/* ============================================================
   AI 专题页面样式
   ============================================================ */

/* 专题页 Hero */
.ai-hero {
  text-align: center;
  padding: 48px 24px 40px;
  max-width: 800px;
  margin: 0 auto;
}

.ai-hero-icon {
  font-size: 56px;
  margin-bottom: 16px;
  display: block;
}

.ai-hero-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  background: linear-gradient(135deg, #6366f1, #8b5cf6, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.ai-hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto;
}

/* 专题卡片导航 */
.ai-topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.ai-topic-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.ai-topic-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #6366f1, #8b5cf6, #ec4899);
  opacity: 0;
  transition: opacity var(--transition);
}

.ai-topic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary);
}

.ai-topic-card:hover::before {
  opacity: 1;
}

.ai-topic-icon {
  font-size: 36px;
  line-height: 1;
}

.ai-topic-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.ai-topic-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.ai-topic-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

.ai-topic-tools {
  display: flex;
  gap: 6px;
}

.ai-topic-tool-badge {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-weight: 500;
}

.ai-topic-tool-badge--brand {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.ai-topic-badge-icon {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  flex-shrink: 0;
  max-width: none;
  object-fit: contain;
}

.ai-topic-arrow {
  font-size: 14px;
  color: var(--text-muted);
  transition: transform var(--transition), color var(--transition);
}

.ai-topic-card:hover .ai-topic-arrow {
  transform: translateX(4px);
  color: var(--color-primary);
}

/* ==================== 横评对比页 ==================== */
.compare-section {
  margin-bottom: 40px;
}

.compare-section-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.compare-section-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* 维度卡片 */
.compare-dimension {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-card);
}

.compare-dimension-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.compare-dimension-icon {
  font-size: 24px;
}

.compare-dimension-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.compare-dimension-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-left: auto;
}

/* 评分条 */
.compare-scores {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.compare-score-row {
  display: grid;
  grid-template-columns: 120px 1fr 40px;
  align-items: center;
  gap: 12px;
}

.compare-score-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  /* 避免在 grid 窄列中与全局 img{max-width:100%} 形成循环尺寸，导致子项宽度塌成 0 */
  min-width: 0;
}

.compare-score-name .tool-emoji {
  font-size: 16px;
}

/* 品牌 Favicon 图标 */
.tool-favicon {
  width: 18px;
  height: 18px;
  border-radius: 3px;
  vertical-align: middle;
  flex-shrink: 0;
  max-width: none;
  object-fit: contain;
}

.tool-favicon-sm {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  vertical-align: middle;
  flex-shrink: 0;
  max-width: none;
  object-fit: contain;
}

.tool-favicon-xs {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  vertical-align: middle;
  flex-shrink: 0;
  max-width: none;
  object-fit: contain;
}

.compare-score-bar-bg {
  height: 8px;
  background: var(--bg-tag);
  border-radius: 4px;
  overflow: hidden;
}

.compare-score-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 0;
}

.compare-score-value {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* 维度结论 */
.compare-dimension-verdict {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  padding: 12px 16px;
  background: var(--bg-page);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
}

/* 总结卡片 */
.compare-summary {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(139, 92, 246, 0.08));
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-top: 32px;
}

[data-theme="dark"] .compare-summary {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.12));
  border-color: rgba(99, 102, 241, 0.3);
}

.compare-summary-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.compare-summary-text {
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.7;
  font-weight: 500;
}

.compare-updated {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
}

/* ==================== 场景工作流页 ==================== */
.workflow-section {
  margin-bottom: 40px;
}

.workflow-step {
  display: flex;
  gap: 20px;
  position: relative;
  margin-bottom: 0;
}

.workflow-step-line {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 40px;
}

.workflow-step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #8b5cf6);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.workflow-step-connector {
  width: 2px;
  flex: 1;
  background: var(--border-color);
  min-height: 20px;
}

.workflow-step:last-child .workflow-step-connector {
  display: none;
}

.workflow-step-content {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.workflow-step-content:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card-hover);
}

.workflow-step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.workflow-step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.workflow-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.workflow-tool-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background var(--transition);
}

.workflow-tool-tag:hover {
  background: var(--color-primary);
  color: white;
}

.workflow-tips {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.workflow-tip {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  padding-left: 18px;
  position: relative;
}

.workflow-tip::before {
  content: "💡";
  position: absolute;
  left: 0;
  top: 0;
  font-size: 12px;
}

/* Prompt 卡片 */
.workflow-prompt {
  background: #1e1e1e;
  border-radius: var(--radius-md);
  padding: 16px;
  margin-top: 4px;
}

