/* ===== 博客列表 Hero ===== */
.blog-hero {
  padding-top: 3rem;
  padding-bottom: 1.5rem;
}

.blog-hero-eyebrow {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.blog-hero-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.blog-hero-desc {
  margin: 0;
  max-width: 640px;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

/* ===== 标签筛选 ===== */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding-top: 0.5rem;
  padding-bottom: 1.75rem;
}

.tag-filter-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 0.86rem;
  line-height: 1;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.tag-filter-btn:hover {
  color: var(--text);
  border-color: var(--muted);
}

.tag-filter-btn.is-on {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--bg-panel2);
}

/* ===== 文章列表 ===== */
.blog-list-section {
  padding-bottom: 4rem;
}

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

@media (max-width: 960px) {
  .post-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .post-grid {
    grid-template-columns: 1fr;
  }
}

.post-card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.1rem 1.15rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.post-card:hover {
  border-color: var(--muted);
  background: var(--bg-panel2);
}

.post-meta {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
}

.tag-chip {
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--link);
  font-family: var(--font-body);
  font-size: 0.75rem;
  line-height: 1.4;
}

.post-title {
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.45;
}

.post-sum {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-empty {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 1.5rem 0;
}

/* ===== 面包屑(文章页) ===== */
.crumbs {
  margin-top: 1.5rem;
  padding-top: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  font-size: 0.84rem;
  color: var(--muted);
}

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

.crumbs a:hover {
  text-decoration: underline;
}

.crumbs .sep {
  color: var(--border);
}

.crumbs .cur {
  color: var(--text);
}

/* ===== 文章 Hero ===== */
.post-hero {
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.post-hero-meta {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.read-time {
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
}

.post-hero-title {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
}

.post-hero-sum {
  margin: 0;
  max-width: 720px;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.75;
}

/* ===== 文末下载引导卡 ===== */
.dl-guide {
  margin-top: 3rem;
  padding: 1.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.dl-guide-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}

.dl-guide p {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.dl-guide .cta-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 0;
}

/* ===== 延伸阅读 ===== */
#related-posts {
  margin-top: 3rem;
}

.related-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

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

@media (max-width: 960px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== 上一篇 / 下一篇 ===== */
#post-nav {
  margin-top: 1.75rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 640px) {
  #post-nav {
    grid-template-columns: 1fr;
  }
}

.post-nav-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1rem 1.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.post-nav-item:hover {
  border-color: var(--muted);
  background: var(--bg-panel2);
}

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

.post-nav-dir {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent);
}

.post-nav-title {
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.5;
}

/* ===== 右下角常驻下载浮层(文章页专用) ===== */
.dl-fab {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1rem;
  background: var(--accent);
  color: var(--bg);
  border: 1px solid var(--accent-dark);
  border-radius: var(--radius);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
}

.dl-fab:hover {
  background: var(--accent-dark);
}

.dl-fab .icon {
  width: 16px;
  height: 16px;
}