.page-news {
  --news-ink: #E8EEF9;
  --news-muted: #5A6A85;
  --news-card-bg: #F5F7FA;
  --news-dark-bg: #0B1B3D;
  --news-accent: #00D4FF;
  --news-cta: #FF6B1A;
  --news-status: #C6FF00;
  --news-border: #D0D5DD;
  --news-radius: 0.375rem;
  font-family: var(--font-body);
  background-color: #F5F7FA;
  color: var(--color-ink);
  overflow-x: hidden;
}

/* ===== 首屏 ===== */
.page-news__hero {
  position: relative;
  background-color: var(--news-dark-bg);
  color: var(--news-ink);
  padding: 6.5rem 0 2.5rem;
  overflow: hidden;
}

.page-news__hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.06) 1px, transparent 1px);
  background-size: 2.5rem 2.5rem;
  pointer-events: none;
}

.page-news__hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2rem;
}

.page-news__hero-copy {
  max-width: 52rem;
}

.page-news__hero-kicker {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--news-status);
  margin: 0 0 1.25rem;
}

.page-news__hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin: 0 0 1.25rem;
  color: #FFFFFF;
}

.page-news__hero-desc {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--news-ink);
  opacity: 0.85;
  max-width: 46rem;
  margin: 0;
}

.page-news__hero-meta {
  display: grid;
  gap: 1.25rem;
  align-content: end;
}

.page-news__hero-note {
  font-size: 0.9375rem;
  color: var(--news-ink);
  opacity: 0.7;
  margin: 0;
  line-height: 1.6;
}

.page-news__hero-frame {
  width: 100%;
  max-width: 100%;
  border-radius: var(--news-radius);
  overflow: hidden;
  border: 1px solid rgba(0, 212, 255, 0.25);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

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

/* ===== 面包屑 ===== */
.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: rgba(232, 238, 249, 0.6);
  margin-bottom: 1.5rem;
}

.page-news .breadcrumb a {
  color: rgba(232, 238, 249, 0.85);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-news .breadcrumb a:hover {
  color: var(--news-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ===== 文章列表区块 ===== */
.page-news__listing {
  padding: 2.5rem 0 4rem;
  background-color: #F5F7FA;
}

.page-news__listing-grid {
  display: grid;
  gap: 2.5rem;
}

/* 分类索引 */
.page-news__index {
  align-self: start;
  background-color: #FFFFFF;
  border: 1px solid var(--news-border);
  border-radius: var(--news-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.page-news__index-label {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--news-dark-bg);
  margin: 0 0 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--news-dark-bg);
}

.page-news__index-list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  gap: 0.375rem;
}

.page-news__filter {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.625rem 0.75rem;
  background: transparent;
  border: 0;
  border-left: 3px solid transparent;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--news-muted);
  cursor: pointer;
  text-align: left;
  border-radius: 0 var(--news-radius) var(--news-radius) 0;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-news__filter:hover {
  color: var(--news-dark-bg);
  background-color: rgba(0, 212, 255, 0.06);
}

.page-news__filter.is-active {
  color: var(--news-dark-bg);
  border-left-color: var(--news-cta);
  background-color: rgba(255, 107, 26, 0.06);
}

.page-news__filter-count {
  font-size: 0.8125rem;
  background-color: rgba(11, 27, 61, 0.06);
  padding: 0.1875rem 0.5rem;
  border-radius: 999px;
  color: var(--news-muted);
  font-weight: 700;
}

.page-news__filter.is-active .page-news__filter-count {
  background-color: var(--news-cta);
  color: #FFFFFF;
}

.page-news__index-note {
  margin-top: 0.5rem;
}

.page-news__index .entry-link {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.9375rem;
}

/* 文章列表主内容 */
.page-news__main {
  display: grid;
  gap: 1.5rem;
}

.page-news__section-head {
  margin-bottom: 0.25rem;
}

.page-news__section-title {
  margin: 0.125rem 0 0;
}

/* 文章卡片 */
.page-news__article {
  display: grid;
  gap: 1rem;
  background-color: #FFFFFF;
  border: 1px solid var(--news-border);
  border-radius: var(--news-radius);
  overflow: hidden;
  transition: box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
  box-shadow: var(--shadow-sm);
}

.page-news__article:hover {
  border-color: var(--news-accent);
  box-shadow: var(--shadow-md);
}

