/* ===== 页面专属：文章中心 (page-news) ===== */
.page-news {
  --news-sidebar-w: 160px;
  --news-gap: 1.5rem;
  --timeline-line-w: 2px;
  --dot-size: 14px;
  --card-radius: 8px;
  display: block;
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  padding: 1rem 1rem 2.5rem;
  color: var(--clr-text-light, #FFFFFF);
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  background: transparent;
}

/* ---- 面包屑 ---- */
.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  font-size: 0.8125rem;
  color: var(--clr-text-muted, #B0BEC5);
  margin-bottom: 1.25rem;
  padding: 0.25rem 0;
}
.page-news .breadcrumb a {
  color: var(--clr-primary, #00A88E);
  text-decoration: none;
  transition: color var(--transition, 0.25s ease);
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  color: var(--clr-accent, #FF6B35);
  text-decoration: underline;
}
.page-news .breadcrumb .sep {
  color: var(--clr-metal, #C0C0C0);
  font-weight: 300;
  user-select: none;
}

/* ---- 页面标题 ---- */
.page-news__header {
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 2px solid rgba(0, 168, 142, 0.25);
  position: relative;
}
.page-news__header::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 80px;
  height: 2px;
  background: var(--clr-primary, #00A88E);
  box-shadow: var(--glow, 0 0 12px rgba(0,168,142,0.3));
}
.page-news__title {
  font-family: var(--font-heading, 'Montserrat Black', sans-serif);
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  line-height: 1.15;
  margin: 0 0 0.4rem;
  letter-spacing: -0.01em;
  color: var(--clr-text-light, #FFFFFF);
  text-shadow: 0 0 20px rgba(0, 168, 142, 0.25);
}
.page-news__desc {
  font-size: 1rem;
  color: var(--clr-text-muted, #B0BEC5);
  max-width: 580px;
  margin: 0;
  line-height: 1.6;
}

/* ---- 布局容器 ---- */
.page-news__layout {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--news-gap);
}

/* ---- 隐藏 radio ---- */
.page-news__radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* ---- 侧边栏 / 分类标签 ---- */
.page-news__sidebar {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--clr-primary, #00A88E) transparent;
  padding: 0.25rem 0 0.75rem;
  position: sticky;
  top: calc(var(--header-h, 56px) + 0.5rem);
  z-index: 5;
  background: var(--clr-bg-dark, #0B1A2A);
}
.page-news__sidebar::-webkit-scrollbar {
  height: 4px;
}
.page-news__sidebar::-webkit-scrollbar-thumb {
  background: var(--clr-primary, #00A88E);
  border-radius: 4px;
}

.page-news__filter-label {
  flex: 0 0 auto;
  padding: 0.5rem 1.2rem;
  font-family: var(--font-heading, 'Montserrat Black', sans-serif);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  color: var(--clr-text-muted, #B0BEC5);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(192, 192, 192, 0.2);
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--transition, 0.25s ease);
  user-select: none;
  white-space: nowrap;
}
.page-news__filter-label:hover {
  border-color: var(--clr-primary, #00A88E);
  color: var(--clr-text-light, #FFFFFF);
  background: rgba(0, 168, 142, 0.08);
}

/* radio 选中状态 */
#page-news-filter-all:checked ~ .page-news__sidebar label[for="page-news-filter-all"],
#page-news-filter-updates:checked ~ .page-news__sidebar label[for="page-news-filter-updates"],
#page-news-filter-guides:checked ~ .page-news__sidebar label[for="page-news-filter-guides"],
#page-news-filter-industry:checked ~ .page-news__sidebar label[for="page-news-filter-industry"] {
  color: var(--clr-text-light, #FFFFFF);
  background: var(--clr-primary, #00A88E);
  border-color: var(--clr-primary, #00A88E);
  box-shadow: 0 0 16px rgba(0, 168, 142, 0.35);
}

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

/* ---- 筛选逻辑 ---- */
.page-news__section {
  display: block;
  margin-bottom: 2.5rem;
}
/* 默认全部显示，当选中非 all 时隐藏不匹配的 section */
#page-news-filter-updates:checked ~ .page-news__main .page-news__section:not([data-category="updates"]),
#page-news-filter-guides:checked ~ .page-news__main .page-news__section:not([data-category="guides"]),
#page-news-filter-industry:checked ~ .page-news__main .page-news__section:not([data-category="industry"]) {
  display: none;
}

/* ---- 章节标题 ---- */
.page-news__section-title {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-family: var(--font-heading, 'Montserrat Black', sans-serif);
  font-size: clamp(1.35rem, 3.5vw, 1.85rem);
  margin: 0 0 1rem;
  color: var(--clr-text-light, #FFFFFF);
  letter-spacing: -0.01em;
}
.page-news__title-accent {
  font-size: 0.7em;
  color: var(--clr-primary, #00A88E);
  opacity: 0.7;
  font-weight: 700;
}

/* ---- 章节主图 ---- */
.page-news__section-figure {
  margin: 0 0 1.25rem;
  border-radius: var(--card-radius, 8px);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(192, 192, 192, 0.12);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  max-width: 100%;
  display: inline-block;
}
.page-news__section-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 400 / 250;
}

/* ---- 时间线 ---- */
.page-news__timeline {
  position: relative;
  padding-left: calc(var(--dot-size) + 12px);
}
.page-news__timeline::before {
  content: '';
  position: absolute;
  top: 8px;
  left: calc(var(--dot-size) / 2);
  width: var(--timeline-line-w);
  bottom: 0;
  background: linear-gradient(to bottom, var(--clr-primary, #00A88E), rgba(192, 192, 192, 0.25));
  border-radius: 2px;
  transform: translateX(-50%);
}

