/* ============================================================
   show.css — 文章详情页专属样式
   依赖 common.css 提供 CSS 变量、reset、topnav、sidebar、footer
   ============================================================ */

/* ============================================================
   Page Layout
   ============================================================ */
main {
  padding-top: 6rem;
  padding-bottom: 6rem;
  max-width: 80rem;
  margin: 0 auto;
  padding-left: 2rem;
  padding-right: 2rem;
}
@media (min-width: 1024px) {
  main { padding-top: 8rem; }
}

/* ============================================================
   Breadcrumbs
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  margin-bottom: 3rem;
  overflow-x: auto;
  white-space: nowrap;
}
.breadcrumb a {
  color: var(--on-surface-variant);
  transition: color 0.2s;
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .material-symbols-outlined { font-size: 0.875rem; opacity: 0.6; }
.breadcrumb .current { color: var(--primary); font-weight: 500; }

/* ============================================================
   Article Header
   ============================================================ */
.article-header {
  max-width: 56rem;
  margin-bottom: 2rem;
}
.article-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  background: rgba(197,160,89,0.1);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}
.article-badge .material-symbols-outlined { font-size: 0.875rem; }
.article-title {
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: clamp(1.75rem, 5vw, 3.75rem);
  color: var(--on-surface);
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 2rem;
}
.article-byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  border-left: 2px solid var(--primary);
  padding-left: 1.5rem;
  color: var(--on-surface-variant);
}
.article-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.article-author-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  background: rgba(197,160,89,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.article-author-avatar .material-symbols-outlined { color: var(--primary); font-size: 1.25rem; }
.article-author-name { font-size: 0.875rem; font-weight: 700; color: var(--on-surface); }
.article-author-date { font-size: 0.75rem; }
.article-divider {
  height: 2rem;
  width: 1px;
  background: rgba(209,197,180,0.3);
}
.article-stat {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
}
.article-stat .material-symbols-outlined { font-size: 0.875rem; }

/* ============================================================
   Main Layout: article + sidebar
   ============================================================ */
.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
}
@media (min-width: 1024px) {
  .article-layout { grid-template-columns: 1fr minmax(0, 22rem); }
}

/* ============================================================
   Article Body
   ============================================================ */
.article-cover {
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 16/9;
  margin-bottom: 2.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.article-cover img { width: 100%; height: 100%; object-fit: cover; }

.article-content {
  color: var(--on-surface);
  font-size: 1.0625rem;
  line-height: 1.75;
}

/* 2. 核心代码：只针对文章里被设置了居中的图片 */
.article-content p[style*="text-align: center"] img,
.article-content div[style*="text-align: center"] img {
    display: block !important;  /* 强制变成块级元素 */
    margin: 15px auto !important; /* 左右自动外边距实现居中 */
    max-width: 100%;            /* 保证图片不超出手机屏幕 */
    height: auto;
}

.article-content p { margin-bottom: 1.5rem; }
.article-content h2 {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: clamp(1.25rem, 3vw, 1.875rem);
  color: var(--primary);
  margin-top: 3rem;
  margin-bottom: 1.5rem;
}
.article-content blockquote {
  background: var(--surface-container);
  padding: 1.5rem 2rem;
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  margin: 2rem 0;
}
.article-content blockquote .quote-icon {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
  display: block;
}
.article-content blockquote p {
  font-size: 1rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  position: relative;
  z-index: 1;
  margin-bottom: 0;
}
.article-content blockquote .quote-bg {
  position: absolute;
  right: -1rem;
  bottom: -1rem;
  color: var(--primary);
  opacity: 0.1;
}
.article-content blockquote .quote-bg .material-symbols-outlined {
  font-size: 8rem;
}
.article-lead {
  font-size: 1.125rem;
  font-style: italic;
  font-weight: 500;
  color: var(--on-surface-variant);
  border-left: 4px solid var(--primary);
  padding-left: 1.5rem;
  margin-bottom: 2rem;
}

