/* ===== 最新动态页专属样式 ===== */
.page-news {
  --news-timeline-width: 140px;
  --news-dot-size: 14px;
  --news-line-width: 2px;
  --news-card-min-height: 320px;

  display: block;
  width: 100%;
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  padding: var(--spacing-md, 1rem) var(--spacing-lg, 1.5rem) var(--spacing-3xl, 4rem);
  color: var(--color-text-primary, #F0F4F8);
  font-family: var(--font-body, 'Inter','Microsoft YaHei',sans-serif);
}

/* 面包屑 */
.page-news .breadcrumb {
  margin-bottom: var(--spacing-xl, 2rem);
  font-size: var(--size-sm, 0.875rem);
  color: var(--color-text-secondary, #A0B0C0);
}
.page-news .breadcrumb__link {
  color: var(--color-text-secondary, #A0B0C0);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s);
}
.page-news .breadcrumb__link:hover {
  color: var(--color-accent, #FFD700);
}
.page-news .breadcrumb__sep {
  margin: 0 var(--spacing-xs, 0.25rem);
  color: var(--color-border, #3A4A5A);
}
.page-news .breadcrumb__current {
  color: var(--color-text-primary, #F0F4F8);
  font-weight: var(--weight-medium, 500);
}

/* 英雄区 */
.page-news__hero {
  margin-bottom: var(--spacing-3xl, 4rem);
  border-bottom: var(--frame-border-width, 3px) solid var(--color-accent, #FFD700);
  padding-bottom: var(--spacing-xl, 2rem);
}
.page-news__hero-title {
  font-family: var(--font-heading, 'Inter','Microsoft YaHei',sans-serif);
  font-weight: var(--weight-heading, 800);
  font-size: var(--size-4xl, 3rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 var(--spacing-md, 1rem);
  color: var(--color-text-primary, #F0F4F8);
}
.page-news__hero-desc {
  font-size: var(--size-lg, 1.25rem);
  color: var(--color-text-secondary, #A0B0C0);
  max-width: 680px;
  line-height: 1.6;
  margin: 0;
}

/* 主布局：时间线 + 内容 */
.page-news__layout {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl, 3rem);
  position: relative;
}

/* 左侧时间线 */
.page-news__timeline {
  flex-shrink: 0;
  width: 100%;
  position: relative;
  padding-left: var(--spacing-lg, 1.5rem);
}
.page-news__timeline-track {
  display: flex;
  flex-direction: row;
  gap: var(--spacing-lg, 1.5rem);
  align-items: center;
  overflow-x: auto;
  padding: var(--spacing-md, 1rem) 0;
  position: relative;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border, #3A4A5A) transparent;
}
.page-news__timeline-line {
  display: none;
}
.page-news__timeline-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs, 0.25rem);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm, 0.5rem);
  min-width: 80px;
  transition: all var(--transition-base, 0.3s);
  position: relative;
  font-family: var(--font-body, 'Inter','Microsoft YaHei',sans-serif);
}
.page-news__timeline-node:focus-visible {
  outline: 2px solid var(--color-accent, #FFD700);
  outline-offset: 4px;
  border-radius: var(--radius-md, 8px);
}
.page-news__timeline-dot {
  display: block;
  width: var(--news-dot-size);
  height: var(--news-dot-size);
  border-radius: 50%;
  background: var(--color-bg-light, #2C3A4A);
  border: var(--news-line-width) solid var(--color-border, #3A4A5A);
  transition: all var(--transition-base, 0.3s);
  position: relative;
  z-index: 2;
}
.page-news__timeline-node.is-active .page-news__timeline-dot {
  background: var(--color-accent, #FFD700);
  border-color: var(--color-accent, #FFD700);
  box-shadow: 0 0 0 4px rgba(255, 215, 0, 0.25);
}
.page-news__timeline-node:hover .page-news__timeline-dot {
  border-color: var(--color-secondary, #FF6B35);
}
.page-news__timeline-label {
  font-size: var(--size-xs, 0.75rem);
  font-weight: var(--weight-bold, 700);
  color: var(--color-text-primary, #F0F4F8);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.page-news__timeline-node.is-active .page-news__timeline-label {
  color: var(--color-accent, #FFD700);
}
.page-news__timeline-meta {
  font-size: 0.625rem;
  color: var(--color-text-secondary, #A0B0C0);
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  white-space: nowrap;
}
.page-news__timeline-node.is-active .page-news__timeline-meta {
  color: var(--color-accent-hover, #e6c200);
}
.page-news__timeline-img {
  display: none;
}

