/* ==============================================
   page-news — 品牌更新页专属样式
   作用域限定：.page-news
   移动端优先 + 桌面增强
   ============================================== */
.page-news {
  --news-gold: #F4A261;
  --news-red: #E63946;
  --news-blue: #1D3557;
  --news-dark: #0B1A2A;
  --news-light: #F1FAEE;
  --news-card-border: linear-gradient(135deg, #E63946, #1D3557);
  --news-card-shadow: 0 6px 24px rgba(0,0,0,0.30);
  --news-card-radius: 8px;
  --news-num-font: Impact, 'Arial Black', sans-serif;
  --news-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ---------- 顶部 Hero 区域 ---------- */
.page-news__hero {
  position: relative;
  width: 100%;
  max-width: var(--max-width, 1200px);
  margin: 0 auto var(--spacing-lg, 2rem);
  border-radius: var(--news-card-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card, 0 4px 20px rgba(0,0,0,0.25));
}

.page-news__hero-image {
  display: block;
  width: 100%;
  height: auto;
  line-height: 0;
}

.page-news__hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-news__hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(230,57,70,0.75) 0%, rgba(13,27,42,0.80) 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-md, 1rem);
  text-align: center;
}

.page-news__hero-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: var(--fs-h2, 2.5rem);
  color: var(--color-text-light, #FFFFFF);
  margin: 0 0 var(--spacing-xs, 0.25rem);
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
  letter-spacing: 0.04em;
}

.page-news__hero-desc {
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: var(--fs-body, 1rem);
  color: var(--color-gold, #F4A261);
  margin: 0;
  opacity: 0.92;
  max-width: 480px;
  line-height: 1.5;
}

/* ---------- 面包屑 ---------- */
.page-news__breadcrumb {
  margin-bottom: var(--spacing-lg, 2rem);
  padding: 0;
  font-size: var(--fs-small, 0.875rem);
}

/* ---------- 主体布局：左索引 + 右内容 ---------- */
.page-news__layout {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl, 3rem);
}

/* ---------- 左侧时间轴导航 ---------- */
.page-news__timeline-nav {
  order: 1;
  background: var(--color-dark-bg, #0B1A2A);
  border-radius: var(--news-card-radius);
  padding: var(--spacing-lg, 2rem) var(--spacing-md, 1rem);
  box-shadow: var(--shadow-card);
  border-left: 4px solid var(--color-gold, #F4A261);
  flex-shrink: 0;
  width: 100%;
}

.page-news__timeline-nav-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: var(--fs-h3, 1.8rem);
  color: var(--color-text-light, #FFFFFF);
  margin: 0 0 var(--spacing-md, 1rem);
  padding-bottom: var(--spacing-sm, 0.5rem);
  border-bottom: 2px solid var(--color-gold, #F4A261);
}

.page-news__timeline-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md, 1rem);
}

.page-news__timeline-nav-item {
  margin: 0;
  padding: 0;
}

.page-news__timeline-nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm, 0.5rem);
  padding: var(--spacing-sm, 0.5rem) var(--spacing-md, 1rem);
  background: rgba(241,250,238,0.06);
  border-radius: 6px;
  text-decoration: none;
  transition: background var(--news-transition), transform var(--news-transition);
  color: var(--color-text-light, #FFFFFF);
}

.page-news__timeline-nav-link:hover,
.page-news__timeline-nav-link:focus-visible {
  background: rgba(244,162,97,0.18);
  transform: translateX(4px);
  outline: 2px solid var(--color-gold, #F4A261);
  outline-offset: 2px;
}

.page-news__timeline-nav-num {
  font-family: var(--news-num-font);
  font-size: 1.4rem;
  color: var(--color-gold, #F4A261);
  min-width: 2.2rem;
  text-align: right;
  flex-shrink: 0;
}

.page-news__timeline-nav-text {
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: var(--fs-body, 1rem);
  line-height: 1.4;
}

/* ---------- 右侧内容区 ---------- */
.page-news__content {
  order: 2;
  flex: 1;
  min-width: 0;
}

/* ---------- 区块标题 ---------- */
.page-news__section {
  margin-bottom: var(--spacing-2xl, 4rem);
}

.page-news__section-title {
  margin-bottom: var(--spacing-sm, 0.5rem);
}

.page-news__section-intro {
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: var(--fs-body, 1rem);
  color: var(--color-text-dark, #0B1A2A);
  margin: 0 0 var(--spacing-lg, 2rem);
  line-height: 1.6;
  max-width: 680px;
}