.page-news__article-media {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: 0;
  min-height: 12rem;
}

.page-news__article-img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 12rem;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.page-news__article:hover .page-news__article-img {
  transform: scale(1.03);
}

.page-news__article-tag {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  background-color: var(--news-cta);
  color: #FFFFFF;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3125rem 0.625rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.page-news__article--match .page-news__article-tag {
  background-color: var(--news-status);
  color: var(--news-dark-bg);
}

.page-news__article--feature .page-news__article-tag {
  background-color: var(--news-accent);
  color: var(--news-dark-bg);
}

.page-news__article--update .page-news__article-tag {
  background-color: var(--news-secondary);
  color: #FFFFFF;
}

.page-news__article-body {
  padding: 0 1.5rem 1.5rem;
  display: grid;
  align-content: start;
  gap: 0.75rem;
}

.page-news__article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.8125rem;
}

.page-news__publish-label {
  color: var(--news-muted);
  font-weight: 600;
}

.page-news__article-title {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  line-height: 1.25;
  text-transform: uppercase;
  color: var(--news-dark-bg);
  margin: 0;
}

.page-news__article-excerpt {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--news-muted);
  margin: 0;
}

.page-news__article-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--news-border);
  padding-top: 0.875rem;
  margin-top: 0.25rem;
}

.page-news__article-readtime {
  font-size: 0.8125rem;
  color: var(--news-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.3125rem;
}

.page-news__article-foot .entry-link {
  font-size: 0.9375rem;
  font-weight: 600;
}

/* 更多按钮 */
.page-news__more {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.75rem;
  background-color: var(--news-dark-bg);
  border-radius: var(--news-radius);
  background-image: linear-gradient(rgba(0, 212, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.08) 1px, transparent 1px);
  background-size: 2rem 2rem;
  color: var(--news-ink);
}

.page-news__more-text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
  color: rgba(232, 238, 249, 0.85);
}

/* ===== 专题系列 ===== */
.page-news__series {
  padding: 4rem 0;
  background-color: var(--news-dark-bg);
  color: var(--news-ink);
}

.page-news__series-title {
  color: #FFFFFF;
}

.page-news__series-desc {
  color: rgba(232, 238, 249, 0.7);
}

.page-news__series-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.page-news__series-card {
  position: relative;
  display: grid;
  gap: 0.75rem;
  background-color: rgba(11, 27, 61, 0.6);
  border: 1px solid rgba(0, 212, 255, 0.28);
  border-radius: var(--news-radius);
  padding: 1.75rem 1.5rem;
  text-decoration: none;
  color: var(--news-ink);
  transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.25s ease;
  overflow: hidden;
}

.page-news__series-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 5.5rem;
  height: 5.5rem;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.16) 0%, transparent 70%);
  pointer-events: none;
}

.page-news__series-card:hover {
  border-color: var(--news-status);
  background-color: rgba(11, 27, 61, 0.9);
  transform: translateY(-2px);
}

.page-news__series-num {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  line-height: 1;
  color: var(--news-accent);
  opacity: 0.75;
}

.page-news__series-name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  text-transform: uppercase;
  color: #FFFFFF;
  margin: 0;
}

.page-news__series-intro {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: rgba(232, 238, 249, 0.68);
  margin: 0;
}

.page-news__series-arrow {
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
  font-size: 1.4rem;
  color: var(--news-status);
  transition: transform 0.25s ease;
}

.page-news__series-card:hover .page-news__series-arrow {
  transform: translateX(4px);
}

/* ===== 更新日志 ===== */
.page-news__changelog {
  padding: 4rem 0;
  background-color: #F5F7FA;
}

.page-news__changelog-grid {
  display: grid;
  gap: 2.5rem;
}

.page-news__changelog-head {
  align-self: start;
}

.page-news__changelog-title {
  margin-top: 0.125rem;
  color: var(--news-dark-bg);
}

.page-news__changelog-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--news-muted);
  margin: 1rem 0 1.25rem;
}

.page-news__changelog-head .entry-link {
  font-size: 1rem;
  font-weight: 600;
}

/* 时间线 */
.page-news__timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  position: relative;
}

.page-news__timeline::before {
  content: "";
  position: absolute;
  top: 0.875rem;
  bottom: 0.875rem;
  left: 0.625rem;
  width: 2px;
  background: linear-gradient(180deg, var(--news-accent), var(--news-secondary), var(--news-status));
  opacity: 0.5;
}

