/* ===== 品牌日志页面专属样式 ===== */
.page-news {
  --clr-timeline-line: var(--clr-primary-300, #64B5F6);
  --clr-card-border: var(--clr-primary-700, #1A3A6B);
  --clr-marker-bg: var(--clr-primary-900, #0A192F);
  --clr-detail-bg: var(--clr-neutral-100, #F5F7FA);
  --clr-filter-active: var(--clr-accent, #FFD700);
  --clr-filter-bg: rgba(255, 215, 0, 0.12);
  --insight-gradient-start: #0A192F;
  --insight-gradient-end: #1A3A6B;

  display: block;
  width: 100%;
  padding: 1.5rem 0 3rem;
  background: var(--clr-neutral-100, #F5F7FA);
}

/* 面包屑 */
.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  font-size: 0.85rem;
  color: var(--clr-primary-700, #1A3A6B);
  margin-bottom: 1.2rem;
  padding: 0.3rem 0;
}

.page-news .breadcrumb a {
  color: var(--clr-primary-500, #2196F3);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.page-news .breadcrumb a:hover {
  color: var(--clr-accent, #FFD700);
  text-decoration: underline;
}

.page-news .breadcrumb__sep {
  color: var(--clr-primary-300, #64B5F6);
  font-weight: 700;
  user-select: none;
}

.page-news .breadcrumb [aria-current="page"] {
  color: var(--clr-primary-900, #0A192F);
  font-weight: 600;
}

/* 页头 */
.page-news__header {
  margin-bottom: 2rem;
  border-bottom: 3px solid var(--clr-accent, #FFD700);
  padding-bottom: 1rem;
}

.page-news__title {
  font-size: var(--fs-heading-lg, 3rem);
  font-weight: var(--fw-heading, 800);
  color: var(--clr-primary-900, #0A192F);
  line-height: 1.15;
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
}

.page-news__subtitle {
  font-size: 1.1rem;
  color: var(--clr-primary-700, #1A3A6B);
  margin: 0 0 1rem;
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* 过滤栏 */
.page-news__filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.page-news__filter-bar .tag {
  background: transparent;
  border: 1.5px solid var(--clr-primary-500, #2196F3);
  color: var(--clr-primary-700, #1A3A6B);
  padding: 0.35rem 1rem;
  border-radius: 0;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  font-family: var(--ff-primary, Inter, sans-serif);
}

.page-news__filter-bar .tag:hover {
  background: var(--clr-filter-bg);
  border-color: var(--clr-accent, #FFD700);
}

.page-news__filter-bar .tag--active {
  background: var(--clr-filter-active, #FFD700);
  border-color: var(--clr-filter-active, #FFD700);
  color: var(--clr-primary-900, #0A192F);
  box-shadow: 0 2px 0 rgba(0,0,0,0.1);
}

/* 双栏布局 */
.page-news__layout {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* 时间轴 */
.page-news__timeline {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: relative;
  padding-left: 0;
}

/* 时间轴竖线 - 纯CSS实现 */
.page-news__timeline::before {
  content: '';
  position: absolute;
  left: 1.45rem;
  top: 0.8rem;
  bottom: 0.8rem;
  width: 2.5px;
  background: var(--clr-timeline-line);
  border-radius: 2px;
  opacity: 0.45;
}

/* 卡片 */
.page-news__card {
  display: flex;
  gap: 1rem;
  background: #fff;
  border: 1px solid var(--clr-card-border);
  box-shadow: var(--shadow-card, 0 2px 0 rgba(255,215,0,0.3));
  padding: 1.25rem 1.25rem 1.25rem 1rem;
  transition: box-shadow 0.3s, transform 0.25s;
  position: relative;
  border-left: 4px solid var(--clr-accent, #FFD700);
}

.page-news__card:hover {
  box-shadow: 0 4px 0 rgba(255, 215, 0, 0.5), 0 8px 24px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

/* 左侧标记区 */
.page-news__card-marker {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  width: 2.8rem;
  min-width: 2.8rem;
  position: relative;
  z-index: 2;
}

.page-news__card-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--clr-primary-500, #2196F3);
  background: var(--clr-marker-bg);
  display: block;
}

.page-news__card-date {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--clr-primary-700, #1A3A6B);
  text-align: center;
  line-height: 1.2;
  letter-spacing: 0.02em;
  background: var(--clr-neutral-100, #F5F7FA);
  padding: 0.1rem 0.3rem;
  border: 1px solid var(--clr-primary-300, #64B5F6);
}

/* 卡片主体 */
.page-news__card-body {
  flex: 1;
  min-width: 0;
}

.page-news__card-body .tag {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--clr-accent, #FFD700);
  color: var(--clr-primary-700, #1A3A6B);
  padding: 0.15rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}

.page-news__card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-primary-900, #0A192F);
  margin: 0 0 0.35rem;
  line-height: 1.3;
}

.page-news__card-summary {
  font-size: 0.95rem;
  color: var(--clr-neutral-900, #1A1A2E);
  margin: 0 0 0.6rem;
  line-height: 1.55;
}

.page-news__card-detail {
  background: var(--clr-detail-bg);
  padding: 0.8rem 1rem;
  margin: 0.6rem 0 0.8rem;
  border-left: 3px solid var(--clr-primary-500, #2196F3);
  font-size: 0.92rem;
  color: var(--clr-primary-900, #0A192F);
  line-height: 1.55;
}

