.page-news {
  --timeline-bar-w: 6px;
  --timeline-icon-s: 44px;
  --card-r: var(--radius);
}

/* ---------- 面包屑 ---------- */
.page-news .breadcrumb {
  padding: 12px 24px;
  max-width: var(--container-max);
  margin: 0 auto;
  font-size: 13px;
  color: var(--color-stone);
  font-family: var(--font-body);
}
.page-news .breadcrumb a {
  color: var(--color-orange);
  text-decoration: none;
}
.page-news .breadcrumb a:hover {
  text-decoration: underline;
}
.page-news .breadcrumb .sep {
  margin: 0 6px;
  color: var(--color-stone);
}

/* ---------- 标题区（移动端优先） ---------- */
.page-news .news-hero {
  position: relative;
  overflow: hidden;
  min-height: 320px;
  display: flex;
  align-items: center;
}
.page-news .news-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-news .news-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  filter: brightness(0.55) saturate(1.25);
}
.page-news .news-hero__content {
  position: relative;
  z-index: 1;
  padding: 40px 24px;
  width: 100%;
}
.page-news .news-hero__title {
  font-family: var(--font-heading);
  font-size: 34px;
  font-weight: 800;
  color: var(--color-white);
  margin: 0 0 12px;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.page-news .news-hero__desc {
  font-family: var(--font-body);
  font-size: 16px;
  color: rgba(255,255,255,0.92);
  max-width: 600px;
  line-height: 1.6;
  margin: 0;
}

/* ---------- 最新动态摘要（移动端优先） ---------- */
.page-news .news-highlights {
  padding: 40px 0 32px;
}
.page-news .section__title {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 20px;
  position: relative;
  display: inline-block;
}
.page-news .section__title::after {
  content: '';
  display: block;
  width: 44px;
  height: 4px;
  background: var(--color-orange);
  margin-top: 6px;
  border-radius: 2px;
}
.page-news .news-highlights__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.page-news .news-highlights__item {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
}
.page-news .news-highlights__item .tag {
  align-self: flex-start;
}

/* ---------- 时间轴导航（移动端优先） ---------- */
.page-news .timeline-nav {
  padding: 0 24px;
  max-width: var(--container-max);
  margin: 0 auto 24px;
}
.page-news .timeline-nav__scroll {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
  scrollbar-color: var(--color-orange) transparent;
  -webkit-overflow-scrolling: touch;
}
.page-news .timeline-nav__scroll::-webkit-scrollbar {
  height: 3px;
}
.page-news .timeline-nav__scroll::-webkit-scrollbar-thumb {
  background: var(--color-orange);
  border-radius: 3px;
}
.page-news .timeline-nav__btn {
  flex-shrink: 0;
  padding: 8px 18px;
  border: 2px solid var(--color-blue);
  border-radius: 24px;
  background: transparent;
  color: var(--color-blue);
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.page-news .timeline-nav__btn.is-active,
.page-news .timeline-nav__btn:hover {
  background: var(--color-blue);
  color: var(--color-white);
  border-color: var(--color-blue);
}

/* ---------- 时间轴卡片列表（移动端优先） ---------- */
.page-news .timeline {
  padding: 0 0 56px;
}
.page-news .timeline__list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
}
/* 时间轴竖线（移动端隐藏） */
.page-news .timeline__list::before {
  display: none;
}

/* 单个卡片 */
.page-news .timeline__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
  background: var(--color-white);
  border-radius: var(--card-r);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.page-news .timeline__card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

/* 彩色条（移动端顶部横条） */
.page-news .timeline__card-bar {
  width: 100%;
  height: 4px;
  border-radius: var(--card-r) var(--card-r) 0 0;
  flex-shrink: 0;
}

/* 图标 */
.page-news .timeline__card-icon {
  flex-shrink: 0;
  width: var(--timeline-icon-s);
  height: var(--timeline-icon-s);
  border-radius: 50%;
  background: var(--color-bg-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-blue);
}
.page-news .timeline__card-icon svg {
  width: 22px;
  height: 22px;
}

/* 主体 */
.page-news .timeline__card-body {
  flex: 1;
  min-width: 0;
}
.page-news .timeline__card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}
.page-news .timeline__card-version {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-stone);
  background: var(--color-bg-warm);
  padding: 2px 10px;
  border-radius: 10px;
}
.page-news .timeline__card-title {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 10px;
  line-height: 1.3;
}

