/* ============================================
   Financial Knowledge Encyclopedia - Page Specific Styles
   ============================================ */

/* ============================================
   Breadcrumb Navigation
   ============================================ */

.breadcrumb-nav {
  margin-bottom: 0;
  padding: 0;
}

.breadcrumb-item a {
  color: var(--color-text-secondary);
}

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

.breadcrumb-item.active {
  color: var(--color-text-primary);
}

.breadcrumb-separator {
  color: var(--color-text-muted);
}

/* ============================================
   Category Navigation
   ============================================ */

.category-nav {
  background: var(--color-surface);
  border-radius: var(--border-radius-md);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-4);
  position: relative;
  overflow: hidden;
}

.category-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.category-nav-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.category-nav-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--color-accent);
  border-radius: var(--border-radius-sm);
}

.category-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.category-list-more {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px dashed var(--color-border);
  display: none;
}

.category-list-more.show {
  display: flex;
}

.category-list-mobile {
  display: none;
}

.category-item {
  margin: 0;
  padding: 0;
}

.category-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  background: var(--color-bg);
  border: none;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
  min-height: var(--touch-target-min);
}

 .category-link:hover {
  color: var(--color-accent-hover);
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  transform: translateY(-2px);
}

.category-more {
  color: var(--color-text-muted);
  border-style: dashed;
}

.category-more:hover {
  color: var(--color-accent-hover);
}

.more-arrow {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
  display: inline-block;
  vertical-align: middle;
}

.category-more[aria-expanded="true"] .more-arrow {
  transform: rotate(180deg);
}

/* ============================================
   Content Sections
   ============================================ */

.main-content {
  padding-bottom: var(--space-8);
}

.content-section {
  margin-bottom: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--border-radius-md);
  padding: var(--space-6);
  transition: box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.content-section:hover {
  box-shadow: var(--shadow-md);
}

.content-section:last-child {
  margin-bottom: 0;
}

/* Section Header */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.section-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--border-radius-xs);
}

.section-title-row {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex: 1;
  width: 0;
  min-width: 0;
  gap: var(--space-4);
  flex-wrap: nowrap;
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0;
  letter-spacing: -0.01em;
  line-height: 1.3;
  text-align: left;
  white-space: nowrap;
}

.section-tags {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0 0 0 auto;
  padding: 0;
}

/* .tag-link styles removed — unified in layout.css as .tag-meta */

.section-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  transition: color var(--transition-fast);
  white-space: nowrap;
  min-height: var(--touch-target-min);
}

.section-more:hover {
  color: var(--color-accent-hover);
}

.arrow {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.section-more:hover .arrow {
  transform: translateX(4px);
}

/* ============================================
   Article Grid & Cards
   ============================================ */

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.article-card {
  background: var(--color-surface);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: none;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  border: 1px solid var(--color-border);
  position: relative;
  box-sizing: border-box;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gradient-accent));
  transform: scaleX(0);
  transition: transform var(--transition-base);
  z-index: 3;
  border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
}

.article-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.article-card:hover::before {
  transform: scaleX(1);
}

.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.card-image {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg-placeholder-start) 0%, var(--color-bg-placeholder-end) 100%);
}

@supports not (aspect-ratio: 16 / 9) {
  .card-image {
    padding-top: 56.25%;
  }
}

.article-card:hover .card-image img {
  transform: scale(1.03);
}

/* Image Fallback */
.card-image-fallback {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-bg-placeholder-start) 0%, var(--color-bg-placeholder-end) 100%);
  z-index: 1;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card-image.no-image .card-image-fallback {
  opacity: 1;
}

.card-image.no-image {
  background: var(--color-bg-placeholder-end);
}

.card-image.no-image img {
  display: none;
}

.fallback-icon {
  width: 32px;
  height: 32px;
  margin-bottom: var(--space-2);
  opacity: 0.5;
  stroke: var(--color-text-muted);
}

.fallback-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card-content {
  padding: var(--space-4);
}

.card-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 42px;
  transition: color var(--transition-fast);
}

.article-card:hover .card-title {
  color: var(--color-accent-hover);
}

.card-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 400;
}

.card-date::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpolyline points='12 6 12 12 16 14'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  opacity: 0.6;
}

/* ============================================
   Responsive Design
   ============================================ */

@media screen and (max-width: 1024px) {
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .section-title {
    font-size: var(--font-size-lg);
  }

  .category-nav {
    padding: var(--space-4) var(--space-5);
  }

  .section-header {
    flex-direction: column;
    gap: var(--space-2);
  }

  .section-more {
    align-self: flex-end;
  }
}

@media screen and (max-width: 750px) {
  :root {
    --container-padding: 16px;
  }

  .content {
    margin: var(--space-4) auto var(--space-8);
  }

  .breadcrumb-nav {
    padding: 0;
    margin-bottom: 0;
    font-size: var(--font-size-xs);
  }

