/* ===== 品牌更新页专属样式 ===== */
.page-news {
  --news-sidebar-w: 220px;
  --news-gold: var(--color-accent);
  --news-card-shadow: 0 4px 20px rgba(0,0,0,0.06);
  --news-card-border: rgba(0,0,0,0.07);
  --news-card-radius: 8px;
  --news-transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  --news-sidebar-bg: #ffffff;
  --news-hero-overlay: linear-gradient(135deg, rgba(204,41,54,0.85) 0%, rgba(30,144,255,0.70) 100%);
  --news-filter-active-bg: rgba(204,41,54,0.10);
  --news-filter-hover-bg: rgba(30,144,255,0.06);
  --news-card-bg: #ffffff;
  --news-body-line: 1.7;
  --news-goldbar-w: 5px;
}

/* ---- 面包屑 ---- */
.page-news .breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-sm) var(--space-sm) 0;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text);
  opacity: 0.7;
}
.page-news .breadcrumb a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: opacity 0.2s;
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus {
  opacity: 0.75;
  text-decoration: underline;
}
.page-news .breadcrumb__sep {
  margin: 0 0.35em;
  color: var(--color-text);
  opacity: 0.4;
}

/* ---- 顶部横幅 ---- */
.page-news__hero {
  position: relative;
  max-width: var(--max-width);
  margin: var(--space-sm) auto 0;
  border-radius: var(--news-card-radius);
  overflow: hidden;
  box-shadow: var(--news-card-shadow);
}
.page-news__hero-img {
  display: block;
  width: 100%;
  height: 240px;
  object-fit: cover;
  object-position: center 30%;
}
.page-news__hero-overlay {
  position: absolute;
  inset: 0;
  background: var(--news-hero-overlay);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-md);
  text-align: center;
}
.page-news__hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 6vw, 3.6rem);
  color: var(--color-text-light);
  margin: 0 0 0.15em;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.1;
}
.page-news__hero-desc {
  font-family: var(--font-body);
  font-size: clamp(0.95rem, 2.2vw, 1.25rem);
  color: var(--color-text-light);
  opacity: 0.92;
  margin: 0;
  letter-spacing: 0.08em;
}

/* ---- 布局容器 ---- */
.page-news__layout {
  position: relative;
  max-width: var(--max-width);
  margin: var(--space-md) auto;
  padding: 0 var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* ---- 侧边栏 ---- */
.page-news__sidebar {
  flex-shrink: 0;
  background: var(--news-sidebar-bg);
  border-radius: var(--news-card-radius);
  box-shadow: var(--news-card-shadow);
  border: 1px solid var(--news-card-border);
  padding: var(--space-sm) var(--space-sm);
}
.page-news__sidebar-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--color-primary);
  margin: 0 0 var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--news-gold);
  letter-spacing: 0.04em;
}
.page-news__filter-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}
.page-news__filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 40px;
  cursor: pointer;
  transition: background var(--news-transition), border-color var(--news-transition), box-shadow var(--news-transition);
  user-select: none;
}
.page-news__filter-btn:hover {
  background: var(--news-filter-hover-bg);
  border-color: rgba(30,144,255,0.20);
}
.page-news__filter-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 4px;
}
.page-news__sidebar-hint {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text);
  opacity: 0.45;
  margin: var(--space-sm) 0 0;
  text-align: center;
}

/* ---- radio 筛选逻辑 ---- */
#filter-all:checked ~ .page-news__content .page-news__section { display: block; }
#filter-feature:checked ~ .page-news__content .page-news__section[data-category]:not([data-category="feature"]) { display: none; }
#filter-tip:checked ~ .page-news__content .page-news__section[data-category]:not([data-category="tip"]) { display: none; }
#filter-insight:checked ~ .page-news__content .page-news__section[data-category]:not([data-category="insight"]) { display: none; }

/* 选中态 */
#filter-all:checked ~ .page-news__sidebar .page-news__filter-btn--all,
#filter-feature:checked ~ .page-news__sidebar .page-news__filter-btn--feature,
#filter-tip:checked ~ .page-news__sidebar .page-news__filter-btn--tip,
#filter-insight:checked ~ .page-news__sidebar .page-news__filter-btn--insight {
  background: var(--news-filter-active-bg);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(204,41,54,0.20);
  color: var(--color-primary);
}

/* ---- 内容区 ---- */
.page-news__content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* ---- Section ---- */
.page-news__section {
  scroll-margin-top: 100px;
}
.page-news__section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  color: var(--color-text);
  margin: 0 0 var(--space-md);
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  line-height: 1.2;
}
.page-news__section-title-num {
  font-family: var(--font-number);
  font-size: 0.7em;
  color: var(--news-gold);
  opacity: 0.7;
  letter-spacing: 0.05em;
}

