.page-news {
  --color-deep-space: #0B1E36;
  --color-deep-space-end: #1A3A5C;
  --color-neon-purple: #9B59B6;
  --color-vibrant-orange: #E67E22;
  --color-cool-gray: #2C3E50;
  --color-light-gray: #BDC3C7;
  --color-white: #FFFFFF;
  --color-transparent-overlay: rgba(255,255,255,0.1);
  --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-data: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --max-width: 1200px;
  --space-unit: 1rem;

  display: block;
  width: 100%;
  background: var(--color-deep-space);
  color: var(--color-white);
  font-family: var(--font-primary);
  line-height: 1.6;
  padding-top: calc(var(--space-unit) * 3);
  padding-bottom: calc(var(--space-unit) * 5);
}

/* container复用，但避免污染全局，限定于作用域内 */
.page-news .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
  width: 100%;
  box-sizing: border-box;
}

/* 面包屑 */
.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-light-gray);
  margin-bottom: 1rem;
}

.page-news .breadcrumb a {
  color: var(--color-neon-purple);
  text-decoration: none;
  transition: opacity 0.2s;
}

.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  opacity: 0.75;
}

.page-news .breadcrumb__sep {
  color: var(--color-light-gray);
  font-weight: 700;
}

.page-news .breadcrumb__current {
  color: var(--color-white);
  font-weight: 500;
}

/* 页面头部 */
.page-news__header {
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-transparent-overlay);
  margin-bottom: 2.5rem;
}

.page-news__title {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 2.5rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0 0 0.5rem;
  line-height: 1.2;
}

.page-news__subtitle {
  font-size: 1.125rem;
  color: var(--color-light-gray);
  margin: 0;
  max-width: 640px;
}

/* 通用区域头部 */
.page-news__section {
  margin-bottom: 4rem;
}

.page-news__section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.page-news__section-header .section-title {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0;
  line-height: 1.3;
}

.page-news__section-desc {
  font-size: 0.95rem;
  color: var(--color-light-gray);
  margin: 0.5rem 0 0;
  flex-basis: 100%;
}

/* ========== 筛选栏 ========== */
.page-news__filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-news__filter-btn {
  font-family: var(--font-primary);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-transparent-overlay);
  border-radius: 999px;
  background: transparent;
  color: var(--color-light-gray);
  cursor: pointer;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}

.page-news__filter-btn:hover,
.page-news__filter-btn:focus-visible {
  background: var(--color-transparent-overlay);
  color: var(--color-white);
}

.page-news__filter-btn.is-active {
  background: var(--color-neon-purple);
  border-color: var(--color-neon-purple);
  color: var(--color-white);
}

/* ========== 时间轴 ========== */
.page-news__timeline {
  position: relative;
  padding-left: 2rem;
}

.page-news__timeline-line {
  position: absolute;
  left: 0.5rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-neon-purple), var(--color-vibrant-orange));
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-news__timeline-line svg {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

.page-news__timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.page-news__timeline-item:last-child {
  padding-bottom: 0;
}

.page-news__tl-marker {
  position: absolute;
  left: -2rem;
  top: 0.4rem;
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.page-news__tl-marker svg {
  width: 16px;
  height: 16px;
}

.page-news__tl-body {
  background: var(--color-transparent-overlay);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(255,255,255,0.05);
  transition: background 0.25s, border-color 0.25s;
}

.page-news__tl-body:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(155,89,182,0.25);
}

.page-news__tl-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.page-news__tl-date {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-light-gray);
  text-transform: uppercase;
}

.page-news__tl-tag {
  font-family: var(--font-primary);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: var(--color-transparent-overlay);
  color: var(--color-white);
}

.tag-feature { background: rgba(155,89,182,0.3); color: #c39bd3; }
.tag-guide { background: rgba(230,126,34,0.25); color: #f0b27a; }
.tag-data { background: rgba(46,204,113,0.25); color: #82e0aa; }
.tag-announcement { background: rgba(52,152,219,0.25); color: #85c1e9; }

.page-news__tl-heading {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-white);
  margin: 0 0 0.4rem;
  line-height: 1.3;
}

.page-news__tl-summary {
  font-size: 0.95rem;
  color: var(--color-light-gray);
  margin: 0 0 0.75rem;
}

.page-news__tl-details {
  margin-top: 0.25rem;
}

.page-news__tl-summary-btn {
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-neon-purple);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0;
  border: none;
  background: none;
  list-style: none;
}

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

.page-news__tl-summary-btn::before {
  content: '▸';
  display: inline-block;
  transition: transform 0.25s;
  font-size: 0.9rem;
}

details[open] .page-news__tl-summary-btn::before {
  transform: rotate(90deg);
}

.page-news__tl-detail-content {
  padding-top: 1rem;
  border-top: 1px solid var(--color-transparent-overlay);
  margin-top: 0.75rem;
  color: var(--color-light-gray);
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-news__tl-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-top: 1rem;
  object-fit: cover;
  display: block;
}

/* ========== 赛事数据解读 卡片网格 ========== */
.page-news__cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.page-news__card {
  background: var(--color-transparent-overlay);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.page-news__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(11,30,54,0.6);
}

.page-news__card-img-wrap {
  width: 100%;
  overflow: hidden;
  aspect-ratio: 800 / 500;
  background: var(--color-deep-space-end);
}

