/* ===== 文章中心专属样式 ===== */
.page-news {
  --news-hero-bg: linear-gradient(135deg, var(--color-secondary, #1D3557) 0%, rgba(29,53,87,0.92) 100%);
  --news-accent-line: var(--color-primary, #E63946);
  --news-card-radius: 8px;
  --news-timeline-dot-size: 16px;
  --news-timeline-line-width: 3px;
  --news-transition: var(--transition-base, 0.3s ease);
  --news-font-heading: var(--font-heading, 'Montserrat','Noto Sans SC',sans-serif);
  --news-font-body: var(--font-body, 'Noto Sans SC',sans-serif);
  --news-shadow-card: var(--shadow-card, 0 2px 8px rgba(29,53,87,0.08));
  --news-shadow-hover: var(--shadow-card-hover, 0 8px 24px rgba(29,53,87,0.12));
}

/* ---------- HERO ---------- */
.page-news__hero {
  background: var(--news-hero-bg);
  padding: 2.5rem 1rem 2rem;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.page-news__hero::after {
  content: '';
  position: absolute;
  right: -60px;
  top: -60px;
  width: 240px;
  height: 240px;
  background: rgba(230,57,70,0.15);
  border-radius: 50%;
  pointer-events: none;
}

.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}

.page-news .breadcrumb a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s);
}

.page-news .breadcrumb a:hover {
  color: #fff;
  text-decoration: underline;
}

.page-news .breadcrumb__sep {
  color: rgba(255,255,255,0.5);
  margin: 0 0.15rem;
}

.page-news__title {
  font-family: var(--news-font-heading);
  font-size: 2.6rem;
  font-weight: 800;
  color: #fff;
  margin: 0 0 0.4rem;
  line-height: 1.1;
  letter-spacing: 0.02em;
  position: relative;
  z-index: 1;
}

.page-news__subtitle {
  font-family: var(--news-font-body);
  font-size: 1rem;
  color: rgba(255,255,255,0.75);
  margin: 0;
  position: relative;
  z-index: 1;
  letter-spacing: 0.06em;
}

/* ---------- FILTER BAR ---------- */
.filter-container {
  position: relative;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2.2rem;
  padding: 0.75rem 0.5rem;
  border-bottom: 2px solid var(--color-border, rgba(29,53,87,0.12));
  position: relative;
}

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

.filter-bar__label {
  display: inline-block;
  padding: 0.45rem 1.2rem;
  font-family: var(--news-font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted, #457B9D);
  background: var(--color-card-bg, #F1FAEE);
  border: 1.5px solid transparent;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition-fast, 0.2s);
  user-select: none;
  line-height: 1.4;
}

.filter-bar__label:hover {
  background: rgba(230,57,70,0.08);
  color: var(--color-primary, #E63946);
  border-color: rgba(230,57,70,0.2);
}

.filter-bar__input:checked + .filter-bar__label {
  background: var(--color-primary, #E63946);
  color: #fff;
  border-color: var(--color-primary, #E63946);
  box-shadow: 0 2px 8px rgba(230,57,70,0.3);
}

.filter-bar__icon-wrap {
  margin-left: auto;
  flex-shrink: 0;
  opacity: 0.35;
  transition: opacity var(--transition-fast, 0.2s);
}

.filter-bar__icon-wrap:hover {
  opacity: 0.6;
}

.filter-bar__icon {
  display: block;
  width: 40px;
  height: auto;
  max-width: 100%;
  border-radius: 4px;
}

/* ---------- SECTION HEADER ---------- */
.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-news .section-title {
  font-family: var(--news-font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-secondary, #1D3557);
  margin: 0;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.page-news .divider--skew {
  flex: 1;
  height: 4px;
  background: var(--color-primary, #E63946);
  transform: skewX(-12deg);
  border-radius: 2px;
  min-width: 40px;
}

/* ---------- TIMELINE SECTION ---------- */
.timeline-section {
  margin-bottom: 3.5rem;
  position: relative;
}

