/* ===== 页面专属：page-news ===== */
.page-news {
  --tl-line-color: var(--color-primary);
  --tl-node-color: var(--color-secondary);
  --tl-node-size: 20px;
  --tl-node-primary-size: 26px;
  --tl-offset: 40px;
  --card-radius: var(--border-radius);
  --tag-bg: rgba(139, 0, 0, 0.10);
  --tag-color: var(--color-primary);
  --filter-label-bg: var(--color-glass);
  --filter-label-active: var(--color-primary);
  --card-shadow: var(--shadow-card);
  font-family: var(--font-body);
  color: var(--color-dark);
  background: var(--color-bg);
  padding: var(--space-lg) 0 var(--space-2xl);
}

/* 容器复用共享 .container，宽度限制 max-width: var(--max-width) */
.page-news .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* 面包屑 */
.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs) var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-mid);
  margin-bottom: var(--space-lg);
}
.page-news .breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-news .breadcrumb a:hover {
  color: var(--color-secondary-dim);
  text-decoration: underline;
}
.page-news .breadcrumb .separator {
  color: var(--color-light);
  font-size: 0.75rem;
}
.page-news .breadcrumb [aria-current="page"] {
  color: var(--color-dark);
  font-weight: 500;
}

/* 页面标题区 */
.page-news .page-headline {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
}
.page-news .page-subtitle {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-mid);
  max-width: 680px;
  margin-bottom: var(--space-xl);
  border-left: 3px solid var(--color-secondary);
  padding-left: var(--space-md);
}

/* ========== 时间轴容器 ========== */
.page-news .timeline {
  position: relative;
  padding-left: var(--tl-offset);
}
/* 主时间轴线（贯穿整个容器） */
.page-news .timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--tl-offset) - 0.5px);
  width: 2px;
  background: var(--tl-line-color);
  opacity: 0.45;
  border-radius: 2px;
}

/* 时间轴起点装饰 */
.page-news .timeline-start {
  position: relative;
  margin-bottom: var(--space-lg);
  display: flex;
  justify-content: flex-start;
}
.page-news .timeline-start-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-glass);
  border: 1px solid var(--color-glass-border);
  border-radius: 50%;
  width: 150px;
  height: 150px;
  overflow: hidden;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  box-shadow: var(--shadow-card);
  margin-left: calc(var(--tl-offset) * -1 + 20px);
}
.page-news .timeline-start-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* ========== 时间轴章节 (timeline-section) ========== */
.page-news .timeline-section {
  position: relative;
  margin-bottom: var(--space-xl);
  padding-left: 0;
}

/* 主节点（大金色圆点） */
.page-news .tl-node-primary {
  position: absolute;
  left: calc(var(--tl-offset) * -1 + var(--tl-node-primary-size) / 2 * -1 + 0.5px);
  top: 0.35rem;
  width: var(--tl-node-primary-size);
  height: var(--tl-node-primary-size);
  background: var(--tl-node-color);
  border: 3px solid var(--color-bg);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--tl-node-color);
  z-index: 3;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.page-news .tl-node-primary:hover {
  transform: scale(1.15);
  box-shadow: 0 0 0 4px var(--tl-node-color), 0 0 20px rgba(255, 215, 0, 0.35);
}

/* 章节内容区 */
.page-news .tl-content {
  background: transparent;
  padding: var(--space-sm) 0 var(--space-md);
  position: relative;
  z-index: 2;
}

/* 编号章节 */
.page-news .section-number {
  display: inline-block;
  font-family: var(--font-number);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: calc(var(--space-sm) * -0.5);
  letter-spacing: 0.08em;
  user-select: none;
}

/* 章节标题 */
.page-news .tl-heading {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 600;
  color: var(--color-dark);
  margin: 0 0 var(--space-md);
  letter-spacing: 0.02em;
  position: relative;
}