  .breadcrumb-list {
    font-size: var(--font-size-xs);
  }

  .breadcrumb-item a {
    min-height: var(--touch-target-min);
  }

  .category-nav {
    padding: var(--space-4);
    margin-bottom: var(--space-6);
  }

  .category-nav-header {
    margin-bottom: var(--space-3);
  }

  .category-list {
    gap: var(--space-2);
  }

  .category-link {
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    min-height: var(--touch-target-min);
  }

  .content-section {
    padding: var(--space-4);
    margin-bottom: var(--space-6);
  }

  .article-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .section-title-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-2) var(--space-3);
    width: 100%;
  }

  .section-title {
    font-size: var(--font-size-lg);
    margin: 0;
    line-height: 1.4;
    flex-shrink: 0;
  }

  .section-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    align-items: center;
    width: 100%;
    margin: var(--space-1) 0 0;
    padding: 0;
    order: 3;
  }

  .section-more {
    line-height: 1.4;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .card-title {
    min-height: auto;
    font-size: var(--font-size-base);
  }

  .category-list-pc {
    display: none;
  }

  .category-list-mobile {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
  }

  .category-list-mobile .category-item {
    flex: 1 1 auto;
    min-width: 80px;
    max-width: 50%;
  }

  .category-list-mobile .category-link {
    width: 100%;
    justify-content: center;
    text-align: center;
    white-space: nowrap;
  }

  /* Mobile Article Collapse */
  .article-collapsed {
    display: none;
  }

  .article-grid.expanded .article-collapsed {
    display: block;
    animation: fadeInUp 0.3s ease;
  }

  .article-expand-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-3);
    margin-top: var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    min-height: var(--touch-target-min);
    transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
  }

  .article-expand-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent-hover);
    background: var(--color-accent-light);
  }

  .article-expand-btn .expand-icon {
    width: 12px;
    height: 12px;
    transition: transform var(--transition-fast);
    display: inline-block;
  }

  .article-expand-btn.expanded .expand-icon {
    transform: rotate(180deg);
  }

  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

}

/* Hide expand button on desktop */
@media screen and (min-width: 751px) {
  .article-expand-btn {
    display: none;
  }
}

/* ================================================================
   Friendship Links - 友情链接
   ================================================================ */

.friendship-links {
  padding: var(--space-12) 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.friendship-inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.friendship-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.friendship-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
}

.friendship-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--color-border), transparent);
}

.friendship-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
}

.friendship-link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  border: 1px solid transparent;
  min-height: var(--touch-target-min);
}

.friendship-link:hover {
  background: var(--color-surface);
  color: var(--color-accent-hover);
  border-color: var(--color-accent-light);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

@media screen and (max-width: 750px) {
  .friendship-links {
    padding: var(--space-8) 0;
  }

  .friendship-inner {
    padding: 0 var(--space-4);
  }

  .friendship-title {
    font-size: var(--font-size-md);
  }

  .friendship-grid {
    gap: var(--space-2) var(--space-3);
  }

  .friendship-link {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
  }

  .card-date {
    font-size: var(--font-size-sm);
  }
}

/* ============================================
   Touch Device Hover Reset
   ============================================ */

@media (hover: none) {
  .article-card:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
  }

  .article-card:hover .card-image img {
    transform: none;
  }

  .article-card:hover .card-title {
    color: var(--color-text-primary);
  }

  .article-card:hover::before {
    transform: scaleX(0);
  }

  .category-link:hover {
    color: var(--color-text-secondary);
    border-color: var(--color-border);
    background: transparent;
  }

  .category-more:hover {
    color: var(--color-text-muted);
  }

  .section-more:hover {
    color: var(--color-text-secondary);
  }

  .section-more:hover .arrow {
    transform: none;
  }

  .article-expand-btn:hover {
    border-color: var(--color-border);
    color: var(--color-text-secondary);
    background: var(--color-surface);
  }

  .friendship-link:hover {
    background: var(--color-bg);
    color: var(--color-text-secondary);
    border-color: transparent;
    box-shadow: var(--shadow-none);
    transform: none;
  }

  .breadcrumb-item a:hover {
    color: var(--color-text-secondary);
  }

  .content-section:hover {
    box-shadow: var(--shadow-sm);
  }
}

/* ============ RTL Overrides ============ */
[dir="rtl"] .section-header::after {
  left: auto;
  right: 0;
}

[dir="rtl"] .section-title {
  text-align: right;
}

[dir="rtl"] .article-card::before {
  background: linear-gradient(270deg, var(--color-accent), var(--color-gradient-accent));
}

[dir="rtl"] .card-image img {
  left: auto;
  right: 0;
}

[dir="rtl"] .card-image-fallback {
  left: 0;
  right: 0;
}

[dir="rtl"] .friendship-line {
  background: linear-gradient(to left, var(--color-border), transparent);
}

@media (hover: none) {
  [dir="rtl"] .section-more:hover .arrow {
    transform: scaleX(-1);
  }
}