.page-news {
  --tl-line-color: #1D3557;
  --tl-marker-color: #E63946;
  --tl-marker-inner: #F4A261;
  --card-bg: #1D3557;
  --card-radius: 16px;
  --accent-gradient: linear-gradient(135deg, #E63946, #b81f2d);
  --gold-dim: #F4A261;
  --cream-text: #F1FAEE;
  --brown-dim: #2B2D42;
  --tl-line-width: 3px;
  --tl-marker-size: 18px;
  --tl-card-offset: 28px;
  --tl-img-radius: 10px;
  --content-max-width: 960px;
  --transition-spring: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-family: 'Work Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ── 基础布局 ── */
.page-news {
  background-color: #121212;
  color: var(--cream-text);
  font-family: var(--font-family);
  padding: 1.5rem 1rem 3rem;
  min-height: 100vh;
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.page-news__main-title {
  font-weight: 900;
  font-size: 2.4rem;
  line-height: 1.1;
  margin: 0.5rem 0 0.2rem;
  letter-spacing: -0.02em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-news__subtitle {
  font-weight: 400;
  font-size: 1rem;
  color: var(--brown-dim);
  margin: 0 0 2rem 0;
  border-left: 4px solid var(--tl-marker-color);
  padding-left: 0.75rem;
  line-height: 1.5;
}

.page-news__section {
  margin-top: 3rem;
  padding-top: 0.5rem;
  border-top: 2px solid rgba(230, 57, 70, 0.25);
}

.page-news__section-title {
  font-weight: 900;
  font-size: 1.6rem;
  margin: 0 0 1.5rem 0;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--cream-text);
}

.page-news__section-title::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 1.2em;
  background: var(--accent-gradient);
  border-radius: 4px;
  flex-shrink: 0;
}

/* ── 时间轴 ── */
.page-news__timeline {
  position: relative;
  padding-left: var(--tl-card-offset);
}

.page-news__timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: var(--tl-line-width);
  background: var(--tl-line-color);
  border-radius: 4px;
}

.page-news__timeline-item {
  position: relative;
  margin-bottom: 2rem;
  list-style: none;
}

.page-news__timeline-marker {
  position: absolute;
  left: calc(-1 * var(--tl-card-offset) + 8px - var(--tl-marker-size) / 2 + var(--tl-line-width) / 2);
  top: 1.5rem;
  width: var(--tl-marker-size);
  height: var(--tl-marker-size);
  background: var(--tl-marker-color);
  border: 3px solid var(--tl-marker-inner);
  border-radius: 4px;
  transform: rotate(45deg);
  z-index: 2;
  box-shadow: 0 0 0 3px #121212;
  transition: transform var(--transition-spring);
}

.page-news__timeline-item:hover .page-news__timeline-marker {
  transform: rotate(45deg) scale(1.2);
  background: var(--tl-marker-inner);
  border-color: var(--tl-marker-color);
}

.page-news__timeline-card {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  padding: 1rem 1rem 0.75rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  box-shadow: 0 4px 20px rgba(0,0,0,0.35);
  transition: transform var(--transition-spring), box-shadow var(--transition-spring);
  border: 1px solid rgba(241, 250, 238, 0.06);
}

.page-news__timeline-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  border-color: rgba(230, 57, 70, 0.2);
}

.page-news__tl-img {
  width: 60px;
  height: 60px;
  border-radius: var(--tl-img-radius);
  object-fit: cover;
  flex-shrink: 0;
  background: #2B2D42;
  border: 2px solid rgba(244, 162, 97, 0.2);
  transition: border-color var(--transition-spring);
}

.page-news__timeline-card:hover .page-news__tl-img {
  border-color: rgba(244, 162, 97, 0.6);
}

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

.page-news__tl-title {
  font-weight: 900;
  font-size: 1.1rem;
  margin: 0 0 0.3rem 0;
  line-height: 1.3;
  color: var(--cream-text);
  letter-spacing: -0.01em;
}

/* ── details / summary 可展开 ── */
.page-news__tl-details {
  display: block;
  margin-top: 0.15rem;
}

.page-news__tl-summary {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  cursor: pointer;
  list-style: none;
  padding: 0;
  transition: opacity var(--transition-spring);
}

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

.page-news__tl-summary::marker {
  display: none;
  content: '';
}

.page-news__tl-summary:hover {
  opacity: 0.85;
}

.page-news__tl-excerpt {
  font-size: 0.9rem;
  line-height: 1.55;
  color: rgba(241, 250, 238, 0.75);
  flex: 1;
}

.page-news__tl-icon {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--tl-marker-color);
  flex-shrink: 0;
  transition: transform 0.3s ease;
  line-height: 1;
}

.page-news__tl-details[open] .page-news__tl-icon {
  transform: rotate(45deg);
  color: var(--gold-dim);
}

.page-news__tl-detail {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(241, 250, 238, 0.1);
  animation: pageNewsFadeIn 0.35s ease;
}

.page-news__tl-detail p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(241, 250, 238, 0.85);
  margin: 0 0 0.75rem 0;
}

.page-news__tl-link {
  display: inline-block;
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--gold-dim);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-spring), color var(--transition-spring);
  padding-bottom: 2px;
}

.page-news__tl-link:hover {
  color: var(--tl-marker-color);
  border-bottom-color: var(--tl-marker-color);
}

@keyframes pageNewsFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── 战速对比专题 ── */
.page-news__featured {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  padding: 1.25rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.35);
  border: 1px solid rgba(244, 162, 97, 0.12);
}