/* ---------- 更新卡片 ---------- */
.page-news__card {
  background: var(--color-light-bg, #F1FAEE);
  border-radius: var(--news-card-radius);
  padding: var(--spacing-lg, 2rem);
  margin-bottom: var(--spacing-xl, 3rem);
  box-shadow: var(--news-card-shadow);
  border: 2px solid transparent;
  background-clip: padding-box;
  position: relative;
  transition: box-shadow var(--news-transition), transform var(--news-transition);
}

.page-news__card::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--news-card-radius) + 2px);
  background: var(--news-card-border);
  z-index: -1;
  opacity: 0.7;
  transition: opacity var(--news-transition);
}

.page-news__card:hover {
  box-shadow: var(--shadow-glow-gold, 0 0 12px rgba(244,162,97,0.4));
  transform: translateY(-2px);
}

.page-news__card:hover::before {
  opacity: 1;
}

/* --- 卡片头部 --- */
.page-news__card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md, 1rem);
  margin-bottom: var(--spacing-md, 1rem);
}

.page-news__card-num-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs, 0.25rem);
  flex-shrink: 0;
}

.page-news__card-num {
  font-family: var(--news-num-font);
  font-size: 3.2rem;
  line-height: 1;
  color: var(--color-gold, #F4A261);
  text-shadow: 0 0 8px rgba(244,162,97,0.35);
  letter-spacing: -0.02em;
}

.page-news__card-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  box-shadow: 0 0 0 2px var(--color-gold, #F4A261);
}

.page-news__card-meta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs, 0.25rem);
  flex: 1;
  min-width: 0;
}

.page-news__card-date {
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: var(--fs-small, 0.875rem);
  color: var(--color-primary-blue, #1D3557);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.page-news__card-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: var(--fs-h3, 1.8rem);
  color: var(--color-text-dark, #0B1A2A);
  margin: 0;
  line-height: 1.2;
}

/* --- 卡片摘要 --- */
.page-news__card-summary {
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: var(--fs-body, 1rem);
  color: var(--color-text-dark, #0B1A2A);
  line-height: 1.6;
  margin: 0 0 var(--spacing-md, 1rem);
  padding-left: calc(48px + var(--spacing-md, 1rem) + var(--spacing-sm, 0.5rem));
}

/* --- 可折叠详情 --- */
.page-news__card-details {
  display: block;
  border-top: 1px dashed rgba(29,53,87,0.25);
  padding-top: var(--spacing-md, 1rem);
  margin-top: var(--spacing-sm, 0.5rem);
}

.page-news__card-details-summary {
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: var(--fs-body, 1rem);
  font-weight: 700;
  color: var(--color-primary-red, #E63946);
  cursor: pointer;
  padding: var(--spacing-xs, 0.25rem) 0;
  user-select: none;
  transition: color var(--news-transition);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}

.page-news__card-details-summary::-webkit-details-marker {
  display: none;
}

.page-news__card-details-summary::before {
  content: '▶';
  font-size: 0.8em;
  color: var(--color-gold, #F4A261);
  transition: transform var(--news-transition);
}

details[open] .page-news__card-details-summary::before {
  transform: rotate(90deg);
}

.page-news__card-details-summary:hover,
.page-news__card-details-summary:focus-visible {
  color: var(--color-gold, #F4A261);
  outline: none;
  text-decoration: underline;
}

.page-news__card-details-body {
  padding: var(--spacing-md, 1rem) 0 0;
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: var(--fs-body, 1rem);
  color: var(--color-text-dark, #0B1A2A);
  line-height: 1.7;
}

.page-news__card-details-body p {
  margin: 0 0 var(--spacing-md, 1rem);
}

.page-news__card-details-body p:last-child {
  margin-bottom: 0;
}

/* --- 卡片内图片 --- */
.page-news__card-image-block {
  margin: var(--spacing-md, 1rem) 0;
  border-radius: 6px;
  overflow: hidden;
  background: var(--color-dark-bg, #0B1A2A);
}

.page-news__card-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 6px 6px 0 0;
}

.page-news__card-img-caption {
  display: block;
  padding: var(--spacing-xs, 0.25rem) var(--spacing-sm, 0.5rem);
  font-size: var(--fs-small, 0.875rem);
  color: var(--color-text-light, #FFFFFF);
  background: var(--color-dark-bg, #0B1A2A);
  text-align: center;
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  opacity: 0.85;
}

/* ---------- 数据流动态抽象图 ---------- */
.page-news__motion-block {
  display: flex;
  align-items: center;
  gap: var(--spacing-md, 1rem);
  background: var(--color-dark-bg, #0B1A2A);
  border-radius: var(--news-card-radius);
  padding: var(--spacing-md, 1rem);
  margin-top: var(--spacing-xl, 3rem);
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(244,162,97,0.25);
}

