/* ============================
   page-news 专属 CSS
   作用域：.page-news
   移动端优先
   ============================ */

.page-news {
  --page-news-article-bg: rgba(10, 31, 63, 0.85);
  --page-news-border-color: rgba(212, 175, 55, 0.3);
  --page-news-card-gap: 24px;
  --page-news-content-padding: 16px;
}

/* --- 面包屑 --- */
.page-news .breadcrumb {
  padding: 16px 0 0;
  margin-bottom: 8px;
}
.page-news .breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 0;
  padding: 0;
}
.page-news .breadcrumb li {
  font-size: 14px;
  color: var(--color-text-secondary, #B0C4DE);
}
.page-news .breadcrumb a {
  color: var(--color-text-secondary, #B0C4DE);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.page-news .breadcrumb a:hover {
  color: var(--color-accent1, #D4AF37);
}
.page-news .breadcrumb li[aria-current="page"] {
  color: var(--color-accent1, #D4AF37);
  font-weight: 600;
}
.page-news .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-text-secondary, #B0C4DE);
}

/* --- 标题区 --- */
.page-news__title {
  margin: 0 0 4px;
  font-size: 2rem;
  line-height: 1.1;
  word-break: break-word;
}
.page-news__subtitle {
  margin: 0 0 24px;
  font-size: 1rem;
  color: var(--color-text-secondary, #B0C4DE);
}

/* --- 网格布局：移动端单列 --- */
.page-news__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding: 0 16px 64px;
}

/* --- 文章索引（侧边栏） --- */
.article-index {
  order: 2;
  background: var(--page-news-article-bg);
  border: 1px solid var(--page-news-border-color);
  border-radius: 12px;
  padding: 24px 20px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.article-index__title {
  font-size: 1.25rem;
  margin: 0 0 16px;
  color: var(--color-accent1, #D4AF37);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.article-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.article-index__link {
  color: var(--color-text-primary, #FFFFFF);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
  display: block;
  border-left: 3px solid transparent;
}
.article-index__link:hover,
.article-index__link:focus-visible {
  background: rgba(212, 175, 55, 0.12);
  color: var(--color-accent1, #D4AF37);
  border-left-color: var(--color-accent1, #D4AF37);
}

/* --- 文章内容区 --- */
.article-content {
  order: 1;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

/* --- 章节标题 --- */
.page-news__section-title {
  font-size: 1.75rem;
  margin: 0 0 20px;
  color: var(--color-accent1, #D4AF37);
  font-weight: 700;
  letter-spacing: 0.01em;
  border-bottom: 1px solid var(--page-news-border-color);
  padding-bottom: 8px;
}

/* --- 可展开文章 --- */
.page-news__article {
  background: var(--page-news-article-bg);
  border: 1px solid var(--page-news-border-color);
  border-radius: 12px;
  overflow: hidden;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  margin-bottom: 16px;
}
.page-news__article:last-of-type {
  margin-bottom: 0;
}

.page-news__article-heading {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
}

.page-news__article-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 18px 20px;
  background: transparent;
  border: none;
  text-align: left;
  cursor: pointer;
  color: var(--color-text-primary, #FFFFFF);
  font: inherit;
  font-size: 1.05rem;
  gap: 12px;
  transition: background 0.2s;
}
.page-news__article-toggle:hover,
.page-news__article-toggle:focus-visible {
  background: rgba(212, 175, 55, 0.08);
}

.page-news__version-badge {
  display: inline-block;
  background: var(--color-accent1, #D4AF37);
  color: var(--color-primary, #0A1F3F);
  font-family: var(--font-mono, "SF Mono", monospace);
  font-weight: 700;
  font-size: 0.75rem;
  padding: 2px 10px;
  border-radius: 4px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.page-news__toggle-icon {
  margin-left: auto;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
  transition: transform 0.25s ease;
  color: var(--color-accent1, #D4AF37);
  flex-shrink: 0;
}

