.page-news {
  --card-bg: rgba(10,31,61,0.7);
  --card-shadow: 0 4px 20px rgba(0,0,0,0.5);
  --insight-bg: #f0f0f0;
  --text-on-light: #333333;
}

.page-news .breadcrumb {
  padding: 1rem 1.5rem;
  font-size: 0.875rem;
  color: var(--gold);
  font-family: var(--font-body);
}
.page-news .breadcrumb a {
  color: var(--text-light);
  text-decoration: none;
  transition: color var(--transition);
}
.page-news .breadcrumb a:hover {
  color: var(--accent);
}
.page-news .breadcrumb .separator {
  margin: 0 0.25rem;
}

.page-news .page-title {
  font-family: var(--font-heading);
  font-size: 3rem;
  color: var(--text-light);
  margin: 0 1.5rem 0.5rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-news .page-desc {
  font-family: var(--font-body);
  font-size: 1.125rem;
  color: rgba(255,255,255,0.7);
  margin: 0 1.5rem 2rem;
  max-width: 600px;
}

/* 章节公共 */
.page-news .section {
  padding: 3rem 1.5rem;
}
.page-news .section-dark {
  background-color: var(--bg-dark);
}
.page-news .section-light {
  background-color: var(--insight-bg);
  color: var(--text-on-light);
}
.page-news .section-container {
  max-width: 1200px;
  margin: 0 auto;
}
.page-news .section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.page-news .section-light .section-title {
  color: var(--text-dark);
}
.page-news .section-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  color: var(--accent);
  line-height: 1;
  display: inline-block;
  min-width: 2ch;
}

/* 过滤器 */
.page-news .filter-bar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.page-news .filter-btn {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
  padding: 0.5rem 1.25rem;
  font-family: var(--font-body);
  font-weight: 600;
  cursor: pointer;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}
.page-news .filter-btn.active,
.page-news .filter-btn:hover {
  background: var(--accent);
  color: #fff;
}

/* 更新列表 */
.page-news .updates-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.page-news .update-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-news .update-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.6);
}

.page-news .card-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  pointer-events: none;
}

.page-news .toggle-detail {
  display: none;
}

.page-news .card-label {
  display: block;
  padding: 1.5rem 1.5rem 1.5rem 2.5rem;
  cursor: pointer;
  position: relative;
  z-index: 1;
}

.page-news .card-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--accent);
  display: inline-block;
  margin-right: 0.75rem;
  vertical-align: middle;
}

.page-news .card-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--text-light);
  vertical-align: middle;
}

.page-news .card-summary {
  display: block;
  font-family: var(--font-body);
  margin-top: 0.5rem;
  color: rgba(255,255,255,0.8);
  font-size: 0.95rem;
}

.page-news .expand-icon {
  position: absolute;
  right: 1.5rem;
  top: 1.5rem;
  font-size: 1.5rem;
  color: var(--gold);
  transition: transform 0.3s ease;
}

.page-news .toggle-detail:checked + .card-label .expand-icon {
  transform: rotate(45deg);
}

/* 展开详细内容 - 使用 max-height 动画 */
.page-news .card-detail {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 1.5rem;
  background: rgba(0,0,0,0.2);
}

.page-news .toggle-detail:checked ~ .card-detail {
  max-height: 500px;
  padding: 1.5rem;
}

.page-news .card-detail p {
  font-family: var(--font-body);
  color: rgba(255,255,255,0.9);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.page-news .card-detail img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--radius);
  margin-top: 1rem;
}

/* 行业观察 */
.page-news .insight-content {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: flex-start;
}

.page-news .insight-text {
  flex: 1 1 300px;
}

.page-news .section-light .insight-text p {
  color: var(--text-on-light);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.page-news .related-links {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(0,0,0,0.15);
  font-family: var(--font-body);
  font-size: 0.9rem;
}

.page-news .related-links a {
  color: var(--accent);
  text-decoration: none;
  margin: 0 0.5rem 0 0;
  transition: color var(--transition);
}
.page-news .related-links a:hover {
  text-decoration: underline;
}

.page-news .insight-image-wrapper {
  flex: 0 1 400px;
}

.page-news .insight-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}

/* 版本索引 */
.page-news .version-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-news .version-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(255,255,255,0.05);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  transition: background 0.2s ease;
}
.page-news .version-item:hover {
  background: rgba(255,255,255,0.1);
}

.page-news .version-icon {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 4px;
}

.page-news .version-info {
  display: flex;
  flex-direction: column;
}

.page-news .version-label {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--text-light);
}

.page-news .version-desc {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
}

/* 滚动显现（错峰进入） */
@media (prefers-reduced-motion: no-preference) {
  .page-news .update-card {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.6s ease forwards;
  }
  .page-news .update-card:nth-child(1) { animation-delay: 0.1s; }
  .page-news .update-card:nth-child(2) { animation-delay: 0.2s; }
  .page-news .update-card:nth-child(3) { animation-delay: 0.3s; }
  .page-news .update-card:nth-child(4) { animation-delay: 0.4s; }
  .page-news .update-card:nth-child(5) { animation-delay: 0.5s; }

  .page-news .version-item {
    opacity: 0;
    transform: translateX(-10px);
    animation: slideIn 0.4s ease forwards;
  }
  .page-news .version-item:nth-child(1) { animation-delay: 0.1s; }
  .page-news .version-item:nth-child(2) { animation-delay: 0.2s; }
  .page-news .version-item:nth-child(3) { animation-delay: 0.3s; }
  .page-news .version-item:nth-child(4) { animation-delay: 0.4s; }
}

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideIn {
  to { opacity: 1; transform: translateX(0); }
}

/* 响应式 */
@media (max-width: 768px) {
  .page-news .page-title {
    font-size: 2rem;
    margin-left: 1rem;
    margin-right: 1rem;
  }
  .page-news .page-desc {
    margin-left: 1rem;
    margin-right: 1rem;
  }
  .page-news .section {
    padding: 2rem 1rem;
  }
  .page-news .insight-content {
    flex-direction: column;
  }
  .page-news .insight-image-wrapper {
    flex: 0 1 auto;
  }
  .page-news .card-label {
    padding: 1rem 1rem 1rem 1.5rem;
  }
  .page-news .card-number {
    font-size: 1.5rem;
  }
  .page-news .card-title {
    font-size: 1.25rem;
  }
  .page-news .toggle-detail:checked ~ .card-detail {
    padding: 1rem;
  }
}