.page-news {
  --page-gap: clamp(1rem, 2.5vw, 2rem);
  --page-side-padding: clamp(1rem, 3vw, 2.5rem);
  --card-radius: 8px;
  --card-border-color: var(--color-gold-dark, #B8860B);
  --card-bg: var(--color-bg-card, #2F2F2F);
  --card-bg-hover: var(--color-bg-card-hover, #3A3A3A);
  --sidebar-width: 280px;
  display: flex;
  flex-direction: column;
  gap: var(--page-gap);
  max-width: var(--max-width, 1200px);
  margin-inline: auto;
  padding: var(--space-md, 1rem) var(--page-side-padding) var(--space-3xl, 4rem);
  background: var(--color-bg, #0A0A0A);
  color: var(--color-text-primary, #FFFFFF);
  font-family: var(--font-body, 'Inter', sans-serif);
  font-weight: var(--fw-body, 400);
  font-size: var(--size-body, 1rem);
  line-height: 1.6;
}

/* ---------- 面包屑 ---------- */
.page-news__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4em;
  font-size: var(--size-small, 0.875rem);
  color: var(--color-text-muted, #999);
  margin-bottom: 0.25rem;
  flex-wrap: wrap;
}
.page-news__breadcrumb a {
  color: var(--color-gold-dark, #B8860B);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s);
}
.page-news__breadcrumb a:hover,
.page-news__breadcrumb a:focus-visible {
  color: var(--color-gold-bright, #FFD700);
  text-decoration: underline;
}
.page-news__breadcrumb-sep {
  color: var(--color-text-muted, #999);
}
.page-news__breadcrumb [aria-current="page"] {
  color: var(--color-text-secondary, #E0E0E0);
  font-weight: var(--fw-bold, 700);
}

/* ---------- 标题区 ---------- */
.page-news__hero {
  margin-bottom: var(--space-sm, 0.5rem);
}
.page-news__title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--fw-heading, 800);
  font-size: var(--size-h1, 2.5rem);
  letter-spacing: -0.02em;
  color: var(--color-gold-bright, #FFD700);
  margin: 0 0 0.35em;
  line-height: 1.15;
  position: relative;
  display: inline-block;
}
.page-news__title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 60px;
  height: 4px;
  background: var(--color-fire, #FF4500);
  clip-path: polygon(0 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}
.page-news__desc {
  font-size: var(--size-body, 1rem);
  color: var(--color-text-secondary, #E0E0E0);
  max-width: 680px;
  margin: var(--space-lg, 1.5rem) 0 0;
  line-height: 1.7;
}

/* ---------- 筛选栏（复用共享类） ---------- */
.page-news .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: var(--space-md, 1rem) 0 var(--space-lg, 1.5rem);
  padding: 0;
}
.page-news .filter-btn {
  background: transparent;
  border: 1.5px solid var(--color-gold-dark, #B8860B);
  color: var(--color-text-secondary, #E0E0E0);
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--fw-bold, 700);
  font-size: var(--size-small, 0.875rem);
  padding: 0.5em 1.2em;
  cursor: pointer;
  transition: all var(--transition-med, 0.35s);
  clip-path: var(--clip-cut, polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%));
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.4;
}
.page-news .filter-btn:hover,
.page-news .filter-btn:focus-visible {
  border-color: var(--color-gold-bright, #FFD700);
  color: #fff;
}
.page-news .filter-btn--active,
.page-news .filter-btn[aria-pressed="true"] {
  background: var(--color-fire, #FF4500);
  border-color: var(--color-fire, #FF4500);
  color: #fff;
}

/* ---------- 两栏布局 ---------- */
.page-news__layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl, 3rem);
}

/* ---------- 主区 ---------- */
.page-news__main {
  flex: 1;
  min-width: 0;
}
.page-news__section {
  margin-bottom: var(--space-3xl, 4rem);
}
.page-news__section:last-child {
  margin-bottom: 0;
}

/* ---------- 标题装饰 ---------- */
.page-news .section-title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--fw-heading, 800);
  font-size: var(--size-h2, 1.75rem);
  color: var(--color-gold-dark, #B8860B);
  margin: 0 0 var(--space-lg, 1.5rem);
  padding-left: 0.6em;
  border-left: 4px solid var(--color-fire, #FF4500);
  line-height: 1.3;
}

