/* ===== 文章中心 page-news 专属样式 ===== */
.page-news {
  --news-gap: 1.5rem;
  --news-radius: 0.75rem;
  --news-glow: 0 0 1.5rem rgba(0, 212, 255, 0.25);
  --news-card-bg: var(--c-card, #1A1A2E);
  --news-text: var(--c-text, #FFFFFF);
  --news-text-muted: var(--c-text-muted, #B0B0B0);
  --news-primary: var(--c-primary, #00D4FF);
  --news-accent: var(--c-accent, #FF6B00);
  --news-border: var(--c-border, rgba(0,212,255,0.4));
  --news-gradient: var(--gradient, linear-gradient(135deg, #00D4FF, #FF6B00));
  --news-font-heading: var(--font-heading, Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif);
  --news-font-body: var(--font-body, 'Noto Sans SC', 'Inter', system-ui, sans-serif);
  --news-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ---------- 框景标题区 ---------- */
.page-news__hero {
  padding-top: calc(var(--header-h, 4rem) + 2rem);
  padding-bottom: 1rem;
}

.page-news__hero-frame {
  position: relative;
  border: 2px solid var(--news-border);
  background: var(--news-card-bg);
  padding: 2.5rem 2rem;
  box-shadow: inset 0 0 2rem rgba(0, 212, 255, 0.08), var(--news-glow);
  transform: skewX(-1deg);
}

.page-news__hero-frame > * {
  transform: skewX(1deg);
}

.page-news__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--news-font-body);
  font-size: 0.85rem;
  color: var(--news-text-muted);
  margin-bottom: 1rem;
}

.page-news__breadcrumb a {
  color: var(--news-primary);
  text-decoration: none;
  transition: color var(--news-transition);
}

.page-news__breadcrumb a:hover {
  color: var(--news-accent);
}

.page-news__breadcrumb-sep {
  color: var(--news-text-muted);
  opacity: 0.5;
}

.page-news__hero-title {
  font-family: var(--news-font-heading);
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-style: italic;
  line-height: 1;
  color: var(--news-text);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0 0 0.5rem;
  background: var(--news-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-news__hero-desc {
  font-family: var(--news-font-body);
  font-size: clamp(1rem, 2vw, 1.35rem);
  color: var(--news-text-muted);
  margin: 0;
  letter-spacing: 0.06em;
}

/* ---------- 分类标签导航 ---------- */
.page-news__tags-section {
  padding-top: 0.5rem;
  padding-bottom: 1rem;
}

.page-news__tags-wrap {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  background: var(--news-card-bg);
  border: 1px solid var(--news-border);
  padding: 0.75rem 1.25rem;
  border-radius: var(--news-radius);
  box-shadow: var(--news-glow);
}

.page-news__tags-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--news-border);
}

.page-news__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
}

.page-news__tag {
  font-family: var(--news-font-body);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.4rem 1rem;
  border: 1px solid var(--news-border);
  border-radius: 2rem;
  background: transparent;
  color: var(--news-text-muted);
  cursor: pointer;
  transition: all var(--news-transition);
  white-space: nowrap;
  letter-spacing: 0.04em;
}

.page-news__tag:hover {
  border-color: var(--news-primary);
  color: var(--news-primary);
  box-shadow: 0 0 0.75rem rgba(0, 212, 255, 0.2);
  transform: translateY(-2px);
}

.page-news__tag.is-active {
  background: var(--news-gradient);
  border-color: transparent;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 0 1rem rgba(255, 107, 0, 0.3);
}

/* ---------- 瀑布流文章网格 ---------- */
.page-news__grid-section {
  padding-top: 0.5rem;
  padding-bottom: 2rem;
}

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

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

.page-news__card:hover {
  transform: scale(1.02);
  box-shadow: 0 0 2.5rem rgba(0, 212, 255, 0.3);
  border-color: var(--news-primary);
}

.page-news__card-img {
  width: 100%;
  overflow: hidden;
  position: relative;
  aspect-ratio: 4 / 3;
  background: #0a0a1a;
}

.page-news__card-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  display: block;
}

.page-news__card:hover .page-news__card-thumb {
  transform: scale(1.08);
}

.page-news__card-body {
  padding: 1.25rem 1.5rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-news__card-tag {
  display: inline-block;
  font-family: var(--news-font-body);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.75rem;
  border-radius: 1rem;
  white-space: nowrap;
  align-self: flex-start;
  border: 1px solid transparent;
}

.page-news__card-tag--tips {
  color: var(--news-primary);
  border-color: var(--news-primary);
  background: rgba(0, 212, 255, 0.08);
}

.page-news__card-tag--news {
  color: var(--news-accent);
  border-color: var(--news-accent);
  background: rgba(255, 107, 0, 0.08);
}

.page-news__card-tag--update {
  color: #a78bfa;
  border-color: #a78bfa;
  background: rgba(167, 139, 250, 0.08);
}

.page-news__card-title {
  font-family: var(--news-font-heading);
  font-style: italic;
  line-height: 1.2;
  color: var(--news-text);
  margin: 0;
  letter-spacing: 0.01em;
}

.page-news__card--wide .page-news__card-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
}

.page-news__card--narrow .page-news__card-title {
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
}

.page-news__card-excerpt {
  font-family: var(--news-font-body);
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--news-text-muted);
  margin: 0;
  flex: 1;
}

.page-news__inline-link {
  color: var(--news-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--news-transition);
}