/* ========== 动态概览 (框景区) ========== */
.page-news .overview-stream {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}
.page-news .ov-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  background: var(--color-glass-strong);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--card-radius);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}
.page-news .ov-item:hover {
  background: rgba(255, 255, 255, 0.35);
  box-shadow: var(--shadow-hover);
}
.page-news .ov-dot {
  flex-shrink: 0;
  width: 12px;
  height: 12px;
  background: var(--tl-node-color);
  border-radius: 50%;
  margin-top: 0.45rem;
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 1px var(--tl-node-color);
  transition: transform var(--transition-fast);
}
.page-news .ov-item:hover .ov-dot {
  transform: scale(1.25);
}
.page-news .ov-body {
  flex: 1;
  min-width: 0;
}
.page-news .tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.15em 0.6em;
  border-radius: 2px;
  margin-bottom: var(--space-xs);
}
.page-news .tag-recent {
  background: var(--tag-bg);
  color: var(--tag-color);
  border: 1px solid rgba(139, 0, 0, 0.15);
}
.page-news .ov-text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-dark);
}

/* ========== 更新日志 (01) ========== */
.page-news .changelog-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-md);
}
.page-news .cl-item {
  background: var(--color-glass-strong);
  border-radius: var(--card-radius);
  border: 1px solid var(--color-glass-border);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}
.page-news .cl-item:hover {
  box-shadow: var(--shadow-hover);
}
.page-news .cl-item[open] {
  background: rgba(255, 255, 255, 0.40);
  box-shadow: var(--shadow-card);
}
.page-news .cl-summary {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  cursor: pointer;
  list-style: none;
  transition: background var(--transition-fast);
}
.page-news .cl-summary::-webkit-details-marker {
  display: none;
}
.page-news .cl-summary:hover {
  background: rgba(0, 0, 0, 0.02);
}
.page-news .cl-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-glass-border);
  background: var(--color-bg-dark);
  transition: transform var(--transition-fast);
}
.page-news .cl-item[open] .cl-icon {
  transform: scale(1.05);
}
.page-news .cl-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
.page-news .cl-version {
  font-family: var(--font-number);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-secondary-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.page-news .cl-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-dark);
  line-height: 1.4;
}
.page-news .cl-expand-icon {
  flex-shrink: 0;
  font-family: var(--font-number);
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--color-primary);
  transition: transform var(--transition-med);
  line-height: 1;
}
.page-news .cl-item[open] .cl-expand-icon {
  transform: rotate(45deg);
}
.page-news .cl-detail {
  padding: 0 var(--space-md) var(--space-md);
  border-top: 1px solid var(--color-glass-border);
  margin-top: 0;
}
.page-news .cl-detail p {
  margin: var(--space-sm) 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--color-mid);
  max-width: 620px;
}

/* ========== 行业观察 (02) ========== */
.page-news .insight-figure {
  margin: var(--space-md) 0;
  padding: 0;
  background: var(--color-glass);
  border-radius: var(--card-radius);
  border: 1px solid var(--color-glass-border);
  overflow: hidden;
  display: inline-block;
  max-width: 100%;
}
.page-news .insight-chart {
  display: block;
  width: 100%;
  height: auto;
  max-width: 600px;
  object-fit: cover;
}
.page-news .insight-caption {
  font-size: 0.8rem;
  color: var(--color-light);
  padding: var(--space-sm) var(--space-md);
  text-align: right;
  font-style: italic;
  border-top: 1px solid var(--color-glass-border);
}
.page-news .insight-body {
  margin-top: var(--space-md);
  max-width: 720px;
}
.page-news .insight-subhead {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-dark);
  margin: 0 0 var(--space-sm);
  letter-spacing: 0.02em;
}
.page-news .insight-body p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-mid);
  margin: 0 0 var(--space-sm);
}