.timeline-section__img-wrap {
  margin-bottom: 1.8rem;
  border-radius: var(--news-card-radius);
  overflow: hidden;
  box-shadow: var(--news-shadow-card);
}

.timeline-section__hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}

.timeline {
  position: relative;
  padding-left: 2.2rem;
}

/* 时间线竖线 */
.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: var(--news-timeline-line-width);
  background: linear-gradient(180deg, var(--color-primary, #E63946) 0%, var(--color-accent, #F4A261) 100%);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
  display: flex;
  align-items: flex-start;
  gap: 0;
}

/* 通过筛选控制显隐 */
.filter-bar__input#cat-all:checked ~ .timeline-section .timeline-item,
.filter-bar__input#cat-brand:checked ~ .timeline-section .timeline-item[data-category="brand"],
.filter-bar__input#cat-maintain:checked ~ .timeline-section .timeline-item[data-category="maintain"],
.filter-bar__input#cat-insight:checked ~ .timeline-section .timeline-item[data-category="insight"] {
  display: flex;
}

.filter-bar__input#cat-brand:checked ~ .timeline-section .timeline-item:not([data-category="brand"]),
.filter-bar__input#cat-maintain:checked ~ .timeline-section .timeline-item:not([data-category="maintain"]),
.filter-bar__input#cat-insight:checked ~ .timeline-section .timeline-item:not([data-category="insight"]) {
  display: none;
}

.timeline-item__dot {
  position: absolute;
  left: -2.2rem;
  top: 1.2rem;
  width: var(--news-timeline-dot-size);
  height: var(--news-timeline-dot-size);
  border-radius: 50%;
  background: var(--color-primary, #E63946);
  border: 3px solid var(--color-bg, #FFFFFF);
  box-shadow: 0 0 0 2px var(--color-primary, #E63946);
  z-index: 1;
  flex-shrink: 0;
  transform: translateX(-50%);
  left: calc(-2.2rem + 6px + var(--news-timeline-line-width) / 2);
}

.timeline-item__dot::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--color-accent, #F4A261);
  opacity: 0.7;
}

.timeline-item__content {
  flex: 1;
  padding: 1.25rem 1.5rem;
  transition: transform var(--news-transition), box-shadow var(--news-transition);
  border-radius: var(--news-card-radius);
}

.timeline-item__content:hover {
  transform: translateY(-4px);
  box-shadow: var(--news-shadow-hover);
}

.timeline-item__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.page-news .tag {
  display: inline-block;
  padding: 0.2rem 0.75rem;
  font-family: var(--news-font-body);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: 3px;
  line-height: 1.5;
}

.tag--brand {
  background: var(--color-secondary, #1D3557);
  color: #fff;
}

.tag--maintain {
  background: var(--color-primary, #E63946);
  color: #fff;
}

.tag--insight {
  background: var(--color-accent, #F4A261);
  color: var(--color-text, #1D1D1D);
}

.timeline-item__time {
  font-family: var(--news-font-body);
  font-size: 0.8rem;
  color: var(--color-text-muted, #457B9D);
  font-weight: 500;
}

.timeline-item__title {
  font-family: var(--news-font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text, #1D1D1D);
  margin: 0 0 0.45rem;
  line-height: 1.3;
}

.timeline-item__excerpt {
  font-family: var(--news-font-body);
  font-size: 0.95rem;
  color: var(--color-text, #1D1D1D);
  line-height: 1.6;
  margin: 0 0 0.6rem;
}

.timeline-item__details,
.insight-card__details {
  font-family: var(--news-font-body);
  font-size: 0.9rem;
  color: var(--color-text, #1D1D1D);
}

.timeline-item__summary-open,
.insight-card__summary-open {
  display: inline-block;
  cursor: pointer;
  color: var(--color-primary, #E63946);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.2rem 0;
  border-bottom: 1.5px dashed currentColor;
  transition: border-style var(--transition-fast, 0.2s);
}

.timeline-item__summary-open:hover,
.insight-card__summary-open:hover {
  border-bottom-style: solid;
}

