.page-news {
  --news-gold-line: #c9a84c;
  --news-card-bg: #2a2214;
  --news-card-border: #3b3220;
  --news-error-red: #7a2e2e;
  --news-error-red-bg: rgba(122, 46, 46, 0.12);
  --news-sidebar-width: 300px;
  --news-gap: 2.5rem;
  --news-table-th-bg: #2a2214;
  --news-table-border: #3b3220;
  --news-radius: 8px;
  --news-transition: 0.3s ease;
  --news-link-hover: #d4b95a;
}

/* ===== 面包屑 ===== */
.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  padding-top: var(--space-md);
}
.page-news .breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--news-transition);
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  color: var(--news-gold-line);
}
.page-news .breadcrumb [aria-current="page"] {
  color: var(--color-text-primary);
}

/* ===== 页面头部 ===== */
.page-news__header {
  margin-bottom: var(--space-2xl);
}
.page-news__heading {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--news-gold-line);
  line-height: 1.15;
  margin: 0 0 var(--space-sm) 0;
  letter-spacing: -0.02em;
}
.page-news__subhead {
  font-family: var(--font-body);
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 680px;
  line-height: 1.6;
  margin: 0 0 var(--space-lg) 0;
}
.page-news .gold-line {
  height: 1px;
  background: linear-gradient(90deg, var(--news-gold-line), rgba(201, 168, 76, 0.15));
  width: 100%;
  margin: 0;
}

/* ===== 两栏布局 ===== */
.page-news__layout {
  display: flex;
  flex-direction: column;
  gap: var(--news-gap);
  margin-top: var(--space-xl);
}
.page-news__main {
  flex: 1 1 100%;
  min-width: 0;
}
.page-news__sidebar {
  flex: 0 0 auto;
  width: 100%;
}

/* ===== 主内容区章节通用 ===== */
.page-news__chapter {
  margin-bottom: var(--space-2xl);
  scroll-margin-top: 110px;
}
.page-news__chapter-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-md) 0;
  line-height: 1.25;
  letter-spacing: -0.01em;
  position: relative;
  padding-left: 1rem;
  border-left: 3px solid var(--news-gold-line);
}
.page-news__chapter-desc {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 720px;
  margin: 0 0 var(--space-lg) 0;
}

/* ===== 版本对照表 ===== */
.page-news__table-wrap {
  overflow-x: auto;
  margin-bottom: var(--space-lg);
  -webkit-overflow-scrolling: touch;
}
.page-news__version-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text-primary);
  background: var(--news-card-bg);
  border-radius: var(--news-radius);
  overflow: hidden;
}
.page-news__version-table thead {
  background: var(--news-table-th-bg);
  border-bottom: 2px solid var(--news-gold-line);
}
.page-news__version-table th {
  text-align: left;
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--news-gold-line);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.page-news__version-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--news-table-border);
  line-height: 1.5;
  vertical-align: top;
}
.page-news__version-table tbody tr:last-child td {
  border-bottom: none;
}
.page-news__version-table tbody tr:hover td {
  background: rgba(201, 168, 76, 0.05);
}

/* ===== 图片 ===== */
.page-news__img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--news-radius);
  object-fit: cover;
}
.page-news__img--timeline {
  width: 100%;
  max-width: 500px;
}
.page-news__img--circuit {
  width: 100%;
  max-width: 400px;
}
.page-news__img--atmosphere {
  width: 100%;
  max-width: 100%;
  height: auto;
  opacity: 0.6;
  margin-top: var(--space-lg);
}
.page-news__figure {
  margin: var(--space-lg) 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.page-news__figcaption {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
  font-style: italic;
}

/* ===== 分隔装饰 ===== */
.page-news__divider {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-lg) 0;
}
.page-news__divider-icon {
  display: block;
  width: 80px;
  height: 80px;
  opacity: 0.5;
}