/* ========== 内容索引 (03) ========== */
.page-news .index-filter-area {
  margin-top: var(--space-md);
}
.page-news .idx-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-glass-border);
  padding-bottom: var(--space-sm);
}
.page-news .idx-tab {
  display: inline-block;
  padding: 0.4rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-mid);
  background: var(--filter-label-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: 30px;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}
.page-news .idx-tab:hover {
  background: rgba(139, 0, 0, 0.08);
  color: var(--color-primary);
  border-color: var(--color-primary);
}
/* radio 选中态 — 标签高亮 */
#idx-all:checked ~ .idx-tabs label[for="idx-all"],
#idx-report:checked ~ .idx-tabs label[for="idx-report"],
#idx-review:checked ~ .idx-tabs label[for="idx-review"],
#idx-data:checked ~ .idx-tabs label[for="idx-data"] {
  background: var(--filter-label-active);
  color: #fff;
  border-color: var(--color-primary-dark);
  box-shadow: 0 2px 8px rgba(139, 0, 0, 0.20);
}

/* 卡片网格 */
.page-news .idx-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}
/* 默认隐藏卡片（配合 radio 切换） */
.page-news .idx-card {
  display: none;
  background: var(--color-glass-strong);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.page-news .idx-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

/* radio 切换逻辑 */
#idx-all:checked ~ .idx-grid .idx-card {
  display: flex;
  flex-direction: column;
}
#idx-report:checked ~ .idx-grid .idx-card[data-category="report"] {
  display: flex;
  flex-direction: column;
}
#idx-review:checked ~ .idx-grid .idx-card[data-category="review"] {
  display: flex;
  flex-direction: column;
}
#idx-data:checked ~ .idx-grid .idx-card[data-category="data"] {
  display: flex;
  flex-direction: column;
}

.page-news .idx-card-img-wrap {
  width: 100%;
  aspect-ratio: 1 / 1;
  max-height: 200px;
  overflow: hidden;
  background: var(--color-bg-dark);
}
.page-news .idx-card-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-med);
}
.page-news .idx-card:hover .idx-card-img {
  transform: scale(1.03);
}
.page-news .idx-card-body {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  flex: 1;
}
.page-news .idx-card-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-dark);
  margin: 0;
  letter-spacing: 0.02em;
}
.page-news .idx-card-desc {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--color-mid);
  margin: 0;
  flex: 1;
}
.page-news .idx-card-link {
  align-self: flex-start;
  margin-top: auto;
}

/* 按钮覆盖（共享 .btn 已定义基础样式） */
.page-news .btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  padding: 0.4rem 1.2rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  display: inline-block;
}
.page-news .btn-secondary:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary-dark);
}
.page-news .btn-primary {
  background: var(--color-primary);
  color: #fff;
  border: 1.5px solid var(--color-primary);
  padding: 0.5rem 1.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  display: inline-block;
}
.page-news .btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: 0 4px 12px rgba(139, 0, 0, 0.25);
}

/* 时间轴终点 */
.page-news .timeline-end {
  position: relative;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-top: var(--space-lg);
}
.page-news .timeline-end-dot {
  display: block;
  width: 14px;
  height: 14px;
  background: var(--color-light);
  border: 2px solid var(--color-bg);
  border-radius: 50%;
  box-shadow: 0 0 0 1.5px var(--color-light);
  margin-left: calc(var(--tl-offset) * -1 + 3px);
}

/* 回到顶部 */
.page-news .tl-extra-links {
  margin-top: var(--space-xl);
  text-align: center;
}
.page-news .back-to-top {
  font-family: var(--font-body);
}

