/* 通用现代组件体系 */

/* 1. 锁屏 Overlay */
#lock-screen {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 99999;
  background: rgba(27, 67, 50, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.lock-box {
  background: #FFFFFF;
  border-radius: 24px;
  padding: 38px 30px;
  width: 100%;
  max-width: 360px;
  text-align: center;
  box-shadow: var(--shadow-float);
  animation: popIn 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes popIn {
  from { transform: scale(0.92); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.lock-icon-box {
  width: 58px; height: 58px;
  border-radius: 18px;
  background: var(--primary-bg);
  color: var(--primary-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  margin: 0 auto 16px auto;
}

.lock-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-accent);
  margin-bottom: 6px;
}

.lock-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.password-input {
  width: 100%; height: 50px;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1.3rem;
  text-align: center;
  letter-spacing: 6px;
  outline: none;
  transition: all 0.2s;
  color: var(--text-main);
  margin-bottom: 14px;
  background: #F9FAFB;
}

.password-input:focus {
  border-color: var(--primary-accent);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.12);
}

.btn-unlock {
  width: 100%; height: 48px;
  background: linear-gradient(135deg, var(--primary-accent), var(--primary));
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.98rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(45, 106, 79, 0.25);
  transition: transform 0.1s ease;
  margin-bottom: 14px;
}

.btn-unlock:active { transform: scale(0.98); }

.remember-row {
  display: flex; align-items: center; justify-content: center;
  gap: 6px; font-size: 0.84rem; color: var(--text-muted);
  cursor: pointer; user-select: none;
}

.error-hint {
  color: #EF4444; font-size: 0.84rem; font-weight: 600;
  margin-top: 10px; display: none;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-5px); }
  40%, 80% { transform: translateX(5px); }
}

/* 2. 知识树卡片 */
.tree-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.tree-toolbar {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  background: #F9FAFB; flex-wrap: wrap; gap: 10px;
}

.path-indicator {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--text-muted);
  display: flex; align-items: center; gap: 6px;
}

.search-box { position: relative; width: 240px; }

.search-input {
  width: 100%; padding: 7px 12px 7px 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  background: #FFFFFF;
  outline: none;
  transition: all 0.2s;
}

.search-input:focus {
  border-color: var(--primary-accent);
  box-shadow: 0 0 0 2px rgba(45, 106, 79, 0.12);
}

.search-icon {
  position: absolute; left: 10px; top: 50%;
  transform: translateY(-50%); font-size: 13px; color: var(--text-dim);
}

.tree-body { padding: 18px 20px; }
.tree-branch { margin-bottom: 14px; }
.tree-branch:last-child { margin-bottom: 0; }

.node-root {
  display: flex; align-items: center; justify-content: space-between;
  padding: 11px 16px; border-radius: var(--radius-md);
  font-weight: 700; font-size: 0.94rem; color: var(--text-main);
  cursor: pointer; transition: all 0.15s;
  background: #F8F9FA; border: 1px solid var(--border);
}

.node-root:hover { background: #F0F4F2; border-color: var(--border-hover); }
.node-left { display: flex; align-items: center; gap: 8px; }

.node-tag {
  font-family: var(--font-mono); font-size: 0.75rem;
  padding: 2px 8px; border-radius: 6px; font-weight: 600;
  border: 1px solid transparent;
}

.node-arrow {
  font-size: 11px; color: var(--text-dim);
  transition: transform 0.2s ease; display: inline-block;
}

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

.node-children {
  margin-left: 20px; padding-left: 16px;
  border-left: 2px solid #E5E7EB; margin-top: 8px;
  display: flex; flex-direction: column; gap: 4px;
}

.leaf-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 14px; border-radius: var(--radius-sm);
  font-size: 0.9rem; color: var(--text-main);
  text-decoration: none;
  cursor: pointer; transition: all 0.15s ease;
  border: 1px solid transparent;
}

.leaf-item:hover {
  background: var(--primary-bg);
  color: var(--primary-accent);
  transform: translateX(2px);
}

.leaf-left { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.leaf-icon { font-size: 14px; }
.leaf-desc { font-size: 0.8rem; color: var(--text-muted); }

/* 3. 文章容器与排版 */
.article-container {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
  max-width: 900px;
  margin: 0 auto;
}

.article-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 22px; margin-bottom: 26px;
}

.article-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: var(--radius-pill);
  font-size: 0.8rem; font-weight: 700; margin-bottom: 12px;
}

