/* ===== 行业观察页 · 专属样式 ===== */
.page-news {
  --clr-deep-blue: #0a1f3d;
  --clr-bright-orange: #ff7a00;
  --clr-electric-purple: #8a2be2;
  --clr-cyber-green: #00ff87;
  --clr-deep-black: #0d0d0d;
  --clr-light-gray: #e0e0e0;
  --clr-mid-gray: #888;
  --clr-warning-red: #ff3366;
  --clr-white: #fff;
  --font-sans: 'Inter','Noto Sans SC','Helvetica Neue',sans-serif;
  --font-head: 'Inter','Noto Sans SC','Helvetica Neue','Segoe UI',sans-serif;
  --font-mono: 'JetBrains Mono','Fira Code',monospace;
  --border-radius: 6px;
  --transition: 0.3s cubic-bezier(.25,.46,.45,.94);

  display: block;
  max-width: 1440px;
  margin: 0 auto;
  padding: 1rem 1rem 2.5rem;
  background: var(--clr-deep-blue);
  color: var(--clr-light-gray);
  font-family: var(--font-sans);
  line-height: 1.6;
}

/* ---- 面包屑 ---- */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--clr-mid-gray);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(138,43,226,0.25);
}
.page-news .breadcrumb a {
  color: var(--clr-bright-orange);
  text-decoration: none;
  transition: color var(--transition);
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  color: var(--clr-cyber-green);
  text-decoration: underline;
}
.page-news .breadcrumb span[aria-current="page"] {
  color: var(--clr-white);
  font-weight: 500;
}

/* ---- 页面标题 ---- */
.page-news .page-header {
  margin-bottom: 1.75rem;
}
.page-news .page-header h1 {
  font-family: var(--font-head);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  color: var(--clr-white);
  margin: 0 0 0.3rem;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--clr-bright-orange), var(--clr-electric-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-news .page-subtitle {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: var(--clr-mid-gray);
  margin: 0;
  max-width: 640px;
  line-height: 1.5;
}

/* ---- 共享区块标签 ---- */
.page-news .section-label {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-white);
  letter-spacing: 0.06em;
  margin: 0 0 0.75rem;
  padding-left: 0.5rem;
  border-left: 3px solid var(--clr-cyber-green);
  text-transform: uppercase;
}

/* ===== 分类索引 ===== */
.page-news .classification {
  margin-bottom: 2rem;
}
.page-news .tag-list {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.25rem 0 0.75rem;
  scrollbar-width: thin;
  scrollbar-color: var(--clr-electric-purple) transparent;
  -webkit-overflow-scrolling: touch;
}
.page-news .tag-list::-webkit-scrollbar {
  height: 4px;
}
.page-news .tag-list::-webkit-scrollbar-thumb {
  background: var(--clr-electric-purple);
  border-radius: 4px;
}
.page-news .tag {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--clr-light-gray);
  background: rgba(138,43,226,0.12);
  border: 1px solid rgba(138,43,226,0.3);
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  user-select: none;
}
.page-news .tag:hover {
  background: rgba(138,43,226,0.25);
  border-color: var(--clr-electric-purple);
}
.page-news .tag.active {
  background: var(--clr-bright-orange);
  border-color: var(--clr-bright-orange);
  color: var(--clr-deep-black);
  font-weight: 600;
  box-shadow: 0 0 12px rgba(255,122,0,0.35);
}
.page-news .tag:focus-visible {
  outline: 2px solid var(--clr-cyber-green);
  outline-offset: 2px;
}

/* ===== 主布局 ===== */
.page-news .news-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* ---- 侧边栏 ---- */
.page-news .news-sidebar {
  order: 2;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 1.25rem 1rem;
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(138,43,226,0.2);
  border-radius: var(--border-radius);
}
/* 时间轴 */
.page-news .timeline-block {
  margin-bottom: 0.5rem;
}
.page-news .timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-left: 1.25rem;
}
.page-news .timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--clr-cyber-green), var(--clr-electric-purple), var(--clr-bright-orange));
  border-radius: 2px;
}
.page-news .timeline-item {
  position: relative;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}
.page-news .tl-dot {
  flex-shrink: 0;
  width: 12px;
  height: 12px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--clr-cyber-green);
  border: 2px solid var(--clr-deep-blue);
  box-shadow: 0 0 0 2px var(--clr-cyber-green);
  z-index: 1;
  transition: transform var(--transition);
}
.page-news .timeline-item:hover .tl-dot {
  transform: scale(1.25);
  box-shadow: 0 0 12px var(--clr-cyber-green);
}
.page-news .tl-content {
  flex: 1;
  min-width: 0;
}
.page-news .tl-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.5rem;
  background: rgba(0,255,135,0.15);
  color: var(--clr-cyber-green);
  border-radius: 4px;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
}
.page-news .tl-content p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--clr-light-gray);
  line-height: 1.45;
}
/* 侧边栏链接 */
.page-news .sidebar-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-news .sidebar-links a {
  color: var(--clr-mid-gray);
  font-size: 0.85rem;
  text-decoration: none;
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
  transition: all var(--transition);
  display: block;
  border-left: 2px solid transparent;
}
.page-news .sidebar-links a:hover,
.page-news .sidebar-links a:focus-visible {
  color: var(--clr-bright-orange);
  background: rgba(255,122,0,0.08);
  border-left-color: var(--clr-bright-orange);
  padding-left: 0.75rem;
}

/* ---- 主内容区（瀑布流） ---- */
.page-news .news-main {
  order: 1;
}
.page-news .news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

