.page-news {
  --news-glow: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(57,255,20,0.08) 0%, transparent 70%);
  --timeline-line: var(--clr-highlight);
  --timeline-dot-size: 14px;
  --timeline-line-width: 3px;
  --card-radius: var(--radius-md);
  --card-surface: var(--clr-surface);
  --card-border: var(--clr-border);
  --tag-update: var(--clr-primary);
  --tag-video: var(--clr-accent);
  --tag-announce: var(--clr-highlight);
  --tag-insight: var(--clr-accent-light);
  --filter-gap: 8px;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0 20px 48px;
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
}

/* ---- 舞台区 ---- */
.news__stage {
  position: relative;
  padding: 32px 0 24px;
  text-align: center;
}
.news__glow {
  position: absolute;
  top: -20px;
  left: 50%;
  width: 100%;
  max-width: 700px;
  height: 200px;
  background: var(--news-glow);
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 0;
}
.page-news .breadcrumb {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--size-sm);
  color: var(--clr-text-secondary);
  justify-content: center;
  margin-bottom: 16px;
}
.page-news .breadcrumb__link {
  color: var(--clr-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-news .breadcrumb__link:hover {
  color: var(--clr-highlight);
}
.page-news .breadcrumb__sep {
  color: var(--clr-border);
  font-size: var(--size-xs);
}
.page-news .breadcrumb__current {
  color: var(--clr-text);
  font-weight: 600;
}
.news__headline {
  position: relative;
  z-index: 1;
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(2rem, 6vw, 3.2rem);
  color: var(--clr-text);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
  text-shadow: 0 0 30px rgba(57,255,20,0.15);
}
.news__lead {
  position: relative;
  z-index: 1;
  font-size: var(--size-md);
  color: var(--clr-text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ---- 分类筛选 ---- */
.news__filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--filter-gap);
  justify-content: center;
  padding: 16px 0 28px;
  position: relative;
  z-index: 2;
}
.filter__btn {
  font-family: var(--font-body);
  font-size: var(--size-sm);
  font-weight: 600;
  padding: 8px 20px;
  border: 2px solid var(--clr-border);
  border-radius: 999px;
  background: transparent;
  color: var(--clr-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  letter-spacing: 0.02em;
  -webkit-appearance: none;
  appearance: none;
}
.filter__btn:hover {
  border-color: var(--clr-primary);
  color: var(--clr-text);
  box-shadow: var(--shadow-glow-blue);
}
.filter__btn--active {
  border-color: var(--clr-highlight);
  background: rgba(57,255,20,0.1);
  color: var(--clr-highlight);
  box-shadow: 0 0 16px rgba(57,255,20,0.2);
}

/* ---- 时间轴 ---- */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 36px;
  padding: 8px 0 16px;
}
.timeline__track {
  display: none;
}

/* 条目 */
.timeline__item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 28px;
}
.timeline__item::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 18px;
  bottom: -18px;
  width: var(--timeline-line-width);
  background: var(--timeline-line);
  opacity: 0.3;
  border-radius: 2px;
}
.timeline__item:last-child::before {
  display: none;
}

/* 标记器 */
.timeline__marker {
  display: flex;
  align-items: center;
  gap: 12px;
}
.marker__dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: var(--timeline-dot-size);
  height: var(--timeline-dot-size);
  border-radius: 50%;
  background: var(--timeline-line);
  box-shadow: 0 0 12px rgba(57,255,20,0.5), 0 0 28px rgba(57,255,20,0.15);
  flex-shrink: 0;
  z-index: 2;
}
.marker__date {
  font-family: var(--font-mono);
  font-size: var(--size-sm);
  font-weight: 500;
  color: var(--clr-highlight);
  letter-spacing: 0.06em;
  line-height: 1;
  opacity: 0.9;
}

/* 卡片 */
.timeline__card {
  background: var(--card-surface);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: 20px 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  position: relative;
}
.timeline__card:hover {
  border-color: rgba(57,255,20,0.25);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
.card__badge {
  display: flex;
}
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 12px;
  border-radius: 999px;
  line-height: 1.5;
}
.badge--update {
  background: rgba(30,144,255,0.18);
  color: var(--clr-primary);
  border: 1px solid rgba(30,144,255,0.3);
}
.badge--video {
  background: rgba(255,107,53,0.18);
  color: var(--clr-accent);
  border: 1px solid rgba(255,107,53,0.3);
}
.badge--announce {
  background: rgba(57,255,20,0.12);
  color: var(--clr-highlight);
  border: 1px solid rgba(57,255,20,0.25);
}
.badge--insight {
  background: rgba(255,140,66,0.15);
  color: var(--clr-accent-light);
  border: 1px solid rgba(255,140,66,0.25);
}
.card__heading {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--size-lg);
  color: var(--clr-text);
  margin: 0;
  line-height: 1.35;
}
.card__excerpt {
  font-size: var(--size-base);
  color: var(--clr-text-secondary);
  line-height: 1.65;
  margin: 0;
}
.card__media {
  margin: 4px 0 0;
  border-radius: calc(var(--radius-sm) + 2px);
  overflow: hidden;
  background: var(--clr-bg);
}
.card__media--icon {
  max-width: 100px;
}
.card__img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--clr-bg);
}
.card__img--compact {
  width: 200px;
  height: 200px;
  border-radius: var(--radius-sm);
}
.card__img--wide {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 400/225;
  border-radius: var(--radius-sm);
}
.card__img--hero {
  width: 100%;
  max-width: 600px;
  aspect-ratio: 600/300;
  border-radius: var(--radius-sm);
}
.card__img--icon {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-sm);
}

