/* ===== 页面专用：最新动态 (page-news) ===== */
.page-news {
  --news-timeline-color: var(--color-accent);
  --news-timeline-dot-size: 18px;
  --news-timeline-line-width: 3px;
  --news-card-radius: 12px;
  --news-card-border: 1px solid var(--color-accent);
  --news-card-bg: var(--color-primary);
  --news-card-glow: 0 0 20px var(--color-accent-glow);
  --news-number-size: 2.8rem;
  --news-transition: 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ---------- 面包屑 ---------- */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0 0.5rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.page-news .breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--news-transition);
}

.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  color: var(--color-secondary);
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.page-news .breadcrumb-sep {
  color: var(--color-text-secondary);
  user-select: none;
}

/* ---------- 页面标题 ---------- */
.page-news .page-header {
  margin: 1.5rem 0 2.5rem;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 1.25rem;
}

.page-news .page-header h1 {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0 0 0.5rem;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--color-accent) 0%, #f5e6a3 60%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-news .page-desc {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin: 0;
  font-weight: 400;
}

/* ---------- 时间轴容器 ---------- */
.page-news .timeline {
  position: relative;
  padding: 0 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* 时间轴竖线 */
.page-news .timeline::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 12px;
  bottom: 60px;
  width: var(--news-timeline-line-width);
  background: linear-gradient(180deg, var(--news-timeline-color) 0%, rgba(212, 175, 55, 0.15) 100%);
  border-radius: 2px;
  z-index: 0;
}

/* ---------- 时间轴项目 ---------- */
.page-news .timeline-item {
  position: relative;
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  z-index: 1;
}

.page-news .timeline-item:last-child {
  margin-bottom: 0;
}

/* ---------- 时间轴标记 ---------- */
.page-news .timeline-marker {
  flex: 0 0 40px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 6px;
  cursor: default;
}

.page-news .timeline-dot {
  display: block;
  width: var(--news-timeline-dot-size);
  height: var(--news-timeline-dot-size);
  border-radius: 50%;
  background: var(--news-timeline-color);
  box-shadow: 0 0 14px var(--color-accent-glow), 0 0 4px var(--color-accent);
  transition: transform var(--news-transition), box-shadow var(--news-transition);
  z-index: 2;
  position: relative;
}

.page-news .timeline-marker:hover .timeline-dot,
.page-news .timeline-marker:focus-within .timeline-dot {
  transform: scale(1.35);
  box-shadow: 0 0 24px var(--color-accent-glow), 0 0 8px var(--color-accent), 0 0 48px var(--color-green-glow);
}

/* 悬停提示 */
.page-news .timeline-hover-tip {
  position: absolute;
  left: 50%;
  top: calc(var(--news-timeline-dot-size) + 10px);
  transform: translateX(-50%);
  background: var(--color-bg-dark);
  color: var(--color-accent);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-family: var(--font-body);
  white-space: nowrap;
  border: 1px solid var(--color-accent);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--news-transition), transform var(--news-transition);
  z-index: 10;
}

.page-news .timeline-marker:hover .timeline-hover-tip,
.page-news .timeline-marker:focus-within .timeline-hover-tip {
  opacity: 1;
  transform: translateX(-50%) translateY(4px);
}

/* ---------- 时间轴内容卡片 ---------- */
.page-news .timeline-content {
  flex: 1;
  min-width: 0;
}

/* ---------- details / summary 卡片 ---------- */
.page-news .card-details {
  display: block;
  background: var(--news-card-bg);
  border: var(--news-card-border);
  border-radius: var(--news-card-radius);
  padding: 0;
  transition: box-shadow var(--news-transition), border-color var(--news-transition);
  overflow: hidden;
}

.page-news .card-details[open] {
  box-shadow: var(--news-card-glow);
  border-color: var(--color-accent);
}

.page-news .card-details:hover {
  box-shadow: var(--news-card-glow);
  border-color: var(--color-accent);
}

/* summary 重置与样式 */
.page-news .card-summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--news-transition);
  border-radius: var(--news-card-radius);
  position: relative;
}

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

.page-news .card-summary:hover,
.page-news .card-details[open] .card-summary {
  background: rgba(212, 175, 55, 0.06);
}

/* 编号 */
.page-news .card-number {
  font-family: var(--font-heading);
  font-size: var(--news-number-size);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  flex-shrink: 0;
  opacity: 0.85;
  letter-spacing: 0.02em;
}

/* 标题 */
.page-news .card-summary-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-text-primary);
  flex: 1;
  letter-spacing: 0.01em;
}

/* 展开图标 */
.page-news .card-summary-icon {
  display: inline-block;
  width: 20px;
  height: 20px;
  position: relative;
  flex-shrink: 0;
  transition: transform var(--news-transition);
}

.page-news .card-summary-icon::before,
.page-news .card-summary-icon::after {
  content: '';
  position: absolute;
  background: var(--color-accent);
  border-radius: 2px;
  transition: transform var(--news-transition);
}

.page-news .card-summary-icon::before {
  width: 2px;
  height: 100%;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
}

.page-news .card-summary-icon::after {
  width: 100%;
  height: 2px;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.page-news .card-details[open] .card-summary-icon {
  transform: rotate(45deg);
}

/* ---------- 卡片主体 ---------- */
.page-news .card-body {
  padding: 0 1.5rem 1.5rem;
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-news .card-body p {
  margin: 0 0 1rem;
}

