/* ============================================
   page-news 最新动态页面专属样式
   作用域：.page-news
   移动端优先 + 桌面媒体查询
   ============================================ */

/* ---- 基础容器 ---- */
.page-news {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px 48px;
  font-family: var(--body-font, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif);
  color: var(--light-text, #FFFFFF);
  background: var(--dark-bg, #0B0C10);
}

/* ---- 面包屑 ---- */
.page-news__breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--dim-text, #B0B0B0);
  margin-bottom: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--card-border, #3E4A56);
}

.page-news__breadcrumb a {
  color: var(--accent-gold, #F4A261);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-news__breadcrumb a:hover,
.page-news__breadcrumb a:focus-visible {
  color: var(--primary-red, #E63946);
  text-decoration: underline;
}

.page-news__sep {
  color: var(--card-border, #3E4A56);
  user-select: none;
}

.page-news__breadcrumb [aria-current="page"] {
  color: var(--light-text, #FFFFFF);
  font-weight: 500;
}

/* ---- 页面标题 ---- */
.page-news__header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--primary-red, #E63946);
}

.page-news__title {
  font-family: var(--heading-font, Impact, 'Arial Black', sans-serif);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 6px;
  color: var(--light-text, #FFFFFF);
  letter-spacing: 0.02em;
}

.page-news__subtitle {
  font-size: 0.9375rem;
  color: var(--dim-text, #B0B0B0);
  margin: 0;
  letter-spacing: 0.04em;
}

/* ---- 过滤器 ---- */
.page-news__filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
  padding: 4px 0;
}

.page-news__filter-btn {
  font-family: var(--body-font, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 6px 16px;
  border: 1px solid var(--card-border, #3E4A56);
  border-radius: 20px;
  background: transparent;
  color: var(--dim-text, #B0B0B0);
  cursor: pointer;
  transition: all 0.25s ease;
  letter-spacing: 0.03em;
}

.page-news__filter-btn:hover,
.page-news__filter-btn:focus-visible {
  border-color: var(--accent-gold, #F4A261);
  color: var(--light-text, #FFFFFF);
  background: rgba(244, 162, 97, 0.08);
}

.page-news__filter-btn.is-active {
  border-color: var(--primary-red, #E63946);
  background: var(--primary-red, #E63946);
  color: var(--light-text, #FFFFFF);
}

/* ---- 通用区块标题 ---- */
.page-news__section {
  margin-bottom: 40px;
}

.page-news__section-title {
  font-family: var(--heading-font, Impact, 'Arial Black', sans-serif);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--card-border, #3E4A56);
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--light-text, #FFFFFF);
}

.page-news__section-num {
  font-size: 1.125rem;
  font-weight: 400;
  font-family: var(--mono-font, 'Courier New', Consolas, monospace);
  opacity: 0.75;
}

/* ---- 时间线容器 ---- */
.page-news__timeline {
  display: flex;
  flex-direction: column;
  gap: 28px;
  position: relative;
  padding-left: 28px;
}

/* 时间线竖线（伪元素模拟） */
.page-news__timeline::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 10px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary-red, #E63946), var(--accent-gold, #F4A261));
  border-radius: 2px;
  opacity: 0.5;
}

/* ---- 时间线项目 ---- */
.page-news__timeline-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* 时间线圆点 */
.page-news__tl-dot {
  position: absolute;
  left: -28px;
  top: 16px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--dark-bg, #0B0C10);
  border: 3px solid var(--primary-red, #E63946);
  box-shadow: 0 0 0 3px var(--dark-bg, #0B0C10);
  z-index: 2;
  flex-shrink: 0;
}

.page-news__timeline-item:hover .page-news__tl-dot,
.page-news__timeline-item:focus-within .page-news__tl-dot {
  border-color: var(--accent-gold, #F4A261);
  box-shadow: 0 0 0 3px var(--dark-bg, #0B0C10), 0 0 12px rgba(244, 162, 97, 0.35);
}

/* ---- 时间线卡片 ---- */
.page-news__tl-card {
  display: flex;
  flex-direction: column;
  background: var(--dark-surface, #1F2833);
  border: 1px solid var(--card-border, #3E4A56);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.page-news__timeline-item:hover .page-news__tl-card,
.page-news__timeline-item:focus-within .page-news__tl-card {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--accent-gold, #F4A261);
}

.page-news__tl-img-wrap {
  width: 100%;
  overflow: hidden;
  background: var(--dark-bg, #0B0C10);
  aspect-ratio: 800 / 450;
}

.page-news__tl-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.35s ease;
}

.page-news__timeline-item:hover .page-news__tl-img {
  transform: scale(1.02);
}

.page-news__tl-body {
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-news__tl-heading {
  font-family: var(--heading-font, Impact, 'Arial Black', sans-serif);
  font-size: 1.0625rem;
  font-weight: 700;
  margin: 0;
  color: var(--light-text, #FFFFFF);
  line-height: 1.3;
}

.page-news__tl-text {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--dim-text, #B0B0B0);
  margin: 0;
}

/* ---- 标签 ---- */
.page-news__tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 10px;
  border-radius: 12px;
  align-self: flex-start;
  line-height: 1.5;
}

.tag-product {
  background: rgba(230, 57, 70, 0.18);
  color: var(--primary-red, #E63946);
  border: 1px solid rgba(230, 57, 70, 0.35);
}

.tag-insight {
  background: rgba(244, 162, 97, 0.15);
  color: var(--accent-gold, #F4A261);
  border: 1px solid rgba(244, 162, 97, 0.3);
}

.tag-guide {
  background: rgba(46, 204, 113, 0.15);
  color: var(--data-green, #2ECC71);
  border: 1px solid rgba(46, 204, 113, 0.3);
}