/* ========== 移动端优先：窄屏优化 ========== */
@media (max-width: 640px) {
  .page-news {
    padding: var(--space-md) 0 var(--space-xl);
  }
  .page-news .container {
    padding: 0 var(--space-sm);
  }
  .page-news .timeline {
    padding-left: 32px;
  }
  .page-news .timeline::before {
    left: 14px;
  }
  .page-news .tl-node-primary {
    left: 1px;
    width: 20px;
    height: 20px;
    border-width: 2px;
    top: 0.25rem;
  }
  .page-news .timeline-start-icon {
    width: 100px;
    height: 100px;
    margin-left: -10px;
  }
  .page-news .timeline-start-img {
    width: 100px;
    height: 100px;
  }
  .page-news .section-number {
    font-size: 2rem;
  }
  .page-news .ov-item {
    padding: var(--space-sm) var(--space-md);
    flex-wrap: nowrap;
  }
  .page-news .ov-dot {
    width: 10px;
    height: 10px;
    margin-top: 0.35rem;
  }
  .page-news .cl-summary {
    flex-wrap: wrap;
    gap: var(--space-sm);
    padding: var(--space-sm);
  }
  .page-news .cl-icon {
    width: 40px;
    height: 40px;
  }
  .page-news .cl-meta {
    flex: 1 1 calc(100% - 52px);
  }
  .page-news .cl-expand-icon {
    font-size: 1.2rem;
  }
  .page-news .cl-detail {
    padding: 0 var(--space-sm) var(--space-sm);
  }
  .page-news .idx-tabs {
    gap: 0.35rem;
  }
  .page-news .idx-tab {
    padding: 0.3rem 0.9rem;
    font-size: 0.78rem;
  }
  .page-news .idx-card-img-wrap {
    max-height: 160px;
  }
  .page-news .insight-chart {
    max-width: 100%;
  }
  .page-news .page-subtitle {
    font-size: 0.92rem;
    padding-left: var(--space-sm);
  }
}

/* ========== 桌面端 ========== */
@media (min-width: 768px) {
  .page-news .container {
    padding: 0 var(--space-lg);
  }
  .page-news .timeline {
    padding-left: 60px;
  }
  .page-news .timeline::before {
    left: 28px;
  }
  .page-news .tl-node-primary {
    left: 14px;
    width: var(--tl-node-primary-size);
    height: var(--tl-node-primary-size);
    top: 0.4rem;
  }
  .page-news .timeline-start-icon {
    width: 150px;
    height: 150px;
    margin-left: calc(60px * -1 + 30px);
  }
  .page-news .timeline-start-img {
    width: 150px;
    height: 150px;
  }
  .page-news .section-number {
    font-size: 3.2rem;
  }
  .page-news .tl-heading {
    font-size: 2rem;
  }

  /* 框景区水平排列 */
  .page-news .overview-stream {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
  }
  .page-news .ov-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-lg);
  }
  .page-news .ov-dot {
    margin-top: 0;
  }

  /* 更新日志更宽 */
  .page-news .cl-summary {
    padding: var(--space-md) var(--space-lg);
  }
  .page-news .cl-icon {
    width: 56px;
    height: 56px;
  }
  .page-news .cl-detail {
    padding: 0 var(--space-lg) var(--space-lg);
  }

  /* 行业观察图文并排 */
  .page-news .insight-figure {
    float: left;
    margin-right: var(--space-lg);
    margin-bottom: var(--space-md);
    max-width: 55%;
  }
  .page-news .insight-body {
    clear: none;
  }

  /* 内容索引 2 列 */
  .page-news .idx-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-news .idx-card {
    flex-direction: row;
  }
  .page-news .idx-card-img-wrap {
    width: 180px;
    max-height: none;
    aspect-ratio: auto;
    flex-shrink: 0;
  }
  .page-news .idx-card-img {
    height: 100%;
  }
  .page-news .idx-card-body {
    padding: var(--space-md);
  }
}

@media (min-width: 1024px) {
  .page-news .idx-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-news .container {
    padding: 0 var(--space-xl);
  }
  .page-news .page-headline {
    font-size: 3.5rem;
  }
  .page-news .timeline {
    padding-left: 80px;
  }
  .page-news .timeline::before {
    left: 38px;
  }
  .page-news .tl-node-primary {
    left: 22px;
    width: 30px;
    height: 30px;
  }
  .page-news .timeline-start-icon {
    width: 180px;
    height: 180px;
    margin-left: calc(80px * -1 + 40px);
  }
  .page-news .timeline-start-img {
    width: 180px;
    height: 180px;
  }
}

/* ========== 辅助 ========== */
.page-news .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}
/* 确保所有图片响应式 */
.page-news img {
  max-width: 100%;
  height: auto;
}
/* 渐进增强：无 JS 时 details 仍可展开 */
.page-news details .cl-detail {
  display: none;
}
.page-news details[open] .cl-detail {
  display: block;
}