.article-title {
  font-size: 1.85rem; font-weight: 800; color: var(--primary);
  line-height: 1.3; margin-bottom: 10px;
}

.article-meta {
  display: flex; align-items: center; gap: 12px;
  font-size: 0.84rem; color: var(--text-muted); flex-wrap: wrap;
}

.article-body h2 {
  font-size: 1.3rem; font-weight: 800; color: var(--primary);
  margin-top: 36px; margin-bottom: 14px; padding-bottom: 6px;
  border-bottom: 2px solid var(--primary-bg);
  display: flex; align-items: center; gap: 8px;
}

.article-body h3 {
  font-size: 1.08rem; font-weight: 700; color: var(--primary-accent);
  margin-top: 22px; margin-bottom: 10px;
}

.article-body p {
  font-size: 0.96rem; color: #374151; line-height: 1.75; margin-bottom: 16px;
}

.article-body ul, .article-body ol {
  margin-bottom: 18px; padding-left: 22px;
  font-size: 0.94rem; color: #374151; line-height: 1.75;
}

.article-body li { margin-bottom: 6px; }

/* 4. 对比卡片 */
.comparison-wrapper {
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center; gap: 14px; margin: 20px 0 26px 0;
}

.compare-card {
  background: #FFFFFF; border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}

.compare-traditional { border-top: 4px solid #CBD5E1; background: #F8FAFC; }
.compare-ai { border-top: 4px solid var(--primary-accent); background: #F0FDF4; }

.compare-card-title {
  font-size: 1rem; font-weight: 700; color: var(--primary);
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border);
}

.compare-list {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 8px;
}

.compare-list li {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 0.88rem; line-height: 1.5; margin-bottom: 0; color: #374151;
}

.icon-cross { color: #9CA3AF; font-weight: 800; }
.icon-check { color: var(--primary-accent); font-weight: 800; }

.compare-divider-badge {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--primary-accent); color: #FFFFFF;
  font-size: 12px; font-weight: 800;
  box-shadow: 0 4px 10px rgba(45, 106, 79, 0.25); flex-shrink: 0;
}

/* 5. 步骤流程 Pipeline */
.pipeline-container { display: flex; flex-direction: column; gap: 10px; margin: 20px 0 24px 0; }
.pipeline-step {
  display: flex; gap: 14px; background: #F8F9FA;
  border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 16px 18px;
}

.step-num-badge {
  width: 32px; height: 32px; border-radius: 10px;
  background: var(--primary-accent); color: #FFFFFF;
  font-family: var(--font-mono); font-size: 0.85rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 2px;
}

.step-content { flex: 1; }
.step-heading {
  font-size: 0.96rem; font-weight: 700; color: var(--primary);
  margin-bottom: 4px; display: flex; align-items: center; gap: 8px;
}

.step-tag {
  font-family: var(--font-mono); font-size: 0.72rem;
  padding: 2px 6px; border-radius: 4px;
  background: var(--primary-bg); color: var(--primary-accent); font-weight: 600;
}

.step-desc { font-size: 0.88rem; color: #4B5563; line-height: 1.6; }

/* 6. 现代圆角数据表 */
.table-wrap {
  overflow-x: auto; margin: 20px 0 24px 0;
  border-radius: var(--radius-md); border: 1px solid var(--border);
}

.article-table {
  width: 100%; border-collapse: collapse; font-size: 0.88rem;
  text-align: left; background: #FFFFFF;
}

.article-table th {
  background: #F0FDF4; padding: 12px 16px; font-weight: 700;
  color: var(--primary); border-bottom: 2px solid var(--primary-light);
  white-space: nowrap;
}

.article-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); color: #374151; }
.article-table tr:last-child td { border-bottom: none; }
.article-table tr:hover td { background: #F9FAFB; }

/* 7. Trip 提示卡片 */
.box-truth {
  background: #FEF2F2; border-left: 4px solid #EF4444;
  padding: 12px 16px; border-radius: 4px 10px 10px 4px;
  font-size: 0.88rem; color: #991B1B; margin: 18px 0; line-height: 1.6;
}

.box-elder {
  background: #F0FDF4; border-left: 4px solid #22C55E;
  padding: 12px 16px; border-radius: 4px 10px 10px 4px;
  font-size: 0.88rem; color: #166534; margin: 18px 0; line-height: 1.6;
}

