/* Daily Digest - Mobile-First Global Styles */
:root {
  --color-bg: #f8fafc;
  --color-bg-card: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-text-secondary: #94a3b8;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-border: #e2e8f0;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  /* 优先级颜色 */
  --color-priority-high: #f97316;
  --color-priority-medium: #3b82f6;
  --color-priority-low: #94a3b8;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

  /* 安全区域 */
  --safe-area-top: env(safe-area-inset-top);
  --safe-area-bottom: env(safe-area-inset-bottom);

  /* 导航高度 */
  --top-bar-height: 56px;
  --bottom-tabs-height: 64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f172a;
    --color-bg-card: #1e293b;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-text-secondary: #64748b;
    --color-border: #334155;
    --color-priority-high: #fb923c;
    --color-priority-medium: #60a5fa;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100%;
  overflow-x: hidden;
}

/* ==================== 顶部导航栏 ==================== */
.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: calc(var(--top-bar-height) + var(--safe-area-top));
  padding-top: var(--safe-area-top);
  background-color: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-left: 16px;
  padding-right: 16px;
  z-index: 100;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-bar-title {
  font-size: 1.1rem;
  font-weight: 600;
}

.back-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s;
}

.back-btn:hover {
  background-color: var(--color-bg);
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s;
}

.icon-btn:hover {
  background-color: var(--color-bg);
}

/* 日期选择按钮 */
.date-picker-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
}

.date-picker-btn:hover {
  border-color: var(--color-primary);
}

.date-icon {
  font-size: 1.1rem;
}

.date-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.date-arrow {
  color: var(--color-text-muted);
}

/* ==================== 主内容区 ==================== */
.main-content {
  padding-top: calc(var(--top-bar-height) + var(--safe-area-top) + 16px);
  padding-bottom: calc(var(--bottom-tabs-height) + var(--safe-area-bottom) + 16px);
  padding-left: 16px;
  padding-right: 16px;
  max-width: 800px;
  margin: 0 auto;
}

/* ==================== 底部 Tab 导航 ==================== */
.bottom-tabs {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--bottom-tabs-height) + var(--safe-area-bottom));
  padding-bottom: var(--safe-area-bottom);
  background-color: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  display: flex;
  z-index: 100;
}

.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  text-decoration: none;
  color: var(--color-text-muted);
  transition: color 0.2s;
}

.tab-item.active {
  color: var(--color-primary);
}

.tab-item.disabled {
  opacity: 0.4;
  pointer-events: none;
}

.tab-icon {
  font-size: 1.4rem;
}

.tab-label {
  font-size: 0.7rem;
  font-weight: 500;
}

/* ==================== 卡片 ==================== */
.card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  overflow: hidden;
}

.card-header {
  padding: 16px;
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-header .icon {
  font-size: 1.2rem;
}

.card-body {
  padding: 16px;
}

/* ==================== 洞察卡片（今日核心洞察） ==================== */
.insight-card {
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  color: white;
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

@media (prefers-color-scheme: dark) {
  .insight-card {
    background: linear-gradient(135deg, #1e40af 0%, #5b21b6 100%);
  }
}

.insight-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-weight: 600;
  font-size: 0.9rem;
  opacity: 0.9;
}

.insight-content {
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.insight-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.insight-tag {
  background: rgba(255, 255, 255, 0.2);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  backdrop-filter: blur(4px);
}

/* ==================== 信源入口卡片 ==================== */
.source-entry-card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow);
}

.source-entry-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.source-entry-card:active {
  transform: translateY(0);
}

.source-entry-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-right: 16px;
  flex-shrink: 0;
}

.source-entry-info {
  flex: 1;
  min-width: 0;
}

.source-entry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.source-entry-name {
  font-weight: 600;
  font-size: 1rem;
}

.source-entry-arrow {
  color: var(--color-text-muted);
  font-size: 1.5rem;
  margin-left: 8px;
}

