/* page-news 页面专属样式 */
.page-news {
  --page-news-accent: #D4AF37;
  --page-news-accent-glow: rgba(212, 175, 55, 0.25);
  --page-news-number-size: 4.5rem;
  --page-news-sidebar-width: 280px;
  --page-news-gap: 2rem;
  --page-news-card-bg: rgba(17, 34, 64, 0.7);
  --page-news-card-border: 1px solid rgba(30, 58, 95, 0.6);
  --page-news-radius: 8px;

  display: block;
  width: 100%;
  max-width: var(--content-max-width, 1280px);
  margin: 0 auto;
  padding: 0 var(--gap, 1.5rem);
  color: var(--text-primary, #E2E8F0);
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  background: transparent;
}

/* ===== 容器 ===== */
.page-news__container {
  width: 100%;
  padding: 2rem 0 4rem;
}

/* ===== 面包屑 ===== */
.page-news__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary, #94A3B8);
  margin-bottom: 1rem;
  letter-spacing: 0.03em;
}
.page-news__breadcrumb a {
  color: var(--page-news-accent);
  text-decoration: none;
  transition: opacity var(--transition, 0.3s);
}
.page-news__breadcrumb a:hover {
  opacity: 0.7;
}
.page-news__breadcrumb-sep {
  font-size: 0.6rem;
  opacity: 0.5;
}

/* ===== 页面标题 ===== */
.page-news__header {
  margin-bottom: 2.5rem;
  position: relative;
}
.page-news__header::after {
  content: '';
  display: block;
  width: 80px;
  height: 3px;
  background: var(--page-news-accent);
  margin-top: 0.75rem;
  border-radius: 2px;
}
.page-news__heading {
  font-family: var(--font-heading, 'Orbitron', sans-serif);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--text-primary, #E2E8F0);
  margin: 0 0 0.5rem;
  letter-spacing: 0.04em;
  line-height: 1.2;
}
.page-news__subhead {
  font-size: 1.05rem;
  color: var(--text-secondary, #94A3B8);
  line-height: 1.6;
  max-width: 680px;
  margin: 0;
}

/* ===== 布局：主内容 + 侧栏 ===== */
.page-news__layout {
  display: flex;
  gap: var(--page-news-gap);
  align-items: flex-start;
}
.page-news__articles {
  flex: 1;
  min-width: 0;
}
.page-news__sidebar {
  width: var(--page-news-sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--header-height, 120px) + 1rem);
}

/* ===== 单篇文章 ===== */
.page-news__article {
  display: flex;
  gap: 1.2rem;
  padding: 1.5rem 0;
  border-bottom: var(--page-news-card-border);
  transition: background var(--transition, 0.3s);
  position: relative;
}
.page-news__article:first-of-type {
  padding-top: 0;
}
.page-news__article:last-of-type {
  border-bottom: none;
}
.page-news__article:hover {
  background: rgba(212, 175, 55, 0.03);
}
.page-news__article-number {
  font-family: var(--font-heading, 'Orbitron', sans-serif);
  font-size: var(--page-news-number-size);
  font-weight: 900;
  color: rgba(212, 175, 55, 0.12);
  line-height: 1;
  min-width: 2.8rem;
  text-align: right;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  letter-spacing: -0.02em;
  user-select: none;
  pointer-events: none;
}
.page-news__article-body {
  flex: 1;
  min-width: 0;
}
.page-news__article-header {
  margin-bottom: 0.6rem;
}
.page-news__article-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--page-news-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(212, 175, 55, 0.1);
  padding: 0.15rem 0.6rem;
  border-radius: 3px;
  margin-bottom: 0.3rem;
}
.page-news__article-title {
  font-family: var(--font-heading, 'Orbitron', sans-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary, #E2E8F0);
  margin: 0;
  line-height: 1.3;
}

/* 文章可展开内容 */
.page-news__article-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}
.page-news__article-content[data-revealed] {
  grid-template-rows: 1fr;
}
.page-news__article-content > * {
  overflow: hidden;
}
.page-news__article-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary, #94A3B8);
}
.page-news__article-text p {
  margin: 0 0 0.6rem;
}
.page-news__article-text p:last-child {
  margin-bottom: 0;
}
.page-news__article-image {
  margin-top: 1rem;
}
.page-news__article-image img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--page-news-radius);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  border: 1px solid rgba(212, 175, 55, 0.1);
  transition: transform var(--transition, 0.3s);
}
.page-news__article-image img:hover {
  transform: scale(1.01);
}