.page-news__motion-img {
  width: 80px;
  height: 54px;
  border-radius: 4px;
  object-fit: cover;
  flex-shrink: 0;
}

.page-news__motion-text {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 1.1rem;
  color: var(--color-gold, #F4A261);
  margin: 0;
  letter-spacing: 0.02em;
  opacity: 0.9;
}

/* ---------- 功能索引网格 ---------- */
.page-news__index-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md, 1rem);
  margin: var(--spacing-lg, 2rem) 0;
}

.page-news__index-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md, 1rem);
  padding: var(--spacing-md, 1rem) var(--spacing-lg, 2rem);
  background: var(--color-light-bg, #F1FAEE);
  border-radius: var(--news-card-radius);
  text-decoration: none;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  transition: all var(--news-transition);
  border-left: 6px solid var(--color-primary-red, #E63946);
  position: relative;
  overflow: hidden;
}

.page-news__index-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(230,57,70,0.04));
  pointer-events: none;
}

.page-news__index-card:hover,
.page-news__index-card:focus-visible {
  transform: translateX(6px);
  box-shadow: var(--shadow-card);
  border-left-color: var(--color-gold, #F4A261);
  outline: none;
}

.page-news__index-card:focus-visible {
  outline: 2px solid var(--color-gold, #F4A261);
  outline-offset: 2px;
}

.page-news__index-letter {
  font-family: var(--news-num-font);
  font-size: 2.2rem;
  color: var(--color-primary-blue, #1D3557);
  min-width: 2.4rem;
  text-align: center;
  flex-shrink: 0;
  line-height: 1;
}

.page-news__index-name {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 1.2rem;
  color: var(--color-text-dark, #0B1A2A);
  flex-shrink: 0;
}

.page-news__index-desc {
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: var(--fs-small, 0.875rem);
  color: var(--color-primary-blue, #1D3557);
  line-height: 1.4;
  flex: 1;
  text-align: right;
  min-width: 0;
}

.page-news__index-footnote {
  font-family: var(--font-body, Georgia, 'Times New Roman', serif);
  font-size: var(--fs-small, 0.875rem);
  color: var(--color-primary-blue, #1D3557);
  margin: var(--spacing-md, 1rem) 0 0;
  font-style: italic;
  opacity: 0.8;
}

/* ==============================================
   桌面端增强 (min-width: 768px)
   ============================================== */
@media (min-width: 768px) {
  .page-news__layout {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--spacing-xl, 3rem);
  }

  .page-news__timeline-nav {
    order: 0;
    width: 240px;
    position: sticky;
    top: calc(var(--header-height, 64px) + var(--spacing-md, 1rem));
  }

  .page-news__content {
    flex: 1;
    min-width: 0;
  }

  .page-news__hero-title {
    font-size: var(--fs-h1, 3.5rem);
  }

  .page-news__hero-desc {
    font-size: 1.1rem;
  }

  .page-news__card-num {
    font-size: 4.2rem;
  }

  .page-news__card-icon {
    width: 56px;
    height: 56px;
  }

  .page-news__card-summary {
    padding-left: calc(56px + var(--spacing-lg, 2rem));
  }

  .page-news__index-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-news__motion-img {
    width: 120px;
    height: 80px;
  }

  .page-news__motion-text {
    font-size: 1.3rem;
  }
}

/* ==============================================
   大桌面端增强 (min-width: 1024px)
   ============================================== */
@media (min-width: 1024px) {
  .page-news__timeline-nav {
    width: 280px;
  }

  .page-news__card-num {
    font-size: 5rem;
  }

  .page-news__index-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-news__hero-image {
    max-height: 240px;
  }

  .page-news__hero-img {
    max-height: 240px;
    object-fit: cover;
  }
}

/* ==============================================
   极窄屏保护 (max-width: 400px)
   ============================================== */
@media (max-width: 400px) {
  .page-news__card-header {
    flex-wrap: wrap;
  }

  .page-news__card-num-wrap {
    flex-direction: row;
    gap: var(--spacing-sm, 0.5rem);
  }

  .page-news__card-num {
    font-size: 2.4rem;
  }

  .page-news__card-icon {
    width: 36px;
    height: 36px;
  }

  .page-news__card-summary {
    padding-left: 0;
  }

  .page-news__index-card {
    flex-wrap: wrap;
    gap: var(--spacing-xs, 0.25rem);
  }

  .page-news__index-desc {
    text-align: left;
    flex-basis: 100%;
  }

  .page-news__motion-block {
    flex-direction: column;
    text-align: center;
  }
}