.page-news {
  --pn-bg: var(--color-primary-bg, #0B1E36);
  --pn-accent: var(--color-primary-accent, #FF6B35);
  --pn-green: var(--color-secondary-accent, #39FF14);
  --pn-text: var(--color-text-primary, #FFFFFF);
  --pn-text-secondary: var(--color-text-secondary, #B0BEC5);
  --pn-card-bg: var(--color-card-bg, #132A45);
  --pn-border: var(--color-border, #2A4A6A);
  --pn-gap: 1.5rem;
  --pn-radius: 8px;
  --pn-transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --pn-font-heading: var(--font-heading, 'Montserrat', 'Helvetica Neue', 'Arial Black', sans-serif);
  --pn-font-body: var(--font-body, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif);

  position: relative;
  background-color: var(--pn-bg);
  color: var(--pn-text);
  font-family: var(--pn-font-body);
  padding: 2rem 0 4rem;
  min-height: 100vh;
  overflow: hidden;
}

/* 动态背景：城市天际线夜景 */
.page-news__bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: url({zhanqunpic:h:1080w:1920});
  background-size: cover;
  background-position: center 30%;
  background-repeat: no-repeat;
  opacity: 0.12;
  mix-blend-mode: luminosity;
}

.page-news .container {
  position: relative;
  z-index: 1;
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 0 1rem;
}

/* 面包屑 */
.page-news__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--pn-text-secondary);
  margin-bottom: 0.5rem;
  padding: 0.5rem 0;
}
.page-news__breadcrumb a {
  color: var(--pn-accent);
  text-decoration: none;
  transition: opacity var(--pn-transition);
}
.page-news__breadcrumb a:hover {
  opacity: 0.8;
}
.page-news__breadcrumb-sep {
  color: var(--pn-border);
  font-weight: 300;
}
.page-news__breadcrumb [aria-current="page"] {
  color: var(--pn-text-secondary);
  font-weight: 400;
}

/* 主标题区 */
.page-news__title {
  font-family: var(--pn-font-heading);
  font-weight: 900;
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  letter-spacing: -0.02em;
  color: var(--pn-text);
  margin: 0 0 0.25rem;
  line-height: 1.1;
  text-transform: uppercase;
}
.page-news__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--pn-text-secondary);
  margin: 0 0 2rem;
  max-width: 600px;
  line-height: 1.5;
}

/* 过滤器标签栏 */
.page-news__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--pn-border);
}
.page-news__filter-btn {
  font-family: var(--pn-font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 1.25rem;
  background: transparent;
  color: var(--pn-text-secondary);
  border: 2px solid var(--pn-border);
  border-radius: var(--pn-radius);
  cursor: pointer;
  transition: all var(--pn-transition);
  position: relative;
}
.page-news__filter-btn:hover {
  border-color: var(--pn-accent);
  color: var(--pn-text);
}
.page-news__filter-btn--active {
  background: var(--pn-accent);
  border-color: var(--pn-accent);
  color: var(--pn-bg);
  font-weight: 700;
  box-shadow: 0 0 20px rgba(255, 107, 53, 0.25);
}

/* 通用节标题 */
.page-news__section-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--pn-font-heading);
  font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  color: var(--pn-text);
  margin: 0 0 0.25rem;
  line-height: 1.2;
}
.page-news__section-title-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  color: var(--pn-accent);
  font-size: 1.8rem;
  line-height: 1;
  flex-shrink: 0;
}
.page-news__icon-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 2.2rem;
  max-height: 2.2rem;
  object-fit: contain;
  filter: brightness(0) saturate(100%) invert(58%) sepia(95%) saturate(749%) hue-rotate(0deg) brightness(102%) contrast(106%);
}
.page-news__section-desc {
  font-size: 1rem;
  color: var(--pn-text-secondary);
  margin: 0 0 1.5rem;
  padding-left: 0.5rem;
}
.page-news__section {
  margin-bottom: 4rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--pn-border);
}
.page-news__section:first-of-type {
  border-top: none;
  padding-top: 0;
}

/* 最新动态列表 */
.page-news__updates-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.page-news__update-item {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(19, 42, 69, 0.5);
  border-radius: var(--pn-radius);
  border-left: 3px solid var(--pn-border);
  transition: all var(--pn-transition);
  font-size: 1rem;
  line-height: 1.5;
}
.page-news__update-item:hover {
  border-left-color: var(--pn-accent);
  background: rgba(19, 42, 69, 0.8);
  transform: translateX(4px);
}
.page-news__update-time {
  flex-shrink: 0;
  font-family: var(--pn-font-heading);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--pn-green);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  min-width: 4.5rem;
}
.page-news__update-badge {
  flex-shrink: 0;
  font-size: 0.65rem;
  padding: 0.15rem 0.5rem;
  background: var(--pn-accent);
  color: var(--pn-bg);
  font-weight: 700;
  border-radius: 3px;
  text-transform: uppercase;
}
.page-news__update-text {
  color: var(--pn-text);
  flex: 1;
}