.page-news__card-detail p {
  margin: 0 0 0.5rem;
}

.page-news__card-detail a {
  color: var(--clr-primary-500, #2196F3);
  text-decoration: underline;
  font-weight: 500;
}

.page-news__card-detail a:hover {
  color: var(--clr-accent, #FFD700);
}

.page-news__detail-img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  margin-top: 0.5rem;
  border: 1px solid var(--clr-primary-300, #64B5F6);
}

/* 阅读全文按钮 */
.page-news__toggle {
  font-size: 0.82rem;
  padding: 0.3rem 1rem;
  background: transparent;
  border: 1.5px solid var(--clr-primary-500, #2196F3);
  color: var(--clr-primary-700, #1A3A6B);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  font-family: var(--ff-primary, Inter, sans-serif);
}

.page-news__toggle:hover {
  background: var(--clr-primary-500, #2196F3);
  color: #fff;
  border-color: var(--clr-primary-500, #2196F3);
}

.page-news__toggle[aria-expanded="true"] {
  background: var(--clr-accent, #FFD700);
  border-color: var(--clr-accent, #FFD700);
  color: var(--clr-primary-900, #0A192F);
}

/* 侧边栏 */
.page-news__sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-news__section {
  background: #fff;
  border: 1px solid var(--clr-primary-700, #1A3A6B);
  box-shadow: var(--shadow-card);
  padding: 1.25rem;
}

.page-news__section-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--clr-primary-900, #0A192F);
  margin: 0 0 0.75rem;
  border-bottom: 2px solid var(--clr-accent, #FFD700);
  padding-bottom: 0.4rem;
}

.page-news__insight-visual {
  margin-bottom: 0.75rem;
}

.page-news__insight-img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--clr-primary-300, #64B5F6);
  display: block;
}

.page-news__insight-text {
  font-size: 0.95rem;
  color: var(--clr-neutral-900, #1A1A2E);
  line-height: 1.6;
  margin: 0 0 0.8rem;
}

.page-news__insight-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.page-news__insight-list li {
  font-size: 0.9rem;
  color: var(--clr-primary-700, #1A3A6B);
  padding-left: 1.2rem;
  position: relative;
  font-weight: 500;
}

.page-news__insight-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--clr-accent, #FFD700);
  font-weight: 700;
}

/* 相关链接 */
.page-news__related-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-news__related-list .btn--sm {
  font-size: 0.82rem;
  padding: 0.3rem 0.9rem;
  border-width: 1.5px;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
}

/* 移动端优先 — 窄屏调整 */
@media (max-width: 640px) {
  .page-news {
    padding: 1rem 0 2rem;
  }

  .page-news__title {
    font-size: 1.8rem;
  }

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

  .page-news__filter-bar {
    gap: 0.4rem;
  }

  .page-news__filter-bar .tag {
    font-size: 0.78rem;
    padding: 0.25rem 0.7rem;
  }

  .page-news__timeline::before {
    left: 1.15rem;
  }

  .page-news__card {
    flex-direction: column;
    padding: 0.9rem 0.9rem 0.9rem 0.9rem;
    border-left-width: 3px;
  }

  .page-news__card-marker {
    flex-direction: row;
    width: auto;
    min-width: auto;
    gap: 0.5rem;
    margin-bottom: 0.3rem;
    align-items: center;
  }

  .page-news__card-icon {
    width: 32px;
    height: 32px;
  }

  .page-news__card-date {
    font-size: 0.7rem;
    padding: 0.05rem 0.4rem;
  }

  .page-news__card-title {
    font-size: 1rem;
  }

  .page-news__card-summary {
    font-size: 0.88rem;
  }

  .page-news__card-detail {
    padding: 0.6rem 0.8rem;
    font-size: 0.85rem;
  }

  .page-news__toggle {
    font-size: 0.78rem;
    padding: 0.25rem 0.8rem;
  }

  .page-news__section {
    padding: 1rem;
  }

  .page-news__insight-img {
    max-height: 180px;
    object-fit: cover;
  }

  .page-news__section--links {
    margin-top: 0.5rem;
  }

  .page-news__related-list {
    flex-direction: column;
    gap: 0.4rem;
  }

  .page-news__related-list .btn--sm {
    text-align: center;
    width: 100%;
  }
}

/* 桌面双栏 */
@media (min-width: 768px) {
  .page-news__layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-news__timeline {
    flex: 2;
    min-width: 0;
  }

  .page-news__sidebar {
    flex: 1;
    min-width: 260px;
    max-width: 360px;
    position: sticky;
    top: 6rem;
  }

  .page-news__card {
    padding: 1.5rem 1.5rem 1.5rem 1.25rem;
  }

  .page-news__card-marker {
    width: 3.2rem;
    min-width: 3.2rem;
  }

  .page-news__card-icon {
    width: 44px;
    height: 44px;
  }

  .page-news__card-title {
    font-size: 1.25rem;
  }

  .page-news__card-detail {
    padding: 1rem 1.25rem;
  }

  .page-news__insight-list li {
    font-size: 0.92rem;
  }
}

/* 大屏优化 */
@media (min-width: 1024px) {
  .page-news__timeline {
    padding-right: 1rem;
  }

  .page-news__card {
    padding: 1.75rem 1.75rem 1.75rem 1.5rem;
  }

  .page-news__card-title {
    font-size: 1.35rem;
  }
}