-visible {
  outline: 3px solid var(--accentDark);
  outline-offset: 2px;
}

.post-list {
  display: flex;
  flex-direction: column;
  border-top: 2px solid var(--border);
  border-bottom: 2px solid var(--border);
}

.post-card {
  display: block;
  background: var(--bgPanel);
  color: var(--text);
  text-decoration: none;
  padding: 1.4rem 1.6rem;
  border-bottom: 1px solid var(--inkA22);
  transition: background-color 0.15s ease;
}

.post-list .post-card:last-child {
  border-bottom: none;
}

.post-card:hover {
  background: var(--accent);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--fontMono);
  font-size: 0.8rem;
  color: var(--textMuted);
  margin-bottom: 0.6rem;
}

.post-card:hover .post-meta {
  color: var(--text);
}

.post-tag {
  display: inline-block;
  padding: 0.15rem 0.7rem;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  background: var(--bgPanel2);
  color: var(--text);
  font-size: 0.75rem;
}

.post-card:hover .post-tag {
  background: var(--bgPanel);
}

.post-card h3 {
  font-family: var(--fontDisplay);
  font-size: 1.25rem;
  line-height: 1.35;
  margin: 0 0 0.5rem;
}

.post-card p {
  margin: 0 0 0.8rem;
  max-width: 60em;
  color: var(--textMuted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.post-card:hover p {
  color: var(--text);
}

.post-more {
  font-family: var(--fontMono);
  font-size: 0.85rem;
  font-weight: 700;
}

.post-empty {
  margin: 0;
  padding: 2rem 1.6rem;
  color: var(--textMuted);
  font-family: var(--fontMono);
  font-size: 0.9rem;
}

.post-fallback {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--border);
}

.post-fallback li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--inkA22);
}

.post-fallback a {
  color: var(--text);
  font-weight: 700;
}

/* ===== 文章页:面包屑 ===== */

.crumbs {
  margin-top: 1.6rem;
  margin-bottom: 2rem;
  font-size: 0.85rem;
}

.crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
}

.crumbs li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--textMuted);
}

.crumbs a {
  color: var(--textMuted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.crumbs a:hover {
  color: var(--text);
  border-bottom-color: var(--border);
}

.crumbs [aria-current="page"] {
  color: var(--text);
  font-weight: 700;
}

/* ===== 文章页:头部与正文 ===== */

.article-hero {
  max-width: 780px;
  margin-bottom: 2.4rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--fontMono);
  font-size: 0.82rem;
  color: var(--textMuted);
  margin-bottom: 1rem;
}

.article-hero h1 {
  font-family: var(--fontDisplay);
  font-size: clamp(1.9rem, 4.2vw, 2.8rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}

.article-lede {
  margin: 0;
  color: var(--textMuted);
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-body {
  max-width: 780px;
}

.article-body h2 {
  font-family: var(--fontDisplay);
  font-size: 1.5rem;
  margin: 2.6rem 0 1rem;
  padding-top: 1.4rem;
  border-top: 2px solid var(--border);
}

.article-body h3 {
  font-family: var(--fontDisplay);
  font-size: 1.15rem;
  margin: 2rem 0 0.8rem;
}

.article-body p {
  margin: 0 0 1.1rem;
  line-height: 1.85;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.2rem;
  padding-left: 1.4em;
}

.article-body li {
  margin-bottom: 0.4rem;
  line-height: 1.85;
}

.article-body code {
  font-family: var(--fontMono);
  font-size: 0.88em;
  background: var(--bgPanel2);
  padding: 0.1em 0.35em;
}

.article-body pre {
  margin: 0 0 1.4rem;
  padding: 1.1rem 1.3rem;
  background: var(--border);
  color: var(--bgPanel);
  font-family: var(--fontMono);
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
}

.article-body pre code {
  background: transparent;
  padding: 0;
}

.article-body blockquote {
  margin: 0 0 1.4rem;
  padding: 0.9rem 1.2rem;
  background: var(--bgPanel);
  border-left: 4px solid var(--border);
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

/* ===== 文章页:文末下载引导卡 ===== */

.dl-cta {
  max-width: 780px;
  margin: 3rem 0;
  padding: 2rem;
  background: var(--bgPanel);
  border: 2px solid var(--border);
  box-shadow: var(--shadow-md);
}

.dl-cta h3 {
  font-family: var(--fontDisplay);
  font-size: 1.3rem;
  margin: 0 0 0.6rem;
}

.dl-cta p {
  margin: 0 0 1.4rem;
  color: var(--textMuted);
  line-height: 1.7;
}

.dl-cta .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

/* ===== 文章页:延伸阅读 ===== */

#related-posts {
  margin: 3rem 0 0;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}

.related-grid .post-card {
  display: flex;
  flex-direction: column;
  padding: 1.2rem 1.3rem;
  border: 2px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.related-grid .post-card h3 {
  font-size: 1.05rem;
}

.related-grid .post-card p {
  flex: 1;
  font-size: 0.88rem;
}

@media (max-width: 900px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== 文章页:上一篇 / 下一篇 ===== */

#post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin: 2.5rem 0 0;
}

#post-nav:empty {
  display: none;
}

.post-nav-link {
  display: block;
  padding: 1.1rem 1.3rem;
  background: var(--bgPanel);
  color: var(--text);
  text-decoration: none;
  border: 2px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: background-color 0.15s ease;
}

.post-nav-link:hover {
  background: var(--accent);
}

.post-nav-dir {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--fontMono);
  font-size: 0.78rem;
  color: var(--textMuted);
}

.post-nav-link:hover .post-nav-dir {
  color: var(--text);
}

.post-nav-title {
  font-weight: 700;
  line-height: 1.5;
}

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

@media (max-width: 720px) {
  #post-nav {
    grid-template-columns: 1fr;
  }

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