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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  background: white;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}

header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 30px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  font-size: 28px;
  font-weight: 600;
}

.header-info {
  display: flex;
  align-items: center;
  gap: 20px;
}

#updateTime {
  font-size: 14px;
  opacity: 0.9;
}

.btn-refresh {
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
}

.btn-refresh:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.nav-tabs {
  display: flex;
  background: #f8f9fa;
  border-bottom: 1px solid #e9ecef;
  padding: 0 40px;
}

.tab-btn {
  padding: 20px 30px;
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  color: #6c757d;
  border-bottom: 3px solid transparent;
  transition: all 0.3s;
}

.tab-btn:hover {
  color: #667eea;
  background: rgba(102, 126, 234, 0.05);
}

.tab-btn.active {
  color: #667eea;
  border-bottom-color: #667eea;
  font-weight: 600;
}

main {
  padding: 40px;
}

.tab-content {
  display: none;
}

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

.stats-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid #e9ecef;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.card-icon {
  font-size: 48px;
  line-height: 1;
}

.card-content h3 {
  font-size: 14px;
  color: #6c757d;
  margin-bottom: 8px;
  font-weight: 500;
}

.card-value {
  font-size: 32px;
  font-weight: 700;
  color: #212529;
}

.charts-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: 24px;
}

.chart-box {
  background: white;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  border: 1px solid #e9ecef;
}

.chart-box.full-width {
  grid-column: 1 / -1;
}

.chart-box h3 {
  font-size: 18px;
  color: #212529;
  margin-bottom: 20px;
  font-weight: 600;
}

.filter-section {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  align-items: flex-end;
}

.filter-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.filter-item label {
  font-size: 14px;
  color: #495057;
  font-weight: 500;
}

.filter-item input {
  padding: 10px 16px;
  border: 1px solid #ced4da;
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.3s;
}

.filter-item input:focus {
  outline: none;
  border-color: #667eea;
}

.btn-filter, .btn-reset {
  padding: 10px 24px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s;
}

.btn-filter {
  background: #667eea;
  color: white;
}

.btn-filter:hover {
  background: #5568d3;
  transform: translateY(-2px);
}

.btn-reset {
  background: #e9ecef;
  color: #495057;
}

.btn-reset:hover {
  background: #dee2e6;
}

.pagination-info {
  margin-bottom: 16px;
  color: #6c757d;
  font-size: 14px;
}

.user-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

.user-table th {
  padding: 16px;
  text-align: left;
  font-weight: 600;
  font-size: 14px;
}

.user-table td {
  padding: 16px;
  border-bottom: 1px solid #e9ecef;
  font-size: 14px;
  color: #495057;
}

.user-table tbody tr:hover {
  background: #f8f9fa;
}

.user-table img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin-top: 32px;
}

.pagination button {
  padding: 10px 24px;
  background: #667eea;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
}

.pagination button:hover:not(:disabled) {
  background: #5568d3;
  transform: translateY(-2px);
}

.pagination button:disabled {
  background: #ced4da;
  cursor: not-allowed;
}

.pagination span {
  font-size: 14px;
  color: #495057;
}

.user-list-section {
  margin-top: 40px;
}

.user-list-section h3 {
  font-size: 18px;
  color: #212529;
  margin-bottom: 20px;
  font-weight: 600;
}

/* 内容表格样式 */
.content-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

.content-table th {
  padding: 16px;
  text-align: left;
  font-weight: 600;
  font-size: 14px;
}

.content-table td {
  padding: 16px;
  border-bottom: 1px solid #e9ecef;
  font-size: 14px;
  color: #495057;
}

.content-table tbody tr:hover {
  background: #f8f9fa;
}

.content-table img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

/* 内容预览样式 */
.content-preview {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.6;
}

/* 操作按钮样式 */
.btn-delete {
  padding: 8px 16px;
  background: #ef4444;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.3s;
  margin-right: 8px;
}

.btn-delete:hover {
  background: #dc2626;
  transform: translateY(-1px);
}

.btn-view {
  padding: 8px 16px;
  background: #667eea;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.3s;
}

.btn-view:hover {
  background: #5568d3;
  transform: translateY(-1px);
}

/* 模态框样式 */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background-color: white;
  margin: 15% auto;
  padding: 30px;
  border-radius: 12px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  animation: slideIn 0.3s ease;
  position: relative;
}

@keyframes slideIn {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  line-height: 1;
  position: absolute;
  right: 20px;
  top: 20px;
}

.close:hover {
  color: #000;
}

.modal-content h3 {
  margin-bottom: 20px;
  color: #212529;
  font-size: 20px;
}

.modal-content p {
  color: #6c757d;
  line-height: 1.6;
}

.btn-danger {
  padding: 12px 30px;
  background: #ef4444;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.3s;
  margin-right: 12px;
}

.btn-danger:hover {
  background: #dc2626;
  transform: translateY(-2px);
}

.btn-cancel {
  padding: 12px 30px;
  background: #e9ecef;
  color: #495057;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.3s;
}

.btn-cancel:hover {
  background: #dee2e6;
}

/* 状态标签样式 */
.status-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.status-badge.normal {
  background: #d1fae5;
  color: #059669;
}

.status-badge.reported {
  background: #fee2e2;
  color: #dc2626;
}