.page-news {
  --timeline-line-left: 16px;
  --timeline-node-size: 14px;
  --timeline-line-width: 2px;
  --card-radius: var(--radius-md);
  --cover-min-height: 360px;
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md) var(--space-2xl);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
}

/* 面包屑 */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-small);
  color: var(--color-gray);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}
.page-news .breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
  transition: opacity var(--transition);
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  opacity: 0.75;
  outline: none;
  text-decoration: underline;
}
.page-news .breadcrumb-sep {
  color: var(--color-gold);
  font-weight: var(--fw-bold);
}
.page-news .breadcrumb-current {
  color: var(--color-white);
  font-weight: var(--fw-bold);
}

/* 置顶封面 */
.page-news .timeline-cover {
  position: relative;
  min-height: var(--cover-min-height);
  border-radius: var(--card-radius);
  overflow: hidden;
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-black);
}
.page-news .cover-image-wrapper {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-news .cover-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-news .cover-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(13,13,13,0.85) 20%, rgba(0,212,255,0.25) 80%);
}
.page-news .cover-text {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
}
.page-news .cover-text h1 {
  font-family: var(--font-heading);
  font-size: var(--fs-h1);
  font-weight: var(--fw-black);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 var(--space-sm);
  line-height: 1.1;
}
.page-news .cover-text .gradient-text {
  background: var(--gradient-cyber);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-news .cover-subtitle {
  font-size: var(--fs-h3);
  color: var(--color-gray);
  letter-spacing: 0.06em;
  margin: 0;
  font-weight: var(--fw-regular);
}

/* 时间轴筛选控制 */
.page-news .timeline-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  justify-content: center;
}
.page-news .timeline-filter {
  display: inline-block;
  padding: var(--space-xs) var(--space-lg);
  font-family: var(--font-heading);
  font-size: var(--fs-caption);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray);
  background: var(--color-glass);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.page-news .timeline-filter:hover,
.page-news .timeline-filter:focus-visible {
  color: var(--color-white);
  border-color: var(--color-gold);
  background: rgba(255,215,0,0.12);
  outline: none;
}
.page-news .timeline-filter.active {
  color: var(--color-black);
  background: var(--color-gold);
  border-color: var(--color-gold);
}

/* 时间轴容器 */
.page-news .timeline {
  position: relative;
  padding-left: calc(var(--timeline-line-left) + var(--timeline-node-size) + var(--space-lg));
}
.page-news .timeline::before {
  content: '';
  position: absolute;
  left: calc(var(--timeline-line-left) + var(--timeline-node-size) / 2 - var(--timeline-line-width) / 2);
  top: 0;
  bottom: 0;
  width: var(--timeline-line-width);
  background: var(--color-gold);
  opacity: 0.35;
  border-radius: 2px;
}

/* 时间轴单项 */
.page-news .timeline-item {
  position: relative;
  margin-bottom: var(--space-xl);
}
.page-news .timeline-item:last-child {
  margin-bottom: 0;
}

/* 菱形节点 */
.page-news .timeline-node {
  position: absolute;
  left: calc(-1 * (var(--timeline-node-size) + var(--space-lg)));
  top: 28px;
  width: calc(var(--timeline-node-size) + 8px);
  height: calc(var(--timeline-node-size) + 8px);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2;
  border-radius: 2px;
  transition: transform var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.page-news .timeline-node:hover,
.page-news .timeline-node:focus-visible {
  transform: scale(1.2);
  outline: none;
}
.page-news .node-diamond {
  display: block;
  width: var(--timeline-node-size);
  height: var(--timeline-node-size);
  background: var(--gradient-cyber);
  transform: rotate(45deg);
  border: 2px solid var(--color-gold);
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(255,215,0,0.25);
  transition: box-shadow var(--transition);
}
.page-news .timeline-node:hover .node-diamond,
.page-news .timeline-node:focus-visible .node-diamond {
  box-shadow: 0 0 24px rgba(255,215,0,0.5);
}

/* 时间轴卡片 */
.page-news .timeline-content {
  background: var(--color-glass);
  border: 1px solid rgba(255,215,0,0.1);
  border-radius: var(--card-radius);
  padding: var(--space-md);
  transition: border-color var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}
.page-news .timeline-content:hover,
.page-news .timeline-content:focus-within {
  border-color: rgba(255,215,0,0.4);
  background: rgba(255,255,255,0.10);
}
.page-news .timeline-content img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  display: block;
}
.page-news .card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
}
.page-news .card-title {
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  font-weight: var(--fw-bold);
  color: var(--color-white);
  margin: 0;
  line-height: 1.2;
  flex: 1;
  min-width: 160px;
}
.page-news .card-summary {
  font-size: var(--fs-body);
  color: var(--color-gray);
  margin: 0 0 var(--space-sm);
  line-height: 1.5;
}
.page-news .card-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
  opacity: 0;
  font-size: var(--fs-body);
  color: var(--color-white);
  line-height: 1.6;
}
.page-news .card-detail p {
  margin: 0;
}
.page-news .timeline-content:hover .card-detail,
.page-news .timeline-content:focus-within .card-detail {
  max-height: 320px;
  opacity: 1;
  padding-top: var(--space-sm);
}

