.page-news {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  --timeline-marker-width: 30px;
  --timeline-line-color: var(--color-primary);
}

.page-news .breadcrumb {
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
  color: var(--color-dark);
}
.page-news .breadcrumb a {
  color: var(--color-accent-purple);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-news .breadcrumb a:hover {
  color: var(--color-primary);
}
.page-news .breadcrumb .sep {
  margin: 0 var(--space-xs);
}

.page-news .page-header {
  margin-bottom: var(--space-2xl);
}
.page-news .page-header h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.1;
  color: var(--color-secondary);
  letter-spacing: 2px;
  margin: 0;
  text-transform: uppercase;
}
.page-news .page-header .page-desc {
  margin-top: var(--space-sm);
  color: var(--color-dark);
  font-size: 1.125rem;
  max-width: 700px;
}

/* 内容索引 */
.page-news .content-index {
  padding: var(--space-lg);
  margin-bottom: var(--space-2xl);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.page-news .content-index .section-number {
  font-size: 2rem;
  color: var(--color-primary);
  line-height: 1;
}
.page-news .content-index .section-title {
  margin: var(--space-sm) 0;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  letter-spacing: 1px;
}
.page-news .content-index .index-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
  padding: 0;
  margin: var(--space-md) 0 0;
}
.page-news .content-index .index-list a {
  color: var(--color-accent-purple);
  font-weight: var(--weight-bold);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
  padding-bottom: 2px;
}
.page-news .content-index .index-list a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* 时间轴容器 —— 网格布局 */
.page-news .timeline-container {
  display: grid;
  grid-template-columns: var(--timeline-marker-width) 1fr;
  gap: var(--space-2xl) var(--space-md);
  position: relative;
}

/* 时间轴竖线 —— 伪元素参与网格布局 */
.page-news .timeline-container::before {
  content: '';
  display: block;
  grid-column: 1;
  grid-row: 1 / -1;
  width: 2px;
  background: var(--timeline-line-color);
  justify-self: center;
  align-self: stretch;
  z-index: 0;
}

/* 时间轴项目 */
.page-news .timeline-item {
  display: contents;
}

.page-news .timeline-marker {
  grid-column: 1;
  grid-row: auto;
  justify-self: center;
  z-index: 1;
  padding-top: 4px;
  display: flex;
  justify-content: center;
}
.page-news .timeline-marker .dot {
  display: block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--timeline-line-color);
  border: 3px solid var(--color-secondary);
  box-shadow: 0 0 0 2px var(--color-white);
}

.page-news .timeline-content {
  grid-column: 2;
  padding: var(--space-lg);
  position: relative;
}

/* 移动端内容卡片默认占满，不交替 */
.page-news .timeline-content.glass-panel {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.3);
}

.page-news .timeline-content .section-number {
  font-size: 2.5rem;
  color: var(--color-primary);
  line-height: 1;
  display: block;
  margin-bottom: var(--space-xs);
}
.page-news .timeline-content .section-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  letter-spacing: 1px;
  margin: var(--space-sm) 0;
  color: var(--color-secondary);
}
.page-news .timeline-content .section-subtitle {
  color: var(--color-dark);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-md);
}
.page-news .timeline-content p {
  line-height: 1.7;
  margin-bottom: var(--space-md);
}
.page-news .timeline-content img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius-md);
  margin-bottom: var(--space-md);
}
.page-news .timeline-content .cover-img {
  border: 2px solid var(--color-primary);
}

/* 斜切边框装饰 */
.page-news .card-skew {
  position: relative;
  overflow: hidden;
}
.page-news .card-skew::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 0 40px 40px;
  border-color: transparent transparent var(--color-accent-purple) transparent;
  opacity: 0.6;
}

/* 数据徽章组 */
.page-news .badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}
.page-news .badge-group .data-badge {
  background: var(--color-accent-green);
  color: var(--color-secondary);
  font-family: var(--font-mono);
  padding: 0.25rem 0.75rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.85rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.5px;
}

/* GIF区域 */
.page-news .gif-section {
  margin: var(--space-md) 0;
  position: relative;
}
.page-news .gif-section .gif-img {
  border: 2px solid var(--color-accent-purple);
}
.page-news .gif-section .img-caption {
  display: inline-block;
  margin-top: var(--space-xs);
  font-size: 0.85rem;
  color: var(--color-accent-purple);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* 高亮文本 */
.page-news .highlight {
  color: var(--color-primary);
  font-weight: var(--weight-bold);
}

/* 桌面端优化 */
@media (min-width: 768px) {
  .page-news {
    padding: var(--space-xl) var(--space-lg);
  }

  .page-news .timeline-container {
    grid-template-columns: 1fr 40px 1fr;
    gap: var(--space-3xl) var(--space-lg);
  }

  .page-news .timeline-container::before {
    grid-column: 2;
  }

  .page-news .timeline-marker {
    grid-column: 2;
  }

  /* 奇数项目 — 卡片在左列 */
  .page-news .timeline-item:nth-child(odd) .timeline-content {
    grid-column: 1 / 3;
    margin-right: var(--space-md);
    text-align: left;
  }

  /* 偶数项目 — 卡片在右列 */
  .page-news .timeline-item:nth-child(even) .timeline-content {
    grid-column: 2 / 4;
    margin-left: var(--space-md);
    text-align: left;
  }

  /* 调整偶数项卡片的斜切方向 */
  .page-news .timeline-item:nth-child(even) .card-skew::after {
    border-width: 0 0 40px 40px;
    border-color: transparent transparent var(--color-accent-purple) transparent;
    right: 0;
    left: auto;
  }

  .page-news .timeline-content .section-number {
    font-size: 3rem;
  }

  .page-news .page-header h1 {
    font-size: 4rem;
  }
}

/* 小屏安全 */
@media (max-width: 400px) {
  .page-news .timeline-content {
    padding: var(--space-md);
  }
  .page-news .content-index {
    padding: var(--space-md);
  }
}