.page-news {
  --news-bg: #0B1A2E;
  --news-card: #1A2D44;
  --news-primary: #00FF88;
  --news-accent: #FF6B35;
  --news-text: #E0E6ED;
  --news-text-secondary: #8899AA;
  --news-glass: rgba(255,255,255,0.08);
  --news-border: rgba(255,255,255,0.1);
  --news-primary-dim: rgba(0,255,136,0.15);
  --news-accent-dim: rgba(255,107,53,0.15);
  --news-timeline-width: 60px;
  --news-transition: 0.35s ease-out;

  position: relative;
  min-height: 100vh;
  background: var(--news-bg);
  color: var(--news-text);
  font-family: "Inter","Helvetica Neue",Arial,sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---- 背景纹理 ---- */
.page-news__bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.06;
  mix-blend-mode: overlay;
}
.page-news__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* ---- 容器 ---- */
.page-news__container {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--news-text-secondary);
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
}
.breadcrumb-link {
  color: var(--news-primary);
  text-decoration: none;
  transition: color var(--news-transition);
  font-weight: 500;
}
.breadcrumb-link:hover,
.breadcrumb-link:focus-visible {
  color: var(--news-accent);
  outline: none;
  text-decoration: underline;
}
.breadcrumb-sep {
  color: var(--news-text-secondary);
  font-family: var(--font-mono, "Courier New", monospace);
  opacity: 0.5;
}
.breadcrumb-current {
  color: var(--news-text);
  font-weight: 600;
}

/* ---- 页面英雄区 ---- */
.page-news__hero {
  margin-bottom: 2.8rem;
  border-left: 4px solid var(--news-primary);
  padding-left: 1.2rem;
}
.page-news__title {
  font-family: var(--font-display, "Impact","Arial Black",sans-serif);
  font-size: 2.8rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--news-text);
  margin: 0 0 0.25rem;
  line-height: 1.1;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.3rem;
}
.page-news__title-decor {
  font-size: 1.6rem;
  color: var(--news-primary);
  opacity: 0.6;
  font-family: var(--font-mono, "Courier New", monospace);
  font-weight: 700;
}
.page-news__subtitle {
  font-size: 1rem;
  color: var(--news-text-secondary);
  margin: 0.5rem 0 0;
  max-width: 520px;
  letter-spacing: 0.01em;
}

/* ---- 时间线区域 ---- */
.page-news__timeline {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

/* ---- 章节头部 ---- */
.timeline-section {
  scroll-margin-top: 2rem;
}
.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.8rem;
  flex-wrap: wrap;
}
.section-number {
  font-family: var(--font-mono, "Courier New", monospace);
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--news-primary);
  line-height: 1;
  letter-spacing: -0.02em;
  background: var(--news-primary-dim);
  padding: 0.1rem 0.7rem;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
}
.section-heading {
  font-family: var(--font-display, "Impact","Arial Black",sans-serif);
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--news-text);
  margin: 0;
  line-height: 1.2;
}
.section-line {
  flex: 1;
  height: 2px;
  min-width: 40px;
  background: linear-gradient(90deg, var(--news-primary) 0%, transparent 100%);
  opacity: 0.25;
}

/* ---- 时间线条目列表 ---- */
.timeline-items {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
  padding-left: 0;
}

/* ---- 单个条目 ---- */
.timeline-item {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  opacity: 0;
  animation: newsFadeSlide 0.6s ease-out forwards;
}
.timeline-item:nth-child(1) { animation-delay: 0.05s; }
.timeline-item:nth-child(2) { animation-delay: 0.15s; }
.timeline-item:nth-child(3) { animation-delay: 0.25s; }
.timeline-item:nth-child(4) { animation-delay: 0.35s; }
.timeline-item:nth-child(5) { animation-delay: 0.45s; }
.timeline-item:nth-child(6) { animation-delay: 0.55s; }
.timeline-item:nth-child(7) { animation-delay: 0.65s; }
.timeline-item:nth-child(8) { animation-delay: 0.75s; }

