/* ===== 内容专栏页面专属 ===== */
.page-news {
  background: var(--silver-white);
  color: var(--night-blue);
}

.page-news .page-head {
  padding: 48px 0 32px;
  border-top: 1px solid var(--ice-blue);
}
.page-news .page-head h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 4.25rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--lake-blue);
  margin: 12px 0 16px;
  max-width: 12em;
}
.page-news .page-head .section-lead {
  color: var(--lake-blue);
  opacity: 0.85;
  max-width: 42em;
}

/* 编辑精选 */
.page-news .featured {
  padding: 0 0 48px;
}
.page-news .featured__grid {
  display: grid;
  gap: 0;
}
.page-news .featured__media {
  margin: 0;
  overflow: hidden;
  background: var(--snow-gray);
}
.page-news .featured__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-news .featured__content {
  background: var(--lake-blue);
  color: var(--silver-white);
  padding: 28px 24px;
  position: relative;
}
.page-news .featured__content .print-label {
  color: var(--heat-orange);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.page-news .featured__content h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  line-height: 1.2;
  margin: 8px 0 14px;
  max-width: 14em;
}
.page-news .featured__content p {
  color: var(--ice-blue);
  font-size: 0.9375rem;
  margin-bottom: 20px;
}
.page-news .featured__content .btn {
  margin-right: 8px;
  margin-bottom: 8px;
}
.page-news .featured__content .btn-ghost {
  border-color: var(--silver-white);
  color: var(--silver-white);
}
.page-news .featured__content .btn-ghost:hover {
  background: var(--silver-white);
  color: var(--night-blue);
}

/* 最新文章 */
.page-news .latest {
  padding: 40px 0 56px;
  border-top: 1px solid var(--snow-gray);
}
.page-news .latest .section-head {
  margin-bottom: 20px;
}
.page-news .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.page-news .filter-tag {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--lake-blue);
  border-radius: 999px;
  color: var(--lake-blue);
  font-size: 0.8125rem;
  line-height: 1.4;
  text-decoration: none;
  transition: background 200ms var(--ease), color 200ms var(--ease), border-color 200ms var(--ease);
}
.page-news .filter-tag:hover,
.page-news .filter-tag:focus {
  background: var(--lake-blue);
  color: var(--silver-white);
  border-color: var(--lake-blue);
}
.page-news .filter-anchor {
  display: block;
  width: 1px;
  height: 1px;
  overflow: hidden;
  margin-bottom: -1px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.page-news .news-feed {
  column-count: 1;
  column-gap: 24px;
}
.page-news .news-item {
  break-inside: avoid;
  display: block;
  margin: 0 0 24px;
  padding: 24px;
  background: var(--cloud-white);
  position: relative;
  overflow: hidden;
  transition: transform 240ms var(--ease), box-shadow 240ms var(--ease);
}
.page-news .news-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-header);
}
.page-news .news-item__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.page-news .news-item__cat {
  color: var(--heat-orange);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.page-news .news-item__time {
  color: var(--ice-blue);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}
.page-news .news-item__title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  line-height: 1.3;
  color: var(--lake-blue);
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}
.page-news .news-item__summary {
  color: var(--night-blue);
  font-size: 0.9375rem;
  line-height: 1.65;
  opacity: 0.82;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  position: relative;
  z-index: 1;
}
.page-news .news-item:hover .news-item__summary {
  -webkit-line-clamp: 5;
}
.page-news .news-item__index {
  position: absolute;
  top: 12px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 2.5rem;
  line-height: 1;
  font-weight: 700;
  color: var(--snow-gray);
  z-index: 0;
}

/* :target 筛选 */
.page-news #filter-login:target ~ .news-feed .news-item[data-cat="login"],
.page-news #filter-data:target ~ .news-feed .news-item[data-cat="data"],
.page-news #filter-announce:target ~ .news-feed .news-item[data-cat="announce"],
.page-news #filter-faq:target ~ .news-feed .news-item[data-cat="faq"] {
  display: block;
}
.page-news #filter-login:target ~ .news-feed .news-item:not([data-cat="login"]),
.page-news #filter-data:target ~ .news-feed .news-item:not([data-cat="data"]),
.page-news #filter-announce:target ~ .news-feed .news-item:not([data-cat="announce"]),
.page-news #filter-faq:target ~ .news-feed .news-item:not([data-cat="faq"]) {
  display: none;
}
.page-news #news-all:target ~ .news-feed .news-item {
  display: block;
}