.page-news .card-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 卡片图片 ---------- */
.page-news .card-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 8px;
  margin-bottom: 1.25rem;
  object-fit: cover;
  border: 1px solid rgba(212, 175, 55, 0.15);
  background: var(--color-surface-1);
}

.page-news .card-img-icon {
  display: block;
  width: 120px;
  height: auto;
  max-width: 100%;
  border-radius: 8px;
  object-fit: contain;
  background: var(--color-surface-1);
  margin-bottom: 1rem;
}

/* ---------- 详细内容 ---------- */
.page-news .card-detail {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
}

.page-news .card-detail p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* ---------- 04 索引区 ---------- */
.page-news .index-intro {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.page-news .index-intro p {
  margin: 0;
  padding-top: 0.25rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

/* ---------- 文章列表 ---------- */
.page-news .article-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-news .article-item {
  background: var(--color-surface-1);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--color-accent);
  transition: background var(--news-transition), border-color var(--news-transition);
}

.page-news .article-item:hover {
  background: var(--color-surface-2);
  border-left-color: var(--color-secondary);
}

.page-news .article-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 0.35rem;
}

.page-news .article-summary {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  margin: 0 0 0.5rem;
  line-height: 1.55;
}

.page-news .article-link {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--news-transition);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.page-news .article-link::after {
  content: '→';
  transition: transform var(--news-transition);
}

.page-news .article-link:hover,
.page-news .article-link:focus-visible {
  color: var(--color-secondary);
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.page-news .article-link:hover::after {
  transform: translateX(4px);
}

/* ===== 响应式：窄屏 (默认移动端优先) ===== */
@media (max-width: 599px) {
  .page-news .page-header h1 {
    font-size: 1.8rem;
  }

  .page-news .page-desc {
    font-size: 0.92rem;
  }

  .page-news .timeline::before {
    left: 14px;
    bottom: 40px;
  }

  .page-news .timeline-marker {
    flex: 0 0 32px;
    padding-top: 4px;
  }

  .page-news .timeline-dot {
    width: 14px;
    height: 14px;
  }

  .page-news .timeline-hover-tip {
    display: none;
  }

  .page-news .card-number {
    font-size: 2rem;
  }

  .page-news .card-summary-title {
    font-size: 1.1rem;
  }

  .page-news .card-summary {
    padding: 1rem 1rem 0.75rem;
    flex-wrap: wrap;
  }

  .page-news .card-body {
    padding: 0 1rem 1rem;
    font-size: 0.88rem;
  }

  .page-news .card-img {
    border-radius: 6px;
    margin-bottom: 1rem;
  }

  .page-news .card-img-icon {
    width: 80px;
  }

  .page-news .index-intro {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .page-news .article-item {
    padding: 0.8rem 1rem;
  }

  .page-news .article-title {
    font-size: 0.95rem;
  }

  .page-news .article-summary {
    font-size: 0.82rem;
  }

  .page-news .breadcrumb {
    font-size: 0.78rem;
    padding-top: 0.75rem;
  }
}

/* ===== 响应式：中屏 ===== */
@media (min-width: 600px) and (max-width: 899px) {
  .page-news .page-header h1 {
    font-size: 2.1rem;
  }

  .page-news .card-number {
    font-size: 2.4rem;
  }

  .page-news .card-summary-title {
    font-size: 1.2rem;
  }

  .page-news .card-img-icon {
    width: 100px;
  }

  .page-news .index-intro {
    flex-direction: row;
    align-items: center;
  }
}

/* ===== 响应式：宽屏 ===== */
@media (min-width: 900px) {
  .page-news .page-header {
    margin: 2rem 0 3rem;
    padding-bottom: 1.5rem;
  }

  .page-news .page-header h1 {
    font-size: 2.8rem;
  }

  .page-news .page-desc {
    font-size: 1.1rem;
  }

  .page-news .timeline::before {
    left: 24px;
    bottom: 80px;
  }

  .page-news .timeline-marker {
    flex: 0 0 52px;
    padding-top: 8px;
  }

  .page-news .timeline-dot {
    width: 22px;
    height: 22px;
  }

  .page-news .timeline-item {
    gap: 1.5rem;
    margin-bottom: 2.5rem;
  }

  .page-news .card-summary {
    padding: 1.5rem 2rem;
  }

  .page-news .card-number {
    font-size: 3.2rem;
  }

  .page-news .card-summary-title {
    font-size: 1.5rem;
  }

  .page-news .card-body {
    padding: 0 2rem 2rem;
    font-size: 1rem;
  }

  .page-news .card-img {
    max-width: 85%;
    margin-left: 0;
    margin-right: auto;
  }

  .page-news .card-img-icon {
    width: 140px;
  }

  .page-news .index-intro {
    flex-direction: row;
    align-items: center;
    gap: 1.5rem;
  }

  .page-news .article-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  .page-news .article-item {
    padding: 1.25rem 1.5rem;
  }

  .page-news .breadcrumb {
    font-size: 0.9rem;
    padding-top: 1.25rem;
  }
}

/* ===== 响应式：超大屏 ===== */
@media (min-width: 1200px) {
  .page-news .card-img {
    max-width: 75%;
  }

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

/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-news *,
  .page-news *::before,
  .page-news *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}