/* 可展开详情 */
.card__details {
  margin-top: 4px;
  border-top: 1px solid var(--clr-border);
  padding-top: 12px;
}
.card__toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--size-sm);
  font-weight: 600;
  color: var(--clr-primary);
  cursor: pointer;
  list-style: none;
  -webkit-user-select: none;
  user-select: none;
  transition: color var(--transition-fast);
}
.card__toggle::-webkit-details-marker {
  display: none;
}
.card__toggle:hover {
  color: var(--clr-highlight);
}
.toggle__icon {
  display: inline-block;
  font-size: 12px;
  transition: transform var(--transition-base);
  line-height: 1;
}
.card__details[open] .toggle__icon {
  transform: rotate(180deg);
}
.card__detail {
  font-size: var(--size-sm);
  color: var(--clr-text-secondary);
  line-height: 1.7;
  padding: 12px 0 4px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.card__detail p {
  margin: 0;
}

/* ---- 底部CTA ---- */
.news__cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 44px 20px 20px;
  text-align: center;
  border-top: 1px solid var(--clr-border);
  margin-top: 20px;
}
.cta__text {
  font-size: var(--size-md);
  color: var(--clr-text-secondary);
  margin: 0;
}
.page-news .btn {
  font-size: var(--size-sm);
  padding: 10px 28px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: all var(--transition-base);
  border: 2px solid transparent;
}
.page-news .btn-primary {
  background: var(--clr-primary);
  color: var(--clr-text);
  border-color: var(--clr-primary);
}
.page-news .btn-primary:hover {
  background: var(--clr-primary-dark);
  box-shadow: var(--shadow-glow-blue);
}
.page-news .btn-secondary {
  background: transparent;
  color: var(--clr-text);
  border-color: var(--clr-border);
}
.page-news .btn-secondary:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}
.news__cta .btn + .btn {
  margin-left: 0;
}

/* ---- 平板/桌面 ---- */
@media (min-width: 640px) {
  .page-news {
    padding: 0 32px 56px;
  }
  .news__stage {
    padding: 40px 0 20px;
  }
  .news__headline {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
  }
  .news__filters {
    gap: 12px;
    padding: 20px 0 36px;
  }
  .filter__btn {
    font-size: var(--size-base);
    padding: 10px 28px;
  }
  .timeline {
    gap: 44px;
    padding: 12px 0 24px;
  }
  .timeline__item {
    flex-direction: row;
    gap: 0;
    padding-left: 0;
  }
  .timeline__item::before {
    display: none;
  }
  .timeline__track {
    display: block;
    position: absolute;
    left: 120px;
    top: 24px;
    bottom: 24px;
    width: var(--timeline-line-width);
    background: var(--timeline-line);
    opacity: 0.2;
    border-radius: 2px;
    pointer-events: none;
  }
  .timeline__marker {
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
    width: 100px;
    flex-shrink: 0;
    padding-top: 8px;
    position: relative;
  }
  .marker__dot {
    position: relative;
    top: auto;
    left: auto;
    width: 16px;
    height: 16px;
    margin-right: -8px;
    z-index: 3;
  }
  .marker__date {
    font-size: var(--size-base);
    white-space: nowrap;
    padding-right: 16px;
  }
  .timeline__card {
    flex: 1;
    margin-left: 28px;
    padding: 24px 28px 20px;
  }
  .card__heading {
    font-size: var(--size-xl);
  }
  .card__excerpt {
    font-size: var(--size-md);
  }
  .card__detail {
    font-size: var(--size-base);
  }
  .news__cta {
    flex-direction: row;
    justify-content: center;
    gap: 20px;
    padding: 48px 20px 24px;
  }
  .news__cta .btn + .btn {
    margin-left: 4px;
  }
}

@media (min-width: 960px) {
  .page-news {
    padding: 0 40px 64px;
  }
  .news__stage {
    padding: 48px 0 24px;
  }
  .news__lead {
    font-size: var(--size-lg);
  }
  .timeline {
    gap: 52px;
  }
  .timeline__track {
    left: 160px;
  }
  .timeline__marker {
    width: 140px;
  }
  .marker__date {
    font-size: var(--size-md);
    padding-right: 24px;
  }
  .timeline__card {
    margin-left: 40px;
    padding: 28px 32px 24px;
  }
  .card__heading {
    font-size: var(--size-2xl);
  }
  .card__media--icon {
    max-width: 100px;
  }
}