/* ===== 错误模式卡片 ===== */
.page-news__error-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}
.page-news__error-card {
  background: var(--news-card-bg);
  border: 1px solid var(--news-card-border);
  border-radius: var(--news-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--news-transition), box-shadow var(--news-transition);
}
.page-news__error-card:hover {
  border-color: var(--news-gold-line);
  box-shadow: 0 4px 24px rgba(201, 168, 76, 0.08);
}
.page-news__error-icon {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-bottom: var(--space-md);
  flex-shrink: 0;
}
.page-news__error-icon--red {
  background: var(--news-error-red);
}
.page-news__error-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-sm) 0;
  line-height: 1.3;
}
.page-news__error-text {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0 0 var(--space-md) 0;
  flex: 1;
}
.page-news__error-note {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--news-gold-line);
  line-height: 1.5;
  margin: 0;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--news-card-border);
}

/* ===== 技术观测笔记 ===== */
.page-news__note {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--news-card-border);
}
.page-news__note:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}
.page-news__note-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-sm) 0;
  line-height: 1.3;
}
.page-news__note-text {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin: 0;
  max-width: 720px;
}

/* ===== 底部氛围 ===== */
.page-news__bottom-atmosphere {
  margin: var(--space-2xl) 0 0 0;
  line-height: 0;
}

/* ===== 侧边栏 ===== */
.page-news__sidebar-inner {
  background: var(--news-card-bg);
  border: 1px solid var(--news-card-border);
  border-radius: var(--news-radius);
  padding: 1.75rem 1.5rem;
  position: relative;
}
.page-news__sidebar-heading {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--news-gold-line);
  margin: 0 0 var(--space-md) 0;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 0.85rem;
}
.page-news__chapter-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-md) 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-news__chapter-link {
  display: block;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  transition: background var(--news-transition), color var(--news-transition);
  border-left: 2px solid transparent;
}
.page-news__chapter-link:hover,
.page-news__chapter-link:focus-visible {
  background: rgba(201, 168, 76, 0.08);
  color: var(--color-text-primary);
  border-left-color: var(--news-gold-line);
}
.page-news__related {
  margin: var(--space-md) 0;
}
.page-news__related-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-news__related-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  transition: background var(--news-transition), color var(--news-transition);
}
.page-news__related-link:hover,
.page-news__related-link:focus-visible {
  background: rgba(201, 168, 76, 0.08);
  color: var(--color-text-primary);
}
.page-news__link-arrow {
  display: inline-block;
  transition: transform var(--news-transition);
  color: var(--news-gold-line);
  margin-left: 0.5rem;
}
.page-news__related-link:hover .page-news__link-arrow {
  transform: translateX(4px);
}
.page-news__sidebar-note {
  margin-top: var(--space-md);
}
.page-news__sidebar-note-text {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin: 0;
  opacity: 0.8;
}
.page-news .gold-line {
  margin: var(--space-md) 0;
}

/* ===== 桌面端两栏 ===== */
@media (min-width: 1024px) {
  .page-news__heading {
    font-size: 4rem;
  }
  .page-news__layout {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-news__main {
    flex: 1 1 calc(100% - var(--news-sidebar-width) - var(--news-gap));
  }
  .page-news__sidebar {
    width: var(--news-sidebar-width);
    flex-shrink: 0;
  }
  .page-news__sidebar-inner {
    position: sticky;
    top: 110px;
  }
  .page-news__error-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-news__error-card:last-child {
    grid-column: 1 / 3;
  }
  .page-news__figure--note {
    float: right;
    margin: 0 0 var(--space-lg) var(--space-lg);
    max-width: 340px;
  }
}

@media (min-width: 1280px) {
  .page-news__error-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-news__error-card:last-child {
    grid-column: auto;
  }
  .page-news__sidebar {
    width: 320px;
  }
  .page-news__main {
    flex: 1 1 calc(100% - 320px - var(--news-gap));
  }
}

/* ===== 缩小桌面间距微调 ===== */
@media (min-width: 768px) and (max-width: 1023px) {
  .page-news__error-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-news__error-card:last-child {
    grid-column: 1 / 3;
  }
  .page-news__figure--note {
    max-width: 280px;
  }
}