.page-news {
  --timeline-accent: #6a4e9c;
  --timeline-accent-rgb: 106, 78, 156;
  --timeline-line: #2a3d5c;
  --timeline-node-bg: #1b2a3f;
  --timeline-gold: #f5d76e;
  --timeline-card-bg: #0d1b2a;
  --timeline-card-border: #2a3d5c;
  --timeline-card-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --timeline-radius: 12px;
  --timeline-spacing: 2rem;

  max-width: var(--content-max-width, 1200px);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  color: var(--color-cold-white, #e0e5ec);
  position: relative;
}

/* ===== 面包屑 ===== */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted, #9aa8b9);
  margin-bottom: 2rem;
  letter-spacing: 0.02em;
}
.page-news .breadcrumb__link {
  color: var(--color-text-muted, #9aa8b9);
  text-decoration: none;
  transition: color 0.2s;
}
.page-news .breadcrumb__link:hover,
.page-news .breadcrumb__link:focus-visible {
  color: var(--color-bright-white, #ffffff);
}
.page-news .breadcrumb__sep {
  margin: 0 0.25rem;
  user-select: none;
}
.page-news .breadcrumb__current {
  color: var(--color-bright-white, #ffffff);
  font-weight: 500;
}

/* =====  Hero 区域 ===== */
.page-news__hero {
  margin-bottom: 3.5rem;
  position: relative;
}
.page-news__hero-title {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 700;
  color: var(--color-bright-white, #ffffff);
  letter-spacing: 0.04em;
  line-height: 1.15;
  margin: 0 0 0.75rem;
}
.page-news__hero-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted, #9aa8b9);
  max-width: 660px;
  line-height: 1.6;
  margin: 0;
}

/* ===== 章节标题 ===== */
.page-news .section-title {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin: 0 0 1.5rem;
}
.page-news .section-title__text {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  font-weight: 600;
  color: var(--color-bright-white, #ffffff);
  letter-spacing: 0.02em;
}
.page-news .section-title__sub {
  font-size: 0.875rem;
  color: var(--color-text-muted, #9aa8b9);
  font-weight: 400;
  letter-spacing: 0.06em;
}
.page-news__section-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  gap: 1rem;
}
.page-news__section-guide {
  display: none;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
  margin-top: 0.5rem;
}
.page-news__guide-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--timeline-accent);
}
.page-news__guide-line {
  width: 60px;
  height: 1px;
  background: var(--timeline-line);
}

/* ===== 时间线容器 ===== */
.page-news .timeline {
  position: relative;
  padding-left: 0;
}

/* ===== 月份分组 ===== */
.page-news .timeline__month-group {
  margin-bottom: 3rem;
  position: relative;
}
.page-news .timeline__month-group:last-child {
  margin-bottom: 0;
}

.page-news .timeline__month-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  position: relative;
}
.page-news .timeline__month-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--timeline-card-bg);
  border: 1px solid var(--timeline-accent);
  padding: 6px;
  box-shadow: 0 0 0 3px rgba(106, 78, 156, 0.2);
}
.page-news .timeline__month-text {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--timeline-accent);
  letter-spacing: 0.08em;
  position: relative;
}
.page-news .timeline__month-text::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: var(--timeline-accent);
  opacity: 0.4;
  border-radius: 1px;
}

/* ===== 时间线条目 ===== */
.page-news .timeline__items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-left: 0.5rem;
  border-left: 2px solid var(--timeline-line);
  padding-left: 1rem;
}

.page-news .timeline__item {
  background: var(--timeline-card-bg);
  border: 1px solid var(--timeline-card-border);
  border-radius: var(--timeline-radius);
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
  position: relative;
}
.page-news .timeline__item::before {
  content: '';
  position: absolute;
  left: -1.15rem;
  top: 1.25rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--timeline-accent);
  border: 2px solid var(--color-deep-blue, #0a1628);
  box-shadow: 0 0 0 2px var(--timeline-accent);
  z-index: 1;
}
.page-news .timeline__item:hover {
  border-color: rgba(106, 78, 156, 0.4);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.page-news .timeline__item-summary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background 0.2s;
}
.page-news .timeline__item-summary::-webkit-details-marker {
  display: none;
}
.page-news .timeline__item-summary:hover {
  background: rgba(106, 78, 156, 0.06);
}
.page-news .timeline__item-summary:focus-visible {
  outline: 2px solid var(--timeline-accent);
  outline-offset: -2px;
}