/* 专题系列 */
.page-news .series {
  padding: 56px 0;
  background: var(--lake-blue);
  color: var(--silver-white);
}
.page-news .series .section-kicker {
  color: var(--heat-orange);
}
.page-news .series .section-title,
.page-news .series .section-head h2 {
  color: var(--silver-white);
}
.page-news .series .section-lead {
  color: var(--ice-blue);
}
.page-news .series-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 32px;
}
.page-news .series-card {
  display: block;
  padding: 28px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(184, 205, 224, 0.3);
  border-top-width: 4px;
  text-decoration: none;
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}
.page-news .series-card--track { border-top-color: var(--signal-yellow); }
.page-news .series-card--data { border-top-color: var(--heat-orange); }
.page-news .series-card--guide { border-top-color: var(--status-green); }
.page-news .series-card:hover,
.page-news .series-card:focus {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--heat-orange);
}
.page-news .series-card__tag {
  font-family: var(--font-mono);
  color: var(--heat-orange);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.page-news .series-card h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--silver-white);
  margin: 10px 0 8px;
}
.page-news .series-card p {
  color: var(--ice-blue);
  font-size: 0.9375rem;
  margin-bottom: 16px;
}
.page-news .series-card__count {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--silver-white);
  padding-bottom: 2px;
  border-bottom: 2px solid var(--heat-orange);
}
.page-news .series-media-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 28px;
}
.page-news .series-media,
.page-news .categories-media {
  margin: 0;
  overflow: hidden;
  background: var(--night-blue);
}
.page-news .series-media img,
.page-news .categories-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-news .series-media__caption,
.page-news .categories-media__caption {
  padding: 12px 16px;
  font-size: 0.875rem;
  background: var(--snow-gray);
  color: var(--lake-blue);
}

/* 栏目分类 */
.page-news .categories {
  padding: 56px 0;
  border-top: 1px solid var(--snow-gray);
}
.page-news .categories-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 32px;
  margin-bottom: 28px;
}
.page-news .category-block {
  padding: 24px;
  background: var(--cloud-white);
  border-left: 4px solid var(--ice-blue);
  transition: border-color 200ms var(--ease);
}
.page-news .category-block:hover {
  border-left-color: var(--heat-orange);
}
.page-news .category-block h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--lake-blue);
  margin-bottom: 6px;
}
.page-news .category-block p {
  color: var(--night-blue);
  font-size: 0.9375rem;
  opacity: 0.85;
  margin-bottom: 8px;
}
.page-news .category-block ul {
  margin: 0 0 12px;
  padding-left: 1.2em;
  color: var(--night-blue);
  font-size: 0.9375rem;
}
.page-news .category-block a {
  color: var(--heat-orange);
  font-weight: 700;
  text-decoration: none;
  font-size: 0.9375rem;
}

/* 订阅提示 */
.page-news .subscribe-note {
  padding: 48px 0 64px;
  background: var(--night-blue);
  color: var(--silver-white);
}
.page-news .subscribe-note__inner {
  display: grid;
  gap: 24px;
}
.page-news .subscribe-note .section-kicker {
  color: var(--heat-orange);
}
.page-news .subscribe-note .section-title,
.page-news .subscribe-note h2 {
  color: var(--silver-white);
}
.page-news .subscribe-note p {
  color: var(--ice-blue);
}
.page-news .subscribe-note__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.page-news .subscribe-note .btn-ghost {
  border-color: var(--ice-blue);
  color: var(--silver-white);
}
.page-news .subscribe-note .btn-ghost:hover {
  background: var(--ice-blue);
  color: var(--night-blue);
}

/* 桌面增强 */
@media (min-width: 768px) {
  .page-news .featured__grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: end;
  }
  .page-news .featured__content {
    padding: 40px;
    margin-left: -48px;
    margin-bottom: 24px;
  }
  .page-news .featured__content h2 {
    font-size: 2.5rem;
  }

  .page-news .news-feed {
    column-count: 2;
  }
  .page-news .news-item {
    padding: 28px;
  }

  .page-news .series-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .page-news .series-media-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .page-news .categories-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .page-news .subscribe-note__inner {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-news .page-head {
    padding: 64px 0 48px;
  }
  .page-news .featured {
    padding-bottom: 64px;
  }
  .page-news .latest {
    padding: 56px 0 72px;
  }
  .page-news .series,
  .page-news .categories {
    padding: 72px 0;
  }
}