/* ---------- 卡片网格 ---------- */
.page-news__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg, 1.5rem);
}

/* ---------- 卡片 ---------- */
.page-news .card {
  --card-clip: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  background: var(--card-bg);
  border: 1px solid var(--card-border-color);
  clip-path: var(--card-clip);
  transition: background var(--transition-fast, 0.2s), transform var(--transition-fast, 0.2s), border-color var(--transition-fast, 0.2s);
  position: relative;
  overflow: hidden;
}
.page-news .card:hover,
.page-news .card:focus-within {
  background: var(--card-bg-hover);
  border-color: var(--color-gold-bright, #FFD700);
  transform: translateY(-2px);
}

/* 类别装饰条 */
.page-news .card--update {
  border-left: 4px solid var(--color-gold-dark, #B8860B);
}
.page-news .card--insight {
  border-left: 4px solid var(--color-fire, #FF4500);
}

/* 宽卡片 */
.page-news .card--wide {
  grid-column: 1 / -1;
}

/* ---------- 卡片内部 ---------- */
.page-news .card__toggle:checked ~ .card__full {
  display: block;
}
.page-news .card__toggle:checked ~ .card__preview .card__expand-arrow {
  transform: rotate(90deg);
}

.page-news .card__preview {
  padding: var(--space-lg, 1.5rem);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 0.5rem);
  position: relative;
}

.page-news .card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 0.5rem);
  margin-bottom: var(--space-xs, 0.25rem);
}

.page-news .card__title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--fw-heading, 800);
  font-size: var(--size-h3, 1.25rem);
  color: var(--color-text-primary, #FFFFFF);
  margin: 0;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-news .card__summary {
  font-size: var(--size-body, 1rem);
  color: var(--color-text-secondary, #E0E0E0);
  margin: 0;
  line-height: 1.6;
}

.page-news .card__expand-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font-size: var(--size-small, 0.875rem);
  font-weight: var(--fw-bold, 700);
  color: var(--color-gold-bright, #FFD700);
  cursor: pointer;
  transition: color var(--transition-fast, 0.2s);
  margin-top: var(--space-sm, 0.5rem);
  align-self: flex-start;
  user-select: none;
}
.page-news .card__expand-label:hover,
.page-news .card__expand-label:focus-visible {
  color: var(--color-fire, #FF4500);
}
.page-news .card__expand-arrow {
  display: inline-block;
  transition: transform var(--transition-fast, 0.2s);
  font-size: 0.8em;
}

.page-news .card__full {
  display: none;
  padding: 0 var(--space-lg, 1.5rem) var(--space-lg, 1.5rem);
  border-top: 1px solid var(--color-gray-mid, #2F2F2F);
  color: var(--color-text-secondary, #E0E0E0);
  font-size: var(--size-body, 1rem);
  line-height: 1.7;
}
.page-news .card__full p {
  margin: 0.75em 0;
}
.page-news .card__full a {
  color: var(--color-gold-bright, #FFD700);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast, 0.2s);
}
.page-news .card__full a:hover,
.page-news .card__full a:focus-visible {
  color: var(--color-fire, #FF4500);
}

/* ---------- 卡片内图片 ---------- */
.page-news .card__icon {
  width: 50px;
  height: 50px;
  object-fit: contain;
  border-radius: 4px;
  background: var(--color-gray-deep, #1A1A1A);
  flex-shrink: 0;
  margin-bottom: var(--space-sm, 0.5rem);
}
.page-news .card__thumb {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--color-gray-mid, #2F2F2F);
  flex-shrink: 0;
  margin-bottom: var(--space-sm, 0.5rem);
}
.page-news .card__chart {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 4px;
  background: var(--color-gray-deep, #1A1A1A);
  flex-shrink: 0;
  margin-bottom: var(--space-sm, 0.5rem);
}

/* ---------- 标签 ---------- */
.page-news .tag {
  display: inline-block;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--fw-bold, 700);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25em 0.7em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 3px), calc(100% - 3px) 100%, 0 100%);
  line-height: 1.3;
  color: #fff;
  background: var(--color-gray-mid, #2F2F2F);
}
.page-news .tag--update {
  background: var(--color-gold-dark, #B8860B);
}
.page-news .tag--insight {
  background: var(--color-fire, #FF4500);
}