/* ---- 卡片列表 ---- */
.page-news__card-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* ---- 单张卡片 ---- */
.page-news__card {
  display: flex;
  background: var(--news-card-bg);
  border-radius: var(--news-card-radius);
  box-shadow: var(--news-card-shadow);
  border: 1px solid var(--news-card-border);
  overflow: hidden;
  transition: box-shadow var(--news-transition), transform var(--news-transition);
}
.page-news__card:hover {
  box-shadow: 0 8px 32px rgba(0,0,0,0.10);
  transform: translateY(-2px);
}
.page-news__card-goldbar {
  flex-shrink: 0;
  width: var(--news-goldbar-w);
  background: var(--news-gold);
  align-self: stretch;
}
.page-news__card-body {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  min-width: 0;
}
.page-news__card-details {
  display: block;
}
.page-news__card-summary-toggle {
  list-style: none;
  display: block;
  cursor: pointer;
  padding: 0;
  transition: opacity var(--news-transition);
}
.page-news__card-summary-toggle::-webkit-details-marker {
  display: none;
}
.page-news__card-summary-toggle:hover {
  opacity: 0.85;
}
.page-news__card-summary-toggle:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 4px;
  border-radius: 4px;
}
.page-news__card-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-xs) var(--space-sm);
  margin-bottom: var(--space-xs);
}
.page-news__card-title {
  font-family: var(--font-heading);
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  color: var(--color-text);
  margin: 0;
  line-height: 1.3;
  letter-spacing: 0.01em;
}
.page-news__card-date {
  font-family: var(--font-number);
  font-size: 0.8rem;
  color: var(--color-text);
  opacity: 0.45;
  white-space: nowrap;
  letter-spacing: 0.04em;
}
.page-news__card-summary {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  opacity: 0.75;
  margin: 0;
  line-height: var(--news-body-line);
}
.page-news__card-detail {
  padding-top: var(--space-sm);
  border-top: 1px dashed rgba(0,0,0,0.08);
  margin-top: var(--space-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: var(--news-body-line);
  color: var(--color-text);
}
.page-news__card-detail p {
  margin: 0 0 var(--space-sm);
}
.page-news__card-detail p:last-child {
  margin-bottom: 0;
}
.page-news__card-detail .btn {
  margin-top: var(--space-xs);
}

/* ---- 技巧卡片增强 ---- */
.page-news__card--featured .page-news__card-goldbar {
  background: var(--color-secondary);
  width: var(--news-goldbar-w);
}
.page-news__tip-media {
  margin: 0 0 var(--space-sm);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.page-news__tip-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 280px;
  object-fit: cover;
}
.page-news__tip-steps {
  padding-left: 1.5em;
  margin: 0 0 var(--space-sm);
  font-family: var(--font-body);
  line-height: var(--news-body-line);
}
.page-news__tip-steps li {
  margin-bottom: var(--space-xs);
}
.page-news__tip-list {
  padding-left: 1.5em;
  margin: 0 0 var(--space-sm);
  font-family: var(--font-body);
  line-height: var(--news-body-line);
}
.page-news__tip-list li {
  margin-bottom: var(--space-xs);
}
.page-news__highlight {
  color: var(--news-gold);
  font-weight: 600;
}
.page-news__num {
  font-family: var(--font-number);
  color: var(--color-primary);
  font-size: 1.1em;
}

/* ---- 行业观察卡片 ---- */
.page-news__card--wide .page-news__card-goldbar {
  background: var(--color-primary);
  width: var(--news-goldbar-w);
}
.page-news__insight-media {
  margin: 0 0 var(--space-sm);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.page-news__insight-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 240px;
  object-fit: cover;
}

/* ---- 按钮覆盖 ---- */
.page-news .btn--outline {
  border: 1px solid var(--color-secondary);
  color: var(--color-secondary);
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: 0.45em 1.2em;
  border-radius: 40px;
  transition: background var(--news-transition), color var(--news-transition), box-shadow var(--news-transition);
  text-decoration: none;
  display: inline-block;
}
.page-news .btn--outline:hover,
.page-news .btn--outline:focus {
  background: var(--color-secondary);
  color: var(--color-text-light);
  box-shadow: 0 4px 14px rgba(30,144,255,0.30);
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-news .breadcrumb {
    padding: var(--space-md) var(--space-md) 0;
  }
  .page-news__hero-img {
    height: 300px;
  }
  .page-news__hero-overlay {
    padding: var(--space-lg);
  }
  .page-news__layout {
    flex-direction: row;
    align-items: flex-start;
    padding: 0 var(--space-md);
    gap: var(--space-lg);
  }
  .page-news__sidebar {
    position: sticky;
    top: calc(var(--header-height) + 20px);
    width: var(--news-sidebar-w);
    padding: var(--space-md);
    flex-shrink: 0;
  }
  .page-news__filter-list {
    flex-direction: column;
    gap: 6px;
  }
  .page-news__filter-btn {
    width: 100%;
    border-radius: 8px;
    padding: var(--space-xs) var(--space-sm);
  }
  .page-news__sidebar-hint {
    text-align: left;
  }
  .page-news__card-body {
    padding: var(--space-md) var(--space-lg);
  }
  .page-news__card-header {
    flex-wrap: nowrap;
  }
  .page-news__tip-img {
    max-height: 360px;
  }
  .page-news__insight-img {
    max-height: 320px;
  }
  .page-news__section {
    scroll-margin-top: 120px;
  }
}

@media (min-width: 1024px) {
  .page-news__sidebar {
    width: 240px;
  }
  .page-news__card-body {
    padding: var(--space-md) calc(var(--space-lg) * 1.2);
  }
}

/* ===== 桌面端 侧边栏图标尺寸还原 ===== */
@media (min-width: 768px) {
  .page-news__filter-icon {
    width: 28px;
    height: 28px;
  }
}