/* ===== 页面专属：最新动态 ===== */
.page-news {
  --color-primary: #E60012;
  --color-gold: #D4AF37;
  --color-black: #1A1A1A;
  --color-deep-teal: #0D3B4F;
  --color-wine: #7B241C;
  --color-indigo: #4B0082;
  --color-light-gray: #F2F2F2;
  --color-white: #FFFFFF;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-headline: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.35s ease;
  --max-width: 1200px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;

  display: block;
  background-color: var(--color-light-gray);
  color: var(--color-black);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---- 页面头部 ---- */
.news-lead {
  padding: var(--space-lg) var(--space-md) var(--space-md);
  background: linear-gradient(135deg, var(--color-black) 0%, #2a0a0a 100%);
  color: var(--color-white);
  border-bottom: 4px solid var(--color-gold);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: var(--space-md);
}

.breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--color-white);
  text-decoration: underline;
  outline: none;
}

.breadcrumb-sep {
  color: rgba(255, 255, 255, 0.35);
}

.news-headline {
  font-family: var(--font-headline);
  font-weight: 200;
  font-size: clamp(2rem, 6.5vw, 3.8rem);
  letter-spacing: 0.02em;
  margin: 0 0 var(--space-sm);
  line-height: 1.15;
  color: var(--color-white);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
}

.news-subline {
  font-weight: 300;
  font-size: clamp(0.95rem, 2.2vw, 1.2rem);
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0;
  letter-spacing: 0.02em;
  border-left: 3px solid var(--color-gold);
  padding-left: var(--space-md);
}

/* ---- 通用章节头 ---- */
.section-header {
  padding: var(--space-lg) var(--space-md) var(--space-sm);
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.section-title {
  font-family: var(--font-headline);
  font-weight: 200;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  color: var(--color-black);
  margin: 0 0 var(--space-xs);
  letter-spacing: 0.01em;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-gold);
  margin-top: var(--space-sm);
}

.section-desc {
  font-weight: 300;
  font-size: 0.95rem;
  color: #555;
  max-width: 560px;
  margin: var(--space-sm) 0 0;
  line-height: 1.7;
}

/* ---- 更新日志章节 ---- */
.section-updates {
  background: var(--color-white);
  padding-bottom: var(--space-xl);
  border-bottom: 2px solid rgba(212, 175, 55, 0.25);
}

/* 筛选标签 */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding: 0 0 var(--space-sm);
}

.filter-btn {
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.35rem 1rem;
  border-radius: 0;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 36px;
}

.filter-btn:hover,
.filter-btn:focus-visible {
  background: var(--color-gold);
  color: var(--color-black);
  outline: none;
}

.filter-btn.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

/* 图表图片 */
.updates-chart-wrap {
  max-width: var(--max-width);
  margin: var(--space-md) auto var(--space-lg);
  padding: 0 var(--space-md);
  box-sizing: border-box;
}

.chart-img {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  aspect-ratio: 800 / 400;
  object-fit: cover;
  border: 1px solid rgba(212, 175, 55, 0.3);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  background: var(--color-light-gray);
}

/* ---- 时间线 ---- */
.timeline {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  box-sizing: border-box;
}

/* 时间线竖线 */
.timeline::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-gold);
  opacity: 0.5;
}

.timeline-item {
  position: relative;
  padding: 0 0 var(--space-xl) 52px;
  display: flex;
  flex-direction: column;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

/* 时间节点圆点 */
.timeline-marker {
  position: absolute;
  left: 10px;
  top: 6px;
  z-index: 2;
  cursor: default;
}

.marker-dot {
  display: block;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-gold), 0 2px 8px rgba(0, 0, 0, 0.15);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.timeline-marker:hover .marker-dot,
.timeline-marker:focus-visible .marker-dot {
  transform: scale(1.25);
  box-shadow: 0 0 0 3px var(--color-primary), 0 2px 12px rgba(230, 0, 18, 0.35);
}

/* 时间线内容卡片 */
.timeline-content {
  background: var(--color-white);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  position: relative;
}

.timeline-content::before {
  content: '';
  position: absolute;
  top: -1px;
  right: -1px;
  bottom: -1px;
  left: -1px;
  border: 1px solid var(--color-gold);
  opacity: 0.15;
  pointer-events: none;
}

.timeline-content:hover {
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.08);
  border-color: var(--color-gold);
}

.tl-title {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
  margin: 0 0 var(--space-xs);
  letter-spacing: 0.01em;
}

.tl-desc {
  font-weight: 300;
  font-size: 0.9rem;
  color: #444;
  margin: 0 0 var(--space-sm);
  line-height: 1.7;
}

.tl-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.tl-tag {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--color-wine);
  color: var(--color-wine);
  background: rgba(123, 36, 28, 0.04);
}

/* 可展开详情 */
.tl-detail {
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px dashed rgba(0, 0, 0, 0.08);
  font-size: 0.85rem;
  color: #555;
  line-height: 1.7;
  display: none;
}

.timeline-item[data-expand] .tl-detail {
  display: block;
}

/* ---- 行业观察章节 ---- */
.section-insights {
  background: var(--color-white);
  padding-bottom: var(--space-xl);
}

.insights-image-wrap {
  max-width: var(--max-width);
  margin: 0 auto var(--space-lg);
  padding: 0 var(--space-md);
  box-sizing: border-box;
}

