/* =============================================
   page-news 行业观察 — 杂志式布局
   移动端优先 + 响应式网格
   作用域限定：.page-news
   ============================================= */
.page-news {
  --news-gold: #C8A96E;
  --news-blue: #3A6B8F;
  --news-orange: #FF6B35;
  --news-green: #00E676;
  --news-white: #F5F5F0;
  --news-dark: #1A1A1A;
  --news-gray: #2C2C2C;
  --news-light-bg: #FAFAF5;
  --news-card-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  --news-card-radius: 16px;
  --news-font-title: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --news-font-body: 'Inter', -apple-system, 'Helvetica Neue', Arial, sans-serif;
  --news-font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

/* ---- 容器与内边距 ---- */
.page-news__inner {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: var(--spacing-lg, 2rem) var(--spacing-md, 1rem);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl, 3rem);
}

/* ---- 页面头部 ---- */
.page-news__intro {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-sm, 0.5rem);
  border-left: 4px solid var(--news-orange);
  padding-left: var(--spacing-lg, 2rem);
}

.page-news__section-label {
  font-family: var(--news-font-mono);
  font-size: 0.8rem;
  color: var(--news-blue);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-news__heading {
  font-family: var(--news-font-title);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--news-dark);
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-news__subhead {
  font-family: var(--news-font-body);
  font-size: 1rem;
  color: var(--news-gray);
  margin: 0;
  opacity: 0.75;
  letter-spacing: 0.04em;
}

.page-news__description {
  font-family: var(--news-font-body);
  font-size: 0.95rem;
  color: var(--news-gray);
  max-width: 640px;
  margin: var(--spacing-sm, 0.5rem) 0 0 0;
  line-height: 1.6;
}

/* ---- 索引导航条 ---- */
.page-news__index-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-md, 1rem);
  padding: var(--spacing-md, 1rem) 0;
  border-top: 1px solid rgba(58, 107, 143, 0.15);
  border-bottom: 1px solid rgba(58, 107, 143, 0.15);
}

.page-news__index-label {
  font-family: var(--news-font-mono);
  font-size: 0.75rem;
  color: var(--news-blue);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.page-news__index-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm, 0.5rem) var(--spacing-md, 1rem);
}

.page-news__index-link {
  font-family: var(--news-font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--news-gray);
  text-decoration: none;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.25s ease, color 0.25s ease;
}

.page-news__index-link:hover,
.page-news__index-link:focus {
  color: var(--news-orange);
  border-bottom-color: var(--news-orange);
}

/* ---- 章节通用 ---- */
.page-news__section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg, 2rem);
}

.page-news__section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--spacing-sm, 0.5rem) var(--spacing-md, 1rem);
}

.page-news__section-number {
  font-family: var(--news-font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--news-blue);
  opacity: 0.3;
  line-height: 1;
}

.page-news__section-title {
  font-family: var(--news-font-title);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--news-dark);
  margin: 0;
  letter-spacing: -0.01em;
}

.page-news__section-tag {
  font-family: var(--news-font-body);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--news-white);
  background: var(--news-orange);
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  line-height: 1.4;
  align-self: center;
}

/* ---- 卡片网格 ---- */
.page-news__card-grid {
  display: grid;
  gap: var(--spacing-lg, 2rem);
}

.page-news__card-grid--single {
  grid-template-columns: 1fr;
}

.page-news__card-grid--double {
  grid-template-columns: 1fr;
}

/* ---- 卡片 ---- */
.page-news__card {
  background: var(--news-white);
  border-radius: var(--news-card-radius);
  box-shadow: var(--news-card-shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-news__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.page-news__card--feature {
  border-left: 4px solid var(--news-orange);
}

.page-news__card--alt {
  border-left: 4px solid var(--news-blue);
}

.page-news__card--wide {
  border-left: 4px solid var(--news-green);
  flex-direction: column;
}

.page-news__card-image-wrap {
  width: 100%;
  overflow: hidden;
  background: var(--news-light-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
}

.page-news__card-image-wrap--wide {
  min-height: 120px;
}

.page-news__card-image {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  object-position: center;
}

.page-news__card-image--icon {
  width: 80px;
  height: 80px;
  object-fit: contain;
  padding: var(--spacing-md, 1rem);
}

.page-news__card-body {
  padding: var(--spacing-lg, 2rem);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm, 0.5rem);
  flex: 1;
}

.page-news__card-time {
  font-family: var(--news-font-mono);
  font-size: 0.75rem;
  color: var(--news-blue);
  opacity: 0.7;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.page-news__card-title {
  font-family: var(--news-font-title);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--news-dark);
  margin: 0;
  line-height: 1.25;
}

