/* ===== page-news 专属样式 ===== */
.page-news {
  --feature-bg: var(--color-bg-dark);
  --feature-accent: var(--color-primary);
  --timeline-line: var(--color-primary);
  --timeline-dot: var(--color-primary);
  --filter-active-bg: var(--color-primary);
  --filter-active-text: var(--color-text-on-dark);
  --filter-inactive-bg: rgba(255,255,255,0.08);
  --filter-inactive-text: var(--color-text-secondary);
  --insight-card-radius: var(--radius-md);
  --faq-border: rgba(255,255,255,0.1);

  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1rem 3rem;
  color: var(--color-text-on-dark);
}

/* ---- 面包屑 ---- */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  padding: 0.5rem 0;
}

.page-news .breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-news .breadcrumb a:hover {
  color: var(--color-primary-variant);
}

.page-news .breadcrumb-sep {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  line-height: 1;
}

/* ---- 页面标题区 ---- */
.page-news .page-headline {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  line-height: 1.2;
  color: var(--color-text-on-dark);
  letter-spacing: -0.02em;
}

.page-news .page-subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin: 0 0 2rem;
  line-height: 1.5;
}

/* ---- 特色卡片 ---- */
.page-news .feature-card {
  display: flex;
  flex-direction: column;
  background: var(--feature-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,102,0,0.25);
}

.page-news .feature-card__body {
  padding: 1.5rem;
  order: 2;
}

.page-news .feature-card .tag-capsule {
  display: inline-block;
  background: var(--feature-accent);
  color: var(--color-text-on-dark);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-capsule);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.page-news .feature-card__title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 0.75rem;
  color: var(--color-text-on-dark);
}

.page-news .feature-card__list {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-news .feature-card__list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.page-news .feature-card__list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--feature-accent);
  font-weight: 700;
}

.page-news .feature-card__date {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  font-style: italic;
}

.page-news .feature-card__media {
  order: 1;
  background: linear-gradient(135deg, rgba(255,102,0,0.15), rgba(0,180,216,0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 180px;
}

.page-news .feature-card__img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  display: block;
}

.page-news .btn-sm {
  font-size: 0.85rem;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-capsule);
}

/* ---- 板块标题 ---- */
.page-news .section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 1.25rem;
  color: var(--color-text-on-dark);
  position: relative;
  padding-bottom: 0.5rem;
}

.page-news .section-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
}

/* ---- 筛选栏 ---- */
.page-news .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.page-news .filter-radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.page-news .filter-label {
  display: inline-block;
  padding: 0.35rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-capsule);
  background: var(--filter-inactive-bg);
  color: var(--filter-inactive-text);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  user-select: none;
  border: 1px solid rgba(255,255,255,0.06);
}

.page-news .filter-label:hover {
  background: rgba(255,255,255,0.15);
  color: var(--color-text-on-dark);
}

.page-news .filter-radio:checked + .filter-label {
  background: var(--filter-active-bg);
  color: var(--filter-active-text);
  border-color: var(--filter-active-bg);
}

/* ---- 筛选逻辑 ---- */
.page-news #filter-all:checked ~ .timeline .timeline-item { display: flex; }
.page-news #filter-update:checked ~ .timeline .timeline-item[data-category="update"] { display: flex; }
.page-news #filter-update:checked ~ .timeline .timeline-item:not([data-category="update"]) { display: none; }
.page-news #filter-tech:checked ~ .timeline .timeline-item[data-category="tech"] { display: flex; }
.page-news #filter-tech:checked ~ .timeline .timeline-item:not([data-category="tech"]) { display: none; }
.page-news #filter-feature:checked ~ .timeline .timeline-item[data-category="feature"] { display: flex; }
.page-news #filter-feature:checked ~ .timeline .timeline-item:not([data-category="feature"]) { display: none; }

/* ---- 时间线 ---- */
.page-news .timeline {
  position: relative;
  padding-left: 1.5rem;
}

.page-news .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--timeline-line);
  opacity: 0.35;
  border-radius: 1px;
}

.page-news .timeline-item {
  position: relative;
  display: flex;
  gap: 1rem;
  padding-bottom: 1.25rem;
}

