:root {
  --bg: #f8f7f4;
  --surface: #ffffff;
  --surface-hover: #f4f3ef;
  --border: #e8e6e0;
  --text: #1a1a1a;
  --text-secondary: #6b6b6b;
  --text-tertiary: #9b9b9b;
  --primary: #534ab7;
  --primary-light: #eeedfe;
  --primary-hover: #3c3489;
  --success: #0f6e56;
  --success-light: #e1f5ee;
  --warning: #854f0b;
  --warning-light: #faeeda;
  --danger: #a32d2d;
  --danger-light: #fcebeb;
  --info: #185fa5;
  --info-light: #e6f1fb;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

#app { display: flex; min-height: 100vh; }

.sidebar {
  width: 220px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.brand-logo {
  width: 40px; height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
}

.brand-title { font-size: 15px; font-weight: 600; }
.brand-sub { font-size: 12px; color: var(--text-secondary); }

.nav { flex: 1; padding: 12px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  cursor: pointer;
  margin-bottom: 4px;
  transition: all 0.15s;
  font-size: 14px;
}

.nav-item:hover { background: var(--surface-hover); color: var(--text); }

.nav-item.active { background: var(--primary-light); color: var(--primary); font-weight: 500; }

.nav-icon {
  width: 24px; height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
  background: rgba(0,0,0,0.05);
}

.nav-item.active .nav-icon { background: var(--primary); color: #fff; }

.sidebar-footer { padding: 16px; border-top: 1px solid var(--border); }

.wx-status { display: flex; align-items: center; gap: 8px; font-size: 12px; }

.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-tertiary);
}

.wx-status.connected .status-dot { background: var(--success); }
.wx-status.disconnected .status-dot { background: var(--danger); }

.main {
  margin-left: 220px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.topbar {
  padding: 20px 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar h1 { font-size: 18px; font-weight: 600; }

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

.content { padding: 24px 28px; flex: 1; }

.btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

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

.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-success:hover { opacity: 0.9; }

.btn-danger { color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: var(--danger-light); }

.btn-sm { padding: 5px 10px; font-size: 12px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.card-title { font-size: 14px; font-weight: 600; margin-bottom: 16px; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

.stat-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 8px; }
.stat-value { font-size: 28px; font-weight: 600; }
.stat-trend { font-size: 12px; color: var(--text-tertiary); margin-top: 4px; }

.stat-card.primary { border-color: var(--primary); background: var(--primary-light); }
.stat-card.primary .stat-value { color: var(--primary); }
.stat-card.success { border-color: var(--success); background: var(--success-light); }
.stat-card.success .stat-value { color: var(--success); }
.stat-card.warning { border-color: var(--warning); background: var(--warning-light); }
.stat-card.warning .stat-value { color: var(--warning); }
.stat-card.info { border-color: var(--info); background: var(--info-light); }
.stat-card.info .stat-value { color: var(--info); }

.table { width: 100%; border-collapse: collapse; }

.table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.table td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.table tr:hover td { background: var(--surface-hover); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
}

.badge-draft { background: var(--warning-light); color: var(--warning); }
.badge-approved { background: var(--info-light); color: var(--info); }
.badge-in-draft { background: var(--primary-light); color: var(--primary); }
.badge-publishing { background: var(--info-light); color: var(--info); }
.badge-published { background: var(--success-light); color: var(--success); }
.badge-rejected { background: var(--danger-light); color: var(--danger); }
.badge-pending { background: var(--surface-hover); color: var(--text-secondary); }
.badge-analyzed { background: var(--success-light); color: var(--success); }

.source-tag {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 11px;
}

.source-wechat { background: var(--info-light); color: var(--info); }
.source-zhihu { background: #fbeaf0; color: #993556; }
.source-xiaohongshu { background: #fbeaf0; color: #d4537e; }
.source-douyin { background: var(--success-light); color: var(--success); }
.source-guoxue { background: var(--warning-light); color: var(--warning); }
.source-manual { background: var(--surface-hover); color: var(--text-secondary); }
.source-other { background: var(--surface-hover); color: var(--text-secondary); }

.form-group { margin-bottom: 16px; }

.form-label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; }

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.15s;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary);
}

.form-textarea { resize: vertical; min-height: 80px; }

.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.3);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-overlay.show { display: flex; }

.modal {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 600px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.modal-title { font-size: 16px; font-weight: 600; margin-bottom: 20px; }

.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  background: var(--text);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 13px;
  z-index: 2000;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s;
  pointer-events: none;
}

.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }

.chart-container {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  height: 120px;
  padding-top: 20px;
}

.chart-bar-group { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; }

.chart-bars { display: flex; gap: 3px; align-items: flex-end; height: 80px; }

.chart-bar { width: 14px; border-radius: 3px 3px 0 0; transition: height 0.3s; }

.chart-bar.materials { background: var(--info); }
.chart-bar.articles { background: var(--primary); }

.chart-label { font-size: 11px; color: var(--text-secondary); }

.empty-state { text-align: center; padding: 40px 20px; color: var(--text-tertiary); }

.article-content-preview {
  max-height: 200px;
  overflow-y: auto;
  padding: 12px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.8;
}

.article-content-preview img { max-width: 100%; }

.cover-preview {
  width: 100%;
  max-width: 300px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 12px;
}

.cover-canvas-wrapper {
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
  margin-bottom: 12px;
}

.keyword-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.keyword-tag {
  padding: 2px 8px;
  background: var(--surface-hover);
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-secondary);
}

.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 16px; }

.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filter-bar .form-input, .filter-bar .form-select { width: auto; min-width: 140px; }

.pipeline-mini {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  flex-wrap: wrap;
}

.pipeline-step { padding: 2px 6px; border-radius: 3px; background: var(--surface-hover); color: var(--text-tertiary); }
.pipeline-step.active { background: var(--primary-light); color: var(--primary); font-weight: 500; }
.pipeline-step.done { background: var(--success-light); color: var(--success); }
.pipeline-arrow { color: var(--text-tertiary); }

@media (max-width: 1024px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .sidebar { width: 60px; }
  .brand-text, .nav-item span:not(.nav-icon) { display: none; }
  .main { margin-left: 60px; }
}