.page-news {
  --toc-width: 200px;
  --content-max: 720px;
  --section-gap: 3rem;
  color: var(--text-primary);
  background: var(--bg-primary);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  padding: 1.5rem 1rem 3rem;
  max-width: var(--container-max);
  margin: 0 auto;
  position: relative;
}

/* ===== 面包屑 ===== */
.page-news .breadcrumb {
  margin-bottom: 1rem;
  font-size: var(--fs-small);
}
.page-news .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--text-secondary);
}
.page-news .breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.page-news .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--color-divider);
  font-family: var(--font-data);
}
.page-news .breadcrumb__link {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-news .breadcrumb__link:hover,
.page-news .breadcrumb__link:focus {
  color: var(--color-gold);
  outline: none;
  text-decoration: underline;
}
.page-news .breadcrumb__item[aria-current="page"] {
  color: var(--text-primary);
  font-weight: 600;
}

/* ===== 页面标题区 ===== */
.page-news__header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-divider);
  position: relative;
}
.page-news__header-label {
  display: block;
  font-family: var(--font-data);
  font-size: var(--fs-small);
  color: var(--color-gold);
  letter-spacing: 0.15em;
  margin-bottom: 0.25rem;
}
.page-news__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h1);
  font-weight: 900;
  line-height: 1.1;
  color: var(--text-primary);
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
}
.page-news__subtitle {
  font-family: var(--font-body);
  font-size: calc(var(--fs-body) * 1.1);
  color: var(--text-secondary);
  margin: 0;
  max-width: 36em;
}

/* ===== 左右布局容器 ===== */
.page-news__layout {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  position: relative;
}

/* ===== 章节目录（侧边栏） ===== */
.page-news__toc {
  flex: 0 0 var(--toc-width);
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
  max-height: calc(100vh - var(--header-height) - 3rem);
  overflow-y: auto;
  padding: 1rem 0.75rem;
  background: var(--color-glass);
  border-radius: 8px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid var(--color-divider);
}
.page-news__toc-label {
  display: block;
  font-family: var(--font-data);
  font-size: var(--fs-small);
  color: var(--color-gold);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-divider);
}
.page-news__toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-news__toc-list li {
  margin-bottom: 0.4rem;
}
.page-news__toc-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: calc(var(--fs-body) * 0.9);
  border-radius: 4px;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.page-news__toc-link:hover,
.page-news__toc-link:focus {
  background: var(--color-divider);
  color: var(--text-primary);
  outline: none;
}
.page-news__toc-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.page-news__toc-num {
  font-family: var(--font-data);
  font-size: var(--fs-small);
  color: var(--color-gold);
  min-width: 2em;
  text-align: right;
  flex-shrink: 0;
}

/* ===== 内容区 ===== */
.page-news__content {
  flex: 1;
  min-width: 0;
  max-width: var(--content-max);
}

/* ===== 章节 ===== */
.page-news__section {
  margin-bottom: var(--section-gap);
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}
.page-news__section-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.page-news__section-number {
  font-family: var(--font-data);
  font-size: var(--fs-h2);
  font-weight: 900;
  color: var(--color-gold);
  line-height: 1;
  flex-shrink: 0;
  opacity: 0.85;
}
.page-news__section-title {
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  font-weight: 900;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.page-news__section-body {
  margin-bottom: 1.5rem;
}
.page-news__text {
  margin: 0 0 1em;
  color: var(--text-secondary);
  max-width: 68ch;
}
.page-news__text:last-child {
  margin-bottom: 0;
}
.page-news__highlight {
  color: var(--text-primary);
  font-weight: 700;
}
.page-news__highlight--gold {
  color: var(--color-gold);
  font-weight: 900;
  font-family: var(--font-data);
}

