.page-news {
  --font-heading: 'Orbitron', 'Titillium Web', sans-serif;
  --font-body: 'Noto Sans SC', system-ui, sans-serif;
  --color-bg-dark: #0D0D0D;
  --color-card: #F5E6CC;
  --color-accent: #FF4500;
  --color-gold: #FFD700;
  --color-text: #FFFFFF;
  --color-text-soft: #A0A0A0;
  --content-width: 960px;
  --gap-section: 4rem;
  --gap-paragraph: 1.5rem;

  background-color: var(--color-bg-dark);
  color: var(--color-text);
  font-family: var(--font-body);
  padding: 1rem 0 4rem;
}

/* 面包屑 */
.page-news .breadcrumb {
  max-width: var(--content-width);
  margin: 0 auto 1rem;
  padding: 0 1rem;
  font-size: 0.875rem;
  color: var(--color-text-soft);
}
.page-news .breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
}
.page-news .breadcrumb a:hover {
  text-decoration: underline;
}
.page-news .breadcrumb span {
  color: var(--color-accent);
}

/* 页面标题 */
.page-news .page-title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 2.5rem;
  line-height: 1.1;
  text-transform: uppercase;
  color: var(--color-accent);
  max-width: var(--content-width);
  margin: 0 auto 0.5rem;
  padding: 0 1rem;
  letter-spacing: 0.05em;
}

.page-news .section-desc {
  max-width: var(--content-width);
  margin: 0 auto 2rem;
  padding: 0 1rem;
  font-size: 1rem;
  color: var(--color-text-soft);
  border-left: 3px solid var(--color-gold);
  padding-left: 1rem;
}

/* 筛选栏 */
.page-news .filter-bar {
  max-width: var(--content-width);
  margin: 0 auto 2.5rem;
  padding: 0 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-news .btn-filter {
  background: transparent;
  border: 1px solid var(--color-text-soft);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.4rem 1rem;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.3s, color 0.3s, border-color 0.3s;
}

.page-news .btn-filter.is-active,
.page-news .btn-filter:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* 文章块通用布局 */
.page-news .article-block {
  max-width: var(--content-width);
  margin: 0 auto 3rem;
  padding: 0 1rem;
  display: flex;
  gap: 1rem;
  position: relative;
}

/* 左侧大编号 */
.page-news .article-number {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 4rem;
  line-height: 1;
  color: var(--color-accent);
  flex-shrink: 0;
  width: 3.5rem;
  text-align: right;
  writing-mode: vertical-lr;
  rotate: 180deg;
  margin-top: 0.2rem;
  opacity: 0.6;
}

/* 右侧内容 */
.page-news .article-content {
  flex: 1;
  background: var(--color-card);
  color: #1a1a1a;
  padding: 1.5rem;
  border: 1px solid rgba(255, 69, 0, 0.3);
  box-shadow: 4px 4px 0 rgba(255, 69, 0, 0.15);
  position: relative;
}

/* 文章标题 */
.page-news .article-content h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  margin: 0 0 1rem;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

/* 主图 */
.page-news .article-hero {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-bottom: 1rem;
  border: 1px solid var(--color-gold);
}

/* 内容内图表 */
.page-news .article-chart {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 1rem 0;
  border: 1px solid var(--color-gold);
}

/* 小装饰图 */
.page-news .article-thumb {
  display: block;
  width: 150px;
  height: 150px;
  object-fit: cover;
  float: right;
  margin: 0 0 1rem 1rem;
  border: 2px solid var(--color-gold);
  shape-outside: margin-box;
}

/* 摘要 */
.page-news .article-summary {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1rem;
  clear: none;
}

/* 展开按钮 */
.page-news .btn-expand {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: 0.4rem 1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.3s, color 0.3s;
}

.page-news .btn-expand:hover {
  background: var(--color-accent);
  color: #fff;
}

.page-news .btn-expand[aria-expanded="true"] .flame-icon {
  transform: rotate(180deg);
}

.page-news .flame-icon {
  display: inline-block;
  font-size: 1.1rem;
  transition: transform 0.3s;
}

/* 展开内容 */
.page-news .expand-content[data-expanded="false"] {
  display: none;
}

.page-news .expand-content[data-expanded="true"] {
  display: block;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--color-accent);
}

.page-news .expand-content p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #333;
}

/* 阅读更多 */
.page-news .read-more {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px dotted transparent;
  transition: border-color 0.3s;
}

.page-news .read-more:hover {
  border-bottom-color: var(--color-accent);
}

/* 移动端优先：窄屏时调整 */
@media (max-width: 639px) {
  .page-news .page-title {
    font-size: 1.8rem;
  }

  .page-news .article-block {
    flex-direction: column;
    gap: 0.5rem;
  }

  .page-news .article-number {
    writing-mode: horizontal-tb;
    rotate: 0deg;
    width: auto;
    font-size: 2.5rem;
    text-align: left;
    margin-bottom: 0.25rem;
    opacity: 0.8;
  }

  .page-news .article-thumb {
    float: none;
    margin: 1rem auto;
    width: 120px;
    height: 120px;
  }

  .page-news .article-hero,
  .page-news .article-chart {
    width: 100%;
  }

  .page-news .filter-bar {
    justify-content: center;
  }

  .page-news .section-desc {
    margin-bottom: 1.5rem;
  }
}

/* 桌面端细化 */
@media (min-width: 640px) {
  .page-news .article-content {
    padding: 2rem;
  }

  .page-news .article-number {
    font-size: 5rem;
    width: 4rem;
  }

  .page-news .article-hero {
    margin-bottom: 1.5rem;
  }
}