/* ===== 品牌更新专属CSS ===== */
.page-news {
  --color-primary: #003366;
  --color-accent: #FF6600;
  --color-bg-warm: #F5F0EB;
  --color-text: #222;
  --color-white: #fff;
  --color-gray: #999;
  --color-primary-light: #E0F0FF;
  --color-accent-light: #FFE6CC;
  --font-heading: Georgia, 'Noto Serif SC', serif;
  --font-body: Helvetica, 'Open Sans', sans-serif;
  --font-data: Consolas, 'Source Code Pro', monospace;
  --timeline-line-color: var(--color-accent);
  --card-shadow: 0 2px 8px rgba(0,0,0,0.08);
  --card-shadow-hover: 0 6px 20px rgba(0,0,0,0.15);
  --radius: 6px;
  --gap: 1.5rem;
}

.page-news__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  background: var(--color-bg-warm);
}

/* 面包屑 */
.page-news__breadcrumb {
  font-size: 0.85rem;
  color: var(--color-gray);
  margin-bottom: 0.5rem;
}
.page-news__breadcrumb-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.page-news__breadcrumb-link:hover {
  color: var(--color-accent);
}
.page-news__breadcrumb-sep {
  margin: 0 0.35rem;
  color: var(--color-gray);
}
.page-news__breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* 页面标题 */
.page-news__page-title {
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 2rem;
  margin: 0 0 0.25rem 0;
  color: var(--color-primary);
  line-height: 1.2;
}
.page-news__page-desc {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 2rem;
  max-width: 35em;
}

/* 日历装饰图 */
.page-news__calendar-img {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 2rem;
}
.page-news__img-frame {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  object-fit: cover;
}

/* 区块公共 */
.page-news__section-heading {
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 1.5rem;
  color: var(--color-primary);
  border-left: 4px solid var(--color-accent);
  padding-left: 0.75rem;
  margin-bottom: 1.5rem;
}

/* ===== 时间线区域 ===== */
.page-news__timeline-section {
  position: relative;
  margin-bottom: 3rem;
}

/* 时间轴竖线 */
.page-news__timeline-line {
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--timeline-line-color);
  border-radius: 2px;
}

/* 时间线列表 */
.page-news__timeline {
  position: relative;
  padding-left: 50px;
}

.page-news__timeline-item {
  position: relative;
  margin-bottom: 2rem;
  list-style: none;
}

/* 圆点 */
.page-news__timeline-dot {
  position: absolute;
  left: -40px;
  top: 1.5rem;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border: 3px solid var(--color-white);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--color-accent);
  z-index: 1;
}

/* 卡片 */
.page-news__timeline-card {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 1.25rem;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  position: relative;
}
.page-news__timeline-card:hover,
.page-news__timeline-card:focus-within {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-3px);
}

/* 卡片头部标签 */
.page-news__card-header {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.5rem;
}
.page-news__card-tag {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--color-accent-light);
  color: var(--color-accent);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
}
.page-news__card-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-gray);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* 卡片标题 */
.page-news__card-title {
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 1.2rem;
  color: var(--color-text);
  margin: 0 0 0.5rem 0;
}

/* 卡片图片 */
.page-news__card-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 4px;
  margin-bottom: 0.75rem;
  object-fit: cover;
}

/* 摘要 */
.page-news__card-summary {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

/* 展开/收起按钮 */
.page-news__card-toggle {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-accent);
  background: none;
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  padding: 0.3rem 0.8rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.page-news__card-toggle:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

/* 详情区域（默认隐藏，渐进增强） */
.page-news__card-details {
  display: none;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-primary-light);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.6;
}
.page-news__card-details[data-open] {
  display: block;
}

/* ===== 行业观察区域 ===== */
.page-news__insight-section {
  margin-bottom: 3rem;
}

.page-news__insight-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-news__insight-card {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 1.25rem;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.page-news__insight-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-3px);
}

.page-news__insight-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 4px;
  margin-bottom: 0.75rem;
  object-fit: cover;
}

.page-news__insight-title {
  font-family: var(--font-heading);
  font-weight: bold;
  font-size: 1.15rem;
  color: var(--color-primary);
  margin: 0 0 0.5rem 0;
}

.page-news__insight-text {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.page-news__insight-link {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.page-news__insight-link:hover {
  color: var(--color-primary);
}

/* 底部行动条 */
.page-news__action-bar {
  text-align: center;
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-primary-light);
}
.page-news__action-bar p {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
}
.page-news__action-link {
  color: var(--color-accent);
  text-decoration: underline;
  font-weight: 500;
}
.page-news__action-link:hover {
  color: var(--color-primary);
}

/* ===== 移动端优先 ===== */
/* 默认已经是移动端（小屏）布局，下面调整桌面端 */
@media (min-width: 768px) {
  .page-news__inner {
    padding: 2rem 3rem;
  }
  .page-news__page-title {
    font-size: 2.5rem;
  }
  .page-news__timeline {
    padding-left: 70px;
  }
  .page-news__timeline-line {
    left: 30px;
  }
  .page-news__timeline-dot {
    left: -56px;
    width: 18px;
    height: 18px;
  }
  .page-news__timeline-card {
    padding: 1.5rem;
  }
  .page-news__insight-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-news__calendar-img {
    margin-bottom: 2.5rem;
  }
  .page-news__card-img {
    max-width: 80%;
    display: block;
    margin-left: auto;
    margin-right: auto;
  }
}

/* 大于960px进一步优化 */
@media (min-width: 960px) {
  .page-news__timeline {
    padding-left: 80px;
  }
  .page-news__timeline-line {
    left: 35px;
  }
  .page-news__timeline-dot {
    left: -64px;
  }
  .page-news__insight-grid {
    gap: 2rem;
  }
  .page-news__insight-card {
    padding: 1.75rem;
  }
}