.page-news .timeline__item-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: var(--timeline-card-border);
  color: var(--color-cold-white, #e0e5ec);
  flex-shrink: 0;
  line-height: 1.4;
}
.page-news .timeline__item-badge--refresh {
  background: rgba(106, 78, 156, 0.25);
  color: var(--timeline-accent);
  border: 1px solid rgba(106, 78, 156, 0.3);
}
.page-news .timeline__item-badge--index {
  background: rgba(245, 215, 110, 0.15);
  color: var(--timeline-gold);
  border: 1px solid rgba(245, 215, 110, 0.2);
}
.page-news .timeline__item-badge--optimize {
  background: rgba(224, 229, 236, 0.1);
  color: var(--color-cold-white, #e0e5ec);
  border: 1px solid rgba(224, 229, 236, 0.15);
}

.page-news .timeline__item-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-bright-white, #ffffff);
  letter-spacing: 0.01em;
  flex: 1 1 auto;
  min-width: 0;
}

.page-news .timeline__item-arrow {
  font-size: 1.1rem;
  color: var(--color-text-muted, #9aa8b9);
  transition: transform 0.3s;
  flex-shrink: 0;
}
.page-news .timeline__item[open] .timeline__item-arrow {
  transform: rotate(90deg);
}

.page-news .timeline__item-body {
  padding: 0 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-news .timeline__item-figure {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  object-fit: cover;
  background: var(--timeline-card-border);
  flex-shrink: 0;
  margin: 0.25rem 0 0.25rem;
}

.page-news .timeline__item-excerpt {
  font-size: 0.925rem;
  line-height: 1.6;
  color: var(--color-cold-white, #e0e5ec);
  margin: 0;
}

.page-news .timeline__item-detail {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text-muted, #9aa8b9);
  padding-top: 0.5rem;
  border-top: 1px solid rgba(42, 61, 92, 0.4);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.page-news .timeline__item-detail p {
  margin: 0;
}
.page-news .timeline__item-detail strong {
  color: var(--color-bright-white, #ffffff);
  font-weight: 600;
}

.page-news .timeline__item-link {
  align-self: flex-start;
  font-size: 0.85rem;
}

/* ===== 服务洞察 ===== */
.page-news__insights {
  margin-top: 3.5rem;
  padding-top: 1rem;
}

.page-news .insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-news .insights-card {
  background: var(--timeline-card-bg);
  border: 1px solid var(--timeline-card-border);
  border-radius: var(--timeline-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.page-news .insights-card:hover {
  border-color: rgba(106, 78, 156, 0.3);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.page-news .insights-card--featured {
  border-color: rgba(106, 78, 156, 0.2);
}

.page-news .insights-card__image-wrap {
  width: 100%;
  overflow: hidden;
  background: var(--timeline-card-border);
}
.page-news .insights-card__image-wrap--tall {
  max-height: 320px;
}

.page-news .insights-card__image {
  width: 100%;
  height: auto;
  max-height: 240px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s;
}
.page-news .insights-card:hover .insights-card__image {
  transform: scale(1.02);
}
.page-news .insights-card__image--tall {
  max-height: 320px;
  object-position: center;
}

.page-news .insights-card__content {
  padding: 1.25rem 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}

.page-news .insights-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-bright-white, #ffffff);
  letter-spacing: 0.01em;
  margin: 0;
}

.page-news .insights-card__text {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-cold-white, #e0e5ec);
  margin: 0;
}

.page-news .insights-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.5rem;
}

.page-news .insights-card__tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  background: rgba(42, 61, 92, 0.4);
  color: var(--color-text-muted, #9aa8b9);
  letter-spacing: 0.04em;
  border: 1px solid rgba(42, 61, 92, 0.3);
}

.page-news .insights-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

.page-news .insights-card__btn {
  font-size: 0.85rem;
  padding: 0.4rem 1rem;
  border-color: var(--timeline-accent);
  color: var(--timeline-accent);
}
.page-news .insights-card__btn:hover,
.page-news .insights-card__btn:focus-visible {
  background: rgba(106, 78, 156, 0.12);
  border-color: var(--timeline-accent);
  color: var(--color-bright-white, #ffffff);
}

/* ===== 底部说明 ===== */
.page-news__note {
  margin-top: 3.5rem;
  padding-top: 0.5rem;
}
.page-news__note-inner {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  background: rgba(13, 27, 42, 0.6);
  border: 1px solid var(--timeline-card-border);
  border-radius: var(--timeline-radius);
  border-left: 3px solid var(--timeline-accent);
}
.page-news__note-text {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-text-muted, #9aa8b9);
  margin: 0;
}
.page-news__note-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  background: rgba(245, 215, 110, 0.1);
  color: var(--timeline-gold);
  letter-spacing: 0.06em;
  align-self: flex-start;
  border: 1px solid rgba(245, 215, 110, 0.15);
}

/* ===== 按钮 ghost 变体共享覆盖 ===== */
.page-news .btn--ghost {
  background: transparent;
  border: 1px solid var(--color-border, #2a3d5c);
  color: var(--color-cold-white, #e0e5ec);
  border-radius: 6px;
  padding: 0.45rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.page-news .btn--ghost:hover,
.page-news .btn--ghost:focus-visible {
  background: rgba(106, 78, 156, 0.08);
  border-color: var(--timeline-accent);
  color: var(--color-bright-white, #ffffff);
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-news {
    padding: 2.5rem 2.5rem 5rem;
  }

