.page-news {
  --page-bg: var(--bg-dark, #0B0E16);
  --page-surface: var(--surface-dark, #131724);
  --page-card-bg: var(--card-dark, #1A1F30);
  --page-neon: var(--neon-green, #39FF14);
  --page-blue: var(--electric-blue, #00D4FF);
  --page-gold: var(--metal-gold, #FFD700);
  --page-text: var(--text-primary, #FFFFFF);
  --page-text-secondary: var(--text-secondary, #B0B8D1);
  --page-border: var(--border-subtle, #2A2F45);
  --page-glow: var(--hover-glow, rgba(57,255,20,0.3));
  --page-font-heading: 'Montserrat', 'Noto Sans SC', sans-serif;
  --page-font-body: 'Inter', 'Noto Sans SC', sans-serif;
  --page-sidebar-width: 200px;
  --page-gap: 24px;

  display: block;
  max-width: 100%;
  padding: 16px;
  background: var(--page-bg);
  color: var(--page-text);
  font-family: var(--page-font-body);
  line-height: 1.6;
}

/* ===== 面包屑 ===== */
.page-news__breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.8rem;
  color: var(--page-text-secondary);
  letter-spacing: 0.04em;
}
.page-news__breadcrumb a {
  color: var(--page-blue);
  text-decoration: none;
  transition: color 0.2s;
}
.page-news__breadcrumb a:hover,
.page-news__breadcrumb a:focus {
  color: var(--page-neon);
}
.page-news__breadcrumb-sep {
  color: var(--page-border);
}
.page-news__breadcrumb [aria-current="page"] {
  color: var(--page-gold);
  font-weight: 600;
}

/* ===== 首屏标题区 ===== */
.page-news__hero {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 28px;
  padding: 20px 16px;
  background: var(--page-surface);
  border: 1px solid var(--page-border);
  box-shadow: inset 0 0 0 1px var(--page-border);
}
.page-news__hero-icon {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: 4px;
}
.page-news__hero-text {
  flex: 1;
  min-width: 0;
}
.page-news__title {
  margin: 0 0 4px;
  font-family: var(--page-font-heading);
  font-weight: 900;
  font-size: 1.6rem;
  letter-spacing: 0.08em;
  color: var(--page-text);
  text-transform: uppercase;
}
.page-news__subtitle {
  margin: 0;
  font-size: 0.9rem;
  color: var(--page-text-secondary);
  letter-spacing: 0.06em;
}

/* ===== 筛选标签 ===== */
.page-news__filters {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  margin-bottom: 28px;
  padding-bottom: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--page-border) transparent;
}
.page-news__filters::-webkit-scrollbar {
  height: 4px;
}
.page-news__filters::-webkit-scrollbar-thumb {
  background: var(--page-border);
  border-radius: 2px;
}
.page-news__filter-btn {
  flex-shrink: 0;
  padding: 6px 18px;
  font-family: var(--page-font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--page-text-secondary);
  background: transparent;
  border: 1px solid var(--page-border);
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.page-news__filter-btn:hover,
.page-news__filter-btn:focus {
  color: var(--page-neon);
  border-color: var(--page-neon);
  box-shadow: 0 0 8px var(--page-glow);
}
.page-news__filter-btn.is-active {
  color: var(--page-bg);
  background: var(--page-neon);
  border-color: var(--page-neon);
  box-shadow: 0 0 12px var(--page-glow);
}

/* ===== 左右布局 ===== */
.page-news__layout {
  display: flex;
  flex-direction: column;
  gap: var(--page-gap);
}

/* ===== 侧边栏 ===== */
.page-news__sidebar {
  display: none;
  flex-shrink: 0;
  width: 100%;
  padding: 20px 16px;
  background: var(--page-surface);
  border: 1px solid var(--page-border);
  box-shadow: inset 0 0 0 1px var(--page-border);
}
.page-news__sidebar-title {
  margin: 0 0 16px;
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--page-gold);
  text-transform: uppercase;
}
.page-news__sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-news__sidebar-link {
  display: block;
  padding: 8px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--page-text-secondary);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: all 0.2s;
}
.page-news__sidebar-link:hover,
.page-news__sidebar-link:focus {
  color: var(--page-neon);
  border-left-color: var(--page-neon);
  background: rgba(57,255,20,0.05);
}

/* ===== 内容区 ===== */
.page-news__content {
  flex: 1;
  min-width: 0;
}

/* ===== 内容区块 ===== */
.page-news__section {
  margin-bottom: 36px;
}
.page-news__section-title {
  margin: 0 0 18px;
  font-family: var(--page-font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  color: var(--page-text);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--page-border);
  position: relative;
}
.page-news__section-title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--page-neon);
}

/* ===== 卡片网格 ===== */
.page-news__card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