/* ---------- 侧边栏 ---------- */
.page-news__sidebar {
  flex-shrink: 0;
  width: 100%;
}
.page-news__sidebar .section-title {
  font-size: var(--size-h3, 1.25rem);
  margin-bottom: var(--space-md, 1rem);
  padding-left: 0;
  border-left: none;
  position: relative;
  text-align: center;
  color: var(--color-gold-bright, #FFD700);
}
.page-news__sidebar .section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--color-fire, #FF4500);
  margin: 0.4em auto 0;
  clip-path: polygon(0 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
}

.page-news__sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md, 1rem);
}
.page-news__sidebar-item {
  background: var(--card-bg);
  border: 1px solid var(--color-gray-mid, #2F2F2F);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
  transition: background var(--transition-fast, 0.2s), border-color var(--transition-fast, 0.2s);
}
.page-news__sidebar-item:hover,
.page-news__sidebar-item:focus-within {
  background: var(--card-bg-hover);
  border-color: var(--color-gold-dark, #B8860B);
}
.page-news__sidebar-link {
  display: block;
  padding: var(--space-md, 1rem) var(--space-lg, 1.5rem);
  text-decoration: none;
  color: var(--color-text-primary, #FFFFFF);
}
.page-news__sidebar-link:hover,
.page-news__sidebar-link:focus-visible {
  text-decoration: none;
}
.page-news__sidebar-title {
  display: block;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: var(--fw-heading, 800);
  font-size: var(--size-body, 1rem);
  color: var(--color-gold-dark, #B8860B);
  margin-bottom: 0.25em;
  transition: color var(--transition-fast, 0.2s);
}
.page-news__sidebar-link:hover .page-news__sidebar-title,
.page-news__sidebar-link:focus-visible .page-news__sidebar-title {
  color: var(--color-gold-bright, #FFD700);
}
.page-news__sidebar-desc {
  display: block;
  font-size: var(--size-small, 0.875rem);
  color: var(--color-text-muted, #999);
  line-height: 1.5;
}

.page-news__sidebar-trust {
  margin-top: var(--space-xl, 2rem);
  padding: var(--space-md, 1rem) var(--space-lg, 1.5rem);
  background: var(--color-gray-deep, #1A1A1A);
  border-left: 3px solid var(--color-gold-dark, #B8860B);
  font-size: var(--size-small, 0.875rem);
  color: var(--color-text-muted, #999);
  line-height: 1.7;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}
.page-news__sidebar-trust p {
  margin: 0;
}

/* ---------- 隐藏辅助 ---------- */
.page-news .hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ========== 桌面端 ≥ 768px ========== */
@media (min-width: 768px) {
  .page-news__layout {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-news__main {
    flex: 1;
  }
  .page-news__sidebar {
    width: var(--sidebar-width);
    position: sticky;
    top: calc(var(--header-h, 64px) + 1rem);
  }
  .page-news__grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-news .card--wide {
    grid-column: 1 / -1;
  }
  .page-news__sidebar-list {
    gap: var(--space-sm, 0.5rem);
  }
}

/* ========== 大桌面 ≥ 1024px ========== */
@media (min-width: 1024px) {
  .page-news {
    padding-top: var(--space-xl, 2rem);
  }
  .page-news__sidebar {
    --sidebar-width: 300px;
  }
  .page-news__grid {
    gap: var(--space-xl, 2rem);
  }
}

/* ========== 移动端安全 ========== */
@media (max-width: 767px) {
  .page-news__grid {
    grid-template-columns: 1fr;
  }
  .page-news .card__preview {
    padding: var(--space-md, 1rem);
  }
  .page-news .card__full {
    padding: 0 var(--space-md, 1rem) var(--space-md, 1rem);
  }
  .page-news__sidebar-link {
    padding: var(--space-md, 1rem);
  }
}
/* 确保所有图片响应式 */
.page-news img {
  max-width: 100%;
  height: auto;
}
/* 筛选内容默认全部可见（无JS时），JS动态切换隐藏 */
.page-news [data-filter-content] {
  display: block;
}
/* 首屏主图无lazy由HTML控制，此处仅做后备 */
.page-news .card__icon {
  /* 首张卡片图标在视口内，不强制lazy */
}