[data-theme="dark"] .workflow-prompt {
  background: #0d1117;
}

.workflow-prompt-label {
  font-size: 11px;
  font-weight: 600;
  color: #8b949e;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.workflow-prompt-text {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: #d4d4d4;
  white-space: pre-wrap;
  word-break: break-all;
}

.workflow-prompt-copy {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  padding: 5px 12px;
  font-size: 12px;
  color: #d4d4d4;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.workflow-prompt-copy:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.workflow-prompt-copy.copied {
  color: #4ade80;
  border-color: #4ade80;
}

/* ==================== 通用区块 ==================== */
.ai-page-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.ai-page-nav a,
.ai-page-nav span {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.ai-page-nav a:hover {
  color: var(--color-primary);
}

.ai-page-nav .separator {
  color: var(--border-color);
}

.ai-page-nav .current {
  color: var(--text-primary);
  font-weight: 500;
}

/* 快速跳转标签 */
.ai-quick-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.ai-quick-nav-btn {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  font-family: var(--font-sans);
}

.ai-quick-nav-btn:hover,
.ai-quick-nav-btn.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

/* ==================== 场景速查卡片 ==================== */
.ai-lookup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.ai-lookup-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.ai-lookup-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card-hover);
}

.ai-lookup-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.ai-lookup-icon {
  font-size: 22px;
}

.ai-lookup-scene {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.ai-lookup-best {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.ai-lookup-reason {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 8px;
}

.ai-lookup-free {
  font-size: 11px;
  color: #10b981;
  font-weight: 500;
}

/* ==================== 价格表 ==================== */
.pricing-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-card);
  margin-bottom: 32px;
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.pricing-table th {
  background: var(--bg-tag);
  color: var(--text-secondary);
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pricing-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  vertical-align: top;
}

.pricing-table tbody tr:hover {
  background: var(--bg-tag);
}

.pricing-table tbody tr:last-child td {
  border-bottom: none;
}

.pricing-name {
  font-weight: 600;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.pricing-free {
  color: var(--text-secondary);
  max-width: 200px;
}

.pricing-paid {
  color: var(--text-secondary);
  max-width: 220px;
}

.pricing-highlight {
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

/* ==================== Prompt 模板库 ==================== */
.prompt-tips-section {
  margin-bottom: 32px;
}

.prompt-formula-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.prompt-formula-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.prompt-formula-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.prompt-formula-content {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.formula-part {
  padding: 4px 12px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
}

.formula-plus {
  color: var(--text-muted);
  font-weight: 700;
}

.prompt-formula-example {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
  padding: 10px 14px;
  background: var(--bg-page);
  border-radius: var(--radius-md);
}

.prompt-formula-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.prompt-formula-item {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.prompt-category-section {
  margin-bottom: 36px;
}

.prompt-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.prompt-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.prompt-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card-hover);
}

.prompt-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.prompt-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.prompt-card-tools {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.prompt-tool-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  padding: 2px 8px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-weight: 500;
  white-space: nowrap;
}

.prompt-card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 14px;
}

.prompt-card-template {
  background: #1e1e1e;
  border-radius: var(--radius-md);
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: #d4d4d4;
  white-space: pre-wrap;
  word-break: break-all;
  flex: 1;
}

[data-theme="dark"] .prompt-card-template {
  background: #0d1117;
}

/* ==================== 新手入门 ==================== */
.beginner-section {
  margin-bottom: 36px;
}

.beginner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.beginner-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition);
}

.beginner-card:hover {
  border-color: var(--color-primary);
}

.beginner-card-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.beginner-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.beginner-card-content {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.beginner-card-key {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 10px 14px;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  line-height: 1.5;
}

.beginner-step {
  display: flex;
  gap: 20px;
  margin-bottom: 16px;
}

.beginner-step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.beginner-step-content {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.beginner-step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.beginner-step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.beginner-step-action {
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 500;
  padding: 10px 14px;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  line-height: 1.5;
}

.mistake-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mistake-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  flex-wrap: wrap;
}

.mistake-wrong {
  font-size: 14px;
  color: #ef4444;
  font-weight: 500;
  flex: 1;
  min-width: 200px;
}

.mistake-arrow {
  font-size: 18px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.mistake-right {
  font-size: 14px;
  color: #10b981;
  font-weight: 500;
  flex: 1;
  min-width: 200px;
}

/* 学习路径卡片 */
.path-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.path-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.path-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card-hover);
}

.path-card-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.path-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.path-card-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.path-step {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.path-card-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: opacity var(--transition);
}

.path-card-link:hover {
  opacity: 0.8;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  .ai-hero {
    padding: 32px 16px 28px;
  }