/* 展开/收起按钮 */
.page-news__article-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.8rem;
  padding: 0.4rem 1rem;
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--page-news-accent);
  background: transparent;
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition, 0.3s);
}
.page-news__article-toggle:hover {
  background: rgba(212, 175, 55, 0.1);
  border-color: var(--page-news-accent);
}
.page-news__article-toggle[aria-expanded="true"] {
  background: rgba(212, 175, 55, 0.12);
  border-color: var(--page-news-accent);
}

/* ===== 侧栏 ===== */
.page-news__sidebar-card {
  background: var(--page-news-card-bg);
  border: var(--page-news-card-border);
  border-radius: var(--page-news-radius);
  padding: 1.2rem 1.2rem 1.5rem;
  margin-bottom: 1.2rem;
  backdrop-filter: blur(6px);
  box-shadow: 0 2px 16px rgba(0,0,0,0.2);
}
.page-news__sidebar-card:last-child {
  margin-bottom: 0;
}
.page-news__sidebar-title {
  font-family: var(--font-heading, 'Orbitron', sans-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary, #E2E8F0);
  margin: 0 0 0.5rem;
  letter-spacing: 0.04em;
}
.page-news__sidebar-desc {
  font-size: 0.85rem;
  color: var(--text-secondary, #94A3B8);
  margin: 0 0 0.8rem;
  line-height: 1.5;
}
.page-news__export-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: #060E1E;
  background: var(--page-news-accent);
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: all var(--transition, 0.3s);
  box-shadow: 0 0 20px var(--page-news-accent-glow);
}
.page-news__export-btn:hover {
  background: #e0c04a;
  box-shadow: 0 0 30px rgba(212, 175, 55, 0.4);
  transform: translateY(-1px);
}
.page-news__export-icon {
  font-size: 1.1rem;
}
.page-news__export-note {
  font-size: 0.7rem;
  color: var(--text-secondary, #94A3B8);
  text-align: center;
  margin-top: 0.4rem;
  opacity: 0.6;
}
.page-news__sidebar-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.page-news__sidebar-links li {
  margin-bottom: 0.4rem;
}
.page-news__sidebar-links li:last-child {
  margin-bottom: 0;
}
.page-news__sidebar-links .nav-link {
  color: var(--text-secondary, #94A3B8);
  font-size: 0.88rem;
  text-decoration: none;
  transition: color var(--transition, 0.3s);
  display: block;
  padding: 0.25rem 0;
}
.page-news__sidebar-links .nav-link:hover {
  color: var(--page-news-accent);
}
.page-news__sidebar-trust {
  font-size: 0.8rem;
  color: var(--text-secondary, #94A3B8);
  line-height: 1.6;
  margin: 0 0 0.4rem;
}
.page-news__sidebar-icp {
  font-size: 0.75rem;
  color: rgba(148, 163, 184, 0.5);
  font-family: var(--font-mono, 'Fira Code', monospace);
}

/* ===== 响应式：窄屏 ===== */
@media (max-width: 768px) {
  .page-news {
    padding: 0 1rem;
  }
  .page-news__container {
    padding: 1.5rem 0 3rem;
  }
  .page-news__heading {
    font-size: 2rem;
  }
  .page-news__subhead {
    font-size: 0.95rem;
  }
  .page-news__layout {
    flex-direction: column;
  }
  .page-news__sidebar {
    width: 100%;
    position: static;
    margin-top: 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  .page-news__sidebar-card {
    margin-bottom: 0;
  }
  .page-news__sidebar-card:last-child {
    grid-column: 1 / -1;
  }
  .page-news__article {
    flex-direction: column;
    gap: 0.5rem;
  }
  .page-news__article-number {
    writing-mode: horizontal-tb;
    transform: none;
    font-size: 2.8rem;
    text-align: left;
    min-width: auto;
    color: rgba(212, 175, 55, 0.18);
  }
  .page-news__article-title {
    font-size: 1.2rem;
  }
  .page-news__article-image img {
    max-width: 100%;
  }
  .page-news__export-btn {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .page-news__heading {
    font-size: 1.6rem;
  }
  .page-news__sidebar {
    grid-template-columns: 1fr;
  }
  .page-news__article-number {
    font-size: 2.2rem;
  }
  .page-news__article-toggle {
    width: 100%;
    justify-content: center;
  }
}