.source-entry-stats {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.source-entry-preview {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==================== 群列表项（带优先级） ==================== */
.group-list {
  list-style: none;
}

.group-item {
  display: flex;
  align-items: flex-start;
  padding: 16px;
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: background-color 0.2s;
}

.group-item:last-child {
  border-bottom: none;
}

.group-item:hover {
  background-color: var(--color-bg);
}

.group-priority {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 12px;
  margin-top: 6px;
  flex-shrink: 0;
}

.group-priority.high {
  background-color: var(--color-priority-high);
  box-shadow: 0 0 8px var(--color-priority-high);
}

.group-priority.medium {
  background-color: var(--color-priority-medium);
}

.group-priority.low {
  background-color: var(--color-priority-low);
}

.group-info {
  flex: 1;
  min-width: 0;
}

.group-name {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.group-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.group-preview {
  font-size: 0.85rem;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.group-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.group-badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--color-bg);
  color: var(--color-text-muted);
}

.group-badge.hot {
  background: #fef2f2;
  color: #dc2626;
}

.group-badge.tip {
  background: #fefce8;
  color: #ca8a04;
}

.group-badge.link {
  background: #eff6ff;
  color: #2563eb;
}

@media (prefers-color-scheme: dark) {
  .group-badge.hot {
    background: rgba(220, 38, 38, 0.2);
  }
  .group-badge.tip {
    background: rgba(202, 138, 4, 0.2);
  }
  .group-badge.link {
    background: rgba(37, 99, 235, 0.2);
  }
}

.group-arrow {
  color: var(--color-text-muted);
  font-size: 1.2rem;
  margin-left: 8px;
  align-self: center;
}

/* ==================== 排序控制 ==================== */
.sort-control {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.sort-select {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  color: var(--color-text);
  font-size: 0.85rem;
  cursor: pointer;
}

/* ==================== 详情页 Tab ==================== */
.detail-tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-card);
  margin: -16px -16px 16px -16px;
  padding: 0 16px;
  position: sticky;
  top: calc(var(--top-bar-height) + var(--safe-area-top));
  z-index: 50;
}

.detail-tab {
  flex: 1;
  padding: 12px 16px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.detail-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 500;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ==================== 详情页统计 ==================== */
.detail-stats {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 16px;
}

.detail-stat {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==================== 摘要区块 ==================== */
.summary-block {
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

@media (prefers-color-scheme: dark) {
  .summary-block {
    background: linear-gradient(135deg, #1e3a5f 0%, #1e293b 100%);
  }
}

.summary-text {
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.summary-section {
  margin-top: 16px;
}

.summary-section h4 {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.summary-section ul {
  list-style: none;
  font-size: 0.9rem;
}

.summary-section li {
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.summary-section li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

/* ==================== 话题标签 ==================== */
.topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.topic-tag {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  min-width: 80px;
}

.topic-tag-name {
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 2px;
}

.topic-tag-count {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ==================== 消息列表 ==================== */
.message-list {
  list-style: none;
}

.message-item {
  padding: 16px;
  border-bottom: 1px solid var(--color-border);
}

.message-item:last-child {
  border-bottom: none;
}

.message-item.highlight {
  background: linear-gradient(90deg, transparent 0%, #fef3c7 10%, #fef3c7 90%, transparent 100%);
}

@media (prefers-color-scheme: dark) {
  .message-item.highlight {
    background: linear-gradient(90deg, transparent 0%, rgba(251, 191, 36, 0.1) 10%, rgba(251, 191, 36, 0.1) 90%, transparent 100%);
  }
}

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

.message-time {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.message-author {
  font-weight: 500;
  font-size: 0.9rem;
}

.message-content {
  font-size: 0.9rem;
  line-height: 1.7;
  word-break: break-word;
}

.message-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.message-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--color-primary);
  text-decoration: none;
}

