.page-news {
  --news-accent: var(--color-primary);
  --news-accent-hover: #c62d39;
  --news-gold: var(--color-accent);
  --news-dark: var(--color-secondary);
  --news-bg-card: #ffffff;
  --news-bg-section: var(--color-bg-light);
  --news-border-light: var(--color-border);
  --news-text-body: var(--color-text-primary);
  --news-text-meta: var(--color-text-secondary);
  --news-font-heading: var(--font-heading);
  --news-font-body: var(--font-body);
  --news-font-mono: var(--font-mono);
  --news-radius-card: var(--radius-lg);
  --news-radius-pill: var(--radius-pill);
  --news-transition: var(--transition-base);
  --news-shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
  --news-shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.10);

  background: var(--news-bg-section);
  padding: var(--spacing-xl) 0 var(--spacing-3xl);
  font-family: var(--news-font-body);
  color: var(--news-text-body);
}

/* ---------- 面包屑 ---------- */
.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-small);
  color: var(--news-text-meta);
  margin-bottom: var(--spacing-lg);
}

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

.page-news .breadcrumb a:hover {
  color: var(--news-accent-hover);
  text-decoration: underline;
}

.page-news .breadcrumb-sep {
  margin: 0 var(--spacing-xs);
  color: var(--news-text-meta);
}

/* ---------- 页面标题 ---------- */
.page-news .page-news-header {
  margin-bottom: var(--spacing-2xl);
}

.page-news .page-news-title {
  font-family: var(--news-font-heading);
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 1.05;
  color: var(--news-dark);
  letter-spacing: -0.02em;
  margin: 0 0 var(--spacing-sm);
  text-transform: uppercase;
  position: relative;
  display: inline-block;
}

.page-news .page-news-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 80px;
  height: 5px;
  background: var(--news-accent);
  border-radius: var(--news-radius-pill);
}

.page-news .page-news-sub {
  font-size: clamp(0.95rem, 1.6vw, 1.15rem);
  color: var(--news-text-meta);
  margin: var(--spacing-lg) 0 0;
  max-width: 640px;
  line-height: 1.6;
}

/* ---------- 筛选系统 ---------- */
.page-news .page-news-filter-system {
  position: relative;
}

.page-news .filter-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-news .filter-labels {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--news-border-light);
}

.page-news .filter-label {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-lg);
  font-size: var(--font-size-small);
  font-weight: 600;
  font-family: var(--news-font-body);
  color: var(--news-text-meta);
  background: transparent;
  border: 2px solid transparent;
  border-radius: var(--news-radius-pill);
  cursor: pointer;
  transition: all var(--news-transition);
  user-select: none;
  letter-spacing: 0.02em;
}

.page-news .filter-label:hover {
  color: var(--news-accent);
  border-color: var(--news-accent);
  background: rgba(230, 57, 70, 0.05);
}

/* 选中态 — 纯CSS无JS切换 */
#page-nf-all:checked ~ .filter-labels .filter-label[for="page-nf-all"],
#page-nf-version:checked ~ .filter-labels .filter-label[for="page-nf-version"],
#page-nf-column:checked ~ .filter-labels .filter-label[for="page-nf-column"],
#page-nf-feature:checked ~ .filter-labels .filter-label[for="page-nf-feature"] {
  color: #fff;
  background: var(--news-accent);
  border-color: var(--news-accent);
}

/* ---------- 筛选隐藏逻辑 ---------- */
#page-nf-version:checked ~ .timeline .timeline-item:not([data-category="version"]),
#page-nf-column:checked ~ .timeline .timeline-item:not([data-category="column"]),
#page-nf-feature:checked ~ .timeline .timeline-item:not([data-category="feature"]) {
  display: none;
}

#page-nf-all:checked ~ .timeline .timeline-item {
  display: flex;
}

/* ---------- 时间轴 ---------- */
.page-news .timeline {
  position: relative;
  padding-left: var(--spacing-xl);
}

/* 纵向主线 */
.page-news .timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 8px;
  width: 3px;
  background: linear-gradient(to bottom, var(--news-accent), var(--news-gold), var(--news-accent));
  border-radius: var(--news-radius-pill);
  opacity: 0.4;
}

/* ---------- 分区标题 ---------- */
.page-news .timeline-section {
  margin-bottom: var(--spacing-3xl);
  position: relative;
}

.page-news .section-marker {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  padding-left: var(--spacing-lg);
}

.page-news .section-line {
  flex: 1;
  height: 2px;
  background: var(--news-accent);
  opacity: 0.25;
  max-width: 80px;
}

.page-news .section-heading {
  font-family: var(--news-font-heading);
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  color: var(--news-dark);
  margin: 0;
  white-space: nowrap;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  position: relative;
}

