.page-news {
  --color-card-border: rgba(255, 107, 53, 0.20);
  --color-timeline-line: rgba(255, 107, 53, 0.40);
  --color-year-bg: rgba(11, 29, 58, 0.85);
  --color-card-hover-bg: rgba(255, 255, 255, 0.03);
  --color-gradient-card: linear-gradient(145deg, #0B1D3A, #1A0A2E);
  --color-gradient-card-alt: linear-gradient(145deg, #0A1128, #0B1D3A);
  --color-glass-deep: rgba(255, 255, 255, 0.04);
  --radius-card: var(--radius-lg);
  --radius-img: var(--radius-md);
  --transition-card: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* hero 区域 */
.page-news__hero {
  position: relative;
  overflow: hidden;
  min-height: 280px;
  display: flex;
  align-items: flex-end;
  background: var(--color-bg-dark);
}

.page-news__hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.page-news__hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  opacity: 0.55;
  display: block;
}

.page-news__hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 17, 40, 0.30) 0%, rgba(10, 17, 40, 0.88) 100%);
  pointer-events: none;
}

.page-news__hero-content {
  position: relative;
  z-index: 1;
  padding-top: 3rem;
  padding-bottom: 2.5rem;
}

.page-news .breadcrumb {
  font-family: var(--font-nav);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.page-news .breadcrumb a {
  color: var(--color-text-light);
  text-decoration: none;
  opacity: 0.75;
  transition: opacity var(--transition);
}

.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  opacity: 1;
  text-decoration: underline;
}

.page-news .breadcrumb .separator {
  color: var(--color-accent);
  opacity: 0.6;
}

.page-news .breadcrumb [aria-current="page"] {
  color: var(--color-accent);
  font-weight: 600;
}

.page-news__title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  font-style: italic;
  color: var(--color-text-light);
  margin: 0 0 0.35rem;
  line-height: 1.15;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.60);
}

.page-news__subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  margin: 0;
  opacity: 0.90;
}

/* 通用 section */
.page-news__section {
  position: relative;
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.page-news__section--updates {
  background: var(--color-bg-dark);
}

.page-news__section--guides {
  background: var(--color-bg-dark);
  background-image: radial-gradient(ellipse at 20% 80%, rgba(11, 29, 58, 0.60) 0%, transparent 70%);
}

.page-news__section--data-vision {
  background: var(--color-bg-dark);
  background-image: radial-gradient(ellipse at 80% 20%, rgba(155, 89, 182, 0.12) 0%, transparent 60%);
}

.page-news__section--more {
  background: var(--color-bg-dark);
  border-top: 1px solid rgba(255, 107, 53, 0.10);
}

/* section 背景图 */
.page-news__section-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  opacity: 0.12;
}

.page-news__section-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}

.page-news__section--updates .page-news__section-bg {
  opacity: 0.08;
}

/* section header */
.page-news__section-header {
  position: relative;
  z-index: 1;
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--color-accent);
  border-image: linear-gradient(90deg, var(--color-accent), transparent) 1;
}

.page-news__section-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  font-style: italic;
  color: var(--color-text-light);
  margin: 0 0 0.35rem;
  line-height: 1.2;
}

.page-news__section-desc {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.65);
  margin: 0;
}

/* 时间线布局 */
.page-news__timeline {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.page-news__year-marker {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.page-news__year-label {
  font-family: var(--font-data);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-accent);
  background: var(--color-year-bg);
  padding: 0.2rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 107, 53, 0.30);
  flex-shrink: 0;
  line-height: 1.3;
}

.page-news__year-line {
  flex: 1;
  height: 2px;
  background: var(--color-timeline-line);
  align-self: center;
  border-radius: 1px;
}

.page-news__timeline-cards {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-left: 0.5rem;
  border-left: 2px solid var(--color-timeline-line);
  margin-left: 1.25rem;
}

/* 卡片基础 */
.page-news__card {
  position: relative;
  background: var(--color-gradient-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-card-border);
  overflow: hidden;
  transition: transform var(--transition-card), box-shadow var(--transition-card), background var(--transition-card);
  cursor: default;
}

.page-news__card:hover,
.page-news__card:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  background: var(--color-card-hover-bg);
  background: var(--color-gradient-card-alt);
}

/* 时间线卡片 */
.page-news__card--timeline {
  padding: 1.25rem 1.5rem;
  min-height: 120px;
}

.page-news__card--timeline:nth-child(2) {
  min-height: 100px;
}

.page-news__card--timeline:nth-child(3) {
  min-height: 140px;
}

/* 卡片标签 */
.page-news__card-tag {
  display: inline-block;
  font-family: var(--font-nav);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.12);
  padding: 0.15rem 0.65rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  border: 1px solid rgba(255, 107, 53, 0.18);
}

/* 卡片标题 */
.page-news__card-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  font-style: italic;
  color: var(--color-text-light);
  margin: 0 0 0.5rem;
  line-height: 1.3;
  transition: color var(--transition);
}

