/* ===== 页面专属 CSS：.page-news ===== */
.page-news {
  --news-red: #E63946;
  --news-cyan: #00F5D4;
  --news-blue: #00B4D8;
  --news-bg: #0D0D0D;
  --news-card-bg: #1A1A1A;
  --news-text: #E0E0E0;
  --news-text-high: #FFF5E1;
  --news-border: #2A2A2A;
  --news-font-head: 'Impact','Oswald',sans-serif;
  --news-font-body: 'Inter','Roboto',-apple-system,sans-serif;
  --news-font-data: 'JetBrains Mono','Fira Code',monospace;
  --news-radius: 8px;
  --news-shadow: 0 2px 12px rgba(0,0,0,0.7);
  --news-transition: 0.3s ease;
}

/* ---- 基础容器与排版 ---- */
.page-news .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  margin-bottom: 1.2rem;
  font-family: var(--news-font-body);
  font-size: 0.85rem;
  color: var(--news-text);
  opacity: 0.75;
}
.page-news .breadcrumbs a {
  color: var(--news-cyan);
  text-decoration: none;
  transition: color var(--news-transition);
}
.page-news .breadcrumbs a:hover,
.page-news .breadcrumbs a:focus-visible {
  color: var(--news-red);
}
.page-news .breadcrumbs__sep {
  color: var(--news-text);
  opacity: 0.4;
}
.page-news .breadcrumbs [aria-current="page"] {
  color: var(--news-text-high);
  font-weight: 600;
}

/* ---- Hero 区 ---- */
.page-news__hero {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-bottom: 2.8rem;
  padding-bottom: 1.6rem;
  border-bottom: 2px solid var(--news-border);
  position: relative;
}
.page-news__title {
  font-family: var(--news-font-head);
  font-size: clamp(2rem, 6vw, 3.6rem);
  font-style: italic;
  text-transform: uppercase;
  color: var(--news-text-high);
  margin: 0;
  line-height: 1.1;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--news-red), var(--news-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-news__lead {
  font-family: var(--news-font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--news-text);
  max-width: 680px;
  margin: 0;
}
.page-news__hero-img {
  width: 100%;
  max-width: 400px;
  height: auto;
  aspect-ratio: 400 / 250;
  object-fit: cover;
  border-radius: var(--news-radius);
  border: 1px solid var(--news-border);
  box-shadow: var(--news-shadow);
  margin-top: 0.6rem;
}

/* ---- 通用 section 标题 ---- */
.page-news__section-title {
  font-family: var(--news-font-head);
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  color: var(--news-text-high);
  margin: 0 0 1.6rem 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.page-news__section-badge {
  display: inline-block;
  background: var(--news-red);
  color: #fff;
  font-family: var(--news-font-body);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1.4;
}

/* ---- 最新更新列表 ---- */
.page-news__latest {
  margin-bottom: 3.2rem;
}
.page-news__latest-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

/* ---- 更新卡片 ---- */
.page-news__update-card {
  background: var(--news-card-bg);
  border: 1px solid var(--news-border);
  border-radius: var(--news-radius);
  padding: 1.2rem 1.4rem;
  box-shadow: var(--news-shadow);
  transition: border-color var(--news-transition), box-shadow var(--news-transition);
  position: relative;
}
.page-news__update-card:hover {
  border-color: rgba(0,245,212,0.25);
  box-shadow: 0 4px 20px rgba(0,0,0,0.8);
}
.page-news__update-card--featured {
  border-left: 4px solid var(--news-red);
  background: linear-gradient(135deg, #1A1A1A 0%, #111 100%);
}
.page-news__update-card--featured .page-news__update-title {
  font-size: 1.3rem;
  color: var(--news-text-high);
}
.page-news__update-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.page-news__update-type {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--news-font-data);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.6rem;
  border-radius: 4px;
  background: rgba(255,255,255,0.04);
}
.page-news__update-type svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.page-news__update-type--function {
  color: var(--news-cyan);
  border: 1px solid rgba(0,245,212,0.2);
}
.page-news__update-type--data {
  color: var(--news-red);
  border: 1px solid rgba(230,57,70,0.2);
}
.page-news__update-type--interface {
  color: var(--news-blue);
  border: 1px solid rgba(0,180,216,0.2);
}
.page-news__mark-btn {
  background: none;
  border: 1px solid var(--news-border);
  color: var(--news-text);
  font-family: var(--news-font-body);
  font-size: 0.7rem;
  padding: 0.15rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity var(--news-transition), background var(--news-transition);
}
.page-news__mark-btn:hover,
.page-news__mark-btn:focus-visible {
  opacity: 1;
  background: rgba(255,255,255,0.05);
}
.page-news__update-title {
  font-family: var(--news-font-head);
  font-size: 1.1rem;
  color: var(--news-text);
  margin: 0 0 0.4rem 0;
  line-height: 1.3;
}
.page-news__update-desc {
  font-family: var(--news-font-body);
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--news-text);
  margin: 0 0 0.6rem 0;
  opacity: 0.88;
}
.page-news__update-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding-top: 0;
  padding-bottom: 0;
}
.page-news__update-detail p {
  font-family: var(--news-font-body);
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--news-text);
  opacity: 0.8;
  margin: 0.6rem 0;
}
.page-news__update-detail .btn {
  margin-top: 0.4rem;
}
.page-news__expand-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: none;
  border: none;
  color: var(--news-cyan);
  font-family: var(--news-font-data);
  font-size: 0.78rem;
  cursor: pointer;
  padding: 0.2rem 0;
  opacity: 0.7;
  transition: opacity var(--news-transition);
  margin-top: 0.3rem;
}
.page-news__expand-btn:hover,
.page-news__expand-btn:focus-visible {
  opacity: 1;
}
.page-news__expand-icon {
  display: inline-block;
  font-size: 1rem;
  font-weight: 700;
  transition: transform var(--news-transition);
}
.page-news__expand-btn[aria-expanded="true"] .page-news__expand-icon {
  transform: rotate(45deg);
}
.page-news__expand-btn--sm {
  font-size: 0.7rem;
}