.page-news .section-heading::before {
  content: '◆';
  color: var(--news-accent);
  font-size: 0.6em;
  margin-right: var(--spacing-sm);
  vertical-align: middle;
}

/* ---------- 时间轴条目 ---------- */
.page-news .timeline-item {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
  position: relative;
  align-items: flex-start;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

/* 动画占位：data-animate 由JS触发 */
.page-news .timeline-item[data-animate] {
  opacity: 0;
  transform: translateY(24px);
}

.page-news .timeline-item[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 时间轴节点（左侧） ---------- */
.page-news .timeline-node {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 64px;
  padding-top: var(--spacing-sm);
  position: relative;
  z-index: 2;
}

.page-news .node-label {
  font-family: var(--news-font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--news-dark);
  background: var(--news-bg-card);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--news-accent);
  white-space: nowrap;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.06em;
  line-height: 1.2;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-news .node-dot {
  width: 14px;
  height: 14px;
  background: var(--news-accent);
  border: 3px solid var(--news-bg-card);
  border-radius: 50%;
  margin-top: var(--spacing-sm);
  box-shadow: 0 0 0 2px var(--news-accent);
  flex-shrink: 0;
}

/* ---------- 时间轴卡片 ---------- */
.page-news .timeline-card {
  flex: 1;
  min-width: 0;
  background: var(--news-bg-card);
  border-radius: var(--news-radius-card);
  box-shadow: var(--news-shadow-card);
  overflow: hidden;
  transition: box-shadow var(--news-transition), transform var(--news-transition);
  border-left: 4px solid var(--news-accent);
}

.page-news .timeline-card:hover {
  box-shadow: var(--news-shadow-card-hover);
  transform: translateY(-2px);
}

.page-news .card-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--news-border-light);
}

.page-news .card-img.banner {
  max-height: 200px;
}

.page-news .card-img.banner.slim {
  max-height: 140px;
}

.page-news .card-img.profile {
  max-width: 160px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.page-news .card-body {
  padding: var(--spacing-lg);
}

.page-news .card-tag {
  display: inline-block;
  font-size: var(--font-size-tiny);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 12px;
  border-radius: var(--news-radius-pill);
  margin-bottom: var(--spacing-sm);
  color: #fff;
}

.page-news .tag-version {
  background: var(--news-accent);
}

.page-news .tag-column {
  background: var(--news-dark);
}

.page-news .tag-feature {
  background: var(--news-gold);
  color: var(--news-dark);
}

.page-news .tag-future {
  background: var(--news-gold);
  color: var(--news-dark);
  border: 2px dashed var(--news-dark);
}

.page-news .card-title {
  font-family: var(--news-font-heading);
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  line-height: 1.25;
  color: var(--news-dark);
  margin: var(--spacing-xs) 0 var(--spacing-sm);
}

.page-news .card-desc {
  font-size: var(--font-size-body);
  color: var(--news-text-meta);
  line-height: 1.7;
  margin: 0 0 var(--spacing-sm);
}

.page-news .card-details {
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-small);
  color: var(--news-text-body);
}

.page-news .card-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--news-accent);
  transition: color var(--news-transition);
  padding: var(--spacing-xs) 0;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.page-news .card-details summary::-webkit-details-marker {
  color: var(--news-accent);
}

.page-news .card-details summary:hover {
  color: var(--news-accent-hover);
}

.page-news .details-content {
  padding: var(--spacing-md) 0 0;
  border-top: 1px solid var(--news-border-light);
  margin-top: var(--spacing-sm);
  line-height: 1.7;
}

.page-news .details-content .btn {
  margin-top: var(--spacing-sm);
}

/* 专家专栏卡片特有 — 图文并排 */
.page-news .card-column .card-column-inner {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.page-news .card-column .card-img.profile {
  width: 100%;
  max-width: 100%;
  max-height: 220px;
  object-fit: cover;
  border-radius: var(--news-radius-card) var(--news-radius-card) 0 0;
}

/* 未来计划卡片 — 金色强调 */
.page-news .card-future {
  border-left-color: var(--news-gold);
  background: linear-gradient(135deg, #fffbe6 0%, #fff 60%);
  box-shadow: var(--news-shadow-card), inset 0 0 0 1px rgba(255, 209, 102, 0.3);
}

.page-news .card-future .card-title {
  color: var(--news-dark);
}

/* ---------- 底部链接 ---------- */
.page-news .page-news-footer-links {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-lg) var(--spacing-md);
  background: var(--news-dark);
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--color-text-light);
  font-size: var(--font-size-small);
  line-height: 1.7;
}

.page-news .page-news-footer-links a {
  color: var(--news-gold);
  text-decoration: underline;
  font-weight: 600;
  transition: color var(--news-transition);
}

