/* ===== 页面专属：page-news ===== */
.page-news {
  --pn-bg: #0D1117;
  --pn-surface-alt: #142433;
  --pn-accent: #39FF14;
  --pn-accent-dim: rgba(57,255,20,0.3);
  --pn-accent-glow: rgba(57,255,20,0.15);
  --pn-text: #E0EFFC;
  --pn-text-muted: #8899AA;
  --pn-border: #2C3E50;
  --pn-card-bg-1: #0F1C28;
  --pn-card-bg-2: #1A2A3A;
  --pn-radius: 8px;
  --pn-gap: 1.5rem;
  --pn-max-width: 1400px;

  display: block;
  position: relative;
  background: var(--pn-bg);
  color: var(--pn-text);
  font-family: var(--font-body, 'Inter', sans-serif);
  line-height: 1.5;
  padding: 0 env(safe-area-inset-right, 1rem) 0 env(safe-area-inset-left, 1rem);
}

/* ---- 背景装饰 ---- */
.page-news__backdrop {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 5% 10%, rgba(57,255,20,0.04) 0%, transparent 50%),
    radial-gradient(circle at 95% 40%, rgba(255,107,53,0.05) 0%, transparent 50%);
  z-index: 0;
}

.page-news__inner {
  position: relative;
  z-index: 1;
  max-width: var(--pn-max-width);
  margin: 0 auto;
  padding: var(--gap-lg, 1.2rem) 0 var(--gap-xl, 2.5rem);
}

/* ---- 页面标题区 ---- */
.page-news__page-header {
  margin-bottom: var(--gap-lg, 1.2rem);
  padding: 0 0 0.5rem;
}

.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--pn-text-muted);
  margin-bottom: 0.5rem;
}

.page-news .breadcrumb a {
  color: var(--pn-accent);
  text-decoration: none;
  border-bottom: 1px dotted transparent;
  transition: border-color var(--transition-fast, 0.2s);
}

.page-news .breadcrumb a:hover {
  border-bottom-color: var(--pn-accent);
}

.page-news__page-title {
  font-family: var(--font-headline, 'Exo 2', sans-serif);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--pn-text);
  margin: 0 0 0.3rem;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.page-news__page-desc {
  font-size: 1rem;
  color: var(--pn-text-muted);
  margin: 0 0 var(--gap-md, 1rem);
  max-width: 600px;
}

.page-news .divider-slash {
  height: 3px;
  background: linear-gradient(135deg, var(--pn-accent) 40%, var(--clr-accent1, #FF6B35) 80%);
  width: 100%;
  border-radius: 2px;
  margin-bottom: var(--gap-lg, 1.2rem);
}

/* ---- 布局：筛选栏 + 文章区 ---- */
.page-news__layout {
  display: flex;
  flex-direction: column;
  gap: var(--gap-lg, 1.2rem);
}

/* ===== 筛选栏 ===== */
.page-news__filter-bar {
  flex: 0 0 auto;
  width: 100%;
  background: var(--pn-surface-alt);
  border-radius: var(--pn-radius);
  padding: var(--gap-md, 1rem);
  position: relative;
  overflow: hidden;
}

.page-news__filter-visual {
  margin-bottom: var(--gap-sm, 0.5rem);
  border-radius: var(--pn-radius);
  overflow: hidden;
}

.page-news__filter-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  max-width: 100%;
}

.page-news__filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news__filter-btn {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--pn-text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.3rem 0.1rem;
  position: relative;
  transition: color var(--transition-fast, 0.2s);
  white-space: nowrap;
}

.page-news__filter-btn::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--pn-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base, 0.3s);
}

.page-news__filter-btn:hover,
.page-news__filter-btn.is-active {
  color: var(--pn-accent);
}

.page-news__filter-btn.is-active::after {
  transform: scaleX(1);
}

.page-news__filter-line {
  display: none;
}

/* ===== 文章区域 ===== */
.page-news__articles {
  flex: 1 1 auto;
  min-width: 0;
}

