/* ==========================================================================
   新闻详情页样式 (news-detail.css) - v2 修正版
   ========================================================================== */

/* 基础与变量
----------------------------------------------------------------------------- */
:root {
  --text-color: #333; /* 主要文字颜色 */
  --light-text-color: #666; /* 次要文字颜色 */
  --border-color: #e5e5e5; /* 边框颜色 */
  --background-color: #f4f7f9; /* 背景色 */
  --system-sans-serif-font: -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif; /* 系统默认无衬线字体 */
}

/* 面包屑导航
----------------------------------------------------------------------------- */
.breadcrumb-section {
  background-color: #fff;
  padding: 15px 0;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb {
  display: flex;
  align-items: center;
  font-size: 14px;
}

.breadcrumb a {
  color: var(--light-text-color);
  transition: color 0.3s;
}

.breadcrumb a:hover {
  color: var(--primary-color);
}

.breadcrumb span {
  color: var(--text-color);
}

.breadcrumb .fa-chevron-right {
  font-size: 10px;
  color: var(--light-text-color);
  margin: 0 10px;
}

/* 文章主区域
----------------------------------------------------------------------------- */
.article-main {
  padding: 60px 0;
  background-color: #fff;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px; /* 修正：主内容区可收缩，侧边栏固定 */
  gap: 50px;
}

/* 文章内容
----------------------------------------------------------------------------- */
.article-content {
  min-width: 0; /* 防止内容溢出 */
}

/* 文章头部 */
.article-header {
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
}

.article-category {
  display: inline-block;
  background-color: var(--primary-color);
  color: #fff;
  padding: 5px 12px;
  font-size: 14px;
  font-weight: bold;
  border-radius: 4px;
  margin-bottom: 15px;
}

.article-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary-color);
  line-height: 1.3;
  margin-bottom: 20px;
  font-family: var(--system-sans-serif-font) !important;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  font-size: 14px;
  color: var(--light-text-color);
}

.article-meta .meta-item {
  display: flex;
  align-items: center;
}

.article-meta .meta-item i {
  margin-right: 8px;
  color: #999;
}

/* 文章摘要 */
.article-summary {
  background-color: var(--background-color);
  padding: 25px;
  border-radius: 8px;
  margin-bottom: 30px;
}

.article-summary p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--light-text-color);
  margin: 0;
}

/* 文章正文 */
.article-body {
  font-family: var(--system-sans-serif-font) !important;
  color: var(--text-color);
}

.article-body p {
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.article-body h2 {
  font-family: var(--system-sans-serif-font) !important;
  font-size: 28px;
  font-weight: 600;
  color: var(--primary-color);
  margin: 40px 0 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-color);
}

.article-body h3 {
  font-family: var(--system-sans-serif-font) !important;
  font-size: 22px;
  font-weight: 600;
  color: var(--primary-color);
  margin: 30px 0 15px;
}

.article-body ul,
.article-body ol {
  padding-left: 25px;
  margin-bottom: 20px;
}

.article-body li {
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 10px;
}

.article-body a {
  color: var(--primary-color);
  text-decoration: underline;
  transition: color 0.3s;
}

.article-body a:hover {
  color: var(--primary-color);
}

.article-body strong {
  font-weight: bold;
}

.article-body .article-image {
  margin: 30px 0;
}

.article-body .article-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.article-body .article-image figcaption {
  font-size: 14px;
  color: var(--light-text-color);
  text-align: center;
  margin-top: 10px;
  font-style: italic;
}

.article-body .article-quote {
  margin: 30px 0;
  padding: 25px;
  background-color: var(--background-color);
  border-left: 4px solid #ccc;
  font-style: italic;
}

.article-body .article-quote p {
  font-size: 18px;
  margin-bottom: 15px;
  color: #555;
}

.article-body .article-quote cite {
  font-size: 15px;
  color: var(--light-text-color);
  display: block;
  text-align: right;
}

.article-body .article-highlight {
  background-color: #fff8e1;
  border: 1px solid #ffecb3;
  border-radius: 8px;
  padding: 25px;
  margin: 30px 0;
}

.article-body .article-highlight h3 {
  color: #c07d00;
  margin-top: 0;
}

.article-body .document .section p {
  font-family: var(--system-sans-serif-font) !important;
}

.article-body .document .section span {
  font-family: var(--system-sans-serif-font) !important;
}

/* 文章标签和分享 */
.article-tags {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.article-tags .tag {
  background-color: #eef2f5;
  color: var(--light-text-color);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 13px;
  transition: all 0.3s;
}

.article-tags .tag:hover {
  background-color: var(--primary-color);
  color: #fff;
}