@keyframes newsFadeSlide {
  0% {
    opacity: 0;
    transform: translateX(-18px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ---- 时间线标记（编号+连线） ---- */
.timeline-marker {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding-bottom: 0.2rem;
}
.timeline-marker__num {
  font-family: var(--font-mono, "Courier New", monospace);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--news-primary);
  background: var(--news-primary-dim);
  min-width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  line-height: 1;
  letter-spacing: -0.02em;
  border: 2px solid var(--news-primary);
  box-shadow: 0 0 12px rgba(0,255,136,0.15);
}
.timeline-marker__line {
  display: none;
}

/* ---- 卡片 ---- */
.timeline-card {
  background: var(--news-card);
  border: 1px solid var(--news-border);
  border-radius: 12px;
  padding: 1.2rem;
  transition: box-shadow var(--news-transition), transform var(--news-transition), border-color var(--news-transition);
  position: relative;
  overflow: hidden;
  flex: 1;
}
.timeline-card:hover,
.timeline-card:focus-within {
  box-shadow: 0 8px 32px rgba(0,0,0,0.45), 0 0 0 1px var(--news-primary-dim);
  transform: translateY(-2px);
  border-color: rgba(0,255,136,0.25);
}

/* ---- 类型标签 ---- */
.card-type {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  margin-bottom: 0.7rem;
  background: var(--news-glass);
  color: var(--news-text-secondary);
  border: 1px solid var(--news-border);
}
.type-feature {
  color: var(--news-primary);
  border-color: var(--news-primary);
  background: var(--news-primary-dim);
}
.type-tip {
  color: var(--news-accent);
  border-color: var(--news-accent);
  background: var(--news-accent-dim);
}
.type-data {
  color: #6BCBFF;
  border-color: #6BCBFF;
  background: rgba(107,203,255,0.12);
}

/* ---- 卡片图片 ---- */
.card-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 0.8rem;
  object-fit: cover;
  display: block;
  border: 1px solid var(--news-border);
  transition: opacity var(--news-transition);
}
.timeline-card:hover .card-img {
  opacity: 0.92;
}

/* ---- 卡片正文 ---- */
.card-body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.card-title {
  font-family: var(--font-display, "Impact","Arial Black",sans-serif);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--news-text);
  margin: 0;
  line-height: 1.3;
}
.card-summary {
  font-size: 0.92rem;
  color: var(--news-text-secondary);
  margin: 0.2rem 0 0.4rem;
  line-height: 1.6;
}

/* ---- 可展开详情（details/summary） ---- */
.card-details {
  margin-top: 0.4rem;
  border-top: 1px solid var(--news-border);
  padding-top: 0.5rem;
}
.card-details__trigger {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--news-primary);
  cursor: pointer;
  user-select: none;
  padding: 0.2rem 0;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color var(--news-transition);
}
.card-details__trigger::-webkit-details-marker {
  display: none;
}
.card-details__trigger::before {
  content: "+";
  font-family: var(--font-mono, "Courier New", monospace);
  font-size: 1rem;
  font-weight: 700;
  color: var(--news-primary);
  transition: transform var(--news-transition);
  display: inline-block;
}
details[open] .card-details__trigger::before {
  content: "−";
  transform: rotate(0deg);
}
.card-details__trigger:hover,
.card-details__trigger:focus-visible {
  color: var(--news-accent);
  outline: none;
}
.card-details__trigger:hover::before,
.card-details__trigger:focus-visible::before {
  color: var(--news-accent);
}
.card-details__content {
  font-size: 0.88rem;
  color: var(--news-text);
  line-height: 1.7;
  padding: 0.6rem 0 0.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.card-details__content p {
  margin: 0;
}

/* ---- 按钮（小号） ---- */
.btn--small {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.45rem 1.2rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: background var(--news-transition), box-shadow var(--news-transition), transform var(--news-transition);
  align-self: flex-start;
  font-family: inherit;
}
.btn-primary {
  background: var(--news-primary);
  color: #0B1A2E;
  box-shadow: 0 2px 12px rgba(0,255,136,0.25);
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background: #00E077;
  box-shadow: 0 4px 20px rgba(0,255,136,0.4);
  transform: translateY(-1px);
  outline: none;
  color: #0B1A2E;
}