/* ===== 图片区 ===== */
.page-news__figure {
  margin: 1.5rem 0 0;
  position: relative;
}
.page-news__figure--wide {
  max-width: 100%;
}
.page-news__figure--tall {
  max-width: 60%;
}
.page-news__figure-frame {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: var(--color-blue-deep);
  border: 1px solid var(--color-divider);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  /* 斜线网格装饰 */
  background-image:
    linear-gradient(45deg, var(--color-divider) 1px, transparent 1px),
    linear-gradient(-45deg, var(--color-divider) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: 0 0;
}
.page-news__image {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
  mix-blend-mode: luminosity;
  transition: mix-blend-mode var(--transition-fast), opacity var(--transition-fast);
}
.page-news__image:hover {
  mix-blend-mode: normal;
  opacity: 0.95;
}
.page-news__figcaption {
  font-size: var(--fs-small);
  color: var(--text-secondary);
  margin-top: 0.5rem;
  text-align: left;
  font-family: var(--font-data);
  letter-spacing: 0.03em;
  border-left: 2px solid var(--color-gold);
  padding-left: 0.75rem;
}

/* ===== 分隔线 ===== */
.page-news__divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.5rem 0;
  padding: 0;
}
.page-news__divider-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--color-divider), transparent);
}
.page-news__divider-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-gold);
  flex-shrink: 0;
}

/* ===== 底部CTA ===== */
.page-news__cta {
  margin-top: 1.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--color-glass);
  border-radius: 8px;
  border: 1px solid var(--color-divider);
}
.page-news__cta-text {
  margin: 0;
  color: var(--text-secondary);
}
.page-news__link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 700;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  border-bottom: 1px solid transparent;
}
.page-news__link:hover,
.page-news__link:focus {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
  outline: none;
}

/* ===== 响应式：移动端优先 ===== */
@media (max-width: 768px) {
  .page-news {
    padding: 1rem 0.75rem 2rem;
  }
  .page-news__title {
    font-size: calc(var(--fs-h1) * 0.75);
  }
  .page-news__subtitle {
    font-size: calc(var(--fs-body) * 0.95);
  }
  .page-news__layout {
    flex-direction: column;
    gap: 1.5rem;
  }
  .page-news__toc {
    position: relative;
    top: auto;
    max-height: none;
    flex: none;
    width: 100%;
    overflow-x: auto;
    padding: 0.75rem;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .page-news__toc-list {
    display: flex;
    gap: 0.5rem;
    flex-wrap: nowrap;
  }
  .page-news__toc-list li {
    margin-bottom: 0;
    flex-shrink: 0;
  }
  .page-news__toc-link {
    white-space: nowrap;
    padding: 0.4rem 0.65rem;
    font-size: calc(var(--fs-body) * 0.85);
    background: var(--color-blue-deep);
    border-radius: 20px;
    border: 1px solid var(--color-divider);
  }
  .page-news__toc-num {
    min-width: 1.5em;
    font-size: 0.75rem;
  }
  .page-news__content {
    max-width: 100%;
  }
  .page-news__section-number {
    font-size: calc(var(--fs-h2) * 0.7);
  }
  .page-news__section-title {
    font-size: calc(var(--fs-h2) * 0.7);
  }
  .page-news__figure--tall {
    max-width: 75%;
  }
  .page-news__figure-frame {
    background-size: 16px 16px;
  }
  .page-news__cta {
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .page-news__header-label {
    font-size: 0.7rem;
  }
  .page-news__title {
    font-size: calc(var(--fs-h1) * 0.6);
  }
  .page-news__section-number {
    font-size: calc(var(--fs-h2) * 0.55);
  }
  .page-news__section-title {
    font-size: calc(var(--fs-h2) * 0.55);
  }
  .page-news__figure--tall {
    max-width: 100%;
  }
  .page-news__toc-link {
    font-size: 0.75rem;
    padding: 0.3rem 0.5rem;
  }
}

/* ===== 桌面增强 ===== */
@media (min-width: 769px) {
  .page-news__toc {
    scrollbar-width: thin;
    scrollbar-color: var(--color-divider) transparent;
  }
  .page-news__toc::-webkit-scrollbar {
    width: 4px;
  }
  .page-news__toc::-webkit-scrollbar-thumb {
    background: var(--color-divider);
    border-radius: 4px;
  }
  .page-news__section-body {
    column-count: 1;
  }
  .page-news__figure--tall {
    max-width: 50%;
    margin-left: auto;
    margin-right: 0;
  }
  .page-news__figure--wide .page-news__image {
    max-height: 480px;
    object-position: center top;
  }
}

/* ===== 宽屏额外空间 ===== */
@media (min-width: 1200px) {
  .page-news {
    padding-left: 0;
    padding-right: 0;
  }
  .page-news__content {
    max-width: var(--content-max);
  }
}