/* ===== 文章中心页面专属样式 ===== */
.page-news {
  --page-news-filter-bg: #1E1E1E;
  --page-news-card-shadow: 0 4px 20px rgba(0,0,0,0.4);
  --page-news-card-hover-shadow: 0 8px 40px rgba(0,0,0,0.6);
  --page-news-tag-orange: #FF6B35;
  --page-news-tag-blue: #00D4FF;
  --page-news-tag-green: #00FF87;
  --page-news-timeline-line: rgba(255,255,255,0.1);
  --page-news-timeline-dot: #FF6B35;
  --page-news-border-subtle: rgba(255,255,255,0.08);
  --page-news-border-medium: rgba(255,255,255,0.15);
  --page-news-radius: 6px;
  --page-news-transition: 300ms ease;
}

/* 页面顶部横幅 */
.page-news__hero {
  position: relative;
  width: 100%;
  overflow: hidden;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.page-news__hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.2);
}

.page-news__hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(18,18,18,0.85) 0%, rgba(18,18,18,0.4) 100%);
}

.page-news__hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem 1rem;
}

.page-news__hero-title {
  font-family: var(--font-headings);
  font-size: var(--size-h1);
  color: var(--color-white);
  margin: 0 0 0.5rem;
  letter-spacing: 0.02em;
}

.page-news__hero-desc {
  font-family: var(--font-body);
  font-size: var(--size-body);
  color: var(--color-metallic-silver);
  margin: 0;
  max-width: 600px;
  margin-inline: auto;
  line-height: 1.6;
}

/* 面包屑 */
.page-news .breadcrumb {
  padding: 0 1rem;
  margin-bottom: 1.5rem;
  max-width: var(--max-width);
  margin-inline: auto;
  width: 100%;
}

.page-news .breadcrumb ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: var(--size-small);
  color: var(--color-metallic-silver);
}

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

.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus {
  opacity: 0.8;
  text-decoration: underline;
}

.page-news .breadcrumb [aria-current="page"] {
  color: var(--color-white);
  font-weight: 600;
}

/* 分类筛选栏 */
.page-news__filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0 1rem;
  margin-bottom: 2rem;
  max-width: var(--max-width);
  margin-inline: auto;
  width: 100%;
}

.page-news__filter-btn {
  background: var(--page-news-filter-bg);
  border: 1px solid var(--page-news-border-medium);
  color: var(--color-light-gray);
  font-family: var(--font-body);
  font-size: var(--size-small);
  padding: 0.5rem 1rem;
  border-radius: var(--page-news-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.page-news__filter-btn:hover,
.page-news__filter-btn:focus {
  background: rgba(255,107,53,0.15);
  border-color: var(--color-vibrant-orange);
  color: var(--color-white);
  outline: none;
}

.page-news__filter-btn--active {
  background: var(--color-vibrant-orange);
  border-color: var(--color-vibrant-orange);
  color: var(--color-white);
  font-weight: 600;
}

/* 通用板块 */
.page-news__section {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: 0 1rem 2.5rem;
  width: 100%;
}

.page-news__section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--page-news-border-subtle);
}

.page-news__section-title {
  font-family: var(--font-headings);
  font-size: var(--size-h2);
  color: var(--color-white);
  margin: 0;
  letter-spacing: 0.01em;
}

.page-news__section-badge {
  font-family: var(--font-data);
  font-size: var(--size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: rgba(255,107,53,0.15);
  color: var(--color-vibrant-orange);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  border: 1px solid rgba(255,107,53,0.3);
}

/* 卡片网格 — 首页精选 */
.page-news__card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-news__card-grid--featured {
  grid-template-columns: 1fr;
}

.page-news__card-grid--guide {
  grid-template-columns: 1fr;
}

/* 卡片基础 */
.page-news__card {
  background: var(--color-card-bg);
  border: 1px solid var(--page-news-border-subtle);
  border-radius: var(--page-news-radius);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--page-news-transition), transform var(--page-news-transition), border-color var(--page-news-transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.page-news__card:hover,
.page-news__card:focus-within {
  box-shadow: var(--page-news-card-hover-shadow);
  border-color: rgba(255,107,53,0.3);
  transform: translateY(-2px);
}

