/* wenxin-page-index.css - 首页样式：文章列表、年份分组、卡片 */
/* Stagger delays reference shared variables from variables.css */
.post-item:nth-child(1) { animation-delay: var(--stagger-1); }
.post-item:nth-child(2) { animation-delay: var(--stagger-2); }
.post-item:nth-child(3) { animation-delay: var(--stagger-3); }
.post-item:nth-child(4) { animation-delay: var(--stagger-4); }
.post-item:nth-child(5) { animation-delay: var(--stagger-5); }
.post-item:nth-child(6) { animation-delay: var(--stagger-6); }
.post-item:nth-child(7) { animation-delay: var(--stagger-7); }
.post-item:nth-child(8) { animation-delay: var(--stagger-8); }

.content-stream {
  display: flex;
  flex-direction: column;
  gap: var(--space-24);
  padding-top: var(--space-2);
}

.year-group {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: var(--space-6);
  position: relative;
}

.year-label {
  font-family: var(--font-ui);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text-muted);
  position: sticky;
  top: var(--space-32);
  height: fit-content;
  text-align: right;
  padding-right: var(--space-4);
  padding-top: var(--space-6);
  letter-spacing: var(--tracking-wide);
}

.post-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--color-border-subtle);
  margin-left: 0;
}

.post-item {
  display: block;
  padding: var(--space-6) 0 var(--space-6) var(--space-10);
  position: relative;
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUpStagger 0.5s var(--ease-out) forwards;
}

.post-item::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 32px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-border-strong);
  transition: background-color var(--duration-fast);
}

.post-item:hover::before {
  background-color: var(--color-accent);
}

.post-link { display: block; }

.post-meta {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  display: block;
  letter-spacing: var(--tracking-wide);
  font-variant-numeric: tabular-nums;
}

.post-title {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
  transition: color var(--duration-fast);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-link:hover .post-title {
  color: var(--color-accent);
}

/* Year label sticky-top must track the layout's padding-top */
@media (max-width: 1024px) and (min-width: 861px) {
  .year-label { top: var(--space-16); }
}
@media (max-width: 860px) and (min-width: 640px) {
  .year-label { top: var(--space-12); }
}

@media (max-width: 639px) {
  .year-group {
    display: block;
  }

  .year-label {
    position: static;
    text-align: left;
    font-size: var(--text-sm);
    padding: 0;
    padding-top: var(--space-2);
    margin-bottom: var(--space-3);
  }

  .post-item {
    padding: var(--space-4) 0 var(--space-4) var(--space-12);
  }

  .post-link {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
  }
  .post-meta {
    order: 0;
    margin-bottom: 0;
    font-size: var(--text-xs);
  }

  .content-stream {
    gap: var(--space-8);
  }
}

.content-stream .pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-24);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-subtle);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
}

.content-stream .pagination-link {
  color: var(--color-text-secondary);
  transition: color var(--duration-fast);
  text-decoration: none;
}

.content-stream .pagination-link:hover {
  color: var(--color-accent);
}

.content-stream .pagination-prev {
  margin-right: auto;
}

.content-stream .pagination-next {
  margin-left: auto;
}

.content-stream .pagination-pages {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.content-stream .pagination-number {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast);
  min-width: 2ch;
  text-align: center;
}

.content-stream .pagination-number:hover {
  color: var(--color-accent);
}

.content-stream .pagination-current {
  color: var(--color-accent);
  font-weight: 500;
}

@media (max-width: 639px) {
  .content-stream .pagination {
    margin-top: var(--space-12);
    font-size: var(--text-xs);
  }
}