/* =============================================================
   文章详情页 (art.html)
   复用 style.css 的 .list-layout / .list-side / .breadcrumb
   只新增 .article-panel 相关样式
   ============================================================= */

/* 主容器：用 article-panel 代替 list.html 里的 main-panel + news-list */
.article-panel {
  border: 1px solid var(--color-border-dark);
  background: #fff;
  padding: 0 36px 32px;
}

/* 面包屑与 list.html 保持一致，这里只做必要的微调 */
.article-panel .breadcrumb {
  margin: 0 -36px 28px;
  padding: 14px 36px;
  border-bottom: 1px solid var(--color-border);
  background: #f7f9fc;
}

/* 文章头部：标题 + meta 信息 */
.article-header {
  padding: 28px 0 22px;
  text-align: center;
  border-bottom: 1px dashed #dbe2eb;
  margin-bottom: 28px;
}

.article-title {
  font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
  font-size: 30px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.45;
  letter-spacing: 0.5px;
  margin: 0 0 18px;
}

.article-meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px 26px;
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

/* 正文 */
.article-body {
  font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
  color: #444;
  font-size: 16px;
  line-height: 2;
  text-align: justify;
}

.article-body p {
  margin: 0 0 18px;
  text-indent: 2em;
}

.article-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 28px 0 14px;
  padding-left: 14px;
  border-left: 3px solid var(--color-primary-light);
  line-height: 1.5;
}

/* 上下篇导航 */
.article-nav {
  margin-top: 40px;
  border-top: 1px solid var(--color-border);
  padding-top: 18px;
}

.article-nav__item {
  display: flex;
  gap: 10px;
  padding: 12px 0;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  transition: color 0.2s;
  border-bottom: 1px dashed #eef1f5;
}

.article-nav__item:last-child { border-bottom: none; }

.article-nav__item:hover { color: var(--color-primary-light); }

.article-nav__label {
  color: var(--color-text-secondary);
  flex-shrink: 0;
  font-weight: 600;
}

.article-nav__title {
  flex: 1;
  color: inherit;
}

/* ==================== 响应式 ==================== */

/* 平板 (≤991px) */
@media (max-width: 991px) {
  .article-panel { padding: 0 24px 24px; }
  .article-panel .breadcrumb { margin: 0 -24px 22px; padding: 12px 24px; }
  .article-title { font-size: 26px; }
  .article-body { font-size: 15px; line-height: 1.95; }
}

/* 手机 (≤600px) */
@media (max-width: 600px) {
  .article-panel { padding: 0 16px 20px; }
  .article-panel .breadcrumb { margin: 0 -16px 18px; padding: 10px 16px; font-size: 13px; }

  .article-header { padding: 20px 0 16px; margin-bottom: 20px; }
  .article-title { font-size: 22px; line-height: 1.5; }
  .article-meta { gap: 4px 14px; font-size: 12px; }

  .article-body { font-size: 15px; line-height: 1.95; }
  .article-body p { margin-bottom: 14px; }
  .article-body h3 { font-size: 17px; margin: 22px 0 10px; }

  .article-nav { margin-top: 28px; padding-top: 14px; }
  .article-nav__item { font-size: 13px; padding: 10px 0; }
}