.page-news__featured-img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
  background: #2B2D42;
  margin-bottom: 1rem;
  border: 1px solid rgba(241, 250, 238, 0.08);
}

.page-news__featured-desc {
  font-size: 0.95rem;
  line-height: 1.65;
  color: rgba(241, 250, 238, 0.8);
  margin: 0 0 1.25rem 0;
}

/* ── 专题卡片横向滚动 ── */
.page-news__featured-cards {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.5rem;
  margin-bottom: 1.25rem;
  scrollbar-width: thin;
  scrollbar-color: var(--tl-marker-color) rgba(241,250,238,0.1);
}

.page-news__featured-cards::-webkit-scrollbar {
  height: 4px;
}

.page-news__featured-cards::-webkit-scrollbar-track {
  background: rgba(241,250,238,0.08);
  border-radius: 4px;
}

.page-news__featured-cards::-webkit-scrollbar-thumb {
  background: var(--tl-marker-color);
  border-radius: 4px;
}

.page-news__f-card {
  flex: 0 0 180px;
  scroll-snap-align: start;
  background: rgba(18, 18, 18, 0.6);
  border-radius: 14px;
  padding: 1rem 0.9rem;
  border: 1px solid rgba(241, 250, 238, 0.08);
  transition: background var(--transition-spring), border-color var(--transition-spring);
}

.page-news__f-card:hover {
  background: rgba(18, 18, 18, 0.85);
  border-color: rgba(230, 57, 70, 0.3);
}

.page-news__f-card-icon {
  display: inline-block;
  font-size: 1.6rem;
  color: var(--gold-dim);
  margin-bottom: 0.4rem;
  line-height: 1;
}

.page-news__f-card-title {
  font-weight: 900;
  font-size: 0.95rem;
  margin: 0 0 0.3rem 0;
  color: var(--cream-text);
}

.page-news__f-card-text {
  font-size: 0.82rem;
  line-height: 1.5;
  color: rgba(241, 250, 238, 0.7);
  margin: 0;
}

.page-news__featured .btn-prime {
  display: inline-block;
  background: var(--accent-gradient);
  color: #fff;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.7rem 1.6rem;
  border-radius: 9999px;
  text-decoration: none;
  transition: transform var(--transition-spring), box-shadow var(--transition-spring);
  box-shadow: 0 4px 16px rgba(230, 57, 70, 0.25);
}

.page-news__featured .btn-prime:hover {
  transform: scale(1.04);
  box-shadow: 0 6px 24px rgba(230, 57, 70, 0.4);
}

/* ── 数据小贴士 ── */
.page-news__tips {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-news__tip-card {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  padding: 1.25rem 1.25rem 1.25rem 1.75rem;
  border-left: 5px solid var(--tl-marker-color);
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  transition: transform var(--transition-spring), box-shadow var(--transition-spring);
  position: relative;
}

.page-news__tip-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.4);
}

.page-news__tip-number {
  font-weight: 900;
  font-size: 2rem;
  line-height: 1;
  color: rgba(230, 57, 70, 0.15);
  position: absolute;
  right: 1rem;
  top: 0.6rem;
  pointer-events: none;
}

.page-news__tip-title {
  font-weight: 900;
  font-size: 1.1rem;
  margin: 0 0 0.35rem 0;
  color: var(--cream-text);
}

.page-news__tip-text {
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(241, 250, 238, 0.75);
  margin: 0;
}

/* ── 桌面端 (>768px) ── */
@media screen and (min-width: 768px) {
  .page-news {
    padding: 2rem 2rem 4rem;
  }

  .page-news__main-title {
    font-size: 3.2rem;
  }

  .page-news__subtitle {
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
  }

  .page-news__section {
    margin-top: 4rem;
  }

  .page-news__section-title {
    font-size: 1.9rem;
    margin-bottom: 2rem;
  }

  /* ── 时间轴桌面 ── */
  .page-news__timeline {
    padding-left: 48px;
  }

  .page-news__timeline::before {
    left: 14px;
  }

  .page-news__timeline-marker {
    left: calc(-48px + 14px - var(--tl-marker-size) / 2 + var(--tl-line-width) / 2);
    top: 1.8rem;
    width: 22px;
    height: 22px;
  }

  .page-news__timeline-card {
    padding: 1.25rem 1.5rem 1rem;
    gap: 1.5rem;
  }

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

  .page-news__tl-title {
    font-size: 1.2rem;
  }

  .page-news__tl-excerpt {
    font-size: 0.95rem;
  }

  .page-news__tl-detail p {
    font-size: 0.95rem;
  }

  /* ── 专题桌面 ── */
  .page-news__featured {
    padding: 1.75rem;
  }

  .page-news__featured-img {
    max-height: 320px;
    object-fit: cover;
  }

  .page-news__featured-desc {
    font-size: 1rem;
  }

  .page-news__f-card {
    flex: 0 0 200px;
  }

  /* ── 小贴士桌面网格 ── */
  .page-news__tips {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }

  .page-news__tip-card {
    padding: 1.5rem 1.5rem 1.5rem 2rem;
  }

  .page-news__tip-title {
    font-size: 1.15rem;
  }
}

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

  .page-news__main-title {
    font-size: 3.8rem;
  }

  .page-news__timeline-card {
    padding: 1.5rem 2rem 1.25rem;
  }

  .page-news__f-card {
    flex: 0 0 220px;
  }
}