.box-amber {
  background: #FFFBEB; border-left: 4px solid #F59E0B;
  padding: 12px 16px; border-radius: 4px 10px 10px 4px;
  font-size: 0.88rem; color: #92400E; margin: 18px 0; line-height: 1.6;
}

/* 8. 航班与租车卡片 */
.flight-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  padding: 20px 24px; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border); margin-bottom: 22px;
}

.flight-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0;
}
.flight-row:first-child { border-bottom: 1px dashed var(--border); }

.flight-tag {
  font-size: 0.75rem; font-weight: 700; padding: 2px 8px;
  border-radius: 6px; background: var(--primary-bg); color: var(--primary-accent);
}
.flight-tag.return { background: var(--c-books-bg); color: var(--c-books); }
.flight-cities { font-size: 1.02rem; font-weight: 700; color: var(--primary); margin-top: 2px; }
.flight-time { text-align: right; font-size: 0.82rem; color: var(--text-muted); }
.flight-time strong { display: block; font-size: 1.05rem; color: var(--primary-accent); }

/* 9. 旅行子导航 Tabs */
.sub-tab-bar {
  display: flex; background: #E5E9E7; padding: 4px;
  border-radius: var(--radius-md); margin-bottom: 20px;
  gap: 4px; overflow-x: auto;
}
.sub-tab-bar::-webkit-scrollbar { display: none; }

.sub-tab-btn {
  flex: 1; min-width: 80px; border: none; background: transparent;
  padding: 9px 8px; border-radius: 10px; font-size: 0.84rem; font-weight: 700;
  color: var(--text-muted); cursor: pointer; transition: all 0.2s ease;
  text-align: center; white-space: nowrap;
}
.sub-tab-btn.active {
  background: var(--card-bg); color: var(--primary-accent);
  box-shadow: 0 2px 8px rgba(27, 67, 50, 0.08);
}

.trip-subpanel { display: none; animation: fadeIn 0.25s ease-out; }
.trip-subpanel.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 10. 矢量地图组件 */
.map-container-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  padding: 18px 16px; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border); margin-bottom: 20px;
}
.map-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.map-title {
  font-size: 1.05rem; font-weight: 700; color: var(--primary-accent);
  display: flex; align-items: center; gap: 6px;
}
.route-filter-bar { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 12px; }
.route-chip {
  padding: 6px 12px; font-size: 0.78rem; font-weight: 700;
  border-radius: 20px; border: 1px solid var(--border);
  background: #F8F9FA; color: #4B5563; cursor: pointer;
  white-space: nowrap; transition: all 0.2s ease;
}
.route-chip.active {
  background: var(--primary-accent); color: #FFFFFF;
  border-color: var(--primary-accent); box-shadow: 0 2px 6px rgba(45, 106, 79, 0.25);
}