.page-news .page-news-footer-links a:hover {
  color: #fff;
}

/* ---------- 辅助 ---------- */
.page-news .text-small {
  font-size: var(--font-size-small);
  color: var(--news-text-meta);
}

/* ---------- 桌面端（768px 及以上） ---------- */
@media (min-width: 768px) {
  .page-news {
    padding: var(--spacing-2xl) 0 var(--spacing-3xl);
  }

  .page-news .timeline {
    padding-left: 0;
  }

  .page-news .timeline::before {
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    opacity: 0.35;
  }

  .page-news .section-marker {
    padding-left: 0;
    justify-content: center;
  }

  .page-news .section-line {
    max-width: 200px;
  }

  .page-news .section-heading {
    font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  }

  .page-news .timeline-item {
    flex-direction: row;
    align-items: flex-start;
    margin-bottom: var(--spacing-3xl);
    padding: 0;
  }

  .page-news .timeline-node {
    width: 140px;
    padding-top: var(--spacing-xl);
    align-items: center;
  }

  .page-news .node-label {
    font-size: 1.05rem;
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    min-height: auto;
    padding: 6px 16px;
    border-width: 2px;
    letter-spacing: 0.08em;
  }

  .page-news .node-dot {
    width: 18px;
    height: 18px;
    border-width: 4px;
    margin-top: var(--spacing-md);
  }

  .page-news .timeline-card {
    max-width: 740px;
    margin: 0 auto 0 0;
  }

  /* 左右交替布局 — 利用nth-child实现 */
  .page-news .timeline-item:nth-child(even) .timeline-card {
    margin: 0 0 0 auto;
  }

  .page-news .timeline-item:nth-child(even) .timeline-node {
    order: 2;
  }

  .page-news .timeline-item:nth-child(even) .timeline-card {
    order: 1;
  }

  .page-news .card-img.banner {
    max-height: 220px;
  }

  .page-news .card-img.banner.slim {
    max-height: 160px;
  }

  .page-news .card-column .card-column-inner {
    flex-direction: row;
    align-items: stretch;
  }

  .page-news .card-column .card-img.profile {
    width: 180px;
    max-height: none;
    border-radius: 0;
    object-fit: cover;
    flex-shrink: 0;
  }

  .page-news .card-column .card-body {
    flex: 1;
  }

  .page-news .filter-labels {
    flex-wrap: nowrap;
    justify-content: center;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
  }

  .page-news .filter-label {
    font-size: var(--font-size-body);
    padding: var(--spacing-xs) var(--spacing-xl);
  }

  .page-news .page-news-footer-links {
    font-size: var(--font-size-body);
    padding: var(--spacing-xl);
  }
}

/* ---------- 大屏 1024px 及以上 ---------- */
@media (min-width: 1024px) {
  .page-news .page-news-title {
    font-size: 4.4rem;
  }

  .page-news .timeline-card {
    max-width: 780px;
  }

  .page-news .card-img.banner {
    max-height: 260px;
  }

  .page-news .card-img.banner.slim {
    max-height: 180px;
  }

  .page-news .card-column .card-img.profile {
    width: 220px;
  }
}

/* ---------- 确保选中态下隐藏效果一致 ---------- */
#page-nf-all:checked ~ .timeline .timeline-item,
#page-nf-version:checked ~ .timeline .timeline-item,
#page-nf-column:checked ~ .timeline .timeline-item,
#page-nf-feature:checked ~ .timeline .timeline-item {
  display: flex;
}

/* 补充：筛选隐藏时也隐藏对应的section装饰，保留结构清爽 */
#page-nf-version:checked ~ .timeline .timeline-section[data-section="column"],
#page-nf-version:checked ~ .timeline .timeline-section[data-section="features"],
#page-nf-column:checked ~ .timeline .timeline-section[data-section="changelog"],
#page-nf-column:checked ~ .timeline .timeline-section[data-section="features"],
#page-nf-feature:checked ~ .timeline .timeline-section[data-section="changelog"],
#page-nf-feature:checked ~ .timeline .timeline-section[data-section="column"] {
  display: none;
}

/* 全部显示时所有section可见 */
#page-nf-all:checked ~ .timeline .timeline-section {
  display: block;
}

/* 确保filter-radio隐藏且不影响布局 */
.page-news .filter-radio:focus-visible + .filter-labels .filter-label[for="page-nf-all"],
.page-news .filter-radio:focus-visible + .filter-labels .filter-label[for="page-nf-version"],
.page-news .filter-radio:focus-visible + .filter-labels .filter-label[for="page-nf-column"],
.page-news .filter-radio:focus-visible + .filter-labels .filter-label[for="page-nf-feature"] {
  outline: 3px solid var(--news-accent);
  outline-offset: 2px;
}