.page-news {
  --color-primary: #0A2647;
  --color-primary-light: #1E3A5F;
  --color-accent: #FF6B35;
  --color-accent-light: #FF8C5A;
  --color-bg: #F5F7FA;
  --color-card: #FFFFFF;
  --color-text: #0A2647;
  --color-text-secondary: #4A5568;
  --color-border: #E2E8F0;
  --font-heading: 800 36px/1.1 'Inter', sans-serif;
  --font-subheading: 800 28px/1.2 'Inter', sans-serif;
  --font-body: 400 16px/1.6 'Inter', sans-serif;
  --font-mono: 500 14px/1.5 'JetBrains Mono', monospace;
  --container-max: 1280px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --shadow-card: 0 2px 8px rgba(10,38,71,0.08);
  --shadow-card-hover: 0 6px 20px rgba(10,38,71,0.12);
  --transition-base: 0.3s ease;
  display: block;
  padding: 32px 0 64px;
  background: var(--color-bg);
  font: var(--font-body);
  color: var(--color-text);
}
.page-news .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
/* 面包屑 */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.page-news .breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  border-bottom-color: var(--color-accent);
}
.page-news .breadcrumb-sep {
  color: var(--color-border);
  font-weight: 300;
}
.page-news .breadcrumb-current {
  font-weight: 600;
  color: var(--color-primary);
}
/* 页面标题区 */
.page-news .page-heading {
  margin-bottom: 24px;
}
.page-news .page-heading h1 {
  font: var(--font-heading);
  color: var(--color-primary);
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}
.page-news .page-desc {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0;
  line-height: 1.6;
}
/* 特色图 */
.page-news .log-feature-img {
  margin-bottom: 36px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: var(--color-card);
  max-height: 300px;
}
.page-news .log-hero-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  max-height: 300px;
}
/* 筛选栏 */
.page-news .filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 12px;
}
.page-news .filter-btn {
  font: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  padding: 6px 18px;
  border: 2px solid var(--color-border);
  border-radius: 20px;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  letter-spacing: 0.02em;
}
.page-news .filter-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.page-news .filter-btn.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}
.page-news .filter-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
/* 通用章节 */
.page-news .section {
  margin-bottom: 56px;
}
.page-news .section-title {
  font: var(--font-subheading);
  color: var(--color-primary);
  margin: 0 0 28px;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.01em;
}
.page-news .title-marker {
  display: inline-block;
  width: 6px;
  height: 28px;
  background: var(--color-accent);
  border-radius: 2px;
  flex-shrink: 0;
}
/* 时间线 */
.page-news .timeline-wrap {
  position: relative;
  padding-left: 24px;
}
.page-news .timeline-line {
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: var(--color-accent);
  border-radius: 2px;
  opacity: 0.35;
}
.page-news .timeline-items {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.page-news .timeline-card {
  position: relative;
  background: var(--color-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 20px 24px 20px 36px;
  transition: box-shadow var(--transition-base);
  display: block;
}
.page-news .timeline-card:hover {
  box-shadow: var(--shadow-card-hover);
}
.page-news .tlc-marker {
  position: absolute;
  left: -20px;
  top: 24px;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  border-radius: 50%;
  z-index: 1;
  box-shadow: 0 0 0 2px var(--color-accent);
}
.page-news .tlc-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-news .tlc-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.page-news .tlc-tag {
  font-size: 12px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.page-news .tag-accent {
  background: var(--color-accent);
  color: #fff;
}
.page-news .tag-outline {
  border: 1.5px solid var(--color-accent);
  color: var(--color-accent);
  background: transparent;
}
.page-news .tlc-time {
  font-size: 13px;
  color: var(--color-text-secondary);
  font-weight: 500;
}
.page-news .tlc-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0;
  line-height: 1.3;
}
.page-news .tlc-summary {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.5;
}
.page-news .tlc-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
  opacity: 0;
}
.page-news .tlc-detail p {
  font-size: 15px;
  color: var(--color-text);
  margin: 12px 0 0;
  line-height: 1.6;
  padding-top: 8px;
  border-top: 1px solid var(--color-border);
}
.page-news .tlc-toggle {
  align-self: flex-start;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 0;
  margin-top: 4px;
  transition: color var(--transition-base);
  letter-spacing: 0.02em;
}
.page-news .tlc-toggle:hover {
  color: var(--color-accent-dark, #CC552A);
}
.page-news .tlc-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.page-news .timeline-card[data-expandable][data-expanded] .tlc-detail {
  max-height: 400px;
  opacity: 1;
}
.page-news .timeline-card[data-expandable][data-expanded] .tlc-toggle::before {
  content: "收起详情";
}
.page-news .timeline-card[data-expandable] .tlc-toggle::before {
  content: "展开详情";
}
.page-news .timeline-card-img {
  padding: 0;
  overflow: hidden;
  background: transparent;
  box-shadow: none;
