/* ===== 品牌日志页面专属样式 ===== */
.page-news {
  --timeline-rail-width: 32px;
  --timeline-dot-size: 14px;
  --timeline-line-width: 3px;
  --log-card-radius: var(--radius-md);
  --log-gap: var(--spacing-2xl);
  --sidebar-width: 260px;

  display: block;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--header-height) + 1.5rem) var(--spacing-lg) var(--spacing-2xl);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  position: relative;
}

/* 页面头部 */
.page-news .page-header {
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-border);
}

.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.page-news .breadcrumb-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-news .breadcrumb-link:hover {
  color: var(--color-accent);
}

.page-news .breadcrumb-sep {
  color: var(--color-primary);
  font-weight: 300;
}

.page-news .breadcrumb-current {
  color: var(--color-text-primary);
  font-weight: 500;
}

.page-news .page-title {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 300;
  letter-spacing: -0.02em;
  margin: 0 0 var(--spacing-sm);
  color: var(--color-text-primary);
  line-height: 1.1;
  position: relative;
}

.page-news .page-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-primary);
  margin-top: var(--spacing-sm);
  border-radius: var(--radius-pill);
}

.page-news .page-desc {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0;
  line-height: 1.6;
}

/* 时间轴布局 */
.page-news .timeline-wrap {
  display: flex;
  gap: var(--spacing-lg);
  position: relative;
}

/* 时间轴导轨（左侧） */
.page-news .timeline-rail {
  display: none;
  flex-shrink: 0;
  width: var(--timeline-rail-width);
  position: relative;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.page-news .timeline-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: var(--timeline-line-width);
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent), transparent);
  transform: translateX(-50%);
  border-radius: var(--radius-pill);
}

.page-news .timeline-dot {
  width: var(--timeline-dot-size);
  height: var(--timeline-dot-size);
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-primary);
  flex-shrink: 0;
  z-index: 2;
  position: relative;
}

.page-news .timeline-dot:nth-child(1) { margin-top: 2rem; }
.page-news .timeline-dot:nth-child(2) { margin-top: 16rem; }
.page-news .timeline-dot:nth-child(3) { margin-top: 16rem; }
.page-news .timeline-dot:nth-child(4) { margin-top: 14rem; }

/* 日志条目列表 */
.page-news .timeline-items {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--log-gap);
}

/* 单条日志卡片 */
.page-news .log-card {
  display: flex;
  gap: var(--spacing-md);
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

/* 时间标记（移动端内联） */
.page-news .log-marker {
  display: none;
  flex-shrink: 0;
  width: 48px;
  text-align: center;
  padding-top: 0.25rem;
}

.page-news .log-marker-label {
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  writing-mode: vertical-lr;
  text-orientation: mixed;
  background: var(--color-surface);
  padding: var(--spacing-xs) 0.35rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
}

/* 日志内容主体 */
.page-news .log-body {
  flex: 1;
  min-width: 0;
  background: var(--color-surface);
  border-radius: var(--log-card-radius);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.page-news .log-body:hover {
  border-color: rgba(229,57,53,0.3);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

/* 日志图片 */
.page-news .log-figure {
  margin: 0;
  line-height: 0;
  background: var(--color-bg);
}

.page-news .log-img {
  width: 100%;
  height: auto;
  max-height: 260px;
  object-fit: cover;
  object-position: center;
  display: block;
  border-bottom: 1px solid var(--color-border);
}

/* details/summary 折叠区域 */
.page-news .log-details {
  display: block;
}

.page-news .log-summary {
  display: block;
  cursor: pointer;
  padding: var(--spacing-lg);
  list-style: none;
  user-select: none;
  transition: background var(--transition-fast);
}

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

.page-news .log-summary:hover {
  background: rgba(255,255,255,0.02);
}

.page-news .log-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.page-news .log-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin: 0;
  line-height: 1.25;
}

.page-news .log-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.page-news .tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.8rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  letter-spacing: 0.02em;
}

.page-news .tag-primary {
  background: rgba(229,57,53,0.15);
  color: var(--color-primary);
  border: 1px solid rgba(229,57,53,0.25);
}

.page-news .tag-primary:hover {
  background: var(--color-primary);
  color: #fff;
}

.page-news .log-excerpt {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin: var(--spacing-sm) 0 0;
  line-height: 1.5;
}

.page-news .log-toggle {
  display: inline-block;
  margin-top: var(--spacing-sm);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-accent);
  border-bottom: 1px dashed var(--color-accent);
  transition: opacity var(--transition-fast);
}

