/* ============================================================
   page-news ｜ 行业观察
   作用域：.page-news 内所有专属样式
   移动端优先 + 桌面断点 768px
   ============================================================ */
.page-news {
  --news-gap: 1.5rem;
  --news-radius: 12px;
  --news-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --hero-clip-offset: 16px;

  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 1rem 1rem 2.5rem;
  max-width: var(--content-max-width, 1200px);
  margin: 0 auto;
  background-color: var(--color-white, #fff);
  color: var(--color-dark-gray, #333);
  font-family: var(--font-body, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif);
}

/* ---------- 面包屑（共享 class 补充） ---------- */
.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  font-size: 0.85rem;
  color: var(--color-secondary-teal, #1A4A5A);
  padding: 0.25rem 0;
}
.page-news .breadcrumb a {
  color: var(--color-accent, #FF7A00);
  text-decoration: none;
  font-weight: 500;
  transition: opacity var(--news-transition);
}
.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  opacity: 0.75;
  outline: 2px solid var(--color-accent, #FF7A00);
  outline-offset: 2px;
}
.page-news .breadcrumb .separator {
  color: var(--color-secondary-teal, #1A4A5A);
  opacity: 0.5;
}
.page-news .breadcrumb [aria-current="page"] {
  font-weight: 600;
  color: var(--color-primary, #0F1B2D);
}

/* ---------- Hero 框景区域 ---------- */
.page-news .news-hero {
  position: relative;
  background: var(--color-primary, #0F1B2D);
  color: var(--color-text-on-dark, #E0E0E0);
  padding: 2rem 1.5rem;
  border-radius: var(--news-radius);
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--hero-clip-offset)),
    calc(100% - var(--hero-clip-offset)) 100%,
    0 100%
  );
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  overflow: hidden;
}
.page-news .hero-frame {
  position: relative;
  z-index: 1;
  border-left: 4px solid var(--color-accent, #FF7A00);
  padding-left: 1rem;
}
.page-news .hero-title {
  font-family: var(--font-heading, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif);
  font-weight: 800;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  line-height: 1.15;
  margin: 0 0 0.4rem;
  color: var(--color-white, #fff);
  letter-spacing: -0.01em;
}
.page-news .hero-desc {
  font-size: 1rem;
  line-height: 1.5;
  max-width: 640px;
  margin: 0;
  color: var(--color-text-on-dark, #E0E0E0);
  opacity: 0.9;
}
.page-news .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  position: relative;
  z-index: 1;
}
.page-news .hero-meta .badge {
  background: var(--color-accent-wine, #8B2252);
  color: var(--color-white, #fff);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  letter-spacing: 0.03em;
}
/* 框景装饰斜线 */
.page-news .news-hero::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, transparent 50%, var(--color-accent, #FF7A00) 50%);
  opacity: 0.12;
  pointer-events: none;
}

/* ---------- 筛选栏 ---------- */
.page-news .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.25rem 0;
  border-bottom: 2px solid var(--color-light-gray, #F4F4F4);
  padding-bottom: 0.75rem;
}
.page-news .filter-btn {
  background: transparent;
  border: 1.5px solid var(--color-secondary-teal, #1A4A5A);
  color: var(--color-secondary-teal, #1A4A5A);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 1.2rem;
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--news-transition);
}
.page-news .filter-btn:hover,
.page-news .filter-btn:focus-visible {
  border-color: var(--color-accent, #FF7A00);
  color: var(--color-accent, #FF7A00);
}
.page-news .filter-btn.is-active {
  background: var(--color-accent, #FF7A00);
  border-color: var(--color-accent, #FF7A00);
  color: var(--color-white, #fff);
}

/* ---------- 区域标题 ---------- */
.page-news .section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.page-news .section-label h2 {
  font-family: var(--font-heading, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif);
  font-weight: 800;
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  color: var(--color-primary, #0F1B2D);
  margin: 0;
  letter-spacing: -0.01em;
}
.page-news .diagonal-line {
  display: inline-block;
  width: 32px;
  height: 4px;
  background: linear-gradient(135deg, var(--color-accent, #FF7A00) 50%, transparent 50%);
  background-size: 8px 8px;
  flex-shrink: 0;
}

