.page-news {
  --color-news-bg: #f5f7fb;
  --color-news-card-bg: #ffffff;
  --color-news-border: #e0e0e0;
  --color-news-accent: #FF6B35;
  --color-news-primary: #0055FF;
  --color-news-text: #1A1A1A;
  --color-news-text-secondary: #666666;
  --color-news-timeline: #0055FF;
  --color-news-dot: #FF6B35;
  --font-news-heading: 'Inter', 'Noto Sans SC', sans-serif;
  --font-news-body: 'Inter', 'Noto Sans SC', sans-serif;
  --radius-news-card: 8px;
  --space-news-sm: 0.5rem;
  --space-news-md: 1rem;
  --space-news-lg: 1.5rem;
  --space-news-xl: 2rem;
  --space-news-2xl: 3rem;
}

/* 页面头部 */
.page-news__header {
  padding: var(--space-news-xl) 0 var(--space-news-lg);
  text-align: center;
}

.page-news__title {
  font-family: var(--font-news-heading);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  color: var(--color-news-text);
  margin: var(--space-news-sm) 0;
}

.page-news__subtitle {
  font-family: var(--font-news-body);
  font-size: var(--fs-small);
  color: var(--color-news-text-secondary);
  letter-spacing: 0.3px;
}

/* 最新动态 - 时间轴区域 */
.page-news__latest {
  position: relative;
  background: var(--color-news-bg);
  padding: var(--space-news-2xl) 0;
}

.page-news__latest-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  opacity: 0.1;
}

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

.page-news .section-title {
  font-family: var(--font-news-heading);
  font-weight: 700;
  font-style: italic;
  font-size: var(--fs-h2);
  color: var(--color-news-text);
  margin-bottom: var(--space-news-xl);
  position: relative;
  z-index: 1;
}

.page-news__timeline {
  position: relative;
  padding-left: var(--space-news-xl);
  z-index: 1;
}

.page-news__timeline-line {
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-news-timeline);
}

.page-news__card {
  position: relative;
  background: var(--color-news-card-bg);
  border: 1px solid var(--color-news-border);
  border-radius: var(--radius-news-card);
  padding: var(--space-news-md) var(--space-news-lg);
  margin-bottom: var(--space-news-lg);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.page-news__card:hover {
  border-color: var(--color-news-primary);
  box-shadow: 0 2px 12px rgba(0, 85, 255, 0.15);
}

.page-news__card-dot {
  position: absolute;
  left: -1.2rem;
  top: 1.25rem;
  width: 12px;
  height: 12px;
  background: var(--color-news-dot);
  border-radius: 50%;
  border: 2px solid var(--color-news-card-bg);
}

.page-news__card-time {
  display: block;
  font-family: var(--font-news-body);
  font-size: var(--fs-tiny);
  color: var(--color-news-text-secondary);
  margin-bottom: var(--space-news-sm);
  writing-mode: vertical-lr;
  position: absolute;
  left: calc(-1 * var(--space-news-xl) - 1.5rem);
  top: 1rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--color-news-timeline);
}

.page-news__card-content {
  position: relative;
}

.page-news__card-title {
  font-family: var(--font-news-heading);
  font-weight: 700;
  font-size: var(--fs-h3);
  line-height: 1.3;
  color: var(--color-news-text);
  margin: 0 0 var(--space-news-sm);
}

.page-news__card-desc {
  font-family: var(--font-news-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-news-text-secondary);
  margin: 0 0 var(--space-news-sm);
}

.page-news__card-tag {
  display: inline-block;
  font-family: var(--font-news-body);
  font-size: var(--fs-tiny);
  font-weight: 600;
  color: var(--color-news-accent);
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.page-news__card-tag:hover {
  opacity: 0.7;
}

/* 归档索引 */
.page-news__archive {
  position: relative;
  padding: var(--space-news-2xl) 0;
}

.page-news__archive-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  opacity: 0.08;
}

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

.page-news__archive-intro {
  font-family: var(--font-news-body);
  font-size: var(--fs-small);
  color: var(--color-news-text-secondary);
  margin-bottom: var(--space-news-lg);
  position: relative;
  z-index: 1;
}

.page-news__archive-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-news-sm);
  margin-bottom: var(--space-news-xl);
  position: relative;
  z-index: 1;
}

