.page-news {
  --tl-line-color: var(--color-gold, #C9A96E);
  --tl-dot-size: 18px;
  --tl-line-width: 3px;
  --archive-card-min-h: 280px;
  --obs-card-min-h: 340px;
  background-color: var(--color-cream, #FDF8F0);
  color: var(--color-dark-brown, #2C1E13);
  font-family: var(--font-body, "Noto Serif SC", serif);
  line-height: 1.6;
  padding-bottom: var(--space-2xl, 5rem);
}

/* ── 面包屑 ── */
.page-news .breadcrumb-wrap {
  padding-top: var(--space-lg, 2rem);
  padding-bottom: 0;
}
.page-news .breadcrumb {
  font-family: var(--font-mono, monospace);
  font-size: 0.85rem;
  color: var(--color-silver, #A0A8B0);
  letter-spacing: 0.04em;
}
.page-news .breadcrumb a {
  color: var(--color-deep-blue, #1A2D4A);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s ease);
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  color: var(--color-gold, #C9A96E);
}
.page-news .breadcrumb .sep {
  margin: 0 0.6em;
  color: var(--color-silver, #A0A8B0);
}
.page-news .breadcrumb [aria-current="page"] {
  color: var(--color-dark-brown, #2C1E13);
  font-weight: 600;
}

/* ── 页面标题区 ── */
.page-news .page-header {
  padding-top: var(--space-xl, 3rem);
  padding-bottom: var(--space-2xl, 5rem);
  border-bottom: var(--border-thick, 6px) solid var(--color-dark-brown, #2C1E13);
  margin-bottom: var(--space-2xl, 5rem);
  position: relative;
}
.page-news .page-header .section-number {
  display: block;
  font-family: var(--font-mono, monospace);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-red, #E84C22);
  line-height: 1;
  margin-bottom: var(--space-sm, 0.5rem);
}
.page-news .page-title {
  font-family: var(--font-header, "Noto Sans SC", sans-serif);
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--color-dark-brown, #2C1E13);
  margin: 0 0 var(--space-xs, 0.25rem);
  letter-spacing: 0.02em;
  line-height: 1.15;
}
.page-news .page-desc {
  font-size: 1.15rem;
  color: var(--color-silver, #A0A8B0);
  font-family: var(--font-body, serif);
  margin: 0;
  letter-spacing: 0.03em;
}

/* ── 时间线容器 ── */
.page-news .timeline {
  position: relative;
  padding-left: 0;
  margin-bottom: var(--space-2xl, 5rem);
}
/* 金色虚线贯穿整条时间线 */
.page-news .timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 28px;
  width: var(--tl-line-width);
  background: repeating-linear-gradient(
    to bottom,
    var(--tl-line-color) 0,
    var(--tl-line-color) 8px,
    transparent 8px,
    transparent 16px
  );
  opacity: 0.45;
  z-index: 0;
}

/* ── 章节头部 ── */
.page-news .tl-chapter {
  position: relative;
  z-index: 1;
  margin-bottom: var(--space-2xl, 5rem);
}
.page-news .tl-chapter:last-of-type {
  margin-bottom: 0;
}
.page-news .tl-chapter-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-sm, 0.5rem) var(--space-md, 1rem);
  padding: var(--space-lg, 2rem) 0 var(--space-lg, 2rem) 68px;
  border-bottom: 2px solid var(--color-gold, #C9A96E);
  margin-bottom: var(--space-xl, 3rem);
}
.page-news .tl-chapter-num {
  font-family: var(--font-mono, monospace);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-red, #E84C22);
  line-height: 1;
}
.page-news .tl-chapter-title {
  font-family: var(--font-header, sans-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-dark-brown, #2C1E13);
  margin: 0;
  letter-spacing: 0.02em;
}
.page-news .tl-chapter-label {
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-deep-blue, #1A2D4A);
  background: var(--color-gold, #C9A96E);
  padding: 0.2em 0.9em;
  border-radius: 2px;
  font-weight: 600;
}

/* ── 时间线条目 ── */
.page-news .tl-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl, 3rem);
}
.page-news .tl-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-md, 1rem);
  padding-left: 56px;
}
/* 时间线节点圆点 */
.page-news .tl-item::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 18px;
  width: var(--tl-dot-size);
  height: var(--tl-dot-size);
  border-radius: 50%;
  background: var(--color-cream, #FDF8F0);
  border: 4px solid var(--tl-line-color);
  box-shadow: 0 0 0 3px var(--color-cream, #FDF8F0);
  z-index: 2;
  transition: background var(--transition-fast, 0.2s ease),
              border-color var(--transition-fast, 0.2s ease),
              transform var(--transition-fast, 0.2s ease);
}
.page-news .tl-item:hover::before {
  background: var(--color-gold, #C9A96E);
  border-color: var(--color-dark-brown, #2C1E13);
  transform: scale(1.12);
}