  .ai-hero-icon {
    font-size: 40px;
  }

  .ai-topic-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .ai-topic-card {
    padding: 20px;
  }

  .compare-score-row {
    grid-template-columns: 80px 1fr 36px;
    gap: 8px;
  }

  .compare-dimension-desc {
    display: none;
  }

  .workflow-step {
    gap: 12px;
  }

  .workflow-step-content {
    padding: 18px;
  }

  .workflow-prompt {
    padding: 12px;
  }

  .compare-summary {
    padding: 20px;
  }

  .ai-lookup-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .prompt-formula-grid {
    grid-template-columns: 1fr;
  }

  .prompt-grid {
    grid-template-columns: 1fr;
  }

  .beginner-grid {
    grid-template-columns: 1fr;
  }

  .path-grid {
    grid-template-columns: 1fr;
  }

  .mistake-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .mistake-wrong,
  .mistake-right {
    min-width: auto;
  }

  .mistake-arrow {
    transform: rotate(90deg);
  }

  .pricing-table th,
  .pricing-table td {
    padding: 10px 12px;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .compare-score-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .compare-score-name {
    font-size: 12px;
  }

  .compare-score-value {
    text-align: left;
  }

  .ai-lookup-grid {
    grid-template-columns: 1fr;
  }

  .beginner-step {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .ai-learn-path-track {
    flex-direction: column;
  }

  .ai-learn-step {
    min-width: auto;
    width: 100%;
  }
}

/* ==================== 专题首页：学习路径时间线 ==================== */
.ai-learn-path-section {
  margin-bottom: 28px;
}

.ai-learn-path-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.ai-learn-path-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.ai-learn-path-track {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: stretch;
}

.ai-learn-step {
  flex: 1 1 140px;
  min-width: 140px;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ai-learn-step:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card-hover);
}

.ai-learn-step-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.ai-learn-step-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.ai-learn-step-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.ai-learn-step-hint {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: auto;
}

/* 首页：术语折叠预览 */
.ai-glossary-preview {
  margin-bottom: 28px;
  padding: 0 4px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
}

.ai-glossary-preview > summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  padding: 14px 16px;
  color: var(--text-primary);
  list-style: none;
}

.ai-glossary-preview > summary::-webkit-details-marker {
  display: none;
}

.ai-glossary-preview[open] > summary {
  border-bottom: 1px solid var(--border-color);
}

.ai-glossary-preview-body {
  padding: 12px 16px 0;
}

.ai-glossary-preview-row {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 10px;
}

.ai-glossary-preview-row strong {
  color: var(--text-primary);
  margin-right: 6px;
}

.ai-glossary-preview-more {
  padding: 0 16px 14px;
  font-size: 13px;
  margin: 0;
}

.ai-glossary-preview-more a {
  color: var(--color-primary);
  font-weight: 500;
}

/* 术语页 */
.glossary-principle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}

.glossary-principle-card {
  padding: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.glossary-principle-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.glossary-principle-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
}

.glossary-accordion {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.glossary-item {
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  padding: 0;
}

.glossary-item > summary {
  cursor: pointer;
  list-style: none;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.glossary-item > summary::-webkit-details-marker {
  display: none;
}

.glossary-term {
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
}

.glossary-one-liner {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.glossary-detail {
  padding: 0 14px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid var(--border-color);
  margin-top: 0;
  padding-top: 12px;
}

/* 安全页 */
.safety-intro {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.safety-sections {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.safety-block {
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-primary);
  box-shadow: var(--shadow-card);
}

.safety-block-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.safety-list {
  margin: 0;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.safety-list li {
  margin-bottom: 6px;
}

/* ==================== AI 专题内导航条 ==================== */
.ai-subnav {
  background: var(--bg-tag);
  border-bottom: 1px solid var(--border-color);
}

.ai-subnav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 8px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  align-items: center;
}

.ai-subnav-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: var(--radius-full);
  text-decoration: none;
  white-space: nowrap;
}

.ai-subnav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.ai-subnav-current {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* 首页：近期更新 */
.ai-changelog-section {
  margin-bottom: 28px;
}

.ai-changelog-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.ai-changelog-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ai-changelog-item {
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.ai-changelog-date {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.ai-changelog-head {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.ai-changelog-detail {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 场景速查：内链 */
.ai-lookup-links {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--border-color);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ai-lookup-link {
  font-size: 12px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

.ai-lookup-link:hover {
  background: var(--color-primary);
  color: #fff;
}

/* dev-api 页工具列表 */
.dev-api-tool-list {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--text-secondary);
  line-height: 1.85;
}

.dev-api-tool-list a {
  color: var(--color-primary);
  font-weight: 500;
}