.page-news__card--large {
  grid-column: 1 / -1;
}

@media (min-width: 640px) {
  .page-news__card--large {
    grid-column: auto;
  }
}

/* 卡片标签（斜切角） */
.page-news__card-tag {
  position: absolute;
  top: 0;
  right: 0;
  font-family: var(--font-data);
  font-size: var(--size-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.75rem;
  clip-path: polygon(12% 0%, 100% 0%, 100% 100%, 0% 100%);
  color: var(--color-white);
  font-weight: 600;
  z-index: 2;
}

.page-news__card-tag--brand {
  background: var(--page-news-tag-orange);
}

.page-news__card-tag--update {
  background: var(--page-news-tag-blue);
}

.page-news__card-tag--guide {
  background: var(--page-news-tag-green);
}

/* 卡片图标 */
.page-news__card-icon {
  width: 50px;
  height: 50px;
  object-fit: contain;
  margin-bottom: 0.75rem;
  border-radius: 4px;
  background: rgba(255,255,255,0.05);
  padding: 0.25rem;
}

/* 卡片标题 */
.page-news__card-title {
  font-family: var(--font-headings);
  font-size: var(--size-h3);
  color: var(--color-white);
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

/* 卡片摘要 */
.page-news__card-summary {
  font-family: var(--font-body);
  font-size: var(--size-body);
  color: var(--color-metallic-silver);
  margin: 0 0 1rem;
  line-height: 1.6;
  flex: 1;
}

/* 卡片链接 */
.page-news__card-link {
  font-family: var(--font-body);
  font-size: var(--size-small);
  color: var(--color-vibrant-orange);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: gap var(--transition-fast);
  align-self: flex-start;
}

.page-news__card-link:hover,
.page-news__card-link:focus {
  gap: 0.5rem;
  text-decoration: underline;
  outline: none;
}

/* 时间轴板块 */
.page-news__timeline {
  position: relative;
  padding-left: 1.5rem;
}

.page-news__timeline::before {
  content: '';
  position: absolute;
  left: 0.5rem;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--page-news-timeline-line);
}

.page-news__timeline-item {
  position: relative;
  padding-bottom: 2rem;
  padding-left: 1.5rem;
}

.page-news__timeline-item:last-child {
  padding-bottom: 0;
}

.page-news__timeline-marker {
  position: absolute;
  left: -1.5rem;
  top: 0.4rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--page-news-timeline-dot);
  border: 2px solid var(--color-sidebar-bg);
  box-shadow: 0 0 0 2px var(--page-news-timeline-dot);
  z-index: 1;
}

.page-news__timeline-content {
  background: var(--color-card-bg);
  border: 1px solid var(--page-news-border-subtle);
  border-radius: var(--page-news-radius);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--page-news-transition), border-color var(--page-news-transition);
}

.page-news__timeline-content:hover {
  box-shadow: var(--page-news-card-hover-shadow);
  border-color: rgba(0,212,255,0.25);
}

.page-news__timeline-date {
  font-family: var(--font-data);
  font-size: var(--size-xs);
  color: var(--color-neon-blue);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 0.25rem;
}

.page-news__timeline-heading {
  font-family: var(--font-headings);
  font-size: var(--size-h3);
  color: var(--color-white);
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.page-news__timeline-text {
  font-family: var(--font-body);
  font-size: var(--size-body);
  color: var(--color-metallic-silver);
  margin: 0 0 0.75rem;
  line-height: 1.6;
}

.page-news__timeline-media {
  margin: 0.75rem 0;
  border-radius: 4px;
  overflow: hidden;
}

.page-news__timeline-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  object-fit: cover;
}

/* 指南卡片特殊布局 */
.page-news__card--guide {
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}