/* ── 左侧标记区 ── */
.page-news .tl-marker {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm, 0.5rem);
  margin-bottom: var(--space-xs, 0.25rem);
  transition: background var(--transition-fast, 0.2s ease);
  padding: 0.3em 0.6em;
  border-radius: 4px;
}
.page-news .tl-item:hover .tl-marker {
  background: rgba(201, 169, 110, 0.15);
}
.page-news .tl-item-num {
  font-family: var(--font-mono, monospace);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-red, #E84C22);
  line-height: 1;
  min-width: 2.2rem;
}
.page-news .tl-item-cat {
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-deep-blue, #1A2D4A);
  background: var(--color-gold, #C9A96E);
  padding: 0.15em 0.7em;
  border-radius: 2px;
  font-weight: 600;
  line-height: 1.4;
}

/* ── 卡片 ── */
.page-news .tl-card {
  background: var(--color-cream, #FDF8F0);
  border: var(--border-thick, 6px) solid var(--color-dark-brown, #2C1E13);
  box-shadow: var(--shadow-heavy, 8px 8px 0 rgba(44,30,19,0.15));
  padding: 0;
  overflow: hidden;
  transition: box-shadow var(--transition-fast, 0.2s ease),
              transform var(--transition-fast, 0.2s ease);
}
.page-news .tl-card:hover {
  box-shadow: 12px 12px 0 rgba(44, 30, 19, 0.22);
  transform: translate(-2px, -2px);
}
.page-news .tl-card img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-bottom: 3px solid var(--color-dark-brown, #2C1E13);
}
.page-news .card-body {
  padding: var(--space-lg, 2rem);
}
.page-news .card-title {
  font-family: var(--font-header, sans-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark-brown, #2C1E13);
  margin: 0 0 var(--space-xs, 0.25rem);
  line-height: 1.3;
}
.page-news .card-time {
  display: inline-block;
  font-family: var(--font-mono, monospace);
  font-size: 0.9rem;
  color: var(--color-red, #E84C22);
  margin-bottom: var(--space-sm, 0.5rem);
  font-weight: 600;
  letter-spacing: 0.02em;
}
.page-news .card-summary {
  font-size: 1rem;
  color: var(--color-dark-brown, #2C1E13);
  margin: 0 0 var(--space-md, 1rem);
  line-height: 1.6;
}

/* ── 展开详情 (details/summary) ── */
.page-news .expand-detail {
  margin-top: var(--space-sm, 0.5rem);
  font-size: 0.95rem;
}
.page-news .expand-detail summary {
  cursor: pointer;
  font-family: var(--font-mono, monospace);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-deep-blue, #1A2D4A);
  padding: 0.4em 0.8em;
  border: 2px solid var(--color-deep-blue, #1A2D4A);
  display: inline-block;
  transition: background var(--transition-fast, 0.2s ease),
              color var(--transition-fast, 0.2s ease);
  list-style: none;
  user-select: none;
}
.page-news .expand-detail summary::-webkit-details-marker {
  display: none;
}
.page-news .expand-detail summary::marker {
  content: "";
}
.page-news .expand-detail summary::before {
  content: "[+] ";
  font-weight: 700;
  color: var(--color-red, #E84C22);
  transition: content var(--transition-fast, 0.2s ease);
}
.page-news .expand-detail[open] summary::before {
  content: "[–] ";
}
.page-news .expand-detail summary:hover,
.page-news .expand-detail summary:focus-visible {
  background: var(--color-deep-blue, #1A2D4A);
  color: var(--color-cream, #FDF8F0);
}
.page-news .expand-detail summary:hover::before,
.page-news .expand-detail summary:focus-visible::before {
  color: var(--color-gold, #C9A96E);
}
.page-news .expand-content {
  padding: var(--space-md, 1rem) 0 0;
  border-top: 1px dashed var(--color-silver, #A0A8B0);
  margin-top: var(--space-sm, 0.5rem);
}
.page-news .expand-content p {
  margin: 0 0 var(--space-sm, 0.5rem);
  line-height: 1.6;
  color: var(--color-dark-brown, #2C1E13);
}

/* ── 行业观察卡片特殊高度 ── */
.page-news .card-obs {
  min-height: var(--obs-card-min-h);
}

/* ── 归档区域 ── */
.page-news .archive-section {
  margin-top: var(--space-2xl, 5rem);
  padding-top: var(--space-2xl, 5rem);
  border-top: var(--border-thick, 6px) solid var(--color-dark-brown, #2C1E13);
}
.page-news .archive-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-md, 1rem);
  margin-bottom: var(--space-xl, 3rem);
}
.page-news .archive-head .section-number {
  font-family: var(--font-mono, monospace);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-red, #E84C22);
  line-height: 1;
}
.page-news .archive-title {
  font-family: var(--font-header, sans-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-dark-brown, #2C1E13);
  margin: 0;
}
.page-news .archive-desc {
  font-size: 1rem;
  color: var(--color-silver, #A0A8B0);
  margin: 0;
  width: 100%;
}