/* 使用心得网格 */
.page-news__tips-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.page-news__tip-card {
  background: var(--pn-card-bg);
  border: 1px solid var(--pn-border);
  border-radius: var(--pn-radius);
  padding: 1.5rem;
  transition: all var(--pn-transition);
  position: relative;
  overflow: hidden;
}
.page-news__tip-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--pn-accent), var(--pn-green));
  opacity: 0;
  transition: opacity var(--pn-transition);
}
.page-news__tip-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  border-color: var(--pn-accent);
}
.page-news__tip-card:hover::after {
  opacity: 1;
}
.page-news__tip-title {
  font-family: var(--pn-font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--pn-text);
  margin: 0 0 0.5rem;
}
.page-news__tip-summary {
  font-size: 0.95rem;
  color: var(--pn-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* 案例合集网格 */
.page-news__cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.page-news__case-card {
  background: var(--pn-card-bg);
  border: 1px solid var(--pn-border);
  border-radius: var(--pn-radius);
  overflow: hidden;
  transition: all var(--pn-transition);
  display: flex;
  flex-direction: column;
}
.page-news__case-card:hover {
  transform: scale(1.01);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
  border-color: var(--pn-accent);
}
.page-news__case-img-wrapper {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--pn-bg);
}
.page-news__case-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--pn-transition);
}
.page-news__case-card:hover .page-news__case-img {
  transform: scale(1.05);
}
.page-news__case-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-news__case-title {
  font-family: var(--pn-font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--pn-text);
  margin: 0;
  line-height: 1.3;
}
.page-news__case-summary {
  font-size: 0.9rem;
  color: var(--pn-text-secondary);
  line-height: 1.5;
  margin: 0;
  flex: 1;
}
.page-news__case-badge {
  align-self: flex-start;
  font-size: 0.7rem;
  padding: 0.2rem 0.75rem;
  background: rgba(255, 107, 53, 0.15);
  color: var(--pn-accent);
  border: 1px solid var(--pn-accent);
  border-radius: 3px;
  font-weight: 600;
  text-transform: uppercase;
}

/* 底部CTA */
.page-news__cta {
  margin-top: 3rem;
  padding: 2rem 1.5rem;
  text-align: center;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.08), rgba(57, 255, 20, 0.04));
  border: 1px solid var(--pn-border);
  border-radius: var(--pn-radius);
}
.page-news__cta-text {
  font-family: var(--pn-font-heading);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--pn-text);
  margin: 0 0 1.25rem;
}
.page-news__cta-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}
.page-news .btn {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  background: var(--pn-accent);
  color: var(--pn-bg);
  font-family: var(--pn-font-body);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: var(--pn-radius);
  transition: all var(--pn-transition);
  border: 2px solid var(--pn-accent);
  cursor: pointer;
  text-align: center;
}
.page-news .btn:hover {
  transform: scale(1.04);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.3);
}
.page-news .btn--outline {
  background: transparent;
  color: var(--pn-accent);
  border-color: var(--pn-accent);
}
.page-news .btn--outline:hover {
  background: var(--pn-accent);
  color: var(--pn-bg);
}

/* ===== 响应式 ===== */
/* 移动端优先已实现，桌面增强 */
@media (min-width: 640px) {
  .page-news__tips-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-news__cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-news__update-item {
    font-size: 1.05rem;
    padding: 0.9rem 1.25rem;
  }
  .page-news__section {
    padding: 2rem 0;
  }
}

@media (min-width: 960px) {
  .page-news {
    padding: 3rem 0 5rem;
  }
  .page-news__tips-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-news__cases-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  .page-news__title {
    font-size: 4rem;
  }
  .page-news__subtitle {
    font-size: 1.3rem;
  }
  .page-news__filter {
    gap: 1rem;
    margin-bottom: 3.5rem;
  }
  .page-news__filter-btn {
    font-size: 1rem;
    padding: 0.6rem 1.5rem;
  }
  .page-news__section {
    margin-bottom: 5rem;
    padding: 2.5rem 0;
  }
  .page-news__updates-list {
    gap: 1rem;
  }
  .page-news__cta {
    padding: 2.5rem 2rem;
  }
}

@media (min-width: 1200px) {
  .page-news__cases-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-news .container {
    padding: 0 2rem;
  }
}

/* 辅助：卡片微光效（叠加在.card上） */
.page-news .card {
  position: relative;
  overflow: hidden;
}
.page-news .card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(255, 107, 53, 0.04), transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.page-news .card > * {
  position: relative;
  z-index: 1;
}

/* 标签筛选交互（纯展示，JS 增强） */
.page-news__section {
  transition: opacity var(--pn-transition);
}

/* 时间戳动画模拟 */
@keyframes pulse-recent {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
.page-news__update-item[data-timestamp="recent"] .page-news__update-time {
  animation: pulse-recent 2.5s ease-in-out infinite;
}

/* 首屏主图不延迟 */
.page-news__bg {
  content-visibility: auto;
}
</PAGE_CSS>