/* 图层控制开关条 */
.layer-control-bar {
  display: flex; gap: 6px; flex-wrap: wrap; align-items: center;
  padding: 8px 12px; background: #F3F7F5; border-radius: 12px;
  margin-bottom: 10px; border: 1px solid #E2EBE6;
}
.layer-control-title {
  font-size: 0.78rem; font-weight: 700; color: var(--primary);
  display: flex; align-items: center; gap: 4px; margin-right: 4px;
}
.layer-toggle-btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 9px; border-radius: 8px; border: 1px solid var(--border);
  background: #FFFFFF; font-size: 0.74rem; font-weight: 600;
  color: #4B5563; cursor: pointer; transition: all 0.2s ease;
  user-select: none;
}
.layer-toggle-btn.active {
  background: var(--primary-bg); color: var(--primary-accent);
  border-color: var(--primary-accent); box-shadow: 0 1px 4px rgba(45, 106, 79, 0.15);
}
.layer-toggle-btn input[type="checkbox"] {
  accent-color: var(--primary-accent); cursor: pointer; margin: 0;
}
.map-layer {
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.map-layer.layer-hidden {
  opacity: 0; pointer-events: none;
}
/* 真实高德地图容器与气泡标注 */
.amap-container-wrapper {
  position: relative; width: 100%; height: 530px;
  border-radius: 14px; border: 1px solid #D1DBD4; overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06); margin-bottom: 12px;
}
#amapLeafletMap { width: 100%; height: 100%; z-index: 1; }
.amap-marker-bubble {
  display: inline-flex; align-items: center; gap: 5px;
  background: #FFFFFF; border: 1.5px solid var(--border);
  border-radius: 20px; padding: 3px 8px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.18);
  cursor: pointer; white-space: nowrap;
  transition: transform 0.18s ease;
}
.amap-marker-bubble:hover { transform: scale(1.12); z-index: 1000; }
.amap-marker-icon { font-size: 0.95rem; line-height: 1; }
.amap-marker-label { font-size: 0.74rem; font-weight: 700; color: #1F2937; }
.amap-marker-bubble.scenic { border-color: #2D6A4F; }
.amap-marker-bubble.food { border-color: #E76F51; background: #FFF9F6; }
.amap-marker-bubble.food .amap-marker-label { color: #9A3412; }
.amap-marker-bubble.hotel { border: 2px solid #0F766E; background: #F0FDFA; font-weight: 800; }
.amap-marker-bubble.hotel .amap-marker-label { color: #0F766E; }
.amap-marker-bubble.airport { border-color: #2563EB; background: #F0F9FF; }
.amap-marker-bubble.airport .amap-marker-label { color: #1D4ED8; }
.leaflet-popup-content-wrapper { border-radius: 12px !important; box-shadow: 0 6px 20px rgba(0,0,0,0.15) !important; padding: 2px !important; }
.leaflet-popup-content { margin: 10px 12px !important; line-height: 1.5 !important; font-size: 0.84rem; }
.amap-route-tooltip {
  background: rgba(27, 67, 50, 0.95) !important;
  color: #FFFFFF !important;
  border: 1px solid rgba(255, 255, 255, 0.2) !important;
  border-radius: 8px !important;
  padding: 6px 12px !important;
  font-size: 0.78rem !important;
  box-shadow: 0 4px 18px rgba(0,0,0,0.3) !important;
}
.leaflet-tooltip-top:before {
  border-top-color: rgba(27, 67, 50, 0.95) !important;
}
.btn-nav-action {
  flex: 1; padding: 8px 12px; border-radius: 10px; font-size: 0.8rem; font-weight: 600;
  text-align: center; cursor: pointer; text-decoration: none; display: inline-flex;
  align-items: center; justify-content: center; gap: 6px; border: 1px solid var(--border);
  background: #F8F9FA; color: var(--text-main); transition: all 0.15s ease;
}
.btn-nav-action:hover { background: #E5E7EB; }
.btn-nav-action.primary {
  background: linear-gradient(135deg, var(--primary-accent), var(--primary));
  color: #FFFFFF; border-color: var(--primary-accent); box-shadow: 0 4px 10px rgba(45, 106, 79, 0.2);
}
.btn-nav-action.primary:hover { background: var(--primary); }

/* 11. 自驾方案卡片 */
.plan-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border);
  margin-bottom: 22px; transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.plan-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.plan-img-wrapper { position: relative; width: 100%; height: 190px; overflow: hidden; background: #E5E7EB; }
.plan-img { width: 100%; height: 100%; object-fit: cover; }
.plan-badge-top {
  position: absolute; top: 12px; left: 12px; background: rgba(27, 67, 50, 0.88);
  color: #FFFFFF; backdrop-filter: blur(6px); padding: 4px 10px; border-radius: 8px;
  font-size: 0.76rem; font-weight: 700;
}
.plan-tag-rec {
  position: absolute; top: 12px; right: 12px; background: var(--accent);
  color: #FFFFFF; padding: 4px 10px; border-radius: 8px; font-size: 0.74rem; font-weight: 700;
}
.plan-body { padding: 18px 20px; }
.plan-title { font-size: 1.25rem; font-weight: 700; color: var(--primary-accent); margin-bottom: 6px; }
.plan-metrics {
  display: flex; gap: 12px; font-size: 0.8rem; color: var(--text-muted);
  margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.spot-list { list-style: none; margin-bottom: 14px; padding: 0; }
.spot-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 10px; font-size: 0.88rem; color: #374151; }
.spot-icon { font-size: 1.1rem; line-height: 1.2; flex-shrink: 0; }
.spot-text strong { color: var(--text-main); display: block; }
.spot-text span { color: var(--text-muted); font-size: 0.82rem; display: block; margin-top: 1px; }

/* 12. 美食与清单 */
.food-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; margin-bottom: 20px; }
.food-card { background: var(--card-bg); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.food-card img { width: 100%; height: 140px; object-fit: cover; background: #E5E7EB; }
.food-card-body { padding: 14px; }
.food-card-title { font-size: 0.98rem; font-weight: 700; color: var(--text-main); margin-bottom: 4px; }
.food-card-desc { font-size: 0.82rem; color: var(--text-muted); line-height: 1.5; }
.food-card-tip { font-size: 0.78rem; color: #D97706; background: #FFFBEB; padding: 4px 8px; border-radius: 6px; margin-top: 8px; display: inline-block; }