.timeline-item__details-body,
.insight-card__details-body {
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--color-border, rgba(29,53,87,0.12));
  line-height: 1.7;
}

.timeline-item__details-body p,
.insight-card__details-body p {
  margin: 0 0 0.5rem;
}

.timeline-item__details-body a,
.insight-card__details-body a {
  color: var(--color-primary, #E63946);
  text-decoration: underline;
  font-weight: 500;
}

/* ---------- INSIGHTS SECTION ---------- */
.insights-section {
  margin-bottom: 3.5rem;
}

.insights-section__img-wrap {
  margin-bottom: 1.8rem;
  border-radius: var(--news-card-radius);
  overflow: hidden;
  box-shadow: var(--news-shadow-card);
}

.insights-section__hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}

.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

/* 行业观察筛选 */
.filter-bar__input#cat-all:checked ~ .insights-section .insight-card,
.filter-bar__input#cat-brand:checked ~ .insights-section .insight-card[data-category="brand"],
.filter-bar__input#cat-maintain:checked ~ .insights-section .insight-card[data-category="maintain"],
.filter-bar__input#cat-insight:checked ~ .insights-section .insight-card[data-category="insight"] {
  display: flex;
}

.filter-bar__input#cat-brand:checked ~ .insights-section .insight-card:not([data-category="brand"]),
.filter-bar__input#cat-maintain:checked ~ .insights-section .insight-card:not([data-category="maintain"]),
.filter-bar__input#cat-insight:checked ~ .insights-section .insight-card:not([data-category="insight"]) {
  display: none;
}

.insight-card {
  flex-direction: column;
  padding: 1.5rem;
  transition: transform var(--news-transition), box-shadow var(--news-transition);
  border-radius: var(--news-card-radius);
}

.insight-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--news-shadow-hover);
}

.insight-card__header {
  margin-bottom: 0.75rem;
}

.insight-card__title {
  font-family: var(--news-font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text, #1D1D1D);
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.insight-card__excerpt {
  font-family: var(--news-font-body);
  font-size: 0.95rem;
  color: var(--color-text, #1D1D1D);
  line-height: 1.6;
  margin: 0 0 0.75rem;
}

/* ---------- INDEX SECTION ---------- */
.index-section {
  margin-bottom: 3rem;
}

.index-section__img-wrap {
  margin-bottom: 1.5rem;
  border-radius: var(--news-card-radius);
  overflow: hidden;
  box-shadow: var(--news-shadow-card);
  max-width: 400px;
}

.index-section__bg-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}

.index-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.index-category {
  padding: 1.2rem 1.4rem;
  background: var(--color-card-bg, #F1FAEE);
  border-left: 4px solid var(--color-primary, #E63946);
  border-radius: 0 var(--news-card-radius) var(--news-card-radius) 0;
  transition: box-shadow var(--news-transition);
}

.index-category:hover {
  box-shadow: var(--news-shadow-hover);
}

.index-category--empty {
  border-left-color: var(--color-text-muted, #457B9D);
  opacity: 0.7;
}

.index-category__title {
  font-family: var(--news-font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-secondary, #1D3557);
  margin: 0 0 0.6rem;
  letter-spacing: 0.02em;
}

.index-category__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.index-category__link {
  font-family: var(--news-font-body);
  font-size: 0.9rem;
  color: var(--color-text, #1D1D1D);
  text-decoration: none;
  padding: 0.15rem 0;
  display: inline-block;
  position: relative;
  transition: color var(--transition-fast, 0.2s);
}

.index-category__link::before {
  content: '›';
  color: var(--color-primary, #E63946);
  font-weight: 700;
  margin-right: 0.4rem;
}

.index-category__link:hover {
  color: var(--color-primary, #E63946);
  text-decoration: underline;
}

.index-category__empty-text {
  font-family: var(--news-font-body);
  font-size: 0.85rem;
  color: var(--color-text-muted, #457B9D);
  margin: 0;
  font-style: italic;
}