/* ---------- 最新观察布局 ---------- */
.page-news .latest-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
/* 特色大卡片 */
.page-news .featured-card {
  background: var(--color-light-gray, #F4F4F4);
  border-radius: var(--news-radius);
  overflow: hidden;
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - 12px),
    calc(100% - 12px) 100%,
    0 100%
  );
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--news-transition);
}
.page-news .featured-card:hover {
  box-shadow: 0 8px 24px rgba(15, 27, 45, 0.12);
}
.page-news .card-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-primary, #0F1B2D);
}
.page-news .card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.page-news .featured-card:hover .card-img {
  transform: scale(1.03);
}
.page-news .status-dot {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--color-white, #fff);
}
.page-news .status-dot[data-status="live"] {
  background: var(--color-accent, #FF7A00);
  box-shadow: 0 0 8px var(--color-accent, #FF7A00);
}
.page-news .card-body {
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.page-news .card-meta {
  display: flex;
  gap: 0.5rem;
}
.page-news .card-title {
  font-family: var(--font-heading, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-primary, #0F1B2D);
  margin: 0;
}
.page-news .card-summary {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--color-dark-gray, #333);
  margin: 0;
}
.page-news .card-full {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--color-dark-gray, #333);
  padding-top: 0.4rem;
  border-top: 1px dashed var(--color-secondary-teal, #1A4A5A);
  display: none;
}
.page-news .card-full[data-expanded="true"] {
  display: block;
  animation: fadeSlideIn 0.3s ease;
}
.page-news .expand-btn {
  background: transparent;
  border: none;
  color: var(--color-accent, #FF7A00);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  text-align: left;
  transition: opacity var(--news-transition);
  align-self: flex-start;
}
.page-news .expand-btn:hover,
.page-news .expand-btn:focus-visible {
  opacity: 0.75;
  outline: 2px solid var(--color-accent, #FF7A00);
  outline-offset: 2px;
}
.page-news .card-link {
  color: var(--color-accent, #FF7A00);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  align-self: flex-start;
  transition: opacity var(--news-transition);
}
.page-news .card-link:hover,
.page-news .card-link:focus-visible {
  opacity: 0.75;
  outline: 2px solid var(--color-accent, #FF7A00);
  outline-offset: 2px;
}

/* 侧边列表 */
.page-news .latest-side {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-news .side-item {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--color-white, #fff);
  border: 1px solid var(--color-light-gray, #F4F4F4);
  border-radius: var(--news-radius);
  padding: 1rem;
  transition: box-shadow var(--news-transition), border-color var(--news-transition);
}
.page-news .side-item:hover {
  border-color: var(--color-accent, #FF7A00);
  box-shadow: 0 4px 12px rgba(255, 122, 0, 0.08);
}
.page-news .side-img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 6px;
  display: block;
}
.page-news .side-text {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.page-news .side-title {
  font-family: var(--font-heading, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary, #0F1B2D);
  margin: 0;
}
.page-news .side-summary {
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--color-dark-gray, #333);
  margin: 0;
}
.page-news .side-full {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--color-dark-gray, #333);
  padding-top: 0.3rem;
  border-top: 1px dashed var(--color-secondary-teal, #1A4A5A);
  display: none;
}
.page-news .side-full[data-expanded="true"] {
  display: block;
  animation: fadeSlideIn 0.3s ease;
}

/* ---------- 分隔装饰 ---------- */
.page-news .section-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.25rem 0;
}
.page-news .divider-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-secondary-teal, #1A4A5A), transparent);
}
.page-news .divider-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent, #FF7A00);
  flex-shrink: 0;
}

/* ---------- 使用技巧网格 ---------- */
.page-news .news-tips {
  padding: 0.5rem 0;
}
.page-news .tips-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.page-news .tip-card {
  background: var(--color-primary, #0F1B2D);
  color: var(--color-text-on-dark, #E0E0E0);
  border-radius: var(--news-radius);
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - 12px),
    calc(100% - 12px) 100%,
    0 100%
  );
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  overflow: hidden;
  transition: transform var(--news-transition), box-shadow var(--news-transition);
}
.page-news .tip-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(15, 27, 45, 0.25);
}
.page-news .tip-number {
  font-family: var(--font-data, 'Courier New', Consolas, monospace);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent, #FF7A00);
  letter-spacing: 0.05em;
  opacity: 0.7;
}
.page-news .tip-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 6px;
  display: block;
  margin: 0.25rem 0;
}
.page-news .tip-body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.page-news .tip-title {
  font-family: var(--font-heading, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-white, #fff);
  margin: 0;
}
.page-news .tip-summary {
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--color-text-on-dark, #E0E0E0);
  margin: 0;
  opacity: 0.85;
}
.page-news .tip-full {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--color-text-on-dark, #E0E0E0);
  padding-top: 0.3rem;
  border-top: 1px dashed var(--color-secondary-teal, #1A4A5A);
  display: none;
}
.page-news .tip-full[data-expanded="true"] {
  display: block;
  animation: fadeSlideIn 0.3s ease;
}
.page-news .tip-link {
  color: var(--color-accent, #FF7A00);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.85rem;
  align-self: flex-start;
  transition: opacity var(--news-transition);
  margin-top: 0.25rem;
}
.page-news .tip-link:hover,
.page-news .tip-link:focus-visible {
  opacity: 0.75;
  outline: 2px solid var(--color-accent, #FF7A00);
  outline-offset: 2px;
}
/* 技巧卡斜线装饰 */
.page-news .tip-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 50%, var(--color-accent-wine, #8B2252) 50%);
  opacity: 0.15;
  pointer-events: none;
}