/* details/summary 展开 */
.page-news .timeline__card-details {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text);
}
.page-news .timeline__card-summary {
  cursor: pointer;
  color: var(--color-blue);
  font-weight: 500;
  padding: 6px 0;
  list-style: none;
  position: relative;
  padding-left: 22px;
}
.page-news .timeline__card-summary::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-orange);
  transition: transform 0.2s;
}
.page-news .timeline__card-details[open] .timeline__card-summary::before {
  transform: rotate(90deg);
}
.page-news .timeline__card-summary::-webkit-details-marker {
  display: none;
}
.page-news .timeline__card-content {
  padding: 14px 0 6px;
  border-top: 1px solid var(--color-bg-warm);
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.page-news .timeline__card-content p {
  margin: 0;
}
.page-news .timeline__card-content a {
  color: var(--color-orange);
  text-decoration: underline;
}
.page-news .timeline__card-img {
  width: 100%;
  max-width: 280px;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  align-self: flex-start;
}

/* 操作按钮（移动端始终可见） */
.page-news .timeline__card-actions {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  opacity: 1;
  transform: none;
  transition: var(--transition);
}
.page-news .timeline__card-actions .btn {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ---------- 底部内链（移动端优先） ---------- */
.page-news .news-links {
  padding: 40px 0;
  background: var(--color-bg-warm);
}
.page-news .news-links__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.page-news .news-links__item {
  display: block;
  padding: 14px 16px;
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-blue);
  text-decoration: none;
  text-align: center;
  transition: var(--transition);
}
.page-news .news-links__item:hover {
  background: var(--color-blue);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

/* ===== 平板端 (min-width: 640px) ===== */
@media (min-width: 640px) {
  .page-news .news-highlights__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .page-news .news-links__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }
  .page-news .news-highlights__item {
    padding: 20px 24px;
  }
}

/* ===== 桌面端 (min-width: 768px) ===== */
@media (min-width: 768px) {
  .page-news .news-hero {
    min-height: 400px;
  }
  .page-news .news-hero__title {
    font-size: 48px;
  }
  .page-news .news-hero__desc {
    font-size: 18px;
  }
  .page-news .news-hero__content {
    padding: 60px 24px;
  }

  .page-news .section__title {
    font-size: 28px;
  }

  /* 时间轴竖线（桌面显示） */
  .page-news .timeline__list::before {
    display: block;
    content: '';
    position: absolute;
    left: 36px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--color-orange), var(--color-blue), var(--color-green));
    border-radius: 2px;
    opacity: 0.3;
  }

  .page-news .timeline__card {
    flex-direction: row;
    padding: 24px 28px;
    margin-left: 56px;
    gap: 20px;
  }

  /* 彩色条（桌面左侧竖条） */
  .page-news .timeline__card-bar {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--timeline-bar-w);
    height: auto;
    border-radius: var(--card-r) 0 0 var(--card-r);
  }

  .page-news .timeline__card-icon {
    margin-top: 4px;
  }

  .page-news .timeline__card-title {
    font-size: 22px;
  }

  .page-news .timeline__card-details {
    font-size: 15px;
  }

  /* 操作按钮（桌面悬停显示） */
  .page-news .timeline__card-actions {
    opacity: 0;
    transform: translateY(4px);
  }
  .page-news .timeline__card:hover .timeline__card-actions {
    opacity: 1;
    transform: translateY(0);
  }

  .page-news .timeline__list {
    gap: 32px;
  }

  .page-news .timeline-nav__btn {
    padding: 10px 24px;
    font-size: 14px;
  }
  .page-news .timeline-nav__scroll {
    gap: 12px;
  }
}

/* ===== 大桌面 (min-width: 1024px) ===== */
@media (min-width: 1024px) {
  .page-news .news-hero__title {
    font-size: 56px;
  }
  .page-news .news-hero__desc {
    font-size: 20px;
  }
  .page-news .timeline__card {
    padding: 28px 32px;
  }
  .page-news .timeline__card-img {
    max-width: 240px;
  }
  .page-news .news-links__item {
    font-size: 15px;
    padding: 16px 20px;
  }
}