/* ---- 时间线 ---- */
.page-news__timeline {
  margin-bottom: 3.2rem;
  position: relative;
}
.page-news__timeline-bg {
  position: absolute;
  top: 3rem;
  right: 0;
  width: 100px;
  height: 50px;
  object-fit: cover;
  opacity: 0.12;
  pointer-events: none;
  border-radius: 4px;
  z-index: 0;
}
.page-news__timeline-track {
  position: relative;
  z-index: 1;
}
.page-news__timeline-line {
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--news-red), var(--news-cyan), var(--news-blue));
  opacity: 0.3;
  border-radius: 2px;
}
.page-news__timeline-items {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  padding-left: 44px;
}
.page-news__tl-item {
  position: relative;
}
.page-news__tl-dot {
  position: absolute;
  left: -32px;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--news-red);
  border: 2px solid var(--news-bg);
  box-shadow: 0 0 0 2px var(--news-red);
  z-index: 2;
}
.page-news__tl-item:nth-child(2) .page-news__tl-dot {
  background: var(--news-cyan);
  box-shadow: 0 0 0 2px var(--news-cyan);
}
.page-news__tl-item:nth-child(3) .page-news__tl-dot {
  background: var(--news-blue);
  box-shadow: 0 0 0 2px var(--news-blue);
}
.page-news__tl-item:nth-child(4) .page-news__tl-dot {
  background: var(--news-cyan);
  box-shadow: 0 0 0 2px var(--news-cyan);
}
.page-news__tl-item:nth-child(5) .page-news__tl-dot {
  background: var(--news-red);
  box-shadow: 0 0 0 2px var(--news-red);
}
.page-news__tl-card {
  background: var(--news-card-bg);
  border: 1px solid var(--news-border);
  border-radius: var(--news-radius);
  padding: 0.9rem 1.2rem;
  box-shadow: var(--news-shadow);
  transition: border-color var(--news-transition);
}
.page-news__tl-card:hover {
  border-color: rgba(0,245,212,0.2);
}
.page-news__tl-card-header {
  margin-bottom: 0.4rem;
}
.page-news__tl-tag {
  display: inline-block;
  font-family: var(--news-font-data);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.1rem 0.5rem;
  border-radius: 3px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--news-border);
}
.page-news__tl-tag--data {
  color: var(--news-red);
  border-color: rgba(230,57,70,0.2);
}
.page-news__tl-tag--function {
  color: var(--news-cyan);
  border-color: rgba(0,245,212,0.2);
}
.page-news__tl-tag--interface {
  color: var(--news-blue);
  border-color: rgba(0,180,216,0.2);
}
.page-news__tl-title {
  font-family: var(--news-font-head);
  font-size: 1rem;
  color: var(--news-text);
  margin: 0 0 0.3rem 0;
  line-height: 1.3;
}
.page-news__tl-desc {
  font-family: var(--news-font-body);
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--news-text);
  opacity: 0.8;
  margin: 0 0 0.4rem 0;
}
.page-news__tl-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding-top: 0;
  padding-bottom: 0;
}
.page-news__tl-detail p {
  font-family: var(--news-font-body);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--news-text);
  opacity: 0.7;
  margin: 0.4rem 0;
}

