/* ===== Blog 文章页共享样式：封面 / TOC / 作者 / 分享 / 相关文章 / 导航 / 进度条 ===== */

/* --- 文章封面横幅 --- */
.article-cover {
  margin: 0 0 32px;
  padding: 48px 24px 36px;
  border-radius: 0;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.article-cover::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.18), transparent 50%);
}
.article-cover-inner { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; }
.article-cover-cat {
  display: inline-block; padding: 4px 14px; background: rgba(255,255,255,0.22);
  backdrop-filter: blur(4px); border-radius: 14px; font-size: 0.82rem; font-weight: 600; margin-bottom: 16px;
}
.article-cover-title {
  font-size: 1.8rem; font-weight: 800; line-height: 1.35; margin: 0 0 18px; color: #fff;
}
.article-cover-meta { border-bottom: none !important; padding-bottom: 0 !important; margin-bottom: 0 !important; }
.article-cover-meta span { color: rgba(255,255,255,0.92) !important; }
.article-cover-meta svg { color: rgba(255,255,255,0.92) !important; }

/* --- TOC 目录 --- */
.toc-box {
  background: var(--bg2);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 32px;
}
.toc-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}
.toc-list { list-style: none; margin: 0; padding: 0; }
.toc-item { margin-bottom: 8px; line-height: 1.6; }
.toc-h3 { padding-left: 18px; }
.toc-item a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s;
  display: block;
  padding-left: 13px;
}
.toc-item a:hover { color: var(--accent); }
.toc-item a.active {
  color: var(--accent);
  font-weight: 600;
  border-left: 3px solid var(--accent);
  padding-left: 10px;
  margin-left: -13px;
}

/* --- 阅读进度条 --- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  z-index: 9999;
  width: 0;
}

/* --- 作者署名 --- */
.author-box {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  background: var(--bg2);
  border: 1px solid var(--rule);
  border-radius: 12px;
  margin: 32px 0 24px;
  flex-wrap: wrap;
}
.author-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--white); border: 2px solid var(--accent-200); padding: 4px;
}
.author-info { flex: 1; min-width: 160px; }
.author-name { font-weight: 700; font-size: 1rem; color: var(--ink); }
.author-role { font-size: 0.82rem; color: var(--muted); margin-top: 2px; }
.author-cat {
  padding: 4px 12px; background: var(--accent-50); color: var(--accent);
  border-radius: 16px; font-size: 0.8rem; font-weight: 600;
}
.review-badge {
  padding: 4px 12px; background: #ecfdf5; color: #059669;
  border: 1px solid #a7f3d0; border-radius: 16px; font-size: 0.8rem; font-weight: 600;
}

/* --- 分享按钮 --- */
.share-box {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 20px; background: var(--bg2);
  border: 1px solid var(--rule); border-radius: 12px;
  margin: 0 0 32px; flex-wrap: wrap;
}
.share-label { font-size: 0.9rem; font-weight: 600; color: var(--ink); }
.share-btn {
  padding: 6px 14px; border: 1px solid var(--rule); border-radius: 20px;
  background: var(--white); color: var(--ink); font-size: 0.85rem;
  cursor: pointer; transition: all 0.2s; text-decoration: none;
}
.share-btn:hover { border-color: var(--accent); color: var(--accent); }
.share-tip { font-size: 0.82rem; color: var(--muted); margin-left: 8px; }

/* --- 上一篇/下一篇导航 --- */
.post-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 40px 0;
}
.post-nav-item {
  display: block; padding: 18px 22px; background: var(--bg2);
  border: 1px solid var(--rule); border-radius: 12px;
  text-decoration: none; color: var(--ink); transition: all 0.25s;
}
.post-nav-item:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 6px 16px rgba(43,92,255,0.08); }
.post-nav-item.disabled { opacity: 0.4; pointer-events: none; }
.post-nav-label { font-size: 0.78rem; color: var(--muted); margin-bottom: 6px; display: flex; align-items: center; gap: 6px; }
.post-nav-label svg { width: 14px; height: 14px; }
.post-nav-title { font-size: 0.95rem; font-weight: 600; line-height: 1.5; }
.post-nav-next { text-align: right; }
.post-nav-next .post-nav-label { justify-content: flex-end; }

/* --- 相关文章（由 JS 生成）--- */
#blog-related { padding: 40px 0 60px; background: var(--bg2); }
#blog-related .section-inner { width: 100%; max-width: 820px; margin: 0 auto; padding: 0 24px; box-sizing: border-box; }
#blog-related h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 20px; }
#blog-related .related-list {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
}
#blog-related .related-item {
  display: block; padding: 20px; background: var(--white);
  border: 1px solid var(--rule); border-radius: 10px;
  text-decoration: none; transition: all 0.25s;
}
#blog-related .related-item:hover {
  border-color: var(--accent); transform: translateX(4px);
  box-shadow: 0 6px 16px rgba(43, 92, 255, 0.08);
}
#blog-related .related-cat {
  display: inline-block; padding: 2px 10px; background: var(--accent-50);
  color: var(--accent); border-radius: 12px; font-size: 0.75rem; font-weight: 600; margin-bottom: 10px;
}
#blog-related .related-title {
  font-size: 0.98rem; font-weight: 700; line-height: 1.5;
  margin-bottom: 8px; color: var(--ink);
}
#blog-related .related-excerpt {
  font-size: 0.85rem; color: var(--muted); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
#blog-related .related-item:hover .related-title { color: var(--accent); }

/* --- 文章内容区桌面端宽度约束（居中，最大 820px） --- */
.toc-box,
.article-content,
.author-box,
.share-box,
.post-nav {
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
}
.article-content { padding: 0 24px; }
.back-link {
  display: block;
  max-width: 820px;
  margin: 24px auto 0;
  padding-left: 24px;
  padding-right: 24px;
  box-sizing: border-box;
}

/* --- 响应式 --- */
@media (max-width: 767px) {
  .article-cover { margin: 0 0 28px; padding: 32px 16px 28px; }
  .article-cover-title { font-size: 1.4rem; }
  /* 带背景/边框的模块用外边距留出屏幕边距 */
  .toc-box,
  .author-box,
  .share-box,
  .post-nav {
    margin-left: 16px;
    margin-right: 16px;
  }
  /* 纯文本内容用内边距留出屏幕边距 */
  .article-content { margin: 0; padding: 0 16px; }
  .back-link { margin: 24px 0 0; padding-left: 16px; padding-right: 16px; }
  .article-content table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  #blog-related .section-inner { padding: 0 16px; }
  #blog-related .related-list { grid-template-columns: 1fr; }
  .author-box { padding: 14px; gap: 10px; }
  .author-avatar { width: 40px; height: 40px; }
  .share-box { padding: 12px; }
  .post-nav { grid-template-columns: 1fr; }
}