/* 右侧内容区 */
.page-news__content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3xl, 4rem);
}

/* 版本卡片 */
.page-news__version-card {
  display: none;
  flex-direction: column;
  gap: var(--spacing-lg, 1.5rem);
  padding: var(--spacing-xl, 2rem);
  background: var(--color-bg-medium, #1A2332);
  border-radius: var(--radius-lg, 12px);
  border: 1px solid var(--color-border, #3A4A5A);
  transition: all var(--transition-base, 0.3s);
  min-height: var(--news-card-min-height);
}
.page-news__version-card.is-visible {
  display: flex;
  border-color: var(--color-accent, #FFD700);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.08);
}
.page-news__version-card[data-section]:not(.is-visible) {
  display: none;
}
.page-news__card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md, 1rem);
  flex-wrap: wrap;
}
.page-news__card-title {
  font-family: var(--font-heading, 'Inter','Microsoft YaHei',sans-serif);
  font-weight: var(--weight-heading, 800);
  font-size: var(--size-xl, 1.5rem);
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--color-text-primary, #F0F4F8);
}
.page-news__card-img {
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: var(--radius-md, 8px);
  object-fit: cover;
  border: 1px solid var(--color-border, #3A4A5A);
}
.page-news__changelog {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md, 1rem);
}
.page-news__changelog-item {
  padding-left: var(--spacing-lg, 1.5rem);
  border-left: var(--news-line-width) solid var(--color-border, #3A4A5A);
  transition: border-color var(--transition-base, 0.3s);
}
.page-news__version-card.is-visible .page-news__changelog-item {
  border-left-color: var(--color-accent, #FFD700);
}
.page-news__change-label {
  display: block;
  font-family: var(--font-heading, 'Inter','Microsoft YaHei',sans-serif);
  font-weight: var(--weight-bold, 700);
  font-size: var(--size-base, 1rem);
  color: var(--color-secondary, #FF6B35);
  margin-bottom: var(--spacing-xs, 0.25rem);
}
.page-news__change-desc {
  margin: 0;
  font-size: var(--size-sm, 0.875rem);
  color: var(--color-text-secondary, #A0B0C0);
  line-height: 1.6;
}
.page-news__card-footer {
  margin-top: var(--spacing-md, 1rem);
  display: flex;
  align-items: center;
  gap: var(--spacing-md, 1rem);
  flex-wrap: wrap;
  padding-top: var(--spacing-md, 1rem);
  border-top: 1px solid var(--color-border, #3A4A5A);
}
.page-news__legacy-note {
  font-size: var(--size-xs, 0.75rem);
  color: var(--color-text-secondary, #A0B0C0);
  font-style: italic;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
}

/* 规则变更说明 */
.page-news__rules-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg, 1.5rem);
  padding: var(--spacing-2xl, 3rem) 0;
  border-top: 1px solid var(--color-border, #3A4A5A);
}
.page-news__section-title {
  font-family: var(--font-heading, 'Inter','Microsoft YaHei',sans-serif);
  font-weight: var(--weight-heading, 800);
  font-size: var(--size-2xl, 2rem);
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--color-text-primary, #F0F4F8);
}
.page-news__section-desc {
  margin: 0;
  font-size: var(--size-base, 1rem);
  color: var(--color-text-secondary, #A0B0C0);
  max-width: 600px;
  line-height: 1.6;
}
.page-news__rules-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md, 1rem);
}
.page-news__rule-item {
  padding: var(--spacing-lg, 1.5rem);
}
.page-news__rule-item .card__label {
  font-family: var(--font-heading, 'Inter','Microsoft YaHei',sans-serif);
  font-weight: var(--weight-bold, 700);
  font-size: var(--size-lg, 1.25rem);
  color: var(--color-secondary, #FF6B35);
  margin-bottom: var(--spacing-sm, 0.5rem);
  display: block;
}
.page-news__rule-text {
  margin: 0 0 var(--spacing-md, 1rem);
  font-size: var(--size-sm, 0.875rem);
  color: var(--color-text-secondary, #A0B0C0);
  line-height: 1.6;
}
.page-news__rules-img {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--radius-md, 8px);
  object-fit: cover;
  border: 1px solid var(--color-border, #3A4A5A);
  margin-top: var(--spacing-md, 1rem);
}
.page-news__rules-cta {
  margin-top: var(--spacing-md, 1rem);
}