/* ---- 内容索引 ---- */
.page-news__index {
  margin-bottom: 2.8rem;
}
.page-news__index-lead {
  font-family: var(--news-font-body);
  font-size: 0.95rem;
  color: var(--news-text);
  opacity: 0.8;
  margin: -1rem 0 1.6rem 0;
  max-width: 560px;
}
.page-news__index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.page-news__index-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--news-card-bg);
  border: 1px solid var(--news-border);
  border-radius: var(--news-radius);
  padding: 1.2rem 0.8rem;
  text-decoration: none;
  transition: border-color var(--news-transition), transform var(--news-transition), box-shadow var(--news-transition);
  box-shadow: var(--news-shadow);
}
.page-news__index-item:hover,
.page-news__index-item:focus-visible {
  border-color: var(--news-cyan);
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.8);
}
.page-news__index-icon {
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
}
.page-news__index-icon svg {
  width: 40px;
  height: 40px;
  transition: transform var(--news-transition);
}
.page-news__index-item:hover .page-news__index-icon svg {
  transform: scale(1.1);
}
.page-news__index-label {
  font-family: var(--news-font-head);
  font-size: 0.95rem;
  color: var(--news-text-high);
  margin: 0 0 0.3rem 0;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.page-news__index-desc {
  font-family: var(--news-font-body);
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--news-text);
  opacity: 0.65;
  margin: 0;
  max-width: 140px;
}
.page-news__index-visuals {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.2rem;
}
.page-news__index-img {
  width: 100%;
  max-width: 300px;
  height: auto;
  aspect-ratio: 300 / 200;
  object-fit: cover;
  border-radius: var(--news-radius);
  border: 1px solid var(--news-border);
  box-shadow: var(--news-shadow);
  transition: transform var(--news-transition), border-color var(--news-transition);
}
.page-news__index-img:hover {
  transform: scale(1.01);
  border-color: rgba(0,245,212,0.2);
}

/* ---- 底注 ---- */
.page-news__footer-notes {
  padding-top: 1.2rem;
  border-top: 1px solid var(--news-border);
  margin-top: 1.6rem;
}
.page-news__trust {
  font-family: var(--news-font-body);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--news-text);
  opacity: 0.55;
  max-width: 720px;
  margin: 0;
}

/* ---- 按钮颜色覆写 ---- */
.page-news .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--news-font-body);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 4px;
  background: var(--news-red);
  color: #fff;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background var(--news-transition), transform var(--news-transition);
}
.page-news .btn:hover,
.page-news .btn:focus-visible {
  background: #c62d3a;
  transform: translateY(-1px);
}
.page-news .btn--sm {
  font-size: 0.75rem;
  padding: 0.3rem 0.8rem;
}

/* ---- 展开状态（渐进增强） ---- */
.page-news__update-card[data-expandable][data-expanded] .page-news__update-detail,
.page-news__tl-item[data-expandable][data-expanded] .page-news__tl-detail {
  max-height: 400px;
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
}

/* ---- 移动端优先 + 媒体查询 ---- */
@media (max-width: 640px) {
  .page-news__hero-img {
    max-width: 100%;
  }
  .page-news__timeline-line {
    left: 14px;
  }
  .page-news__timeline-items {
    padding-left: 34px;
    gap: 1.2rem;
  }
  .page-news__tl-dot {
    left: -24px;
    width: 10px;
    height: 10px;
  }
  .page-news__index-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 0.8rem;
  }
  .page-news__index-item {
    padding: 0.9rem 0.5rem;
  }
  .page-news__index-visuals {
    flex-direction: column;
    align-items: center;
  }
  .page-news__index-img {
    max-width: 100%;
  }
  .page-news__update-card {
    padding: 1rem 1rem;
  }
  .page-news__latest-list {
    gap: 1rem;
  }
  .page-news__section-title {
    font-size: 1.3rem;
  }
  .page-news__title {
    font-size: 1.8rem;
  }
}

@media (min-width: 641px) and (max-width: 1024px) {
  .page-news__index-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-news__hero {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-end;
  }
  .page-news__hero-img {
    margin-left: auto;
    margin-top: 0;
  }
}

@media (min-width: 1025px) {
  .page-news__latest-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.4rem;
  }
  .page-news__update-card--featured {
    grid-column: 1 / -1;
  }
  .page-news__hero {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
  .page-news__hero-img {
    margin-left: 2rem;
    flex-shrink: 0;
  }
  .page-news__index-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .page-news__index-visuals {
    justify-content: center;
  }
  .page-news__timeline-items {
    padding-left: 60px;
  }
  .page-news__timeline-line {
    left: 28px;
  }
  .page-news__tl-dot {
    left: -40px;
    width: 14px;
    height: 14px;
  }
  .page-news__tl-card {
    padding: 1rem 1.6rem;
  }
  .page-news__update-card {
    padding: 1.4rem 1.8rem;
  }
}
</main>