/* 品牌说明卡片特殊样式 —— 默认展开 */
.page-news .card-service .card-detail {
  max-height: none;
  opacity: 1;
  padding-top: var(--space-sm);
}
.page-news .service-detail .service-contact-list {
  list-style: none;
  margin: var(--space-md) 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}
.page-news .service-contact-list li {
  font-size: var(--fs-body);
  color: var(--color-gray);
  line-height: 1.5;
}
.page-news .contact-label {
  color: var(--color-gold);
  font-weight: var(--fw-bold);
  margin-right: var(--space-xs);
}
.page-news .service-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255,215,0,0.15);
}
.page-news .service-links .btn-ghost {
  color: var(--color-gold);
  border: 1px solid rgba(255,215,0,0.3);
  background: transparent;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--fs-caption);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: all var(--transition);
  display: inline-block;
}
.page-news .service-links .btn-ghost:hover,
.page-news .service-links .btn-ghost:focus-visible {
  background: rgba(255,215,0,0.12);
  border-color: var(--color-gold);
  outline: none;
}

/* 标签复用 */
.page-news .tag {
  display: inline-block;
  padding: 2px 10px;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  flex-shrink: 0;
}
.page-news .tag-cyber {
  color: var(--color-black);
  background: var(--gradient-cyber);
}
.page-news .tag-gold {
  color: var(--color-black);
  background: var(--color-gold);
}
.page-news .tag-red {
  color: var(--color-white);
  background: var(--color-red);
}

/* 响应式：移动端优先基线已完成，桌面增强 */
@media (min-width: 768px) {
  .page-news {
    padding: var(--space-xl) var(--space-xl) var(--space-2xl);
  }
  .page-news .timeline {
    padding-left: calc(var(--timeline-line-left) + var(--timeline-node-size) + var(--space-xl));
  }
  .page-news .timeline-node {
    left: calc(-1 * (var(--timeline-node-size) + var(--space-xl)));
    top: 32px;
  }
  .page-news .timeline-content {
    padding: var(--space-lg);
  }
  .page-news .timeline-content img {
    max-height: 200px;
    object-fit: cover;
  }
  .page-news .cover-text h1 {
    font-size: clamp(3.2rem, 6vw, 4.5rem);
  }
  .page-news .cover-subtitle {
    font-size: clamp(1.2rem, 2vw, 1.8rem);
  }
  .page-news .timeline-cover {
    min-height: 420px;
  }
  .page-news .timeline-controls {
    gap: var(--space-md);
  }
  .page-news .timeline-filter {
    font-size: var(--fs-body);
    padding: var(--space-sm) var(--space-xl);
  }
  .page-news .service-detail .service-contact-list {
    grid-template-columns: 1fr 1fr;
  }
  .page-news .card-title {
    font-size: var(--fs-h2);
  }
}

@media (min-width: 1024px) {
  .page-news {
    padding: var(--space-2xl) var(--space-2xl) var(--space-2xl);
  }
  .page-news .timeline {
    padding-left: calc(var(--timeline-line-left) + var(--timeline-node-size) + var(--space-2xl));
  }
  .page-news .timeline-node {
    left: calc(-1 * (var(--timeline-node-size) + var(--space-2xl)));
    top: 36px;
  }
  .page-news .timeline-content {
    padding: var(--space-xl);
  }
  .page-news .timeline-content img {
    max-height: 240px;
  }
  .page-news .timeline-cover {
    min-height: 480px;
  }
  .page-news .cover-text h1 {
    font-size: 4.5rem;
  }
  .page-news .cover-subtitle {
    font-size: 1.8rem;
  }
  .page-news .card-title {
    font-size: var(--fs-h2);
  }
  .page-news .service-detail .service-contact-list {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

/* 窄屏安全 */
@media (max-width: 480px) {
  .page-news {
    padding: var(--space-md) var(--space-sm) var(--space-xl);
  }
  .page-news .timeline {
    padding-left: calc(var(--timeline-line-left) + var(--timeline-node-size) + var(--space-md));
  }
  .page-news .timeline-node {
    left: calc(-1 * (var(--timeline-node-size) + var(--space-md)));
    top: 20px;
  }
  .page-news .timeline-content {
    padding: var(--space-sm);
  }
  .page-news .card-title {
    font-size: var(--fs-h3);
  }
  .page-news .timeline-cover {
    min-height: 260px;
  }
  .page-news .cover-text {
    padding: var(--space-md);
  }
  .page-news .cover-text h1 {
    font-size: clamp(2rem, 10vw, 2.8rem);
  }
  .page-news .cover-subtitle {
    font-size: var(--fs-body);
  }
  .page-news .timeline-controls {
    gap: var(--space-xs);
  }
  .page-news .timeline-filter {
    font-size: var(--fs-small);
    padding: var(--space-xs) var(--space-sm);
  }
  .page-news .service-links .btn-ghost {
    font-size: var(--fs-small);
    padding: var(--space-xs) var(--space-sm);
  }
}