/* ---- 相关页面导航 ---- */
.page-news__related {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 2px solid var(--news-border);
}
.related-heading {
  font-family: var(--font-display, "Impact","Arial Black",sans-serif);
  font-size: 1.2rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--news-text-secondary);
  margin: 0 0 1rem;
}
.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.5rem;
}
.related-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--news-primary);
  text-decoration: none;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--news-transition), border-color var(--news-transition);
}
.related-link:hover,
.related-link:focus-visible {
  color: var(--news-accent);
  border-bottom-color: var(--news-accent);
  outline: none;
}

/* =====================================================
   桌面端 ( >= 768px )
   ===================================================== */
@media (min-width: 768px) {
  .page-news__container {
    padding: 2.5rem 2rem 4rem;
  }

  .page-news__title {
    font-size: 3.6rem;
  }
  .page-news__title-decor {
    font-size: 2rem;
  }
  .page-news__subtitle {
    font-size: 1.1rem;
    max-width: 600px;
  }

  /* ---- 章节头部 ---- */
  .section-number {
    font-size: 3rem;
    padding: 0.2rem 1rem;
  }
  .section-heading {
    font-size: 2rem;
  }

  /* ---- 时间线条目：水平布局 ---- */
  .timeline-item {
    flex-direction: row;
    gap: 0;
  }

  /* 时间线标记：左侧竖排 */
  .timeline-marker {
    flex-direction: column;
    align-items: center;
    width: var(--news-timeline-width);
    min-width: var(--news-timeline-width);
    padding-top: 0.3rem;
    gap: 0.2rem;
    position: relative;
  }
  .timeline-marker__num {
    font-size: 1.1rem;
    min-width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--news-primary-dim);
    border: 2px solid var(--news-primary);
    position: relative;
    z-index: 2;
    box-shadow: 0 0 16px rgba(0,255,136,0.2);
  }
  .timeline-marker__line {
    display: block;
    flex: 1;
    width: 2px;
    min-height: 30px;
    background: linear-gradient(180deg, var(--news-primary) 0%, rgba(0,255,136,0.15) 100%);
    opacity: 0.3;
  }
  .timeline-item:last-child .timeline-marker__line {
    display: none;
  }

  /* 卡片：右侧 */
  .timeline-card {
    margin-left: 1.2rem;
    padding: 1.5rem;
    border-radius: 14px;
  }

  /* 卡片图片：限制最大宽度 */
  .card-img {
    max-width: 380px;
    border-radius: 10px;
  }

  /* 类型标签 */
  .card-type {
    font-size: 0.78rem;
    padding: 0.25rem 0.9rem;
  }

  .card-title {
    font-size: 1.25rem;
  }
  .card-summary {
    font-size: 0.95rem;
  }

  /* 展开内容 */
  .card-details__content {
    font-size: 0.9rem;
    padding: 0.8rem 0 0.2rem;
  }

  /* 相关区域 */
  .page-news__related {
    margin-top: 4.5rem;
    padding-top: 2.5rem;
    margin-left: calc(var(--news-timeline-width) + 1.2rem);
  }
  .related-heading {
    font-size: 1.3rem;
  }
  .related-links {
    gap: 1rem 2rem;
  }
  .related-link {
    font-size: 0.95rem;
  }
}

/* =====================================================
   大桌面端 ( >= 1024px )
   ===================================================== */
@media (min-width: 1024px) {
  .page-news__container {
    padding: 3rem 2.5rem 5rem;
  }

  .page-news__title {
    font-size: 4.2rem;
  }
  .page-news__subtitle {
    font-size: 1.15rem;
    max-width: 680px;
  }

  .section-number {
    font-size: 3.4rem;
    padding: 0.3rem 1.2rem;
  }
  .section-heading {
    font-size: 2.2rem;
  }

  .timeline-card {
    padding: 1.8rem 2rem;
  }
  .card-title {
    font-size: 1.35rem;
  }
  .card-img {
    max-width: 420px;
  }

  .timeline-marker__num {
    font-size: 1.2rem;
    min-width: 44px;
    height: 44px;
  }
}

/* ---- 打印样式 ---- */
@media print {
  .page-news {
    background: #fff;
    color: #222;
  }
  .page-news__bg { display: none; }
  .timeline-card {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
  .card-details__trigger { display: none; }
  .card-details__content { display: block !important; }
  .breadcrumb-link { color: #222; }
  .section-number { color: #222; background: #eee; }
  .card-type { border-color: #ccc; }
  .btn--small { display: none; }
}