.checklist { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.check-item {
  display: flex; align-items: center; gap: 10px; background: #FFFFFF;
  border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px;
  font-size: 0.88rem; color: var(--text-main); cursor: pointer; user-select: none; transition: all 0.15s ease;
}
.check-item:hover { background: #F9FAFB; border-color: var(--primary-accent); }
.check-item input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--primary-accent); }

/* 13. 空状态 */
.subpage-header {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px 24px; margin-bottom: 20px; box-shadow: var(--shadow-sm);
}
.subpage-title { font-size: 1.4rem; font-weight: 800; color: var(--primary); display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.subpage-desc { font-size: 0.88rem; color: var(--text-muted); }
.empty-state-tree { background: var(--card-bg); border: 2px dashed var(--border); border-radius: var(--radius-lg); padding: 50px 20px; text-align: center; }
.empty-icon { font-size: 30px; margin-bottom: 12px; opacity: 0.85; }
.empty-title { font-size: 1.1rem; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.empty-sub { font-size: 0.86rem; color: var(--text-dim); max-width: 400px; margin: 0 auto; line-height: 1.5; }

/* ==============================================================================
   📱 移动端专属极致响应式体验系统 (Mobile First Responsive System)
   ============================================================================== */
@media (max-width: 768px) {
  /* 1. 视口与基础排版：最大化释放手机屏幕阅读面积 */
  body {
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
  }
  main.main-container {
    padding: 10px 8px 60px 8px;
    width: 100%;
    box-sizing: border-box;
  }
  .article-container {
    padding: 18px 12px;
    border-radius: 16px;
    box-sizing: border-box;
  }
  .article-badge {
    font-size: 0.72rem;
    padding: 3px 8px;
  }
  .article-title {
    font-size: 1.32rem !important;
    line-height: 1.35 !important;
    margin: 8px 0 10px 0 !important;
    letter-spacing: -0.2px;
  }
  .article-meta {
    font-size: 0.76rem !important;
    gap: 6px !important;
    line-height: 1.6 !important;
  }

  /* 2. 顶部 Header 与导航横向平滑滚动轨 */
  header.site-header {
    padding: 8px 10px;
    position: sticky;
    top: 0;
    z-index: 1000;
  }
  .header-inner {
    gap: 6px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
  }
  nav.tree-nav {
    display: flex;
    align-items: center;
    gap: 3px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex: 1;
    min-width: 0;
    padding: 3px;
  }
  nav.tree-nav::-webkit-scrollbar { display: none; }
  .nav-btn {
    padding: 5px 9px;
    font-size: 0.75rem;
    flex-shrink: 0;
    white-space: nowrap;
  }
  .btn-share, .btn-lock {
    padding: 5px 8px;
    font-size: 0.74rem;
    flex-shrink: 0;
    white-space: nowrap;
    gap: 3px;
  }

  /* 3. 旅行二级子导航 Tabs */
  .sub-tab-bar {
    padding: 3px;
    gap: 3px;
    margin-bottom: 14px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    border-radius: 12px;
  }
  .sub-tab-bar::-webkit-scrollbar { display: none; }
  .sub-tab-btn {
    padding: 8px 10px;
    font-size: 0.78rem;
    min-width: 74px;
    flex-shrink: 0;
    text-align: center;
  }

  /* 4. 航班与租车专属卡片 */
  .flight-card {
    padding: 14px 12px;
    border-radius: 14px;
    margin-bottom: 16px;
  }
  .flight-row {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
  }
  .flight-cities {
    font-size: 0.94rem;
    font-weight: 700;
  }
  .flight-time {
    text-align: right;
  }
  .flight-time strong {
    font-size: 0.96rem;
  }