/* ---------- 内容索引网格 ---------- */
.page-news .news-index {
  padding: 0.25rem 0;
}
.page-news .index-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.page-news .index-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--color-white, #fff);
  border: 1px solid var(--color-light-gray, #F4F4F4);
  border-left: 4px solid var(--color-accent, #FF7A00);
  border-radius: 0 var(--news-radius) var(--news-radius) 0;
  padding: 1rem;
  transition: box-shadow var(--news-transition), border-color var(--news-transition);
}
.page-news .index-card:hover {
  border-left-color: var(--color-accent-wine, #8B2252);
  box-shadow: 0 4px 16px rgba(139, 34, 82, 0.08);
}
.page-news .index-num {
  font-family: var(--font-data, 'Courier New', Consolas, monospace);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-accent, #FF7A00);
  line-height: 1;
  opacity: 0.5;
}
.page-news .index-img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 6px;
  display: block;
}
.page-news .index-body {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.page-news .index-title {
  font-family: var(--font-heading, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary, #0F1B2D);
  margin: 0;
}
.page-news .index-text {
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--color-dark-gray, #333);
  margin: 0;
}
.page-news .index-link {
  color: var(--color-accent, #FF7A00);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.85rem;
  align-self: flex-start;
  transition: opacity var(--news-transition);
  margin-top: 0.2rem;
}
.page-news .index-link:hover,
.page-news .index-link:focus-visible {
  opacity: 0.75;
  outline: 2px solid var(--color-accent, #FF7A00);
  outline-offset: 2px;
}

/* ---------- 返回顶部按钮 ---------- */
.page-news .scroll-top-btn {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary, #0F1B2D);
  color: var(--color-white, #fff);
  border: 2px solid var(--color-accent, #FF7A00);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--news-transition), visibility var(--news-transition), transform var(--news-transition);
  box-shadow: 0 4px 12px rgba(15, 27, 45, 0.3);
}
.page-news .scroll-top-btn:hover,
.page-news .scroll-top-btn:focus-visible {
  transform: translateY(-3px);
  opacity: 0.9;
}
/* 使用 data-scroll-top 属性控制显示（JS 增强） */
.page-news .scroll-top-btn[data-visible] {
  opacity: 1;
  visibility: visible;
}

/* ---------- 动画 ---------- */
@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   桌面端（≥768px）
   ============================================================ */
@media (min-width: 768px) {
  .page-news {
    padding: 1.5rem 2rem 3rem;
    gap: 2.5rem;
  }

  .page-news .news-hero {
    padding: 3rem 2.5rem;
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
  .page-news .hero-frame {
    max-width: 70%;
  }
  .page-news .hero-title {
    font-size: clamp(2rem, 4vw, 3rem);
  }
  .page-news .hero-desc {
    font-size: 1.05rem;
  }
  .page-news .hero-meta {
    flex-shrink: 0;
  }

  .page-news .latest-layout {
    flex-direction: row;
    align-items: stretch;
  }
  .page-news .featured-card {
    flex: 2;
    flex-direction: row;
    align-items: stretch;
  }
  .page-news .featured-card .card-visual {
    width: 45%;
    aspect-ratio: auto;
    min-height: 280px;
  }
  .page-news .featured-card .card-body {
    width: 55%;
    padding: 1.5rem;
    justify-content: center;
  }
  .page-news .latest-side {
    flex: 1;
    min-width: 240px;
  }
  .page-news .side-item {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-news .side-img {
    width: 100px;
    height: 80px;
    flex-shrink: 0;
    border-radius: 4px;
  }

  .page-news .tips-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-news .tip-card {
    padding: 1.5rem 1.25rem;
  }

  .page-news .index-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-news .index-card {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-news .index-num {
    font-size: 2rem;
    min-width: 2.2rem;
  }
  .page-news .index-img {
    width: 140px;
    height: 94px;
    flex-shrink: 0;
  }

  .page-news .filter-bar {
    padding-bottom: 1rem;
  }
  .page-news .filter-btn {
    font-size: 0.9rem;
    padding: 0.45rem 1.4rem;
  }
}

/* ============================================================
   桌面大屏（≥1024px）
   ============================================================ */
@media (min-width: 1024px) {
  .page-news {
    padding: 2rem 2.5rem 4rem;
    gap: 3rem;
  }
  .page-news .index-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-news .latest-side {
    min-width: 280px;
  }
}