.insights-img {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  aspect-ratio: 600 / 600;
  object-fit: cover;
  border: 2px solid var(--color-gold);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  background: var(--color-light-gray);
  margin: 0 auto;
}

.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  box-sizing: border-box;
}

.insight-card {
  background: var(--color-light-gray);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-bottom: 3px solid var(--color-gold);
  padding: var(--space-lg);
  position: relative;
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
  cursor: default;
}

.insight-card:hover {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.07);
  transform: translateY(-3px);
}

.card-num {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 2.8rem;
  color: var(--color-gold);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: var(--space-sm);
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
}

.card-title {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-black);
  margin: 0 0 var(--space-sm);
  letter-spacing: 0.01em;
}

.card-desc {
  font-weight: 300;
  font-size: 0.9rem;
  color: #444;
  line-height: 1.7;
  margin: 0;
}

.card-detail {
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px dashed rgba(0, 0, 0, 0.08);
  font-size: 0.85rem;
  color: #555;
  line-height: 1.7;
  display: none;
}

.insight-card[data-expand] .card-detail {
  display: block;
}

/* ---- 内容标签章节 ---- */
.section-tags {
  background: linear-gradient(180deg, var(--color-white) 0%, var(--color-light-gray) 100%);
  padding-bottom: var(--space-xl);
  border-top: 2px solid rgba(212, 175, 55, 0.15);
}

.tags-banner-wrap {
  max-width: var(--max-width);
  margin: 0 auto var(--space-lg);
  padding: 0 var(--space-md);
  box-sizing: border-box;
}

.tags-banner {
  display: block;
  width: 100%;
  max-width: 1200px;
  height: auto;
  aspect-ratio: 1200 / 600;
  object-fit: cover;
  border: 2px solid var(--color-primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  background: var(--color-light-gray);
  margin: 0 auto;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md) var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  box-sizing: border-box;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-black);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: calc(0.75rem + 0.2 * (var(--tag-size, 1) - 0.7));
  padding: 0.4rem 1rem 0.4rem 1.2rem;
  border: 1px solid var(--color-gold);
  background: var(--color-white);
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.tag-item::before {
  content: '';
  position: absolute;
  left: -1px;
  top: -1px;
  bottom: -1px;
  width: 4px;
  background: var(--color-primary);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.tag-item:hover,
.tag-item:focus-visible {
  background: var(--color-gold);
  color: var(--color-black);
  border-color: var(--color-gold);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(212, 175, 55, 0.25);
  outline: none;
}

.tag-item:hover::before,
.tag-item:focus-visible::before {
  opacity: 1;
}

.tag-label {
  font-weight: 600;
  letter-spacing: 0.02em;
}

.tag-count {
  font-weight: 900;
  color: var(--color-gold);
  font-size: 0.85em;
  background: rgba(212, 175, 55, 0.08);
  padding: 0.05rem 0.45rem;
  border-radius: 0;
  transition: color var(--transition-fast);
}

.tag-item:hover .tag-count,
.tag-item:focus-visible .tag-count {
  color: var(--color-primary);
}

/* ---- 底部装饰 ---- */
.page-footer-deco {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md) 0;
  box-sizing: border-box;
}

.deco-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 200;
  object-fit: cover;
  opacity: 0.7;
  background: var(--color-light-gray);
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .news-lead {
    padding: var(--space-xl) var(--space-lg) var(--space-lg);
  }

  .timeline::before {
    left: 28px;
  }

  .timeline-item {
    padding-left: 68px;
  }

  .timeline-marker {
    left: 18px;
  }

  .marker-dot {
    width: 22px;
    height: 22px;
  }

  .tl-title {
    font-size: 1.25rem;
  }

  .insights-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tags-cloud {
    gap: var(--space-md) var(--space-xl);
  }
}

@media (min-width: 960px) {
  .news-lead {
    padding: var(--space-xl) calc((100vw - var(--max-width)) / 2 + var(--space-lg)) var(--space-lg);
  }

  .timeline::before {
    left: 40px;
  }

  .timeline-item {
    padding-left: 90px;
  }

  .timeline-marker {
    left: 28px;
  }

  .marker-dot {
    width: 26px;
    height: 26px;
  }

  .timeline-content {
    max-width: 760px;
  }

  .insights-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .tags-cloud {
    gap: var(--space-lg) var(--space-xl);
  }
}

@media (min-width: 1200px) {
  .section-header,
  .updates-chart-wrap,
  .timeline,
  .insights-image-wrap,
  .insights-grid,
  .tags-banner-wrap,
  .tags-cloud {
    padding-left: calc((100vw - var(--max-width)) / 2 + var(--space-md));
    padding-right: calc((100vw - var(--max-width)) / 2 + var(--space-md));
  }

  .news-headline {
    font-size: 4rem;
  }
}

/* 确保移动端不溢出 */
@media (max-width: 399px) {
  .timeline-item {
    padding-left: 44px;
  }

  .timeline::before {
    left: 14px;
  }

  .timeline-marker {
    left: 6px;
  }

  .marker-dot {
    width: 16px;
    height: 16px;
    border-width: 2px;
  }

  .timeline-content {
    padding: var(--space-sm) var(--space-md);
  }

  .filter-btn {
    font-size: 0.65rem;
    padding: 0.25rem 0.7rem;
  }

  .insight-card {
    padding: var(--space-md);
  }

  .card-num {
    font-size: 2rem;
  }
}

.page-news {
  --tag-size: 1rem;
}