.article-share {
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 20px;
}

.article-share h4 {
  font-size: 16px;
  color: var(--text-color);
  margin: 0;
}

.share-buttons {
  display: flex;
  gap: 10px;
}

.share-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background-color: #fff;
  color: var(--light-text-color);
  font-size: 18px;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  justify-content: center;
  align-items: center;
}

.share-btn.wechat:hover {
  background-color: #28c422;
  color: #fff;
  border-color: #28c422;
}
.share-btn.weibo:hover {
  background-color: #e6162d;
  color: #fff;
  border-color: #e6162d;
}
.share-btn.qq:hover {
  background-color: #12b7f5;
  color: #fff;
  border-color: #12b7f5;
}
.share-btn.copy:hover {
  background-color: var(--primary-color);
  color: #fff;
  border-color: var(--primary-color);
}

/* 侧边栏
----------------------------------------------------------------------------- */
.article-sidebar {
  position: sticky;
  top: 120px; /* 考虑顶部导航栏高度 */
  align-self: start;
}

.sidebar-widget {
  background-color: var(--background-color);
  padding: 25px;
  border-radius: 8px;
  margin-bottom: 30px;
}

.sidebar-widget h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary-color);
  margin-top: 0;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

/* 相关文章 */
.related-articles .related-item {
  display: flex;
  gap: 15px;
  margin-bottom: 20px;
}
.related-articles .related-item:last-child {
  margin-bottom: 0;
}

.related-item .related-image {
  width: 80px;
  height: 60px;
  flex-shrink: 0;
}

.related-item .related-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 4px;
}

.related-item .related-content h4 {
  font-size: 15px;
  line-height: 1.4;
  margin: 0 0 5px;
}

.related-item .related-content h4 a {
  color: var(--text-color);
  transition: color 0.3s;
}

.related-item .related-content h4 a:hover {
  color: var(--primary-color);
}

.related-item .related-date {
  font-size: 13px;
  color: var(--light-text-color);
}

/* 专家咨询 */
.consultation-content p {
  font-size: 15px;
  color: var(--light-text-color);
  line-height: 1.6;
  margin-bottom: 20px;
}
.consultation-content .btn {
  padding: var(--spacing-2);
}

/* 响应式设计
----------------------------------------------------------------------------- */
@media (max-width: 991px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .article-sidebar {
    position: static;
    top: auto;
  }

  .article-title {
    font-size: 30px;
  }

  .article-body h2 {
    font-size: 24px;
  }
}

@media (max-width: 767px) {
  .article-main {
    padding: 40px 0;
  }

  .article-title {
    font-size: 26px;
  }

  .article-meta {
    gap: 8px 15px;
    font-size: 13px;
  }

  .article-body p,
  .article-body li {
    font-size: 16px;
  }

  .article-share {
    flex-direction: column;
    align-items: flex-start;
  }

  /* 移动端文章导航 */
  .article-navigation {
    flex-direction: column;
    gap: 15px;
  }

  .nav-link {
    padding: 15px;
  }

  .nav-title {
    font-size: 14px;
  }
}

/* 文章导航样式
----------------------------------------------------------------------------- */
.article-navigation {
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 20px;
}

.nav-item {
  flex: 1;
  min-height: 80px;
}

.nav-link {
  display: block;
  padding: 20px;
  background: var(--background-color);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-color);
  transition: all 0.3s ease;
  height: 100%;
  box-sizing: border-box;
  border: 1px solid transparent;
}

.nav-link:hover {
  background: #fff;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
  border-color: var(--primary-color);
}

.nav-direction {
  display: flex;
  align-items: center;
  font-size: 14px;
  color: var(--light-text-color);
  margin-bottom: 8px;
  font-weight: 500;
}

.prev-article .nav-direction {
  justify-content: flex-start;
}

.next-article .nav-direction {
  justify-content: flex-end;
}

.nav-direction i {
  font-size: 12px;
}

.prev-article .nav-direction i {
  margin-right: 6px;
}

.next-article .nav-direction i {
  margin-left: 6px;
}

.nav-title {
  font-size: 15px;
  line-height: 1.4;
  color: var(--text-color);
  font-weight: 400;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.next-article .nav-title {
  text-align: right;
}

.next-article .not-allow:hover {
  cursor: not-allowed;
  border-color: var(--text-secondary);
}

.next-article .not-allow:hover .nav-title {
  color: var(--text-secondary);
}

.next-article .not-allow:hover .nav-direction {
  color: var(--text-secondary);
}

.nav-link:hover .nav-title {
  color: var(--primary-color);
}

.nav-link:hover .nav-direction {
  color: var(--primary-color);
}