/* ---------- CROSS NAV ---------- */
.page-news__cross-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin: 2.5rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1.5px solid var(--color-border, rgba(29,53,87,0.12));
}

.page-news .btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.5rem;
  font-family: var(--news-font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-secondary, #1D3557);
  background: transparent;
  border: 1.5px solid var(--color-secondary, #1D3557);
  border-radius: 6px;
  text-decoration: none;
  transition: all var(--transition-fast, 0.2s);
  line-height: 1.4;
}

.page-news .btn-outline:hover {
  color: #fff;
  background: var(--color-secondary, #1D3557);
  border-color: var(--color-secondary, #1D3557);
}

/* ---------- RESPONSIVE ---------- */
/* 移动端优先基础样式已在上面定义，以下为桌面端覆盖 */

@media (min-width: 640px) {
  .page-news__hero {
    padding: 3rem 2rem 2.5rem;
  }

  .page-news__title {
    font-size: 3.2rem;
  }

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

  .filter-bar {
    padding: 0.75rem 1rem;
    gap: 0.65rem;
  }

  .filter-bar__label {
    font-size: 0.95rem;
    padding: 0.5rem 1.5rem;
  }

  .page-news .section-title {
    font-size: 2rem;
  }

  .insights-grid {
    grid-template-columns: 1fr 1fr;
  }

  .index-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .timeline {
    padding-left: 3rem;
  }

  .timeline-item__dot {
    left: calc(-3rem + 6px + var(--news-timeline-line-width) / 2);
  }

  .timeline-item__content {
    padding: 1.5rem 2rem;
  }

  .timeline-section__img-wrap {
    margin-bottom: 2rem;
  }

  .insights-section__img-wrap {
    margin-bottom: 2rem;
  }

  .index-section__img-wrap {
    margin-bottom: 1.8rem;
  }
}

@media (min-width: 1024px) {
  .page-news__hero {
    padding: 4rem 2rem 3rem;
  }

  .page-news__title {
    font-size: 4rem;
  }

  .page-news__subtitle {
    font-size: 1.25rem;
  }

  .filter-bar {
    gap: 0.75rem;
    padding: 1rem 0;
  }

  .filter-bar__label {
    font-size: 1rem;
    padding: 0.55rem 1.8rem;
  }

  .filter-bar__icon {
    width: 48px;
  }

  .page-news .section-title {
    font-size: 2.2rem;
  }

  .timeline-item__title {
    font-size: 1.35rem;
  }

  .insight-card__title {
    font-size: 1.3rem;
  }

  .index-category {
    padding: 1.4rem 1.6rem;
  }

  .page-news__cross-nav {
    gap: 1rem;
  }

  .page-news .btn-outline {
    padding: 0.65rem 2rem;
    font-size: 0.95rem;
  }
}

/* 确保窄屏不横向溢出 */
@media (max-width: 420px) {
  .page-news__hero {
    padding: 1.8rem 0.75rem 1.5rem;
  }

  .page-news__title {
    font-size: 2rem;
  }

  .page-news__subtitle {
    font-size: 0.85rem;
  }

  .filter-bar {
    gap: 0.4rem;
    padding: 0.5rem 0.25rem;
  }

  .filter-bar__label {
    font-size: 0.78rem;
    padding: 0.35rem 0.9rem;
  }

  .filter-bar__icon {
    width: 28px;
  }

  .page-news .section-title {
    font-size: 1.4rem;
  }

  .timeline {
    padding-left: 1.6rem;
  }

  .timeline-item__dot {
    left: calc(-1.6rem + 6px + var(--news-timeline-line-width) / 2);
    width: 12px;
    height: 12px;
  }

  .timeline-item__content {
    padding: 1rem 1.2rem;
  }

  .timeline-item__title {
    font-size: 1.05rem;
  }

  .index-grid {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .insights-grid {
    gap: 1rem;
  }

  .page-news__cross-nav {
    flex-direction: column;
    align-items: stretch;
  }

  .page-news .btn-outline {
    justify-content: center;
  }
}