.message-badges {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--color-bg);
  color: var(--color-text-muted);
}

/* ==================== 统计网格 ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat-item {
  text-align: center;
  padding: 8px;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ==================== 模态框 ==================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--color-bg-card);
  border-radius: var(--radius) var(--radius) 0 0;
  width: 100%;
  max-width: 400px;
  max-height: 80vh;
  transform: translateY(100%);
  transition: transform 0.3s;
  overflow: hidden;
}

.modal-overlay.open .modal-content {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.modal-actions {
  display: flex;
  gap: 12px;
  padding: 16px 20px;
  border-top: 1px solid var(--color-border);
}

.btn {
  flex: 1;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

/* ==================== 日历 ==================== */
.calendar-container {
  padding: 16px 20px;
}

.calendar-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.cal-nav-btn {
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cal-nav-btn:hover {
  background: var(--color-bg);
}

.cal-month-year {
  font-weight: 600;
  font-size: 1rem;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.cal-header {
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding: 8px 0;
}

.cal-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  border-radius: 50%;
  cursor: pointer;
  position: relative;
  transition: all 0.2s;
}

.cal-day:not(.empty):hover {
  background: var(--color-bg);
}

.cal-day.empty {
  cursor: default;
}

.cal-day.today {
  font-weight: 600;
  color: var(--color-primary);
}

.cal-day.selected {
  background: var(--color-primary);
  color: white;
}

.cal-day.has-data::after {
  content: '';
  position: absolute;
  bottom: 4px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-primary);
}

.cal-day.selected.has-data::after {
  background: white;
}

/* ==================== 空状态 ==================== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

/* ==================== 密码保护 ==================== */
.password-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.password-form {
  background: var(--color-bg-card);
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 320px;
  text-align: center;
}

.password-form h2 {
  font-size: 1.1rem;
  margin-bottom: 24px;
}

.password-form input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  margin-bottom: 16px;
  background: var(--color-bg);
  color: var(--color-text);
}

.password-form button {
  width: 100%;
  padding: 12px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.password-form button:hover {
  background: var(--color-primary-hover);
}

.password-error {
  color: #ef4444;
  font-size: 0.85rem;
  margin-top: 12px;
}

/* ==================== 旧样式兼容 ==================== */
.source-list {
  list-style: none;
}

.source-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: background-color 0.2s;
}

.source-item:last-child {
  border-bottom: none;
}

.source-item:hover {
  background-color: var(--color-bg);
}

.source-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 12px;
  font-size: 1.1rem;
}

.source-info {
  flex: 1;
}

.source-name {
  font-weight: 500;
}

.source-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.source-arrow {
  color: var(--color-text-muted);
  font-size: 1.2rem;
}

.target-list {
  list-style: none;
}

.target-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: background-color 0.2s;
}

.target-item:last-child {
  border-bottom: none;
}

.target-item:hover {
  background-color: var(--color-bg);
}

.target-name {
  font-weight: 500;
}

.target-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.target-summary {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 4px;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.target-arrow {
  color: var(--color-text-muted);
  font-size: 1.2rem;
}

.date-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  margin-bottom: 8px;
}

.date-nav a {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.9rem;
}

.date-nav .current {
  font-weight: 600;
}

.history-list {
  list-style: none;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: background-color 0.2s;
}

.history-item:last-child {
  border-bottom: none;
}

.history-item:hover {
  background-color: var(--color-bg);
}

.history-date {
  font-weight: 500;
}

.history-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.history-sources {
  display: flex;
  gap: 4px;
  margin-top: 4px;
}

.source-badge {
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--color-bg);
}

/* 旧摘要样式 */
.summary {
  padding: 16px;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

@media (prefers-color-scheme: dark) {
  .summary {
    background: linear-gradient(135deg, #1e3a5f 0%, #1e293b 100%);
  }
}