.page-news__filter-btn {
  font-family: var(--font-news-body);
  font-size: var(--fs-small);
  font-weight: 600;
  padding: var(--space-news-sm) var(--space-news-md);
  border: 1px solid var(--color-news-border);
  border-radius: var(--radius-sm);
  background: var(--color-news-card-bg);
  color: var(--color-news-text);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.page-news__filter-btn:hover,
.page-news__filter-btn[data-active="true"] {
  background: var(--color-news-primary);
  border-color: var(--color-news-primary);
  color: #fff;
}

.page-news__archive-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-news-md);
  position: relative;
  z-index: 1;
}

.page-news__archive-item {
  background: var(--color-news-card-bg);
  border: 1px solid var(--color-news-border);
  border-radius: var(--radius-news-card);
  padding: var(--space-news-lg);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.page-news__archive-item:hover {
  border-color: var(--color-news-primary);
  box-shadow: 0 2px 8px rgba(0, 85, 255, 0.1);
}

.page-news__item-title {
  font-family: var(--font-news-heading);
  font-weight: 700;
  font-size: var(--fs-body);
  line-height: 1.3;
  margin: 0 0 var(--space-news-sm);
}

.page-news__item-link {
  color: var(--color-news-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-news__item-link:hover {
  color: var(--color-news-primary);
}

.page-news__item-desc {
  font-family: var(--font-news-body);
  font-size: var(--fs-small);
  line-height: var(--lh-body);
  color: var(--color-news-text-secondary);
  margin: 0 0 var(--space-news-sm);
}

.page-news__item-tag {
  display: inline-block;
  font-family: var(--font-news-body);
  font-size: var(--fs-tiny);
  font-weight: 600;
  color: var(--color-news-accent);
}

/* 专题推荐 */
.page-news__featured {
  background: var(--color-news-bg);
  padding: var(--space-news-2xl) 0;
}

.page-news__featured-intro {
  font-family: var(--font-news-body);
  font-size: var(--fs-small);
  color: var(--color-news-text-secondary);
  margin-bottom: var(--space-news-lg);
}

.page-news__featured-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-news-lg);
}

.page-news__featured-card {
  background: var(--color-news-card-bg);
  border: 1px solid var(--color-news-border);
  border-radius: var(--radius-news-card);
  overflow: hidden;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.page-news__featured-card:hover {
  border-color: var(--color-news-primary);
  box-shadow: 0 2px 12px rgba(0, 85, 255, 0.15);
}

.page-news__featured-card-content {
  padding: var(--space-news-lg);
}

.page-news__featured-tag {
  display: inline-block;
  font-family: var(--font-news-body);
  font-size: var(--fs-tiny);
  font-weight: 600;
  color: var(--color-news-accent);
  margin-bottom: var(--space-news-sm);
}

.page-news__featured-title {
  font-family: var(--font-news-heading);
  font-weight: 700;
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  line-height: 1.3;
  color: var(--color-news-text);
  margin: 0 0 var(--space-news-sm);
}

.page-news__featured-desc {
  font-family: var(--font-news-body);
  font-size: var(--fs-small);
  line-height: var(--lh-body);
  color: var(--color-news-text-secondary);
  margin: 0 0 var(--space-news-md);
}

.page-news__featured-link {
  font-family: var(--font-news-body);
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-news-primary);
  text-decoration: none;
  transition: text-decoration var(--transition-fast);
}

.page-news__featured-link:hover {
  text-decoration: underline;
}

/* 面包屑 */
.page-news .breadcrumb {
  font-family: var(--font-news-body);
  font-size: var(--fs-tiny);
  color: var(--color-news-text-secondary);
  margin-bottom: var(--space-news-sm);
}

.page-news .breadcrumb-link {
  color: var(--color-news-primary);
  text-decoration: none;
}

.page-news .breadcrumb-link:hover {
  text-decoration: underline;
}

/* 响应式：桌面端 */
@media (min-width: 768px) {
  .page-news__archive-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-news__featured-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-news__timeline {
    padding-left: 4rem;
  }

  .page-news__card-time {
    left: calc(-4rem - 1.5rem);
    font-size: var(--fs-small);
  }

  .page-news__card-dot {
    left: -2.2rem;
    width: 14px;
    height: 14px;
  }

  .page-news__card {
    padding: var(--space-news-lg) var(--space-news-xl);
  }
}

@media (min-width: 1024px) {
  .page-news__archive-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}