/* ── 归档网格 ── */
.page-news .archive-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl, 3rem);
}
.page-news .archive-card {
  background: var(--color-cream, #FDF8F0);
  border: var(--border-thick, 6px) solid var(--color-dark-brown, #2C1E13);
  box-shadow: var(--shadow-heavy, 8px 8px 0 rgba(44,30,19,0.15));
  padding: 0;
  overflow: hidden;
  transition: box-shadow var(--transition-fast, 0.2s ease),
              transform var(--transition-fast, 0.2s ease);
  min-height: var(--archive-card-min-h);
}
.page-news .archive-card:hover {
  box-shadow: 12px 12px 0 rgba(44, 30, 19, 0.22);
  transform: translate(-2px, -2px);
}
.page-news .archive-card img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-bottom: 3px solid var(--color-dark-brown, #2C1E13);
}
.page-news .archive-cat-title {
  font-family: var(--font-header, sans-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-deep-blue, #1A2D4A);
  margin: 0 0 var(--space-md, 1rem);
  padding-bottom: var(--space-sm, 0.5rem);
  border-bottom: 2px solid var(--color-gold, #C9A96E);
}
.page-news .archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 0.5rem);
}
.page-news .archive-list li {
  margin: 0;
  padding: 0;
}
.page-news .archive-link {
  position: relative;
  display: inline-block;
  font-family: var(--font-body, serif);
  font-size: 1rem;
  color: var(--color-dark-brown, #2C1E13);
  text-decoration: none;
  padding: 0.3em 0 0.3em 1.2em;
  transition: color var(--transition-fast, 0.2s ease),
              padding-left var(--transition-fast, 0.2s ease);
  border-left: 3px solid transparent;
}
.page-news .archive-link::before {
  content: "▹";
  position: absolute;
  left: 0;
  top: 0.3em;
  color: var(--color-red, #E84C22);
  font-size: 1rem;
  transition: left var(--transition-fast, 0.2s ease);
}
.page-news .archive-link:hover,
.page-news .archive-link:focus-visible {
  color: var(--color-deep-blue, #1A2D4A);
  padding-left: 1.6em;
  border-left-color: var(--color-gold, #C9A96E);
}
.page-news .archive-link:hover::before,
.page-news .archive-link:focus-visible::before {
  left: 0.2em;
  color: var(--color-gold, #C9A96E);
}
/* 悬停预览提示 (通过 data-preview) */
.page-news .archive-link::after {
  content: attr(data-preview);
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  background: var(--color-deep-blue, #1A2D4A);
  color: var(--color-cream, #FDF8F0);
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  padding: 0.3em 0.8em;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast, 0.2s ease),
              transform var(--transition-fast, 0.2s ease);
  z-index: 10;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}
.page-news .archive-link:hover::after,
.page-news .archive-link:focus-visible::after {
  opacity: 1;
  transform: translateY(0);
}

/* ── 通用容器 ── */
.page-news .container {
  max-width: var(--max-width, 1200px);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md, 1rem);
  padding-right: var(--space-md, 1rem);
}

/* ── 桌面断点 ≥768px ── */
@media (min-width: 768px) {
  .page-news .container {
    padding-left: var(--space-xl, 3rem);
    padding-right: var(--space-xl, 3rem);
  }

  /* 时间线虚线左移 */
  .page-news .timeline::before {
    left: 68px;
  }

  /* 条目改为行布局 */
  .page-news .tl-item {
    flex-direction: row;
    padding-left: 96px;
    gap: var(--space-xl, 3rem);
  }
  .page-news .tl-item::before {
    left: 56px;
    top: 28px;
    width: 22px;
    height: 22px;
  }

  /* 左侧标记区固定宽度 */
  .page-news .tl-marker {
    flex: 0 0 140px;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs, 0.25rem);
    padding-top: 0.6rem;
  }
  .page-news .tl-item-num {
    font-size: 2rem;
    min-width: auto;
  }
  .page-news .tl-item-cat {
    font-size: 0.7rem;
  }

  /* 卡片占剩余空间 */
  .page-news .tl-card {
    flex: 1;
    min-width: 0;
  }

  /* 章节头部左移对齐 */
  .page-news .tl-chapter-head {
    padding-left: 96px;
  }
  .page-news .tl-chapter-num {
    font-size: 2.8rem;
  }
  .page-news .tl-chapter-title {
    font-size: 1.8rem;
  }

  /* 页面标题字号加大 */
  .page-news .page-title {
    font-size: 3.6rem;
  }
  .page-news .page-header .section-number {
    font-size: 4rem;
  }

  /* 归档三列网格 */
  .page-news .archive-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* 归档卡片内图片更紧凑 */
  .page-news .archive-card img {
    height: 160px;
    object-fit: cover;
  }
}

/* ── 桌面中大型 ≥1024px ── */
@media (min-width: 1024px) {
  .page-news .tl-item {
    padding-left: 120px;
    gap: var(--space-2xl, 5rem);
  }
  .page-news .tl-marker {
    flex: 0 0 180px;
  }
  .page-news .tl-item-num {
    font-size: 2.4rem;
  }
  .page-news .tl-chapter-head {
    padding-left: 120px;
  }
  .page-news .timeline::before {
    left: 82px;
  }
  .page-news .tl-item::before {
    left: 70px;
  }
  .page-news .page-title {
    font-size: 4.2rem;
  }
}