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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: #f5f7fa;
  color: #333;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

/* 登录页 */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-header {
  text-align: center;
  margin-bottom: 40px;
  color: white;
}

.login-header .logo {
  font-size: 64px;
  margin-bottom: 16px;
}

.login-header h1 {
  font-size: 28px;
  margin-bottom: 8px;
}

.login-header p {
  opacity: 0.9;
}

.login-form {
  background: white;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
  width: 100%;
  max-width: 400px;
}

/* 布局 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 600;
}

.navbar-brand .logo {
  font-size: 28px;
}

.navbar-user {
  display: flex;
  align-items: center;
  gap: 16px;
}

.sidebar {
  position: fixed;
  top: 60px;
  left: 0;
  bottom: 0;
  width: 220px;
  background: white;
  border-right: 1px solid #e8e8e8;
  padding-top: 16px;
}

.sidebar-menu {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 12px;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  color: #666;
}

.menu-item:hover {
  background: #f5f7fa;
  color: #333;
}

.menu-item.active {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.content {
  margin-left: 220px;
  margin-top: 60px;
  padding: 24px;
  min-height: calc(100vh - 60px);
}

.tab-content {
  display: none;
}

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

/* 通用组件 */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-header h2 {
  font-size: 24px;
  font-weight: 600;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #d9d9d9;
  border-radius: 8px;
  font-size: 14px;
  transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-success {
  background: #52c41a;
  color: white;
}

.btn-danger {
  background: #ff4d4f;
  color: white;
}

.btn-default {
  background: #f0f0f0;
  color: #333;
}

.btn-text {
  background: transparent;
  color: white;
  padding: 8px 12px;
}

.btn-text:hover {
  background: rgba(255,255,255,0.1);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-block {
  width: 100%;
}

.btn + .btn {
  margin-left: 8px;
}

/* 统计栏 */
.stats-bar {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
}

.stat-card {
  background: white;
  padding: 24px;
  border-radius: 12px;
  flex: 1;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: #667eea;
  margin-bottom: 4px;
}

.stat-label {
  color: #999;
  font-size: 14px;
}

/* 工具栏 */
.toolbar {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

.toolbar input {
  flex: 1;
  max-width: 400px;
  padding: 12px 16px;
  border: 1px solid #d9d9d9;
  border-radius: 8px;
  font-size: 14px;
}

/* 表格 */
.table-container {
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  overflow: hidden;
}

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

thead {
  background: #fafafa;
}

th, td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid #f0f0f0;
}

th {
  font-weight: 600;
  color: #666;
  font-size: 13px;
  text-transform: uppercase;
}

tbody tr:hover {
  background: #fafafa;
}

/* 弹窗 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: white;
  border-radius: 16px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow: hidden;
}

.modal-content.large {
  max-width: 800px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid #f0f0f0;
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 600;
}

.close-btn {
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: #999;
  line-height: 1;
}

.close-btn:hover {
  color: #333;
}

.modal-body {
  padding: 24px;
  max-height: 60vh;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid #f0f0f0;
}

/* 详情页 */
.detail-section {
  margin-bottom: 24px;
}

.detail-section h4 {
  margin-bottom: 12px;
  color: #666;
  font-size: 14px;
  text-transform: uppercase;
}

.detail-row {
  display: flex;
  padding: 8px 0;
  border-bottom: 1px solid #f0f0f0;
}

.detail-label {
  width: 120px;
  color: #999;
}

.detail-value {
  flex: 1;
  color: #333;
}

.print-data-box {
  background: #f5f7fa;
  border: 1px solid #e8e8e8;
  border-radius: 8px;
  padding: 16px;
  font-family: monospace;
  word-break: break-all;
  margin-top: 12px;
}

.items-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

.items-table th,
.items-table td {
  padding: 10px;
  border: 1px solid #e8e8e8;
  font-size: 13px;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  background: #e8f4fd;
  color: #1890ff;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: #999;
}

/* Toast 通知 */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 16px 24px;
  border-radius: 8px;
  color: white;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  z-index: 2000;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.toast-success {
  background: #52c41a;
}

.toast-error {
  background: #ff4d4f;
}

.toast-info {
  background: #1890ff;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
}

.pagination .page-info {
  color: #666;
  font-size: 14px;
}

/* 表单网格 */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (max-width: 768px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

/* 列设置 */
.column-settings {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.column-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
}

.column-option input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.column-option label {
  cursor: pointer;
  font-size: 14px;
}

/* 工具栏增强 */
.toolbar select {
  padding: 12px 16px;
  border: 1px solid #d9d9d9;
  border-radius: 8px;
  font-size: 14px;
  background: white;
}

/* 表头操作 */
.header-actions {
  display: flex;
  gap: 12px;
}