/* ===== 页面专属 CSS：page-news ===== */
.page-news {
  --section-title-size: 1.75rem;
  --timeline-gold-line: var(--color-gold);
  --timeline-dot-size: 20px;
}

/* 面包屑 */
.page-news .breadcrumb {
  padding-top: 1rem;
  padding-bottom: 0.5rem;
  color: var(--color-gray);
  font-size: var(--small-size);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.page-news .breadcrumb__link {
  color: var(--color-gold);
  text-decoration: none;
  transition: color var(--transition);
}
.page-news .breadcrumb__link:hover,
.page-news .breadcrumb__link:focus-visible {
  text-decoration: underline;
  color: var(--color-gold-light);
}
.page-news .breadcrumb__sep {
  margin: 0 0.25rem;
}
.page-news .breadcrumb__current {
  color: var(--color-white);
  font-weight: 600;
}

/* 页面英雄区 */
.page-news__hero {
  padding-top: 2rem;
  padding-bottom: 1.5rem;
}
.page-news__hero-title {
  color: var(--color-primary);
  font-size: var(--h1-size);
  line-height: var(--h1-line);
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.page-news__hero-subtitle {
  color: var(--color-gray);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  line-height: 1.5;
  max-width: 600px;
}

/* 中段双列布局 */
.page-news__middle {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem 2rem;
  padding-bottom: 2.5rem;
}
@media (min-width: 768px) {
  .page-news__middle {
    grid-template-columns: 0.9fr 1.1fr;
  }
}

/* 左栏：时间线 */
.page-news__timeline-col {
  position: relative;
}
.page-news__section-title {
  color: var(--color-primary);
  font-size: var(--section-title-size);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--color-gold);
  padding-bottom: 0.5rem;
  display: inline-block;
}
.page-news__timeline-update {
  margin-bottom: 1.5rem;
}
.page-news__timeline-summary {
  color: var(--color-white);
  font-size: var(--body-size);
  line-height: var(--body-line);
  margin-bottom: 1rem;
}
.page-news__chart-img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.03);
}

/* 时间线列表 */
.page-news__timeline-list {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
}
.page-news__timeline-list::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--timeline-gold-line), rgba(201,169,110,0.2));
}
.page-news__timeline-item {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  position: relative;
  cursor: pointer;
}
.page-news__timeline-dot {
  flex-shrink: 0;
  width: var(--timeline-dot-size);
  height: var(--timeline-dot-size);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}
.page-news__dot-icon {
  display: block;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--color-gold);
  background: var(--color-bg);
  object-fit: cover;
}
.page-news__timeline-content {
  flex: 1;
  min-width: 0;
}
.page-news__timeline-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--color-white);
  font-size: 1rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.page-news__timeline-header:hover,
.page-news__timeline-header:focus-visible {
  background: rgba(201,169,110,0.1);
}
.page-news__timeline-month {
  color: var(--color-gold);
}
.page-news__timeline-badge {
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.page-news__timeline-body {
  padding: 0.5rem 0.5rem 0.5rem 1rem;
  color: var(--color-gray);
  font-size: var(--small-size);
  line-height: 1.5;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.page-news__timeline-item[data-accordion] .page-news__timeline-body[data-accordion-body] {
  max-height: 0;
  padding: 0 0.5rem 0 1rem;
}
.page-news__timeline-item[data-accordion][data-open] .page-news__timeline-body[data-accordion-body] {
  max-height: 200px;
  padding: 0.5rem 0.5rem 0.5rem 1rem;
}

/* 右栏：文章卡片 */
.page-news__articles-col {
  min-width: 0;
}
.page-news__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}
.page-news__filter-btn {
  font-size: 0.85rem;
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
  border: 1px solid var(--color-gold);
  background: transparent;
  color: var(--color-gold);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.page-news__filter-btn.is-active,
.page-news__filter-btn:hover,
.page-news__filter-btn:focus-visible {
  background: var(--color-gold);
  color: var(--color-bg);
}
.page-news__article-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-news__article-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.page-news__article-card:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-hover);
}
.page-news__article-img-wrap {
  max-height: 250px;
  overflow: hidden;
}
.page-news__article-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.page-news__article-card:hover .page-news__article-img {
  transform: scale(1.03);
}
.page-news__article-body {
  padding: 1.25rem;
}
.page-news__article-body .tag {
  display: inline-block;
  margin-bottom: 0.75rem;
}

/* 按钮变体 */
.btn--small {
  font-size: 0.85rem;
  padding: 0.4rem 1rem;
}

/* 历史更新索引 */
.page-news__history {
  padding-top: 2rem;
  padding-bottom: 2rem;
}
.page-news__history-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.25rem;
}
.page-news__history-item {
  background: rgba(255,255,255,0.02);
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--color-gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.page-news__history-month {
  display: block;
  color: var(--color-gold);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}
.page-news__history-summary {
  color: var(--color-gray);
  font-size: var(--small-size);
  line-height: 1.5;
  margin: 0;
}
.page-news__history-note {
  margin-top: 1.25rem;
  color: var(--color-gray);
  font-size: var(--small-size);
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
}

/* 底部品牌图 */
.page-news__brand-img {
  display: flex;
  justify-content: center;
  padding: 1.5rem 0 2.5rem;
}
.page-news__brand-icon {
  max-width: 100%;
  height: auto;
  opacity: 0.5;
  transition: opacity var(--transition);
}
.page-news__brand-icon:hover {
  opacity: 0.8;
}

/* 响应式微调 */
@media (max-width: 767px) {
  .page-news__middle {
    grid-template-columns: 1fr;
  }
  .page-news__hero-title {
    font-size: 2rem;
  }
  .page-news__section-title {
    font-size: 1.35rem;
  }
  .page-news__timeline-list::before {
    left: 8px;
  }
  .page-news__timeline-dot {
    width: 16px;
    height: 16px;
  }
  .page-news__dot-icon {
    width: 16px;
    height: 16px;
  }
  .page-news__timeline-header {
    font-size: 0.9rem;
  }
  .page-news__article-img-wrap {
    max-height: 200px;
  }
  .page-news__history-item {
    padding: 0.75rem 1rem;
  }
}
</style>