/* ============================================================
   page-news – 文章中心页面专属样式
   作用域：.page-news（仅限当前页面）
   ============================================================ */
.page-news {
  --news-hero-bg: var(--primary, #0a2540);
  --news-hero-text: #ffffff;
  --news-accent: var(--secondary, #f5c518);
  --news-accent-alt: var(--accent, #ff6b35);
  --news-card-bg: var(--surface, #ffffff);
  --news-card-border: var(--border, #d0d4de);
  --news-card-shadow: 0 4px 20px var(--shadow, rgba(10,37,64,0.15));
  --news-grid-gap: 1.5rem;
  --news-radius: 8px;
  --card-min-width: 280px;
  --card-max-width: 1fr;
  --filter-btn-radius: 40px;
  --transition-fast: 0.25s cubic-bezier(0.25,0.46,0.45,0.94);
  --transition-smooth: 0.4s cubic-bezier(0.25,0.46,0.45,0.94);

  /* 背景纹理 — 极淡网格 */
  background-image:
    linear-gradient(rgba(10,37,64,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10,37,64,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center center;
}

/* ----- 首屏区 ----- */
.page-news .news-hero {
  background: var(--news-hero-bg);
  color: var(--news-hero-text);
  padding: 2.5rem 1.25rem 2.8rem;
  position: relative;
  overflow: hidden;
}

/* 斜线装饰（首屏右下） */
.page-news .news-hero::after {
  content: '';
  position: absolute;
  right: -60px;
  bottom: -30px;
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, transparent 49.5%, rgba(245,197,24,0.12) 50%, transparent 50.5%);
  background-size: 40px 40px;
  transform: rotate(15deg);
  pointer-events: none;
}

.page-news .news-breadcrumb {
  font: var(--font-small, 300 0.875rem/1.5 'Inter','Noto Sans SC',sans-serif);
  color: rgba(255,255,255,0.65);
  margin-bottom: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

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

.page-news .news-breadcrumb a:hover {
  color: var(--news-accent-alt);
  text-decoration: underline;
}

.page-news .breadcrumb-sep {
  font-size: 0.75rem;
  opacity: 0.6;
}

.page-news .news-hero-title {
  font: var(--font-heading, 800 clamp(2.5rem,5vw,4rem)/1.1 'Inter','Noto Sans SC',sans-serif);
  color: var(--news-hero-text);
  margin: 0 0 1.5rem;
  letter-spacing: -0.02em;
  max-width: 720px;
}

.page-news .hero-sub {
  display: block;
  font-size: 0.5em;
  font-weight: 400;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.06em;
  margin-top: 0.2rem;
}

/* ----- 筛选按钮组 ----- */
.page-news .news-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.page-news .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font: var(--font-small, 300 0.875rem/1.5 'Inter','Noto Sans SC',sans-serif);
  font-weight: 500;
  color: rgba(255,255,255,0.9);
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.35);
  border-radius: var(--filter-btn-radius);
  padding: 0.45rem 1.2rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.page-news .filter-btn:hover {
  border-color: var(--news-accent);
  color: var(--news-accent);
  background: rgba(245,197,24,0.08);
}

.page-news .filter-btn.is-active {
  background: var(--news-accent);
  color: var(--news-hero-bg);
  border-color: var(--news-accent);
  font-weight: 600;
  box-shadow: 0 2px 12px rgba(245,197,24,0.35);
}

.page-news .filter-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}

/* ----- 文章列表区 ----- */
.page-news .news-list {
  padding: 2.5rem 1.25rem 3rem;
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.page-news .news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--news-grid-gap);
  transition: all var(--transition-smooth);
}

/* ----- 文章卡片 ----- */
.page-news .news-card {
  position: relative;
  background: var(--news-card-bg);
  border-radius: var(--news-radius);
  box-shadow: var(--news-card-shadow);
  overflow: hidden;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
  display: flex;
  flex-direction: column;
  border-left: 4px solid var(--news-accent);
  cursor: default;
}

.page-news .news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(10,37,64,0.12);
}

/* 斜线装饰（卡片右上） */
.page-news .card-slash-deco {
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 49.8%, rgba(245,197,24,0.10) 50.2%, transparent 50.6%);
  pointer-events: none;
  z-index: 1;
}

/* 卡片图片 */
.page-news .card-image-wrap {
  width: 100%;
  overflow: hidden;
  aspect-ratio: 300 / 180;
  background: var(--bg, #f2f4f8);
  position: relative;
}

.page-news .card-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.5s ease;
}

.page-news .news-card:hover .card-img {
  transform: scale(1.04);
}

/* 无图片卡片 */
.page-news .card-body.no-img {
  padding-top: 1.8rem;
}

/* 卡片主体 */
.page-news .card-body {
  padding: 1.25rem 1.5rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 2;
}

.page-news .card-title {
  font: var(--font-body, 400 1rem/1.6 'Inter','Noto Sans SC',sans-serif);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text-primary, #1a1a2e);
  margin: 0 0 0.5rem;
  line-height: 1.35;
}

.page-news .card-summary {
  font: var(--font-small, 300 0.875rem/1.5 'Inter','Noto Sans SC',sans-serif);
  color: var(--text-secondary, #5a5a7a);
  margin: 0 0 1rem;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.page-news .card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 0.25rem;
}

.page-news .card-tag {
  display: inline-block;
  font: var(--font-small, 300 0.875rem/1.5 'Inter','Noto Sans SC',sans-serif);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--news-accent);
  background: rgba(245,197,24,0.12);
  padding: 0.15rem 0.65rem;
  border-radius: 20px;
  letter-spacing: 0.02em;
}