/* ==================== 日期导航栏 ==================== */
.date-nav-bar {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  text-decoration: none;
  transition: all 0.2s;
}

.nav-arrow:hover:not(.disabled) {
  background: var(--color-bg);
}

.nav-arrow.disabled {
  opacity: 0.3;
  pointer-events: none;
}

/* 紧凑版日期导航（用于子页面顶栏） */
.date-nav-compact {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: 8px;
}

.nav-arrow-sm {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  color: var(--color-text);
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 300;
  transition: all 0.2s;
}

.nav-arrow-sm:hover:not(.disabled) {
  background: var(--color-bg);
}

.nav-arrow-sm.disabled {
  opacity: 0.3;
  pointer-events: none;
}

.date-compact {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  min-width: 50px;
  text-align: center;
}

/* ==================== PC 端侧边栏 ==================== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  background: var(--color-bg-card);
  border-right: 1px solid var(--color-border);
  display: none;
  flex-direction: column;
  z-index: 90;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-nav {
  padding: 16px 12px;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-section-title {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 8px 12px 4px;
  margin-top: 8px;
}

.sidebar-section-title:first-child {
  margin-top: 0;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  text-decoration: none;
  transition: all 0.2s;
  margin-bottom: 2px;
}

.sidebar-item:hover {
  background: var(--color-bg);
}

.sidebar-item.active {
  background: var(--color-primary);
  color: white;
}

.sidebar-item.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.sidebar-icon {
  font-size: 1.1rem;
}

.sidebar-item-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-item-meta {
  font-size: 0.7rem;
  opacity: 0.7;
}

.sidebar-dates {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.sidebar-date-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-date {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.sidebar-date:hover {
  background: var(--color-bg);
}

.sidebar-date.active {
  background: var(--color-primary);
  color: white;
}

/* ==================== 导出/分享按钮 ==================== */
.action-buttons {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  color: var(--color-text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.action-btn:hover {
  background: var(--color-bg);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.action-btn-icon {
  font-size: 1rem;
}

/* ==================== 增强版洞察卡片 ==================== */
.insight-stats {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.insight-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.insight-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.insight-stat-label {
  font-size: 0.75rem;
  opacity: 0.8;
}

.insight-topics {
  margin-top: 12px;
}

.insight-topic-title {
  font-size: 0.8rem;
  opacity: 0.8;
  margin-bottom: 8px;
}

.insight-topic-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.insight-topic-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.9rem;
  line-height: 1.5;
}

.insight-topic-icon {
  flex-shrink: 0;
}

/* ==================== 结构化摘要 ==================== */
.structured-summary {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 16px;
}

.summary-item {
  padding: 16px;
  border-bottom: 1px solid var(--color-border);
}

.summary-item:last-child {
  border-bottom: none;
}

.summary-item-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.summary-item-icon {
  font-size: 1rem;
}

.summary-item-content {
  font-size: 0.95rem;
  line-height: 1.7;
}

.summary-item-list {
  list-style: none;
  font-size: 0.9rem;
}

.summary-item-list li {
  padding: 6px 0;
  padding-left: 16px;
  position: relative;
}

.summary-item-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

/* ==================== 桌面端适配 ==================== */
@media (min-width: 768px) {
  .bottom-tabs {
    display: none;
  }

  .sidebar {
    display: flex;
  }

  .top-bar {
    left: 260px;
  }

  .main-content {
    margin-left: 260px;
    padding-bottom: 32px;
  }

  .modal-content {
    border-radius: var(--radius);
    margin-bottom: 20vh;
  }

  .modal-overlay {
    align-items: center;
  }
}

/* ==================== 小屏幕优化 ==================== */
@media (max-width: 380px) {
  .stats-grid {
    gap: 8px;
  }

  .stat-value {
    font-size: 1.25rem;
  }

  .main-content {
    padding-left: 12px;
    padding-right: 12px;
  }

  .insight-card {
    padding: 16px;
  }
}