.page-news__section {
  margin-bottom: var(--gap-xl, 2.5rem);
}

.page-news__section:last-child {
  margin-bottom: 0;
}

.page-news__section-title {
  font-family: var(--font-headline, 'Exo 2', sans-serif);
  font-weight: 700;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--pn-text);
  margin: 0 0 var(--gap-md, 1rem);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-news__section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.2em;
  background: var(--pn-accent);
  border-radius: 2px;
}

/* ---- 卡片网格 ---- */
.page-news__card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pn-gap);
}

.page-news__card {
  background: var(--pn-card-bg-1);
  border-radius: var(--pn-radius);
  padding: var(--gap-md, 1rem);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: transform var(--transition-base, 0.3s), box-shadow var(--transition-base, 0.3s);
  clip-path: polygon(0 0, calc(100% - 0) 0, 100% 0, 100% calc(100% - 0), calc(100% - 0) 100%, 0 100%, 0 calc(100% - 0));
  border: 1px solid var(--pn-border);
  position: relative;
}

.page-news__card:nth-child(2n) {
  background: var(--pn-card-bg-2);
}

.page-news__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(57,255,20,0.12);
  border-color: var(--pn-accent-dim);
}

.page-news__card-visual {
  border-radius: 6px;
  overflow: hidden;
}

.page-news__card img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-news__card-title {
  font-family: var(--font-headline, 'Exo 2', sans-serif);
  font-weight: 700;
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--pn-text);
  margin: 0;
  line-height: 1.3;
  font-style: italic;
}

.page-news__card-excerpt {
  font-size: 0.9rem;
  color: var(--pn-text-muted);
  margin: 0;
  line-height: 1.5;
  flex: 1;
}

.page-news__card-meta {
  font-family: var(--font-caption, 'Inter', sans-serif);
  font-size: 0.75rem;
  color: var(--pn-text-muted);
  opacity: 0.7;
}

.page-news__card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--pn-accent);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s);
  align-self: flex-start;
}

.page-news__card-link:hover {
  color: var(--clr-accent1, #FF6B35);
}

.page-news__arrow {
  transition: transform var(--transition-fast, 0.2s);
}

.page-news__card-link:hover .page-news__arrow {
  transform: translateX(3px);
}

/* ---- 底部引导 ---- */
.page-news__cta-area {
  margin-top: var(--gap-xl, 2.5rem);
  padding: var(--gap-md, 1rem) 0;
  text-align: left;
}

.page-news .page-news__cta-area .divider-slash {
  margin-bottom: var(--gap-md, 1rem);
}

.page-news__cta-text {
  font-size: 0.95rem;
  color: var(--pn-text-muted);
}

.page-news__cta-text a {
  color: var(--pn-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-news__cta-text a:hover {
  color: var(--clr-accent1, #FF6B35);
}

/* ===== 桌面端布局 ===== */
@media (min-width: 768px) {
  .page-news__layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-news__filter-bar {
    flex: 0 0 220px;
    position: sticky;
    top: calc(var(--header-height, 56px) + 1rem);
    align-self: flex-start;
    padding: var(--pn-gap);
  }

  .page-news__filter-list {
    flex-direction: column;
    gap: 0.3rem 0;
  }

  .page-news__filter-btn {
    padding: 0.4rem 0.2rem;
    font-size: 1rem;
    width: 100%;
    text-align: left;
  }

  .page-news__filter-btn::after {
    bottom: 0;
    height: 100%;
    width: 2px;
    left: auto;
    right: 0;
    transform: scaleY(0);
    transform-origin: top;
  }

  .page-news__filter-btn.is-active::after {
    transform: scaleY(1);
  }

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

  .page-news__card--wide {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    grid-template-rows: auto 1fr auto;
    gap: var(--gap-md, 1rem);
  }

  .page-news__card--wide .page-news__card-visual {
    grid-row: 1 / 4;
  }

  .page-news__card--narrow {
    display: flex;
    flex-direction: column;
  }

  .page-news__card--narrow .page-news__card-visual {
    margin-bottom: 0.2rem;
  }

  .page-news__section-title {
    font-size: clamp(1.3rem, 2.5vw, 2rem);
  }
}

@media (min-width: 1200px) {
  .page-news__card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-news__card--wide {
    grid-column: span 2;
  }
}