}
.page-news .timeline-card-img img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  max-height: 200px;
}
/* 指南卡片网格 */
.page-news .guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-news .guide-card {
  background: var(--color-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}
.page-news .guide-card:hover {
  box-shadow: var(--shadow-card-hover);
}
.page-news .guide-card-img {
  width: 100%;
  max-height: 200px;
  overflow: hidden;
  background: var(--color-primary-light);
}
.page-news .guide-card-img img {
  display: block;
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.page-news .guide-card-img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  min-height: 160px;
}
.page-news .img-placeholder-inner {
  text-align: center;
  color: var(--color-text-on-primary, #fff);
  opacity: 0.7;
}
.page-news .placeholder-icon {
  font-size: 36px;
  display: block;
  margin-bottom: 6px;
}
.page-news .img-placeholder-inner span:last-child {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.page-news .guide-card-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.page-news .guide-card-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0;
  line-height: 1.3;
}
.page-news .guide-card-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.6;
  flex: 1;
}
.page-news .guide-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-base);
  align-self: flex-start;
}
.page-news .guide-link:hover {
  gap: 8px;
}
.page-news .link-arrow {
  transition: transform var(--transition-base);
}
.page-news .guide-link:hover .link-arrow {
  transform: translateX(4px);
}
/* 行业观察卡片 */
.page-news .insight-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-news .insight-card {
  background: var(--color-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}
.page-news .insight-card:hover {
  box-shadow: var(--shadow-card-hover);
}
.page-news .insight-card-img {
  width: 100%;
  max-height: 260px;
  overflow: hidden;
}
.page-news .insight-card-img img {
  display: block;
  width: 100%;
  height: 260px;
  object-fit: cover;
}
.page-news .insight-card-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.page-news .insight-card-body-full {
  padding: 28px 24px;
}
.page-news .insight-card-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0;
  line-height: 1.3;
}
.page-news .insight-card-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.7;
}
/* 滚动显现动画 — 兼容 reduced-motion */
@media (prefers-reduced-motion: no-preference) {
  .page-news [data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .page-news [data-animate].is-visible {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .page-news [data-animate] {
    opacity: 1;
    transform: none;
  }
}
/* 标签筛选隐现 */
.page-news .timeline-card[data-filter]:not([data-filter="all"]),
.page-news .guide-card[data-filter]:not([data-filter="all"]),
.page-news .insight-card[data-filter]:not([data-filter="all"]) {
  display: block;
}
.page-news.filter-update .timeline-card[data-filter]:not([data-filter="update"]),
.page-news.filter-update .guide-card[data-filter]:not([data-filter="guide"]),
.page-news.filter-update .insight-card[data-filter]:not([data-filter="insight"]) {
  display: none;
}
.page-news.filter-guide .timeline-card[data-filter]:not([data-filter="guide"]),
.page-news.filter-guide .guide-card[data-filter]:not([data-filter="guide"]),
.page-news.filter-guide .insight-card[data-filter]:not([data-filter="insight"]) {
  display: none;
}
.page-news.filter-insight .timeline-card[data-filter]:not([data-filter="insight"]),
.page-news.filter-insight .guide-card[data-filter]:not([data-filter="guide"]),
.page-news.filter-insight .insight-card[data-filter]:not([data-filter="insight"]) {
  display: none;
}
/* 桌面端 */
@media (min-width: 768px) {
  .page-news .guide-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-news .insight-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-news .guide-card-img img {
    height: 200px;
  }
  .page-news .insight-card-img img {
    height: 260px;
  }
  .page-news .timeline-card-img img {
    max-height: 200px;
  }
  .page-news .log-feature-img {
    max-height: 300px;
  }
}
@media (min-width: 1024px) {
  .page-news {
    padding: 40px 0 80px;
  }
  .page-news .page-heading h1 {
    font-size: 42px;
  }
  .page-news .guide-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-news .insight-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-news .timeline-wrap {
    padding-left: 36px;
  }
  .page-news .timeline-line {
    left: 12px;
  }
  .page-news .tlc-marker {
    left: -30px;
    width: 18px;
    height: 18px;
  }
  .page-news .timeline-card {
    padding: 24px 32px 24px 48px;
  }
  .page-news .log-feature-img {
    max-height: 300px;
  }
}
/* 极小屏 */
@media (max-width: 480px) {
  .page-news .container {
    padding: 0 16px;
  }
  .page-news .page-heading h1 {
    font-size: 28px;
  }
  .page-news .section-title {
    font-size: 22px;
  }
  .page-news .timeline-card {
    padding: 16px 16px 16px 28px;
  }
  .page-news .tlc-marker {
    left: -16px;
    width: 12px;
    height: 12px;
  }
  .page-news .timeline-line {
    left: 6px;
  }
  .page-news .guide-card-body {
    padding: 16px;
  }
  .page-news .insight-card-body {
    padding: 16px;
  }
  .page-news .filter-btn {
    font-size: 13px;
    padding: 4px 14px;
  }
}