.page-news .log-toggle:hover {
  opacity: 0.75;
}

/* 展开详情 */
.page-news .log-detail {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  animation: logFadeIn 0.25s ease;
}

@keyframes logFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-news .log-para {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin: var(--spacing-md) 0 0;
  line-height: 1.7;
  max-width: 640px;
}

.page-news .log-para:first-child {
  margin-top: var(--spacing-md);
}

/* FAQ 索引列表 */
.page-news .faq-index-list {
  list-style: none;
  padding: 0;
  margin: var(--spacing-md) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.page-news .faq-index-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.page-news .faq-index-link::before {
  content: '›';
  font-size: 1.2rem;
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1;
}

.page-news .faq-index-link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.page-news .log-inline-link {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.page-news .log-inline-link:hover {
  border-bottom-color: var(--color-accent);
}

.page-news .mt-lg {
  margin-top: var(--spacing-lg);
}

/* 侧边栏（桌面） */
.page-news .log-sidebar {
  display: none;
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
  align-self: flex-start;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.page-news .sidebar-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: var(--spacing-lg);
}

.page-news .sidebar-heading {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin: 0 0 var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

.page-news .sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.page-news .sidebar-link {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  display: block;
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  border-left: 2px solid transparent;
  padding-left: var(--spacing-sm);
}

.page-news .sidebar-link:hover {
  color: var(--color-accent);
  border-left-color: var(--color-primary);
  padding-left: var(--spacing-md);
}

/* :target 高亮效果 */
.page-news .log-card:target .log-body {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(255,193,7,0.25), 0 4px 20px rgba(0,0,0,0.3);
}

.page-news .log-card:target .log-title {
  color: var(--color-accent);
}

/* 响应式 ── 桌面端 */
@media (min-width: 900px) {
  .page-news {
    padding: calc(var(--header-height) + 2.5rem) var(--spacing-xl) var(--spacing-2xl);
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    grid-template-rows: auto 1fr;
    grid-template-areas:
      "header header"
      "main   sidebar";
    gap: 0 var(--spacing-xl);
  }

  .page-news .page-header {
    grid-area: header;
    margin-bottom: var(--spacing-2xl);
  }

  .page-news .timeline-wrap {
    grid-area: main;
  }

  .page-news .log-sidebar {
    grid-area: sidebar;
    display: flex;
  }

  .page-news .page-title {
    font-size: 3.5rem;
  }

  .page-news .timeline-rail {
    display: flex;
  }

  .page-news .log-marker {
    display: none;
  }

  .page-news .log-img {
    max-height: 300px;
  }

  .page-news .log-title {
    font-size: 1.55rem;
  }

  .page-news .log-detail {
    padding: 0 var(--spacing-xl) var(--spacing-lg);
  }

  .page-news .log-summary {
    padding: var(--spacing-lg) var(--spacing-xl);
  }
}

/* 响应式 ── 中屏及以上（时间轴标记显示） */
@media (min-width: 640px) and (max-width: 899px) {
  .page-news .log-marker {
    display: block;
  }

  .page-news .timeline-rail {
    display: none;
  }

  .page-news .page-title {
    font-size: 2.25rem;
  }
}

/* 响应式 ── 窄屏 */
@media (max-width: 639px) {
  .page-news {
    padding: calc(var(--header-height) + 1rem) var(--spacing-md) var(--spacing-xl);
  }

  .page-news .page-title {
    font-size: 1.85rem;
  }

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

  .page-news .log-marker {
    display: none;
  }

  .page-news .timeline-rail {
    display: none;
  }

  .page-news .log-summary {
    padding: var(--spacing-md);
  }

  .page-news .log-detail {
    padding: 0 var(--spacing-md) var(--spacing-md);
  }

  .page-news .log-title {
    font-size: 1.15rem;
  }

  .page-news .log-excerpt {
    font-size: 0.85rem;
  }

  .page-news .log-para {
    font-size: 0.88rem;
  }

  .page-news .log-img {
    max-height: 180px;
  }

  .page-news .log-card:target .log-body {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(255,193,7,0.2);
  }

  .page-news .faq-index-link {
    font-size: 0.85rem;
  }

  .page-news .sidebar-card {
    display: none;
  }
}

/* 确保图片响应式 */
.page-news img {
  max-width: 100%;
  height: auto;
}

/* 细节：卡片间隔自适应 */
.page-news .timeline-items:only-child {
  width: 100%;
}