/* 展开状态：由 JS 切换 data-open 或 aria-expanded="true" 控制 */
.page-news__article-toggle[aria-expanded="true"] .page-news__toggle-icon {
  transform: rotate(45deg);
}

/* --- 展开内容区 --- */
.page-news__article-content {
  padding: 0 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  color: var(--color-text-secondary, #B0C4DE);
  line-height: 1.7;
  font-size: 0.95rem;
}

.page-news__article-content[hidden] {
  display: none;
}

.page-news__article-content p {
  margin: 0;
}

.page-news__article-content a {
  color: var(--color-link, #39FF14);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.page-news__article-content a:hover {
  color: var(--color-accent1, #D4AF37);
}

/* --- 图片与图表 --- */
.page-news__figure {
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  background: var(--color-bg-light, #1A2F4F);
  max-width: 100%;
}
.page-news__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  background: var(--color-bg-light, #1A2F4F);
}
.page-news__figure figcaption {
  padding: 8px 12px;
  font-size: 0.8rem;
  color: var(--color-text-secondary, #B0C4DE);
  background: rgba(0,0,0,0.15);
  border-top: 1px solid var(--page-news-border-color);
}

.page-news__figure--icon {
  width: 100px;
  margin: 0 0 16px;
  display: block;
  background: transparent;
}
.page-news__figure--icon img {
  width: 100px;
  height: 100px;
  object-fit: contain;
}

/* --- 版本归档指南 --- */
.page-news__guide {
  background: var(--page-news-article-bg);
  border: 1px solid var(--page-news-border-color);
  border-radius: 12px;
  padding: 24px 20px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.page-news__guide h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
  color: var(--color-text-primary, #FFFFFF);
  font-weight: 600;
}
.page-news__guide p {
  margin: 0 0 16px;
  line-height: 1.7;
  color: var(--color-text-secondary, #B0C4DE);
}
.page-news__guide a {
  color: var(--color-link, #39FF14);
  text-decoration: underline;
}
.page-news__guide a:hover {
  color: var(--color-accent1, #D4AF37);
}

.page-news__steps {
  margin: 0 0 16px;
  padding-left: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--color-text-secondary, #B0C4DE);
}

/* --- 相关链接 --- */
.page-news__related {
  margin-top: 16px;
  padding: 20px;
  background: var(--page-news-article-bg);
  border: 1px solid var(--page-news-border-color);
  border-radius: 12px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.page-news__related-title {
  margin: 0 0 12px;
  font-size: 1.125rem;
  color: var(--color-accent1, #D4AF37);
  font-weight: 700;
}
.page-news__related-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.page-news__related-list a {
  color: var(--color-link, #39FF14);
  text-decoration: underline;
  text-underline-offset: 2px;
  font-size: 0.95rem;
}
.page-news__related-list a:hover {
  color: var(--color-accent1, #D4AF37);
}

/* ============================
   桌面端媒体查询 ≥ 768px
   ============================ */
@media (min-width: 768px) {
  .page-news__grid {
    grid-template-columns: 260px 1fr;
    gap: 48px;
    padding: 0 32px 80px;
  }
  .article-index {
    order: 0;
    position: sticky;
    top: 88px;
    align-self: start;
  }
  .article-content {
    order: 1;
  }
  .page-news__title {
    font-size: 2.75rem;
  }
  .page-news__subtitle {
    font-size: 1.15rem;
    margin-bottom: 32px;
  }
  .page-news__section-title {
    font-size: 2rem;
  }
  .page-news__article-toggle {
    padding: 20px 24px;
    font-size: 1.1rem;
  }
  .page-news__article-content {
    padding: 0 24px 24px;
  }
  .page-news__guide {
    padding: 32px 28px;
  }
}

@media (min-width: 1024px) {
  .page-news__grid {
    grid-template-columns: 300px 1fr;
    gap: 64px;
    max-width: var(--content-max-width, 1200px);
  }
}