/* Inline image grid */
.article-img-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 3rem 0;
}
.article-img-grid > div {
  border-radius: var(--radius-xl);
  overflow: hidden;
  height: 12rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
@media (min-width: 640px) {
  .article-img-grid > div { height: 16rem; }
}
.article-img-grid img { width: 100%; height: 100%; object-fit: cover; }

/* Interaction bar */
.article-actions {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2.5rem 0;
  border-top: 1px solid rgba(209,197,180,0.2);
  margin-top: 4rem;
}
@media (min-width: 640px) {
  .article-actions {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}
.article-action-btns {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.article-action-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #78716c;
  font-size: 0.9375rem;
  transition: color 0.2s;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}
.article-action-btn:hover { color: var(--primary); }
.article-share {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.article-share-label { font-size: 0.875rem; color: var(--on-surface-variant); }
.article-share-btns { display: flex; gap: 0.75rem; }
.share-btn {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-full);
  background: var(--surface-container);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.share-btn:hover { background: rgba(197,160,89,0.2); }
.share-btn .material-symbols-outlined { font-size: 0.875rem; color: #78716c; }
.share-btn:hover .material-symbols-outlined { color: var(--primary); }

/* ============================================================
   Sidebar
   ============================================================ */
.article-sidebar { display: flex; flex-direction: column; gap: 3rem; }

.sidebar-card {
  background: var(--surface-container);
  padding: 2rem;
  border-radius: var(--radius-xl);
}
.sidebar-card h3 {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--on-surface);
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(209,197,180,0.3);
}
.sidebar-card p {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  line-height: 1.65;
  margin-bottom: 1.5rem;
}
.sidebar-detail-btn {
  width: 100%;
  background: rgba(197,160,89,0.1);
  color: var(--primary);
  border: 1px solid rgba(197,160,89,0.3);
  padding: 0.75rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.9375rem;
  transition: background 0.2s;
  font-family: inherit;
  cursor: pointer;
}
.sidebar-detail-btn:hover { background: rgba(197,160,89,0.2); }

/* Tags */
.sidebar-tags-title {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--on-surface);
  margin-bottom: 1.5rem;
}
.sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.sidebar-tag {
  padding: 0.5rem 1rem;
  background: var(--surface-container-high);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  color: var(--on-surface-variant);
}
.sidebar-tag:hover { background: var(--primary); color: var(--on-primary); }

/* CTA Banner */
.sidebar-cta {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  height: 20rem;
  cursor: pointer;
}
.sidebar-cta img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.sidebar-cta:hover img { transform: scale(1.08); }
.sidebar-cta-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(197,160,89,0.9), transparent);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem;
}
.sidebar-cta-title {
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 1rem;
  line-height: 1.4;
}
.sidebar-cta-btn {
  background: #fff;
  color: var(--primary);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.9375rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: background 0.2s;
  border: none;
  cursor: pointer;
  font-family: inherit;
}
.sidebar-cta-btn:hover { background: var(--surface); }
.sidebar-cta-btn .material-symbols-outlined { font-size: 0.9375rem; }

/* ============================================================
   Related Articles Section
   ============================================================ */
.related-section { margin-top: 8rem; }
.related-header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 3rem;
}
@media (min-width: 640px) {
  .related-header {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
}
.related-label {
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.15em;
  font-size: 0.875rem;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.related-title {
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  color: var(--on-surface);
}
.related-all-link {
  color: var(--primary);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  white-space: nowrap;
  transition: text-decoration 0.2s;
}
.related-all-link:hover { text-decoration: underline 2px; text-underline-offset: 0.5rem; }
.related-all-link .material-symbols-outlined { font-size: 1.25rem; }

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) {
  .related-grid { grid-template-columns: 1fr 1fr 1fr; }
}
.related-card { cursor: pointer; }
.related-card-img-wrap {
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 16/9;
  position: relative;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.related-card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.related-card:hover .related-card-img-wrap img { transform: scale(1.05); }
.related-card-img-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(4px);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.625rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.related-card-title {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--on-surface);
  margin-bottom: 0.75rem;
  line-height: 1.4;
  transition: color 0.2s;
}
.related-card:hover .related-card-title { color: var(--primary); }
.related-card-excerpt {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  line-height: 1.65;
  /* 2-line clamp */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}