/* ---- 特色大卡片 ---- */
.page-news__featured {
  display: flex;
  flex-direction: column;
  background: var(--dark-surface, #1F2833);
  border: 1px solid var(--card-border, #3E4A56);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 24px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  transition: box-shadow 0.3s ease, transform 0.25s ease;
}

.page-news__featured:hover,
.page-news__featured:focus-within {
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px var(--accent-gold, #F4A261);
  transform: translateY(-2px);
}

.page-news__featured-img-wrap {
  width: 100%;
  overflow: hidden;
  background: var(--dark-bg, #0B0C10);
  aspect-ratio: 800 / 450;
}

.page-news__featured-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.4s ease;
}

.page-news__featured:hover .page-news__featured-img {
  transform: scale(1.03);
}

.page-news__featured-body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-news__featured-heading {
  font-family: var(--heading-font, Impact, 'Arial Black', sans-serif);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: var(--light-text, #FFFFFF);
  line-height: 1.25;
}

.page-news__featured-text {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--dim-text, #B0B0B0);
  margin: 0;
}

.page-news__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
  padding-top: 10px;
  border-top: 1px solid var(--card-border, #3E4A56);
}

.page-news__meta-item {
  font-size: 0.75rem;
  color: var(--dim-text, #B0B0B0);
  font-family: var(--mono-font, 'Courier New', Consolas, monospace);
  letter-spacing: 0.02em;
}

/* ---- 洞察网格 ---- */
.page-news__insight-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-news__insight-card {
  display: flex;
  flex-direction: column;
  background: var(--dark-surface, #1F2833);
  border: 1px solid var(--card-border, #3E4A56);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.3s ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.page-news__insight-card:hover,
.page-news__insight-card:focus-within {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--primary-blue, #1D3557);
}

.page-news__insight-img-wrap {
  width: 100%;
  overflow: hidden;
  background: var(--dark-bg, #0B0C10);
  aspect-ratio: 600 / 400;
}

.page-news__insight-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.35s ease;
}

.page-news__insight-card:hover .page-news__insight-img {
  transform: scale(1.04);
}

.page-news__insight-body {
  padding: 14px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.page-news__insight-heading {
  font-family: var(--heading-font, Impact, 'Arial Black', sans-serif);
  font-size: 1rem;
  font-weight: 700;
  margin: 0;
  color: var(--light-text, #FFFFFF);
  line-height: 1.3;
}

.page-news__insight-text {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--dim-text, #B0B0B0);
  margin: 0;
  flex: 1;
}

.page-news__insight-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-gold, #F4A261);
  text-decoration: none;
  align-self: flex-start;
  margin-top: 4px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-news__insight-link:hover,
.page-news__insight-link:focus-visible {
  color: var(--primary-red, #E63946);
  padding-left: 4px;
  text-decoration: underline;
}

/* ---- 底部锚点导航 ---- */
.page-news__anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 16px;
  padding: 16px 0 0;
  border-top: 1px solid var(--card-border, #3E4A56);
}

.page-news__anchor-link {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--primary-blue, #1D3557);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: all 0.2s ease;
}

.page-news__anchor-link:hover,
.page-news__anchor-link:focus-visible {
  color: var(--accent-gold, #F4A261);
  border-bottom-color: var(--accent-gold, #F4A261);
}

/* ============================================
   桌面端媒体查询 (min-width: 768px)
   ============================================ */
@media (min-width: 768px) {
  .page-news {
    padding: 24px 36px 64px;
    gap: 0;
  }

  .page-news__title {
    font-size: 2.5rem;
  }

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

  .page-news__section-title {
    font-size: 1.75rem;
  }

  .page-news__timeline {
    padding-left: 40px;
    gap: 36px;
  }

  .page-news__timeline::before {
    left: 16px;
  }

  .page-news__tl-dot {
    left: -40px;
    width: 22px;
    height: 22px;
    top: 20px;
  }

  .page-news__tl-card {
    flex-direction: row;
    align-items: stretch;
  }

  .page-news__tl-img-wrap {
    width: 280px;
    min-height: 180px;
    flex-shrink: 0;
    aspect-ratio: auto;
  }

  .page-news__tl-img {
    height: 100%;
  }

  .page-news__tl-body {
    padding: 18px 22px 22px;
    justify-content: center;
  }

  .page-news__tl-heading {
    font-size: 1.125rem;
  }

  .page-news__featured {
    flex-direction: row;
    align-items: stretch;
  }

  .page-news__featured-img-wrap {
    width: 380px;
    min-height: 220px;
    flex-shrink: 0;
    aspect-ratio: auto;
  }

  .page-news__featured-img {
    height: 100%;
  }

  .page-news__featured-body {
    padding: 22px 28px 28px;
    justify-content: center;
  }

  .page-news__featured-heading {
    font-size: 1.375rem;
  }

  .page-news__insight-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .page-news__insight-card {
    flex-direction: column;
  }

  .page-news__insight-img-wrap {
    aspect-ratio: 600 / 360;
  }
}

/* ============================================
   宽桌面端 (min-width: 1024px)
   ============================================ */
@media (min-width: 1024px) {
  .page-news {
    padding: 28px 48px 80px;
  }

  .page-news__title {
    font-size: 2.75rem;
  }

  .page-news__insight-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .page-news__featured-img-wrap {
    width: 440px;
  }

  .page-news__tl-img-wrap {
    width: 320px;
  }

  .page-news__anchor-nav {
    justify-content: flex-end;
  }
}

/* ============================================
   超大屏内容宽度限制
   ============================================ */
@media (min-width: 1280px) {
  .page-news {
    padding-left: calc(48px + var(--rail-width, 200px));
  }
}