/* ===== 文章卡片 ===== */
.page-news .news-card {
  display: flex;
  flex-direction: column;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(138,43,226,0.18);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: all var(--transition);
  cursor: default;
  position: relative;
}
.page-news .news-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  border: 1px solid transparent;
  transition: border-color var(--transition);
}
.page-news .news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(138,43,226,0.2);
  background: rgba(255,255,255,0.07);
}
.page-news .news-card:hover::after {
  border-color: rgba(0,255,135,0.3);
}
.page-news .card-img {
  width: 100%;
  aspect-ratio: 400 / 250;
  overflow: hidden;
  background: rgba(0,0,0,0.3);
  position: relative;
}
.page-news .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease, filter 0.4s ease;
}
.page-news .news-card:hover .card-img img {
  transform: scale(1.03);
  filter: brightness(1.1);
}
.page-news .card-body {
  padding: 1rem 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}
.page-news .card-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.7rem;
  background: color-mix(in srgb, var(--tag-clr, var(--clr-bright-orange)) 20%, transparent);
  color: var(--tag-clr, var(--clr-bright-orange));
  border: 1px solid color-mix(in srgb, var(--tag-clr, var(--clr-bright-orange)) 40%, transparent);
  border-radius: 999px;
  text-transform: uppercase;
  transition: background var(--transition);
}
.page-news .news-card:hover .card-tag {
  background: color-mix(in srgb, var(--tag-clr, var(--clr-bright-orange)) 30%, transparent);
}
.page-news .card-title {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-white);
  margin: 0.15rem 0 0.2rem;
  line-height: 1.35;
  transition: color var(--transition);
}
.page-news .news-card:hover .card-title {
  color: var(--clr-bright-orange);
}
.page-news .card-summary {
  font-size: 0.85rem;
  color: var(--clr-mid-gray);
  line-height: 1.55;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: all var(--transition);
}
.page-news .news-card:hover .card-summary {
  -webkit-line-clamp: 8;
  color: var(--clr-light-gray);
}

/* 纯文本卡片（无图）调整 */
.page-news .news-card:not(:has(.card-img)) .card-body {
  padding-top: 1.25rem;
}
.page-news .news-card:not(:has(.card-img))::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--tag-clr, var(--clr-bright-orange)), transparent);
  opacity: 0.6;
}

/* ---- 加载占位 ---- */
.page-news .scroll-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.5rem 0;
  opacity: 0.5;
}
.page-news .loader-line {
  display: block;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--clr-cyber-green), transparent);
  border-radius: 4px;
  animation: loader-pulse 1.5s ease-in-out infinite;
}
.page-news .loader-text {
  font-size: 0.72rem;
  color: var(--clr-mid-gray);
  letter-spacing: 0.06em;
}
@keyframes loader-pulse {
  0%, 100% { opacity: 0.3; transform: scaleX(0.7); }
  50% { opacity: 1; transform: scaleX(1); }
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-news {
    padding: 1.5rem 2rem 3rem;
  }
  .page-news .breadcrumb {
    font-size: 0.85rem;
    margin-bottom: 1.75rem;
  }
  .page-news .page-header {
    margin-bottom: 2rem;
  }
  .page-news .classification {
    margin-bottom: 2.5rem;
  }
  .page-news .tag-list {
    gap: 0.75rem;
  }
  .page-news .tag {
    font-size: 0.88rem;
    padding: 0.45rem 1.2rem;
  }
  .page-news .news-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 2.5rem;
  }
  .page-news .news-sidebar {
    order: 0;
    width: 260px;
    min-width: 260px;
    position: sticky;
    top: 1rem;
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
    padding: 1.5rem 1.25rem;
  }
  .page-news .news-main {
    order: 0;
    flex: 1;
    min-width: 0;
  }
  .page-news .news-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
  .page-news .card-body {
    padding: 1rem 1.2rem 1.3rem;
  }
  .page-news .card-title {
    font-size: 1.05rem;
  }
  .page-news .card-summary {
    font-size: 0.88rem;
  }
  .page-news .scroll-loading {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1200px) {
  .page-news {
    padding: 2rem 2.5rem 4rem;
  }
  .page-news .news-sidebar {
    width: 290px;
    min-width: 290px;
  }
  .page-news .news-grid {
    gap: 1.75rem;
  }
  .page-news .card-body {
    padding: 1.15rem 1.35rem 1.45rem;
  }
  .page-news .card-title {
    font-size: 1.1rem;
  }
}

/* ===== 过滤交互（渐进增强） ===== */
.page-news .news-card[data-filter] {
  display: flex;
}
.page-news .tag.active ~ .tag-list .tag[data-filter] {
  /* 纯展示，实际过滤由JS处理 */
}

/* ===== 减少动画偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-news *,
  .page-news *::before,
  .page-news *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .page-news .news-card:hover {
    transform: none;
  }
  .page-news .news-card:hover .card-img img {
    transform: none;
    filter: none;
  }
  .page-news .tl-dot:hover {
    transform: none;
  }
}

/* ===== 滚动条美化（侧边栏） ===== */
.page-news .news-sidebar::-webkit-scrollbar {
  width: 4px;
}
.page-news .news-sidebar::-webkit-scrollbar-track {
  background: transparent;
}
.page-news .news-sidebar::-webkit-scrollbar-thumb {
  background: var(--clr-electric-purple);
  border-radius: 4px;
}

.page-news {
  --tag-clr: transparent;
}