  .page-news__hero {
    margin-bottom: 4rem;
  }
  .page-news__hero-title {
    font-size: clamp(2.4rem, 5vw, 4rem);
  }
  .page-news__hero-desc {
    font-size: 1.1rem;
    max-width: 700px;
  }

  .page-news__section-guide {
    display: flex;
  }

  .page-news .timeline__month-group {
    margin-bottom: 3.5rem;
  }
  .page-news .timeline__items {
    margin-left: 1.5rem;
    padding-left: 2rem;
  }
  .page-news .timeline__item::before {
    left: -1.6rem;
    top: 1.5rem;
    width: 12px;
    height: 12px;
  }
  .page-news .timeline__item-summary {
    padding: 1.2rem 1.5rem;
    gap: 0.75rem;
  }
  .page-news .timeline__item-title {
    font-size: 1.05rem;
  }
  .page-news .timeline__item-body {
    padding: 0 1.5rem 1.5rem;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
  }
  .page-news .timeline__item-figure {
    width: 100px;
    height: 100px;
  }
  .page-news .timeline__item-excerpt {
    flex: 1;
    min-width: 200px;
    font-size: 0.95rem;
  }
  .page-news .timeline__item-detail {
    width: 100%;
    font-size: 0.9rem;
  }

  .page-news .insights-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.75rem;
  }
  .page-news .insights-card--featured {
    grid-column: 1 / -1;
    flex-direction: row;
  }
  .page-news .insights-card--featured .insights-card__image-wrap {
    width: 45%;
    max-height: none;
    flex-shrink: 0;
  }
  .page-news .insights-card--featured .insights-card__image {
    max-height: 300px;
    height: 100%;
    object-fit: cover;
  }
  .page-news .insights-card--featured .insights-card__content {
    padding: 1.5rem 2rem;
  }
  .page-news .insights-card--featured .insights-card__title {
    font-size: 1.25rem;
  }

  .page-news .insights-card--aside {
    flex-direction: row;
    grid-column: 1 / -1;
  }
  .page-news .insights-card--aside .insights-card__image-wrap--tall {
    width: 180px;
    max-height: none;
    flex-shrink: 0;
  }
  .page-news .insights-card--aside .insights-card__image--tall {
    max-height: 280px;
    object-fit: cover;
  }
  .page-news .insights-card--aside .insights-card__content {
    padding: 1.25rem 1.5rem;
    justify-content: center;
  }

  .page-news__note-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 2rem;
  }
  .page-news__note-text {
    max-width: 70%;
  }
  .page-news__note-badge {
    align-self: auto;
    flex-shrink: 0;
  }
}

@media (min-width: 1024px) {
  .page-news {
    padding: 3rem 3rem 6rem;
  }

  .page-news .timeline__items {
    margin-left: 2rem;
    padding-left: 2.5rem;
  }
  .page-news .timeline__item::before {
    left: -1.8rem;
    top: 1.7rem;
    width: 14px;
    height: 14px;
  }
  .page-news .timeline__month-label {
    margin-bottom: 1.5rem;
  }
  .page-news .timeline__month-icon {
    width: 64px;
    height: 64px;
  }

  .page-news .insights-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-news .insights-card--featured {
    grid-column: 1 / 3;
    grid-row: 1 / 2;
  }
  .page-news .insights-card--aside {
    grid-column: 3 / 4;
    grid-row: 1 / 3;
    flex-direction: column;
  }
  .page-news .insights-card--aside .insights-card__image-wrap--tall {
    width: 100%;
    max-height: 220px;
  }
  .page-news .insights-card--aside .insights-card__image--tall {
    max-height: 220px;
  }

  .page-news .insights-card:not(.insights-card--featured):not(.insights-card--aside) {
    grid-column: 1 / 3;
  }
}

/* ===== 移动端紧凑 ===== */
@media (max-width: 480px) {
  .page-news {
    padding: 1.25rem 1rem 3rem;
  }
  .page-news .timeline__items {
    margin-left: 0;
    padding-left: 0.75rem;
  }
  .page-news .timeline__item::before {
    left: -0.9rem;
    top: 1rem;
    width: 8px;
    height: 8px;
  }
  .page-news .timeline__item-summary {
    padding: 0.75rem 1rem;
  }
  .page-news .timeline__item-body {
    padding: 0 1rem 1rem;
  }
  .page-news .timeline__item-figure {
    width: 64px;
    height: 64px;
  }
  .page-news .insights-card__content {
    padding: 1rem 1rem 1.25rem;
  }
}
</PAGE_CSS>