.page-news .card-updated {
  font: var(--font-small, 300 0.875rem/1.5 'Inter','Noto Sans SC',sans-serif);
  font-size: 0.75rem;
  color: var(--text-secondary, #5a5a7a);
}

/* 金色竖条（装饰） */
.page-news .card-accent-bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--news-accent);
  border-radius: 0 2px 2px 0;
  pointer-events: none;
}

/* ----- 空状态 ----- */
.page-news .news-empty {
  text-align: center;
  padding: 3rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.page-news .empty-graphic {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: var(--bg, #f2f4f8);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.page-news .empty-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0.6;
}

.page-news .empty-text {
  font: var(--font-body, 400 1rem/1.6 'Inter','Noto Sans SC',sans-serif);
  color: var(--text-secondary, #5a5a7a);
  max-width: 360px;
}

/* ----- 底部资源引导 ----- */
.page-news .news-resources {
  padding: 2rem 1.25rem 3.5rem;
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.page-news .resources-inner {
  border-top: 2px solid var(--news-accent);
  padding-top: 1.5rem;
}

.page-news .resources-heading {
  font: var(--font-body, 400 1rem/1.6 'Inter','Noto Sans SC',sans-serif);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary, #1a1a2e);
  margin: 0 0 0.75rem;
  letter-spacing: 0.04em;
}

.page-news .resources-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2rem;
}

.page-news .resource-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font: var(--font-small, 300 0.875rem/1.5 'Inter','Noto Sans SC',sans-serif);
  color: var(--text-secondary, #5a5a7a);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: 0.2rem 0;
}

.page-news .resource-link:hover {
  color: var(--news-accent);
}

.page-news .resource-icon {
  color: var(--news-accent-alt);
  font-weight: 700;
  transition: transform var(--transition-fast);
}

.page-news .resource-link:hover .resource-icon {
  transform: translateX(4px);
}

/* ============================================================
   响应式：平板 ≥ 640px
   ============================================================ */
@media (min-width: 640px) {
  .page-news .news-hero {
    padding: 3rem 2rem 3.2rem;
  }

  .page-news .news-hero-title {
    margin-bottom: 1.75rem;
  }

  .page-news .news-list {
    padding: 3rem 2rem 4rem;
  }

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

  .page-news .news-resources {
    padding: 2.5rem 2rem 4rem;
  }
}

/* ============================================================
   响应式：桌面 ≥ 1024px
   ============================================================ */
@media (min-width: 1024px) {
  .page-news .news-hero {
    padding: 3.5rem 3rem 3.8rem;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 2rem;
  }

  .page-news .news-breadcrumb {
    grid-column: 1 / -1;
  }

  .page-news .news-hero-title {
    margin-bottom: 0;
    max-width: 600px;
  }

  .page-news .news-filters {
    justify-content: flex-end;
    flex-shrink: 0;
  }

  .page-news .news-list {
    padding: 3.5rem 3rem 5rem;
  }

  .page-news .news-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
  }

  /* 宽卡片跨2列 */
  .page-news .news-card.is-wide {
    grid-column: span 2;
  }

  .page-news .news-card.is-wide .card-image-wrap {
    aspect-ratio: 600 / 180;
  }

  .page-news .card-title {
    font-size: 1.2rem;
  }

  .page-news .card-summary {
    -webkit-line-clamp: 4;
  }

  .page-news .news-resources {
    padding: 3rem 3rem 5rem;
  }

  .page-news .resources-links {
    gap: 2rem 3rem;
  }

  .page-news .resource-link {
    font-size: 0.95rem;
  }
}

/* ============================================================
   响应式：大桌面 ≥ 1280px
   ============================================================ */
@media (min-width: 1280px) {
  .page-news .news-hero {
    padding: 4rem calc((100% - var(--max-width, 1280px)) / 2) 4.2rem;
  }

  .page-news .news-list {
    padding-left: calc((100% - var(--max-width, 1280px)) / 2);
    padding-right: calc((100% - var(--max-width, 1280px)) / 2);
  }

  .page-news .news-resources {
    padding-left: calc((100% - var(--max-width, 1280px)) / 2);
    padding-right: calc((100% - var(--max-width, 1280px)) / 2);
  }

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

/* ============================================================
   交互：筛选切换（配合 JS 渐进增强）
   ============================================================ */
.page-news .news-card[data-filter] {
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

/* 无 JS 时全部显示；JS 驱动时通过 data-filter-active 控制隐藏 */
.page-news .news-grid[data-filter-active] .news-card[data-filter] {
  opacity: 1;
  transform: translateY(0);
}

/* 空状态默认隐藏，JS 可切换显示 */
.page-news .news-empty[hidden] {
  display: none;
}

/* ============================================================
   辅助：减少运动偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .page-news *,
  .page-news *::before,
  .page-news *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-news .news-card:hover {
    transform: none;
  }

  .page-news .news-card:hover .card-img {
    transform: none;
  }
}

/* ============================================================
   打印样式
   ============================================================ */
@media print {
  .page-news .news-hero {
    background: #fff !important;
    color: #000 !important;
    padding: 1rem 0;
  }

  .page-news .news-hero-title {
    color: #000 !important;
  }

  .page-news .filter-btn {
    border-color: #ccc;
    color: #333;
  }

  .page-news .filter-btn.is-active {
    background: #eee;
    color: #000;
  }

  .page-news .news-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .page-news .news-card:hover {
    transform: none;
  }

  .page-news .news-resources {
    display: none;
  }

  .page-news .news-hero::after {
    display: none;
  }
}