.page-news .timeline-dot {
  position: absolute;
  left: -1.5rem;
  top: 0.35rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--timeline-dot);
  border: 3px solid var(--color-bg-dark);
  box-shadow: 0 0 0 2px var(--timeline-dot);
  flex-shrink: 0;
  z-index: 1;
}

.page-news .timeline-content {
  flex: 1;
  min-width: 0;
}

/* ---- 文章折叠 ---- */
.page-news .timeline-details {
  display: block;
}

.page-news .timeline-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 0.75rem;
  cursor: pointer;
  list-style: none;
  padding: 0.35rem 0;
  transition: color var(--transition-fast);
}

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

.page-news .timeline-summary:hover .article-title {
  color: var(--color-primary);
}

.page-news .article-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-on-dark);
  transition: color var(--transition-fast);
}

.page-news .article-date {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
  font-style: italic;
}

.page-news .article-summary {
  margin: 0.25rem 0 0.5rem;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
  padding: 0.5rem 0 0.25rem 0.75rem;
  border-left: 2px solid var(--color-primary);
}

/* ---- 行业洞察 ---- */
.page-news .industry-insights {
  margin-top: 2.5rem;
}

.page-news .insight-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-news .insight-card {
  display: flex;
  flex-direction: column;
  background: rgba(255,255,255,0.04);
  border-radius: var(--insight-card-radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.page-news .insight-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.page-news .insight-card__img-wrap {
  width: 100%;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255,102,0,0.1), rgba(0,180,216,0.06));
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-news .insight-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-news .insight-card__body {
  padding: 1rem 1.25rem 1.25rem;
}

.page-news .insight-card__title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  line-height: 1.3;
  color: var(--color-text-on-dark);
}

.page-news .insight-card__text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0;
}

.page-news .insight-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.page-news .insight-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ---- 常见问题更新 ---- */
.page-news .faq-update {
  margin-top: 2.5rem;
  padding: 1.5rem;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-md);
  border: 1px solid var(--faq-border);
}

.page-news .faq-update__intro {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin: 0 0 1rem;
  line-height: 1.5;
}

.page-news .faq-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.page-news .faq-list__item {
  font-size: 0.95rem;
}

.page-news .faq-link {
  color: var(--color-text-on-dark);
  text-decoration: none;
  display: inline-block;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.page-news .faq-link:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.page-news .faq-update .btn {
  display: inline-block;
}

/* ---- data-reveal 动画（兼容 reduced-motion） ---- */
.page-news [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

@media (prefers-reduced-motion: reduce) {
  .page-news [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

.page-news [data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

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

  .page-news .page-headline {
    font-size: 2.6rem;
  }

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

  /* ---- 特色卡片（桌面水平布局） ---- */
  .page-news .feature-card {
    flex-direction: row;
    margin-bottom: 3rem;
  }

  .page-news .feature-card__body {
    flex: 1.2;
    padding: 2rem;
    order: 1;
  }

  .page-news .feature-card__title {
    font-size: 1.6rem;
  }

  .page-news .feature-card__media {
    flex: 1;
    order: 2;
    min-height: unset;
  }

  .page-news .feature-card__img {
    height: 100%;
    object-fit: cover;
  }

  /* ---- 时间线 ---- */
  .page-news .timeline {
    padding-left: 2rem;
  }

  .page-news .timeline::before {
    left: 9px;
  }

  .page-news .timeline-dot {
    left: -2rem;
    width: 18px;
    height: 18px;
  }

  .page-news .article-title {
    font-size: 1.1rem;
  }

  .page-news .article-summary {
    font-size: 0.95rem;
  }

  /* ---- 洞察网格 ---- */
  .page-news .insight-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-news .insight-card {
    flex-direction: column;
  }

  .page-news .insight-card__title {
    font-size: 1.1rem;
  }

  /* ---- FAQ 区 ---- */
  .page-news .faq-update {
    padding: 2rem;
  }

  .page-news .faq-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
  }
}

@media (min-width: 1024px) {
  .page-news {
    padding: 2.5rem 2.5rem 5rem;
  }

  .page-news .page-headline {
    font-size: 3rem;
  }

  .page-news .feature-card__body {
    padding: 2.5rem;
  }

  .page-news .feature-card__title {
    font-size: 1.8rem;
  }

  .page-news .insight-grid {
    gap: 2rem;
  }
}