.page-news__card-img-wrap {
  width: 100%;
  max-height: 220px;
  overflow: hidden;
  background: var(--color-deep-gray);
}

.page-news__card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--page-news-transition);
}

.page-news__card--guide:hover .page-news__card-img {
  transform: scale(1.03);
}

.page-news__card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* CTA板块 */
.page-news__section--cta {
  padding-bottom: 3rem;
}

.page-news__cta-inner {
  background: linear-gradient(135deg, rgba(255,107,53,0.12) 0%, rgba(0,212,255,0.08) 100%);
  border: 1px solid rgba(255,107,53,0.2);
  border-radius: var(--page-news-radius);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.page-news__cta-title {
  font-family: var(--font-headings);
  font-size: var(--size-h2);
  color: var(--color-white);
  margin: 0 0 0.5rem;
}

.page-news__cta-text {
  font-family: var(--font-body);
  font-size: var(--size-body);
  color: var(--color-metallic-silver);
  margin: 0 0 1.25rem;
  line-height: 1.6;
}

.page-news .btn-cta {
  display: inline-block;
  background: var(--color-vibrant-orange);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: var(--size-body);
  font-weight: 600;
  padding: 0.75rem 2rem;
  border: none;
  border-radius: var(--page-news-radius);
  text-decoration: none;
  transition: background var(--transition-fast), transform var(--transition-fast);
  cursor: pointer;
}

.page-news .btn-cta:hover,
.page-news .btn-cta:focus {
  background: #e55a2b;
  transform: translateY(-1px);
  outline: 2px solid var(--color-neon-blue);
  outline-offset: 2px;
}

/* ===== 响应式：平板及以上 ===== */
@media (min-width: 640px) {
  .page-news__hero {
    min-height: 260px;
  }

  .page-news__hero-content {
    padding: 3rem 2rem;
  }

  .page-news__filter-bar {
    gap: 0.75rem;
  }

  .page-news__filter-btn {
    padding: 0.6rem 1.25rem;
    font-size: var(--size-body);
  }

  .page-news__card-grid--featured {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-news__card-grid--guide {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-news__card--large:first-child {
    grid-column: 1 / -1;
  }

  .page-news__timeline {
    padding-left: 2.5rem;
  }

  .page-news__timeline::before {
    left: 1rem;
  }

  .page-news__timeline-marker {
    left: -2.5rem;
    width: 14px;
    height: 14px;
  }

  .page-news__timeline-content {
    padding: 1.5rem;
  }

  .page-news__cta-inner {
    padding: 2.5rem 2rem;
  }
}

/* ===== 响应式：桌面 ===== */
@media (min-width: 1024px) {
  .page-news__hero {
    min-height: 300px;
  }

  .page-news__hero-content {
    padding: 4rem 2rem;
  }

  .page-news__card-grid--featured {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-news__card-grid--guide {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-news__card--large:first-child {
    grid-column: auto;
  }

  .page-news__section {
    padding: 0 1.5rem 3rem;
  }

  .page-news__timeline-item {
    padding-left: 2rem;
  }

  .page-news__cta-inner {
    padding: 3rem 2.5rem;
  }
}

/* ===== 移动端窄屏保护 ===== */
@media (max-width: 480px) {
  .page-news__hero-title {
    font-size: 1.75rem;
  }

  .page-news__section-title {
    font-size: 1.5rem;
  }

  .page-news__card-title {
    font-size: 1.25rem;
  }

  .page-news__timeline {
    padding-left: 1.25rem;
  }

  .page-news__timeline-marker {
    left: -1.25rem;
    width: 10px;
    height: 10px;
  }

  .page-news__card-tag {
    font-size: 0.65rem;
    padding: 0.2rem 0.6rem;
  }

  .page-news__filter-btn {
    font-size: var(--size-xs);
    padding: 0.4rem 0.75rem;
  }

  .page-news__card-img-wrap {
    max-height: 180px;
  }
}