/* ===== 当前页面专属 CSS：品牌动态 ===== */
.page-news {
  /* 页面级变量 */
  --page-news-card-min-width: 280px;
  --page-news-card-gap: 1.5rem;
  --page-news-top-height: 8px;

  padding: 2rem 1rem;
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  background-color: var(--light-gray, #F5F5F5);
}

/* 面包屑 */
.page-news .breadcrumb {
  margin-bottom: 1rem;
  font-size: 0.875rem;
}
.page-news .breadcrumb ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.page-news .breadcrumb li::after {
  content: '/';
  margin-left: 0.5rem;
  color: var(--deep-gray, #424242);
}
.page-news .breadcrumb li:last-child::after {
  content: none;
}
.page-news .breadcrumb a {
  color: var(--deep-blue, #1A237E);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* 页面主标题 */
.page-news__heading {
  font-family: var(--fonts-heading, 'Impact', 'Arial Black', sans-serif);
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 900;
  font-style: italic;
  color: var(--deep-blue, #1A237E);
  margin: 0 0 2rem;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  border-left: 8px solid var(--orange, #FF5722);
  padding-left: 1rem;
}

/* 章节通用 */
.page-news__section {
  margin-bottom: 3rem;
}
.page-news__section-title {
  font-family: var(--fonts-heading, 'Impact', 'Arial Black', sans-serif);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  font-style: italic;
  color: var(--deep-blue, #1A237E);
  margin: 0 0 0.5rem;
  position: relative;
  display: inline-block;
}
.page-news__section-title::after {
  content: '';
  display: block;
  width: 60%;
  height: 4px;
  background: var(--green, #4CAF50);
  margin-top: 0.25rem;
}
.page-news__section-intro {
  font-size: 1rem;
  color: var(--deep-gray, #424242);
  margin: 0 0 1.5rem;
  max-width: 700px;
}

/* 筛选标签 */
.page-news__filter-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 2rem;
}
.page-news__filter-label {
  font-family: inherit;
  font-size: 0.875rem;
  padding: 0.4rem 1rem;
  border: 2px solid var(--green, #4CAF50);
  background: transparent;
  color: var(--deep-blue, #1A237E);
  border-radius: var(--radius, 12px);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.page-news__filter-label--active,
.page-news__filter-label:hover,
.page-news__filter-label:focus-visible {
  background: var(--green, #4CAF50);
  color: var(--white, #fff);
  border-color: var(--green, #4CAF50);
}

/* 卡片网格 */
.page-news__card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--page-news-card-gap);
}

/* 单张卡片 */
.page-news__card {
  background: var(--white, #fff);
  border-radius: var(--radius, 12px);
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}
.page-news__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

/* 卡片顶部斜线色块 */
.page-news__card-top {
  height: var(--page-news-top-height);
  width: 100%;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 0);
  flex-shrink: 0;
}

/* 卡片图片 */
.page-news__card-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  object-fit: cover;
}

/* 卡片主体 */
.page-news__card-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.page-news__card-title {
  font-family: var(--fonts-heading, 'Impact', 'Arial Black', sans-serif);
  font-size: 1.25rem;
  font-weight: 700;
  font-style: italic;
  color: var(--deep-blue, #1A237E);
  margin: 0 0 0.75rem;
  line-height: 1.2;
}
.page-news__card-summary {
  font-size: 0.9375rem;
  color: var(--deep-gray, #424242);
  line-height: 1.6;
  margin: 0 0 1rem;
  flex: 1;
}
.page-news__card-full {
  font-size: 0.9375rem;
  color: var(--deep-gray, #424242);
  line-height: 1.6;
  margin-bottom: 1rem;
  display: none; /* 默认隐藏，由JS展开 */
}
.page-news__card-full[data-open] {
  display: block;
}
.page-news__card-toggle {
  align-self: flex-start;
  margin-top: auto;
}

/* 技术博客卡片特殊处理 */
.page-news__card--blog {
  margin-bottom: 1.5rem;
}
.page-news__card--blog .page-news__card-body {
  order: -1; /* 移动端图片在下方 */
}
.page-news__card--blog .page-news__card-img {
  order: 1;
}

/* ===== 响应式：平板及以上 ===== */
@media (min-width: 768px) {
  .page-news {
    padding: 3rem 2rem;
  }
  .page-news__card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  /* 技术博客卡片：左右布局 */
  .page-news__card--blog {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-news__card--blog .page-news__card-body {
    order: 1;
    flex: 2;
    padding: 1.5rem;
  }
  .page-news__card--blog .page-news__card-img {
    flex: 1;
    min-width: 200px;
    max-width: 300px;
    order: 0;
    object-fit: cover;
    height: auto;
    border-radius: var(--radius, 12px) 0 0 var(--radius, 12px);
  }
  .page-news__card--blog .page-news__card-top {
    display: none; /* 桌面端隐藏顶部色块，用背景色区分 */
  }
  .page-news__card--blog:nth-child(odd) {
    flex-direction: row-reverse;
  }
  .page-news__card--blog:nth-child(odd) .page-news__card-img {
    border-radius: 0 var(--radius, 12px) var(--radius, 12px) 0;
  }
}

/* ===== 大桌面调整 ===== */
@media (min-width: 1024px) {
  .page-news__card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  /* 技术博客区域保持单列或两列 */
  #tech-blog .page-news__card-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-news__card--blog {
    flex-direction: column;
  }
  .page-news__card--blog .page-news__card-img {
    max-width: 100%;
    border-radius: var(--radius, 12px) var(--radius, 12px) 0 0;
  }
  .page-news__card--blog .page-news__card-body {
    order: 1;
  }
  .page-news__card--blog .page-news__card-top {
    display: block;
  }
}

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

/* 阅读按钮样式增强 */
.page-news .btn-accent {
  background: var(--orange, #FF5722);
  color: var(--white, #fff);
  border: none;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius, 12px);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.page-news .btn-accent:hover,
.page-news .btn-accent:focus-visible {
  background: #e64a19;
  transform: scale(1.02);
}
.page-news .btn-accent[aria-expanded="true"] {
  background: var(--deep-blue, #1A237E);
}

/* 展开内容过渡（渐进增强） */
.page-news__card-full {
  transition: all 0.3s ease;
}
</<PAGE_CSS>>

.page-news {
  --fonts-heading: inherit;
}