.page-news__timeline-item {
  position: relative;
  padding-left: 2.75rem;
}

.page-news__timeline-detail {
  background-color: #FFFFFF;
  border: 1px solid var(--news-border);
  border-radius: var(--news-radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-news__timeline-detail:hover {
  border-color: var(--news-accent);
  box-shadow: var(--shadow-md);
}

.page-news__timeline-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
}

.page-news__timeline-summary::-webkit-details-marker {
  display: none;
}

.page-news__timeline-summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--news-accent);
  margin-left: auto;
  transition: transform 0.2s ease;
}

.page-news__timeline-detail[open] .page-news__timeline-summary::after {
  content: "–";
}

.page-news__timeline-dot {
  position: absolute;
  top: 1.125rem;
  left: -2.125rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background-color: var(--news-accent);
  border: 2px solid #F5F7FA;
  box-shadow: 0 0 0 2px var(--news-accent);
}

.page-news__timeline-item:nth-child(2) .page-news__timeline-dot {
  background-color: var(--news-secondary);
  box-shadow: 0 0 0 2px var(--news-secondary);
}

.page-news__timeline-item:nth-child(3) .page-news__timeline-dot {
  background-color: var(--news-status);
  box-shadow: 0 0 0 2px var(--news-status);
}

.page-news__timeline-version {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--news-dark-bg);
  background-color: rgba(0, 212, 255, 0.08);
  padding: 0.25rem 0.5rem;
  border-radius: var(--news-radius);
}

.page-news__timeline-label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--news-dark-bg);
}

.page-news__timeline-status {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
}

.page-news__timeline-content {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--news-muted);
  display: grid;
  gap: 0.875rem;
  border-top: 1px dashed var(--news-border);
  margin-top: 0.125rem;
}

.page-news__timeline-content p {
  margin: 0.75rem 0 0;
}

.page-news__timeline-content .entry-link {
  font-size: 0.9375rem;
  font-weight: 600;
}

/* ===== 文章详情锚点区 ===== */
.page-news__details {
  padding: 2.5rem 0 4rem;
  background-color: #FFFFFF;
}

.page-news__details .container {
  display: grid;
  gap: 1.5rem;
}

.page-news__detail-card {
  border: 1px solid var(--news-border);
  border-left: 4px solid var(--news-accent);
  border-radius: var(--news-radius);
  background-color: #F5F7FA;
  padding: 1.5rem;
  scroll-margin-top: 6rem;
}

.page-news__detail-card:nth-child(2) {
  border-left-color: var(--news-cta);
}

.page-news__detail-card:nth-child(3) {
  border-left-color: var(--news-secondary);
}

.page-news__detail-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  text-transform: uppercase;
  color: var(--news-dark-bg);
  margin: 0 0 0.625rem;
}

.page-news__detail-card p:not(.page-news__detail-note) {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--news-muted);
  margin: 0 0 0.625rem;
}

.page-news__detail-note {
  font-size: 0.875rem;
  color: var(--news-muted);
  margin: 0.75rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.page-news__detail-note .entry-link {
  font-size: 0.875rem;
  font-weight: 600;
}

/* ===== 移动端优先 ===== */
@media (min-width: 768px) {
  .page-news__hero {
    padding: 7.5rem 0 3.5rem;
  }

  .page-news__hero-inner {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: end;
    gap: 3rem;
  }

  .page-news__article {
    grid-template-columns: 16rem 1fr;
    min-height: 14rem;
  }

  .page-news__article-media,
  .page-news__article-img {
    min-height: 100%;
    height: 100%;
  }

  .page-news__article-body {
    padding: 1.25rem 1.75rem 1.5rem 0.25rem;
  }

  .page-news__more {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

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

  .page-news__changelog-grid {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 3rem;
  }

  .page-news__details .container {
    grid-template-columns: repeat(2, 1fr);
    align-items: stretch;
  }

  .page-news__detail-card:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1080px) {
  .page-news__listing-grid {
    grid-template-columns: 16.5rem 1fr;
    gap: 3rem;
  }

  .page-news__series-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-news__details .container {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-news__detail-card:first-child {
    grid-column: auto;
  }
}

.page-news {
  --news-secondary: none;
}