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

.page-news__card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--news-font-body);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--news-primary);
  text-decoration: none;
  margin-top: 0.5rem;
  transition: color var(--news-transition), gap var(--news-transition);
}

.page-news__card-link:hover {
  color: var(--news-accent);
  gap: 0.7rem;
}

/* ---------- 背景装饰氛围区 ---------- */
.page-news__atmosphere {
  padding-top: 0;
  padding-bottom: 0;
  overflow: hidden;
}

.page-news__atmosphere-inner {
  position: relative;
  width: 100%;
  height: clamp(240px, 40vw, 480px);
  overflow: hidden;
  border-radius: var(--news-radius);
  border: 1px solid var(--news-border);
}

.page-news__atmosphere-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-news__atmosphere-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.25), rgba(255, 107, 0, 0.15), rgba(13, 13, 13, 0.7));
  z-index: 1;
}

.page-news__atmosphere-content {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 2rem;
  text-align: center;
}

.page-news__atmosphere-label {
  font-family: var(--news-font-heading);
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-style: italic;
  color: #fff;
  text-shadow: 0 0 2rem rgba(0, 212, 255, 0.6);
  letter-spacing: 0.06em;
  line-height: 1;
}

.page-news__atmosphere-slogan {
  font-family: var(--news-font-body);
  font-size: clamp(0.9rem, 2vw, 1.4rem);
  color: var(--news-text-muted);
  letter-spacing: 0.12em;
  text-shadow: 0 0 1rem rgba(0, 0, 0, 0.8);
}

/* ===== 桌面端（≥768px） ===== */
@media (min-width: 768px) {
  .page-news__hero {
    padding-top: calc(var(--header-h, 4rem) + 3rem);
    padding-bottom: 1.5rem;
  }

  .page-news__hero-frame {
    padding: 3.5rem 3rem;
  }

  .page-news__tags-wrap {
    padding: 0.85rem 1.5rem;
  }

  .page-news__tag {
    font-size: 0.95rem;
    padding: 0.45rem 1.2rem;
  }

  .page-news__grid {
    grid-template-columns: repeat(3, 1fr);
    grid-auto-flow: dense;
  }

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

  /* 窄卡片占 1 列 */
  .page-news__card--narrow {
    grid-column: span 1;
  }

  /* 让宽卡片在左右之间交替：第 4 张宽卡片从第 2 列开始 */
  .page-news__card--wide:nth-of-type(2) {
    grid-column: 2 / span 2;
  }

  /* 其余宽卡片默认从第 1 列开始 */
  .page-news__card--wide:nth-of-type(1) {
    grid-column: 1 / span 2;
  }

  .page-news__card--wide:nth-of-type(3) {
    grid-column: 1 / span 2;
  }

  /* 确保窄卡片在宽卡片旁正确排列 */
  .page-news__card--narrow:nth-of-type(1) {
    grid-column: 3;
  }

  .page-news__card--narrow:nth-of-type(2) {
    grid-column: 1;
  }

  .page-news__card--narrow:nth-of-type(3) {
    grid-column: 3;
  }

  .page-news__card--narrow:nth-of-type(4) {
    grid-column: 1;
  }

  .page-news__card--wide .page-news__card-body {
    padding: 1.5rem 2rem 2rem;
  }

  .page-news__card--narrow .page-news__card-body {
    padding: 1rem 1.25rem 1.25rem;
  }

  .page-news__atmosphere-inner {
    height: clamp(300px, 35vw, 520px);
    border-radius: calc(var(--news-radius) * 1.2);
  }
}

/* ===== 桌面大屏（≥1024px） ===== */
@media (min-width: 1024px) {
  .page-news__hero-frame {
    padding: 4rem 4rem;
  }

  .page-news__hero-title {
    font-size: clamp(4rem, 6vw, 5.5rem);
  }

  .page-news__grid {
    gap: 1.75rem;
  }

  .page-news__card--wide .page-news__card-body {
    padding: 1.75rem 2.25rem 2.25rem;
  }

  .page-news__card-excerpt {
    font-size: 0.95rem;
  }

  .page-news__atmosphere-inner {
    height: clamp(360px, 30vw, 560px);
  }
}

/* ===== 极窄屏保护（≤420px） ===== */
@media (max-width: 420px) {
  .page-news__hero-frame {
    padding: 1.5rem 1rem;
  }

  .page-news__tags-wrap {
    padding: 0.6rem 0.85rem;
    gap: 0.75rem;
  }

  .page-news__tags {
    gap: 0.4rem;
  }

  .page-news__tag {
    font-size: 0.75rem;
    padding: 0.3rem 0.75rem;
  }

  .page-news__card-body {
    padding: 1rem 1rem 1.25rem;
  }

  .page-news__card-excerpt {
    font-size: 0.82rem;
  }

  .page-news__atmosphere-inner {
    height: 200px;
  }
}

/* ===== 动效减少兼容 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-news__card,
  .page-news__card-thumb,
  .page-news__tag,
  .page-news__card-link,
  .page-news__inline-link,
  .page-news__breadcrumb a {
    transition: none !important;
    transform: none !important;
  }

  .page-news__card:hover {
    transform: none !important;
  }

  .page-news__card:hover .page-news__card-thumb {
    transform: none !important;
  }

  .page-news__tag:hover {
    transform: none !important;
  }
}

/* ===== 滚动显现占位（无 JS 时完全可见） ===== */
[data-reveal] {
  opacity: 1;
  transform: none;
}