/* ===== 主布局 ===== */
.article-main { padding: 40px 0 80px; }

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.breadcrumb a { color: var(--text-secondary); transition: color .2s; }
.breadcrumb a:hover { color: var(--blue); }

/* ===== 文章头部 ===== */
.article-header { margin-bottom: 28px; }

.article-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.article-title {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.article-meta-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.article-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.author-avatar {
  width: 36px;
  height: 36px;
  background: var(--text);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--bg);
  flex-shrink: 0;
}

.author-info { display: flex; flex-direction: column; }
.author-name { font-size: 14px; font-weight: 600; }
.author-desc { font-size: 12px; color: var(--text-secondary); }

.meta-dot { color: var(--border); }
.article-date { font-size: 13px; color: var(--text-secondary); }
.article-read-time { font-size: 13px; color: var(--text-secondary); }

.article-actions { display: flex; gap: 8px; }

.action-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background .2s, border-color .2s;
  font-family: inherit;
  color: var(--text-secondary);
}
.action-btn:hover { background: var(--bg); border-color: var(--text); color: var(--text); }
.action-btn.saved { background: var(--text); color: var(--bg); border-color: var(--text); }

/* ===== 摘要 ===== */
.article-summary {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-left: 3px solid var(--text);
  padding: 20px 24px;
  margin-bottom: 32px;
}

.summary-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.summary-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.summary-list li {
  font-size: 14px;
  color: var(--text);
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}
.summary-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--text-secondary);
  font-size: 12px;
}

/* ===== 文章内容 ===== */
.article-content {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
  margin-bottom: 32px;
}

.article-content p { margin-bottom: 20px; }

.article-content h2 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.5px;
  margin: 36px 0 16px;
  color: var(--text);
}

.article-content strong { font-weight: 700; }

.article-content blockquote {
  border-left: 3px solid var(--text);
  background: var(--bg-secondary);
  padding: 16px 20px;
  margin: 24px 0;
  font-style: italic;
  color: var(--text-secondary);
  font-size: 15px;
}

.article-divider {
  height: 1px;
  background: var(--border);
  margin: 32px 0;
}

.article-source {
  font-size: 13px !important;
  color: var(--text-secondary) !important;
  margin-bottom: 0 !important;
}

/* ===== 文章标签 ===== */
.article-footer-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.article-footer-tags .tag {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 100px;
  display: inline-block;
}

/* ===== 相关推荐 ===== */
.related-section { margin-top: 8px; }

.related-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -.5px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-card {
  display: block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color .2s, transform .2s;
  color: inherit;
}
.related-card:hover { border-color: var(--text-secondary); transform: translateY(-2px); }

.related-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  padding: 2px 8px;
  border-radius: 100px;
  border: 1px solid var(--border);
  display: inline-block;
  margin-bottom: 10px;
}

.related-card h3 {
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
}

.related-meta { font-size: 12px; color: var(--text-secondary); }

/* ===== 侧边栏 ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 84px;
}

/* 目录 */
.toc { display: flex; flex-direction: column; gap: 4px; }
.toc-item {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 7px 12px;
  border-radius: 8px;
  border-left: 2px solid transparent;
  transition: all .2s;
  line-height: 1.5;
}
.toc-item:hover { color: var(--text); background: var(--bg-secondary); border-left-color: var(--text); }
.toc-item--active { color: var(--text); background: var(--bg-secondary); border-left-color: var(--text); font-weight: 600; }

/* 订阅引导 */
.sidebar-subscribe { text-align: center; background: linear-gradient(135deg, #EFF6FF, #F5F3FF); border-color: #DBEAFE; }
.subscribe-icon { font-size: 32px; margin-bottom: 12px; }
.sidebar-subscribe h3 { font-size: 16px; font-weight: 800; margin-bottom: 8px; }
.sidebar-subscribe p { font-size: 13px; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.6; }
.subscribe-price { font-size: 36px; font-weight: 900; color: var(--blue); letter-spacing: -1px; margin-bottom: 12px; }
.subscribe-price span { font-size: 14px; font-weight: 500; color: var(--text-secondary); }
.subscribe-tip { font-size: 12px; color: var(--text-secondary); margin-top: 10px; }

/* 热门文章 */
.hot-list { display: flex; flex-direction: column; gap: 4px; }
.hot-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 6px;
  border-radius: 8px;
  transition: background .2s;
  color: inherit;
}
.hot-item:hover { background: var(--bg-secondary); }

.hot-num {
  width: 20px;
  height: 20px;
  border-radius: var(--radius);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  border: 1px solid var(--border);
}
.hot-num--1 { background: var(--text); color: var(--bg); border-color: var(--text); }
.hot-num--2 { background: var(--text-secondary); color: var(--bg); border-color: var(--text-secondary); }
.hot-num--3 { background: var(--bg-secondary); color: var(--text); }

.hot-text { font-size: 13px; line-height: 1.5; }

/* ===== 响应式 ===== */
/* 移动端保持与桌面端相同布局 */

/* ===== 教程：代码块 + 一键复制 ===== */
.article-content pre,
.code-block-wrap pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  overflow-x: auto;
  margin: 20px 0;
  font-size: 13px;
  line-height: 1.65;
}

.article-content code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  font-size: 13px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: var(--radius);
}

.article-content pre code {
  background: transparent;
  border: none;
  padding: 0;
  font-size: inherit;
}

/* 代码块包裹容器（注入后）*/
.code-block-wrap {
  position: relative;
  margin: 20px 0;
}
.code-block-wrap pre {
  margin: 0;
  padding-right: 64px; /* 留出复制按钮空间 */
}

/* 复制按钮 */
.code-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
  font-family: inherit;
  padding: 3px 10px;
  cursor: pointer;
  transition: all .15s;
  border-radius: var(--radius);
  line-height: 1.5;
}
.code-copy-btn:hover { background: var(--text); color: var(--bg); border-color: var(--text); }
.code-copy-btn.copied { background: var(--text); color: var(--bg); border-color: var(--text); }

/* 难度徽章 */
.difficulty-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
}
.difficulty-badge.tag--easy { background: #F0FDF4; color: #15803D; border-color: #86EFAC; }
.difficulty-badge.tag--medium { background: #FFFBEB; color: #B45309; border-color: #FCD34D; }
.difficulty-badge.tag--hard { background: #FFF1F2; color: #BE123C; border-color: #FCA5A5; }

/* 暗色模式适配 */
[data-theme="dark"] .difficulty-badge.tag--easy { background: #052e16; color: #4ade80; border-color: #166534; }
[data-theme="dark"] .difficulty-badge.tag--medium { background: #1c1400; color: #fbbf24; border-color: #92400e; }
[data-theme="dark"] .difficulty-badge.tag--hard { background: #1f0a0a; color: #f87171; border-color: #7f1d1d; }