.page-news__card:hover .page-news__card-title {
  color: var(--color-accent);
}

/* 卡片摘要 */
.page-news__card-excerpt {
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.70);
  margin: 0 0 0.35rem;
  line-height: 1.6;
}

/* 卡片详情 (悬停展开) */
.page-news__card-details {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.6;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease, opacity 0.35s ease, margin 0.35s ease;
  opacity: 0;
  margin-top: 0;
}

.page-news__card-details p {
  margin: 0 0 0.5rem;
}

.page-news__card-details p:last-child {
  margin-bottom: 0;
}

.page-news__card:hover .page-news__card-details,
.page-news__card:focus-within .page-news__card-details {
  max-height: 300px;
  opacity: 1;
  margin-top: 0.75rem;
}

/* 内联链接 */
.page-news__inline-link {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: rgba(255, 107, 53, 0.35);
  transition: text-decoration-color var(--transition), color var(--transition);
  font-weight: 500;
}

.page-news__inline-link:hover,
.page-news__inline-link:focus-visible {
  color: var(--color-accent-hover);
  text-decoration-color: var(--color-accent-hover);
}

.page-news__card-link-wrap {
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

/* 网格系统 */
.page-news__grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  position: relative;
  z-index: 1;
}

/* 指南卡片 */
.page-news__card--guide {
  display: flex;
  flex-direction: column;
}

.page-news__card--guide .page-news__card-content {
  padding: 1.25rem 1.5rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* 图片包装 */
.page-news__card-img-wrap {
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-img) var(--radius-img) 0 0;
  aspect-ratio: 4 / 3;
  background: var(--color-bg-dark);
}

.page-news__card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.page-news__card:hover .page-news__card-img {
  transform: scale(1.03);
}

/* 数据视野卡片 */
.page-news__card--vision {
  display: flex;
  flex-direction: column;
}

.page-news__card--vision .page-news__card-img-wrap {
  border-radius: var(--radius-img) var(--radius-img) 0 0;
  aspect-ratio: 2 / 1;
}

.page-news__card--vision .page-news__card-content {
  padding: 1.25rem 1.5rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* 更多内容区域 */
.page-news__more-links {
  position: relative;
  z-index: 1;
  font-family: var(--font-body);
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
}

.page-news__more-links a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: rgba(255, 107, 53, 0.30);
  transition: color var(--transition), text-decoration-color var(--transition);
}

.page-news__more-links a:hover,
.page-news__more-links a:focus-visible {
  color: var(--color-accent-hover);
  text-decoration-color: var(--color-accent-hover);
}

/* ---- 响应式 ---- */
@media (min-width: 640px) {
  .page-news__hero {
    min-height: 340px;
  }

  .page-news__hero-content {
    padding-top: 4rem;
    padding-bottom: 3rem;
  }

  .page-news__title {
    font-size: 2.8rem;
  }

  .page-news__subtitle {
    font-size: 1.1rem;
  }

  .page-news__section {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .page-news__section-title {
    font-size: 1.9rem;
  }

  .page-news__section-desc {
    font-size: 1rem;
  }

  .page-news__timeline-cards {
    padding-left: 1.5rem;
    margin-left: 2rem;
    gap: 1.5rem;
  }

  .page-news__year-label {
    font-size: 2.2rem;
    padding: 0.3rem 1.4rem;
  }

  .page-news__card--timeline {
    padding: 1.5rem 2rem;
  }

  .page-news__card-title {
    font-size: 1.3rem;
  }

  .page-news__grid-2 {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .page-news__card--guide .page-news__card-content {
    padding: 1.5rem 1.75rem 1.75rem;
  }

  .page-news__card--vision .page-news__card-content {
    padding: 1.5rem 1.75rem 1.75rem;
  }

  .page-news__more-links {
    font-size: 1.05rem;
  }
}

@media (min-width: 1024px) {
  .page-news__hero {
    min-height: 400px;
  }

  .page-news__hero-content {
    padding-top: 5rem;
    padding-bottom: 3.5rem;
  }

  .page-news__title {
    font-size: 3.4rem;
  }

  .page-news__subtitle {
    font-size: 1.2rem;
  }

  .page-news__section {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }

  .page-news__section-title {
    font-size: 2.2rem;
  }

  .page-news__timeline {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-news__year-marker {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    min-width: 100px;
    margin-bottom: 0;
    padding-top: 0.5rem;
  }

  .page-news__year-line {
    width: 2px;
    height: 120px;
    flex: none;
  }

  .page-news__timeline-cards {
    padding-left: 2rem;
    margin-left: 0;
    border-left: 2px solid var(--color-timeline-line);
    flex: 1;
  }

  .page-news__year-label {
    font-size: 2.6rem;
    padding: 0.3rem 1.2rem;
  }

  .page-news__card--timeline {
    padding: 1.75rem 2.25rem;
  }

  .page-news__grid-2 {
    gap: 2rem;
  }
}