.page-news__card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s;
}

.page-news__card:hover .page-news__card-img {
  transform: scale(1.04);
}

.page-news__card-body {
  padding: 1.5rem;
}

.page-news__card-tag {
  display: inline-block;
  font-family: var(--font-primary);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: rgba(46,204,113,0.25);
  color: #82e0aa;
  margin-bottom: 0.75rem;
}

.page-news__card-title {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-white);
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.page-news__card-text {
  font-size: 0.9rem;
  color: var(--color-light-gray);
  margin: 0 0 1rem;
  line-height: 1.6;
}

.page-news__card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-vibrant-orange);
  text-decoration: none;
  transition: gap 0.25s, color 0.25s;
}

.page-news__card-link:hover,
.page-news__card-link:focus-visible {
  gap: 0.6rem;
  color: var(--color-neon-purple);
}

/* ========== 使用技巧 ========== */
.page-news__tips-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-news__tip-card {
  display: flex;
  gap: 1.25rem;
  background: var(--color-transparent-overlay);
  border-radius: 14px;
  padding: 1.5rem;
  border: 1px solid rgba(255,255,255,0.05);
  transition: background 0.25s, border-color 0.25s;
}

.page-news__tip-card:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(155,89,182,0.2);
}

.page-news__tip-num {
  font-family: var(--font-data);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-neon-purple);
  line-height: 1;
  flex-shrink: 0;
  min-width: 2.2rem;
  letter-spacing: 0.02em;
}

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

.page-news__tip-title {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-white);
  margin: 0 0 0.4rem;
  line-height: 1.3;
}

.page-news__tip-text {
  font-size: 0.9rem;
  color: var(--color-light-gray);
  margin: 0 0 0.75rem;
  line-height: 1.6;
}

.page-news__tip-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
  margin-top: 0.5rem;
  display: block;
}

/* ========== 品牌公告 ========== */
.page-news__section-header--announce {
  margin-bottom: 1.75rem;
}

.page-news__announce-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-news__announce-item {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  background: var(--color-transparent-overlay);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(255,255,255,0.05);
  align-items: flex-start;
}

.page-news__announce-tag {
  flex-shrink: 0;
  font-family: var(--font-primary);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: rgba(52,152,219,0.25);
  color: #85c1e9;
}

.page-news__announce-body {
  flex: 1;
  min-width: 200px;
}

.page-news__announce-title {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-white);
  margin: 0 0 0.35rem;
  line-height: 1.3;
}

.page-news__announce-text {
  font-size: 0.875rem;
  color: var(--color-light-gray);
  margin: 0;
  line-height: 1.6;
}

.page-news__announce-cta {
  margin-top: 2rem;
  text-align: center;
}

.page-news__cta-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-vibrant-orange);
  text-decoration: none;
  padding: 0.6rem 1.8rem;
  border: 1px solid var(--color-vibrant-orange);
  border-radius: 999px;
  transition: background 0.25s, color 0.25s, gap 0.25s;
}

.page-news__cta-link:hover,
.page-news__cta-link:focus-visible {
  background: var(--color-vibrant-orange);
  color: var(--color-white);
  gap: 0.7rem;
}

/* ========== 响应式 ========== */
@media (min-width: 640px) {
  .page-news__title {
    font-size: 3rem;
  }

  .page-news__cards-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-news__tips-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-news__announce-list {
    grid-template-columns: 1fr 1fr;
  }

  .page-news__tl-body {
    padding: 1.5rem 2rem;
  }
}

@media (min-width: 960px) {
  .page-news {
    padding-top: calc(var(--space-unit) * 4);
  }

  .page-news__title {
    font-size: 3.5rem;
  }

  .page-news__timeline {
    padding-left: 3rem;
  }

  .page-news__tl-marker {
    left: -3rem;
  }

  .page-news__cards-grid {
    gap: 2rem;
  }

  .page-news__tips-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-news__announce-list {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-news__tip-card {
    flex-direction: column;
    padding: 1.75rem;
  }

  .page-news__tip-num {
    font-size: 1.75rem;
  }
}

/* 大屏微调 */
@media (min-width: 1200px) {
  .page-news__header {
    padding-bottom: 3rem;
    margin-bottom: 3rem;
  }

  .page-news__section {
    margin-bottom: 5rem;
  }
}

/* 移动端窄屏优化 */
@media (max-width: 480px) {
  .page-news .container {
    padding: 0 0.875rem;
  }

  .page-news__title {
    font-size: 1.75rem;
  }

  .page-news__subtitle {
    font-size: 0.95rem;
  }

  .page-news__filter-btn {
    font-size: 0.75rem;
    padding: 0.3rem 0.75rem;
  }

  .page-news__timeline {
    padding-left: 1.5rem;
  }

  .page-news__tl-marker {
    left: -1.5rem;
  }

  .page-news__tl-body {
    padding: 1rem 1.25rem;
  }

  .page-news__tl-heading {
    font-size: 1.05rem;
  }

  .page-news__card-body {
    padding: 1.25rem;
  }

  .page-news__tip-card {
    flex-direction: column;
    padding: 1.25rem;
  }

  .page-news__tip-num {
    font-size: 1.25rem;
  }

  .page-news__announce-item {
    padding: 1rem 1.25rem;
  }
}