/* 行业观察 */
.page-news__insights {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg, 1.5rem);
  padding: var(--spacing-2xl, 3rem) 0;
  border-top: 1px solid var(--color-border, #3A4A5A);
}
.page-news__insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg, 1.5rem);
}
.page-news__insight-item {
  padding: var(--spacing-xl, 2rem);
  background: var(--color-bg-medium, #1A2332);
  border-radius: var(--radius-lg, 12px);
  border: 1px solid var(--color-border, #3A4A5A);
  transition: all var(--transition-base, 0.3s);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm, 0.5rem);
}
.page-news__insight-item:hover {
  border-color: var(--color-primary, #003D7A);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 61, 122, 0.15);
}
.page-news__insight-title {
  font-family: var(--font-heading, 'Inter','Microsoft YaHei',sans-serif);
  font-weight: var(--weight-bold, 700);
  font-size: var(--size-lg, 1.25rem);
  margin: 0;
  color: var(--color-text-primary, #F0F4F8);
}
.page-news__insight-summary {
  font-size: var(--size-sm, 0.875rem);
  color: var(--color-text-secondary, #A0B0C0);
  line-height: 1.6;
  margin: 0;
}
.page-news__insight-tag {
  display: inline-block;
  font-size: var(--size-xs, 0.75rem);
  font-weight: var(--weight-medium, 500);
  color: var(--color-accent, #FFD700);
  background: rgba(255, 215, 0, 0.1);
  padding: 2px var(--spacing-sm, 0.5rem);
  border-radius: var(--radius-sm, 4px);
  align-self: flex-start;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
}
.page-news__insights-img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--radius-md, 8px);
  object-fit: cover;
  border: 1px solid var(--color-border, #3A4A5A);
  margin-top: var(--spacing-md, 1rem);
}
.page-news__insights-more {
  margin-top: var(--spacing-md, 1rem);
}

/* 底部导航 */
.page-news__foot-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg, 1.5rem);
  margin-top: var(--spacing-3xl, 4rem);
  padding-top: var(--spacing-xl, 2rem);
  border-top: 1px solid var(--color-border, #3A4A5A);
}
.page-news__foot-link {
  font-size: var(--size-sm, 0.875rem);
  color: var(--color-text-secondary, #A0B0C0);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s);
  position: relative;
}
.page-news__foot-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-accent, #FFD700);
  transform: scaleX(0);
  transition: transform var(--transition-base, 0.3s);
  transform-origin: left;
}
.page-news__foot-link:hover {
  color: var(--color-accent, #FFD700);
}
.page-news__foot-link:hover::after {
  transform: scaleX(1);
}

/* ===== 桌面端 (>= 768px) ===== */
@media (min-width: 768px) {
  .page-news {
    padding: var(--spacing-xl, 2rem) var(--spacing-2xl, 3rem) var(--spacing-3xl, 4rem);
  }
  .page-news__layout {
    flex-direction: row;
    gap: var(--spacing-2xl, 3rem);
  }
  .page-news__timeline {
    width: var(--news-timeline-width);
    flex-shrink: 0;
    padding-left: 0;
  }
  .page-news__timeline-track {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    overflow-x: visible;
    padding: 0;
    position: relative;
  }
  .page-news__timeline-line {
    display: block;
    position: absolute;
    left: 6px;
    top: 0;
    bottom: 0;
    width: var(--news-line-width);
    background: var(--color-border, #3A4A5A);
    z-index: 0;
  }
  .page-news__timeline-node {
    flex-direction: row;
    gap: var(--spacing-md, 1rem);
    min-width: unset;
    padding: var(--spacing-md, 1rem) var(--spacing-sm, 0.5rem);
    width: 100%;
    align-items: center;
  }
  .page-news__timeline-dot {
    width: 12px;
    height: 12px;
    flex-shrink: 0;
  }
  .page-news__timeline-label {
    font-size: var(--size-sm, 0.875rem);
  }
  .page-news__timeline-meta {
    font-size: 0.625rem;
  }
  .page-news__timeline-img {
    display: block;
    width: 100%;
    max-width: 100px;
    height: auto;
    margin-top: var(--spacing-lg, 1.5rem);
    object-fit: contain;
    opacity: 0.3;
    pointer-events: none;
  }
  .page-news__rules-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-news__insights-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-news__hero-title {
    font-size: var(--size-4xl, 3rem);
  }
}

/* ===== 大桌面端 (>= 1024px) ===== */
@media (min-width: 1024px) {
  .page-news {
    padding: var(--spacing-2xl, 3rem) var(--spacing-3xl, 4rem) var(--spacing-3xl, 4rem);
  }
  .page-news__hero-title {
    font-size: 3.5rem;
  }
  .page-news__timeline {
    width: 160px;
  }
}