.blog-hero-sec {
  padding-bottom: 0;
}

.blog-hero {
  max-width: 720px;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.blog-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.7rem);
  color: var(--text);
  margin: 0;
}

.blog-hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin: 0;
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.tag-btn {
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.92rem;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.tag-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

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

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.4rem;
}

.post-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  background: var(--bg-panel);
  border-radius: var(--radius-xl);
  padding: 1.6rem;
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card), 0 18px 34px -22px rgba(199, 67, 40, 0.35);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 0.85rem;
}

.post-date {
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.post-tag {
  background: var(--bg-panel2);
  color: var(--accent-dark);
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.7rem;
  font-size: 0.8rem;
}

.post-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.5;
  margin: 0;
  color: var(--text);
}

.post-sum {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
  flex: 1;
}

.post-more {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
}

/* 面包屑 */
.crumbs-wrap {
  margin-top: 1.4rem;
  padding-top: 0.2rem;
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

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

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

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

/* 文章 Hero */
.article-hero {
  max-width: 760px;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-top: 1.2rem;
}

.article-hero .post-meta {
  font-size: 0.9rem;
}

.article-hero .read-time {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.article-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.5rem);
  line-height: 1.4;
  color: var(--text);
  margin: 0;
}

.article-summary {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.75;
  margin: 0;
}

/* 文末下载引导卡 */
.dl-guide {
  background: var(--bg-panel2);
  border-radius: var(--radius-xl);
  padding: 2.2rem clamp(1.4rem, 4vw, 2.6rem);
  box-shadow: var(--shadow-card);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}

.dl-guide h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--text);
  margin: 0;
}

.dl-guide p {
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.7;
  margin: 0;
}

.dl-guide-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  justify-content: center;
  margin-top: 0.4rem;
}

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

.related-heading {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--text);
  margin: 0 0 1.2rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.1rem;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  background: var(--bg-panel);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s ease;
}

.related-card:hover {
  transform: translateY(-2px);
}

.related-title {
  font-size: 1rem;
  line-height: 1.5;
  margin: 0;
  color: var(--text);
}

/* 上一篇/下一篇 */
#post-nav {
  margin-top: 2.2rem;
}

.post-nav-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: var(--bg-panel);
  border-radius: var(--radius-lg);
  padding: 1.2rem 1.4rem;
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s ease;
}

.post-nav-card:hover {
  transform: translateY(-2px);
}

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

.post-nav-dir {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

.post-nav-title {
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--text);
}

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

  .post-nav-next {
    grid-column: 1;
    text-align: left;
  }
}

/* 右下角常驻下载浮层(文章页专属) */
.dl-fab {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 1.3rem;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-btn);
  z-index: 40;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.dl-fab:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn-hover);
}

.dl-fab svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}