.page-news__timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
}
.page-news__timeline-item:last-child {
  margin-bottom: 0;
}

.page-news__dot {
  position: absolute;
  left: calc(-1 * (var(--dot-size) + 12px) + var(--dot-size) / 2);
  top: 1.25rem;
  width: var(--dot-size);
  height: var(--dot-size);
  border-radius: 50%;
  background: var(--clr-primary, #00A88E);
  border: 3px solid var(--clr-bg-dark, #0B1A2A);
  box-shadow: 0 0 0 2px var(--clr-primary, #00A88E), 0 0 12px rgba(0, 168, 142, 0.3);
  z-index: 2;
  transform: translateX(-50%);
}

/* ---- 文章卡片 ---- */
.page-news__card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(192, 192, 192, 0.1);
  border-radius: var(--card-radius, 8px);
  padding: 0.875rem;
  transition: all var(--transition, 0.25s ease);
  position: relative;
}
.page-news__card:hover {
  border-color: var(--clr-primary, #00A88E);
  background: rgba(0, 168, 142, 0.06);
  box-shadow: 0 4px 24px rgba(0, 168, 142, 0.15);
  transform: translateY(-2px);
}

.page-news__card-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 200 / 150;
  object-fit: cover;
  border-radius: calc(var(--card-radius, 8px) - 2px);
  background: var(--clr-bg-medium, #112B3F);
  flex-shrink: 0;
}

.page-news__card-body {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.page-news__card-title {
  font-family: var(--font-heading, 'Montserrat Black', sans-serif);
  font-size: 1.05rem;
  margin: 0;
  color: var(--clr-text-light, #FFFFFF);
  line-height: 1.3;
}

.page-news__card-summary {
  font-size: 0.875rem;
  color: var(--clr-text-muted, #B0BEC5);
  margin: 0;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.page-news__card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-top: 0.25rem;
}
.page-news__card-meta .tag-label {
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(0, 168, 142, 0.12);
  border: 1px solid rgba(0, 168, 142, 0.25);
  color: var(--clr-primary, #00A88E);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-family: var(--font-heading, 'Montserrat Black', sans-serif);
}
.page-news__card-link {
  font-size: 0.8125rem;
  color: var(--clr-accent, #FF6B35);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition, 0.25s ease);
  margin-left: auto;
}
.page-news__card-link:hover,
.page-news__card-link:focus-visible {
  color: var(--clr-accent-light, #FF8C5A);
  text-decoration: underline;
}

/* ---- 悬停展开信息 ---- */
.page-news__card-extra {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.3rem;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.35s ease, opacity 0.35s ease, margin 0.3s ease;
}
.page-news__card:hover .page-news__card-extra,
.page-news__card:focus-within .page-news__card-extra {
  max-height: 60px;
  opacity: 1;
  margin-top: 0.5rem;
}
.page-news__card-extra .stat-badge {
  font-size: 0.65rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: rgba(255, 107, 53, 0.1);
  border: 1px solid rgba(255, 107, 53, 0.2);
  color: var(--clr-accent-light, #FF8C5A);
  font-family: var(--font-heading, 'Montserrat Black', sans-serif);
  letter-spacing: 0.02em;
}

/* ---- 桌面端 (min-width: 768px) ---- */
@media (min-width: 768px) {
  .page-news {
    padding: 1.5rem 2rem 3rem;
  }

  .page-news__header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
  }
  .page-news__title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }
  .page-news__desc {
    font-size: 1.05rem;
  }

  .page-news__layout {
    flex-direction: row;
    gap: 2rem;
  }

  .page-news__sidebar {
    flex-direction: column;
    gap: 0.65rem;
    width: var(--news-sidebar-w);
    flex-shrink: 0;
    overflow-x: visible;
    padding: 0.5rem 0 1rem;
    position: sticky;
    top: calc(var(--header-h, 56px) + 1rem);
    align-self: flex-start;
    background: transparent;
    border-right: 1px solid rgba(192, 192, 192, 0.1);
    padding-right: 1rem;
  }
  .page-news__filter-label {
    width: 100%;
    text-align: center;
    font-size: 0.9rem;
    padding: 0.55rem 0.8rem;
    white-space: normal;
    border-radius: var(--radius, 6px);
  }

  .page-news__main {
    flex: 1;
    min-width: 0;
  }

  .page-news__section {
    margin-bottom: 3rem;
  }
  .page-news__section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: 1.25rem;
  }

  .page-news__timeline {
    padding-left: calc(var(--dot-size) + 20px);
  }

  .page-news__card {
    flex-direction: row;
    align-items: flex-start;
    padding: 1rem 1.25rem;
  }
  .page-news__card-img {
    width: 180px;
    aspect-ratio: 200 / 150;
    flex-shrink: 0;
  }
  .page-news__card-body {
    padding-top: 0.1rem;
  }
  .page-news__card-title {
    font-size: 1.1rem;
  }
  .page-news__card-summary {
    -webkit-line-clamp: 3;
  }
}

/* ---- 大桌面端 (min-width: 1024px) ---- */
@media (min-width: 1024px) {
  .page-news {
    padding: 2rem 2.5rem 4rem;
  }
  .page-news__sidebar {
    width: 180px;
    gap: 0.75rem;
    padding-right: 1.5rem;
  }
  .page-news__filter-label {
    font-size: 0.95rem;
    padding: 0.65rem 1rem;
  }
  .page-news__card-img {
    width: 200px;
  }
  .page-news__card {
    padding: 1.25rem 1.5rem;
  }
  .page-news__section-figure {
    max-width: 440px;
  }
}