  /* 5. 高德在线地图移动端黄金视口与手势优化 */
  .map-container-card {
    padding: 12px 10px;
    border-radius: 14px;
    margin-bottom: 16px;
  }
  .map-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    margin-bottom: 10px;
  }
  .map-title {
    font-size: 0.96rem;
  }
  .layer-control-bar {
    padding: 6px 8px;
    gap: 4px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
    margin-bottom: 8px;
  }
  .layer-control-bar::-webkit-scrollbar { display: none; }
  .layer-control-title {
    font-size: 0.72rem;
    flex-shrink: 0;
  }
  .layer-toggle-btn {
    padding: 3px 8px;
    font-size: 0.72rem;
    flex-shrink: 0;
    white-space: nowrap;
  }
  .route-filter-bar {
    gap: 4px;
    padding-bottom: 4px;
    margin-bottom: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .route-filter-bar::-webkit-scrollbar { display: none; }
  .route-chip {
    padding: 5px 10px;
    font-size: 0.74rem;
    flex-shrink: 0;
  }
  .amap-container-wrapper {
    height: 380px; /* 移动端黄金高度，保证上下留出页面滑动手势区域 */
    border-radius: 12px;
    margin-bottom: 8px;
  }
  .amap-marker-bubble {
    padding: 2px 6px;
    gap: 3px;
  }
  .amap-marker-icon {
    font-size: 0.85rem;
  }
  .amap-marker-label {
    font-size: 0.7rem;
  }

  /* 6. 自驾方案库卡片移动端优化 */
  .plans-quick-nav {
    padding: 10px 8px !important;
    gap: 5px !important;
    overflow-x: auto !important;
    flex-wrap: nowrap !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
    margin-bottom: 14px !important;
  }
  .plans-quick-nav::-webkit-scrollbar { display: none; }
  .plans-quick-nav span { flex-shrink: 0; font-size: 0.74rem !important; }
  .plans-quick-nav .route-chip { flex-shrink: 0; }

  .plan-card {
    border-radius: 14px;
    margin-bottom: 16px;
  }
  .plan-img-wrapper {
    height: 160px;
  }
  .plan-body {
    padding: 14px 12px;
  }
  .plan-title {
    font-size: 1.08rem;
    margin-bottom: 8px;
    line-height: 1.35;
  }
  .plan-metrics {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    font-size: 0.75rem;
    margin-bottom: 10px;
  }
  .plan-metrics span {
    width: 100%;
    box-sizing: border-box;
    padding: 4px 8px;
    background: #F1F5F9;
    border-radius: 6px;
  }
  .spot-list {
    margin-bottom: 10px;
  }
  .spot-item {
    gap: 8px;
    padding: 8px 0;
  }
  .spot-icon {
    font-size: 1.05rem;
  }
  .spot-text strong {
    font-size: 0.86rem;
  }
  .spot-text span {
    font-size: 0.76rem;
    line-height: 1.45;
  }
  .box-elder, .box-truth {
    padding: 10px 10px;
    font-size: 0.78rem;
    line-height: 1.45;
    border-radius: 10px;
    margin-top: 8px;
  }
  .btn-nav-action {
    padding: 9px 6px;
    font-size: 0.76rem;
    min-height: 40px; /* 符合苹果 iOS 触控标准 */
  }

  /* 7. 树状知识目录在手机端排版 */
  .tree-toolbar { flex-direction: column; align-items: stretch; gap: 8px; }
  .search-box { width: 100%; }
  .node-children { margin-left: 8px; padding-left: 8px; }
  .leaf-desc { display: none; }
}

/* =========================================================
   8. 代码折叠展开组件 (Code Collapsible Details)
   ========================================================= */
.code-collapsible {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #FFFFFF;
  margin: 18px 0;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}
.code-collapsible:hover {
  border-color: #CBD5E1;
  box-shadow: var(--shadow-md);
}
.code-collapsible summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: #F8FAFC;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--primary);
  user-select: none;
  list-style: none;
  transition: background 0.15s ease;
}
.code-collapsible summary::-webkit-details-marker {
  display: none;
}
.code-collapsible summary:hover {
  background: #F1F5F9;
  color: var(--c-stock, #16A34A);
}
.code-collapsible .summary-left {
  display: flex;
  align-items: center;
  gap: 8px;
}
.code-collapsible .summary-arrow {
  display: inline-block;
  font-size: 0.72rem;
  transition: transform 0.2s ease;
  color: var(--text-dim);
}
.code-collapsible[open] .summary-arrow {
  transform: rotate(90deg);
  color: var(--c-stock, #16A34A);
}
.code-collapsible .summary-tag {
  font-size: 0.74rem;
  font-family: var(--font-mono);
  padding: 2px 8px;
  border-radius: 12px;
  background: #EFF6FF;
  color: #1D4ED8;
  border: 1px solid #DBEAFE;
}
.code-collapsible pre[class*="language-"] {
  margin: 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  border-top: 1px solid var(--border) !important;
}