.page-news__card-text {
  font-family: var(--news-font-body);
  font-size: 0.95rem;
  color: var(--news-gray);
  line-height: 1.65;
  margin: var(--spacing-xs, 0.25rem) 0 0 0;
}

.page-news__card-list {
  list-style: none;
  padding: 0;
  margin: var(--spacing-sm, 0.5rem) 0 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-news__card-list li {
  font-family: var(--news-font-body);
  font-size: 0.9rem;
  color: var(--news-gray);
  padding-left: 1.2rem;
  position: relative;
}

.page-news__card-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--news-orange);
  font-weight: 700;
}

/* ---- 相关栏目 ---- */
.page-news__related {
  border-top: 2px solid rgba(58, 107, 143, 0.2);
  padding-top: var(--spacing-lg, 2rem);
  margin-top: var(--spacing-md, 1rem);
}

.page-news__related-title {
  font-family: var(--news-font-title);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--news-dark);
  margin: 0 0 var(--spacing-md, 1rem) 0;
}

.page-news__related-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md, 1rem) var(--spacing-lg, 2rem);
}

.page-news__related-link {
  font-family: var(--news-font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--news-blue);
  text-decoration: none;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.25s ease, color 0.25s ease;
}

.page-news__related-link:hover,
.page-news__related-link:focus {
  color: var(--news-orange);
  border-bottom-color: var(--news-orange);
}

/* =============================================
   响应式 — 平板 (≥ 640px)
   ============================================= */
@media (min-width: 640px) {
  .page-news__heading {
    font-size: 3.2rem;
  }

  .page-news__card-grid--double {
    grid-template-columns: 1fr 1fr;
  }

  .page-news__card--wide {
    flex-direction: row;
  }

  .page-news__card--wide .page-news__card-image-wrap {
    min-width: 280px;
    max-width: 280px;
    min-height: auto;
  }

  .page-news__card-image--icon {
    width: 100px;
    height: 100px;
  }

  .page-news__card-body {
    padding: var(--spacing-lg, 2rem) var(--spacing-xl, 3rem);
  }

  .page-news__index-bar {
    padding: var(--spacing-lg, 2rem) 0;
  }
}

/* =============================================
   响应式 — 桌面 (≥ 960px)
   ============================================= */
@media (min-width: 960px) {
  .page-news__inner {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: var(--spacing-xl, 3rem);
    padding: var(--spacing-xl, 3rem) var(--spacing-lg, 2rem);
  }

  .page-news__intro {
    grid-column: 1 / 2;
    border-left: none;
    border-top: 4px solid var(--news-orange);
    padding-left: 0;
    padding-top: var(--spacing-md, 1rem);
  }

  .page-news__heading {
    font-size: 3.6rem;
  }

  .page-news__description {
    font-size: 1rem;
  }

  .page-news__index-bar {
    grid-column: 1 / 2;
    flex-direction: column;
    align-items: flex-start;
    border-top: none;
    border-bottom: none;
    padding: 0;
    gap: var(--spacing-sm, 0.5rem);
  }

  .page-news__index-nav {
    flex-direction: column;
    gap: var(--spacing-xs, 0.25rem);
  }

  .page-news__index-link {
    font-size: 1rem;
    padding: 0.35rem 0;
  }

  .page-news__section {
    grid-column: 2 / 3;
  }

  .page-news__section-title {
    font-size: 2rem;
  }

  .page-news__card-title {
    font-size: 1.4rem;
  }

  .page-news__related {
    grid-column: 1 / -1;
    margin-top: 0;
  }

  .page-news__card--wide .page-news__card-image-wrap {
    min-width: 320px;
    max-width: 320px;
  }
}

/* =============================================
   响应式 — 大桌面 (≥ 1200px)
   ============================================= */
@media (min-width: 1200px) {
  .page-news__heading {
    font-size: 4rem;
  }

  .page-news__card-grid--double {
    gap: var(--spacing-xl, 3rem);
  }

  .page-news__card--wide .page-news__card-image-wrap {
    min-width: 360px;
    max-width: 360px;
  }

  .page-news__card-body {
    padding: var(--spacing-xl, 3rem);
  }
}

/* =============================================
   无障碍与精简交互
   ============================================= */
.page-news__index-link:focus-visible,
.page-news__related-link:focus-visible {
  outline: 2px solid var(--news-orange);
  outline-offset: 2px;
  border-radius: 2px;
}

.page-news__card:focus-within {
  box-shadow: 0 0 0 3px var(--news-blue);
}

/* 平滑滚动（渐进增强） */
@media (prefers-reduced-motion: no-preference) {
  .page-news__card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .page-news__index-link,
  .page-news__related-link {
    transition: border-color 0.25s ease, color 0.25s ease;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news__card,
  .page-news__index-link,
  .page-news__related-link {
    transition: none;
  }

  .page-news__card:hover {
    transform: none;
  }
}