/* ===== 单张卡片 ===== */
.page-news__card {
  display: flex;
  flex-direction: column;
  background: var(--page-card-bg);
  border: 1px solid var(--page-border);
  box-shadow: inset 0 0 0 1px var(--page-border);
  transition: all 0.3s ease;
  overflow: hidden;
}
.page-news__card:hover,
.page-news__card:focus-within {
  border-color: var(--page-neon);
  box-shadow: inset 0 0 0 1px var(--page-neon), 0 0 20px var(--page-glow);
  transform: translateY(-2px);
}
.page-news__card-img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
  border-bottom: 1px solid var(--page-border);
}
.page-news__card-body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.page-news__card-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 2px 10px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
  border-radius: 2px;
}
.tag-guide {
  color: var(--page-bg);
  background: var(--page-neon);
}
.tag-data {
  color: var(--page-bg);
  background: var(--page-blue);
}
.page-news__card-title {
  margin: 0 0 8px;
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.05em;
  color: var(--page-text);
}
.page-news__card-text {
  margin: 0 0 14px;
  font-size: 0.82rem;
  color: var(--page-text-secondary);
  flex: 1;
  line-height: 1.5;
}
.page-news__card-link {
  align-self: flex-start;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--page-blue);
  text-decoration: none;
  transition: color 0.2s;
  letter-spacing: 0.04em;
}
.page-news__card-link:hover,
.page-news__card-link:focus {
  color: var(--page-neon);
}

/* ===== 苹果端更新日志 ===== */
.page-news__ios-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--page-surface);
  border: 1px solid var(--page-border);
}
.page-news__ios-icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  object-fit: contain;
  border-radius: 4px;
}
.page-news__ios-desc {
  margin: 0;
  font-size: 0.9rem;
  color: var(--page-text-secondary);
  line-height: 1.5;
}
.page-news__changelog {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-news__changelog-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  background: var(--page-card-bg);
  border-left: 4px solid var(--page-blue);
  border: 1px solid var(--page-border);
  border-left-width: 4px;
  transition: border-left-color 0.25s;
}
.page-news__changelog-item:hover {
  border-left-color: var(--page-neon);
}
.page-news__changelog-version {
  font-family: var(--page-font-heading);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--page-gold);
  white-space: nowrap;
}
.page-news__changelog-text {
  font-size: 0.82rem;
  color: var(--page-text-secondary);
}

/* ===== 社区观察 ===== */
.page-news__community-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--page-card-bg);
  border: 1px solid var(--page-border);
  box-shadow: inset 0 0 0 1px var(--page-border);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.page-news__community-card:hover,
.page-news__community-card:focus-within {
  border-color: var(--page-gold);
  box-shadow: inset 0 0 0 1px var(--page-gold), 0 0 16px rgba(255,215,0,0.2);
}
.page-news__community-img {
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  display: block;
}
.page-news__community-body {
  flex: 1;
}
.page-news__community-title {
  margin: 0 0 8px;
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--page-text);
}
.page-news__community-text {
  margin: 0 0 12px;
  font-size: 0.85rem;
  color: var(--page-text-secondary);
  line-height: 1.6;
}
.page-news__community-link {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--page-gold);
  text-decoration: none;
  transition: color 0.2s;
  letter-spacing: 0.04em;
}
.page-news__community-link:hover,
.page-news__community-link:focus {
  color: var(--page-neon);
}

/* ===== 窄屏适配 (移动端优先) ===== */
@media (max-width: 767px) {
  .page-news {
    padding: 12px;
  }
  .page-news__hero {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
  }
  .page-news__hero-icon {
    width: 60px;
    height: 60px;
  }
  .page-news__title {
    font-size: 1.3rem;
  }
  .page-news__subtitle {
    font-size: 0.8rem;
  }
  .page-news__filters {
    gap: 8px;
    margin-bottom: 20px;
  }
  .page-news__filter-btn {
    padding: 5px 14px;
    font-size: 0.75rem;
  }
  .page-news__sidebar {
    display: none;
  }
  .page-news__card-grid {
    grid-template-columns: 1fr;
  }
  .page-news__ios-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .page-news__ios-icon {
    width: 50px;
    height: 50px;
  }
  .page-news__changelog-item {
    flex-direction: column;
    gap: 4px;
  }
  .page-news__community-card {
    padding: 12px;
  }
}

/* ===== 桌面端适配 ===== */
@media (min-width: 768px) {
  .page-news {
    padding: 24px 32px;
    max-width: 1280px;
    margin: 0 auto;
  }
  .page-news__hero {
    padding: 28px 24px;
  }
  .page-news__hero-icon {
    width: 100px;
    height: 100px;
  }
  .page-news__title {
    font-size: 2rem;
  }
  .page-news__subtitle {
    font-size: 1rem;
  }
  .page-news__layout {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-news__sidebar {
    display: block;
    width: var(--page-sidebar-width);
    position: sticky;
    top: 24px;
  }
  .page-news__content {
    flex: 1;
    min-width: 0;
  }
  .page-news__card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-news__community-card {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-news__community-img {
    width: 280px;
    height: auto;
    aspect-ratio: 2 / 1;
    flex-shrink: 0;
  }
  .page-news__ios-icon {
    width: 70px;
    height: 70px;
  }
}

@media (min-width: 1024px) {
  .page-news {
    padding: 32px 48px;
  }
  .page-news__card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-news__sidebar {
    width: 220px;
  }
  .page-news__community-img {
    width: 320px;
  }
}

@media (min-width: 1200px) {
  .page-news__card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===== 减少运动偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-news__card,
  .page-news__filter-btn,
  .page-news__sidebar-link,
  .page-news__changelog-item,
  .page-news__community-card {
    transition: none !important;
    transform: none !important;
  }
}