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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f5f5f5;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* 按钮样式 */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-success {
  background: #4CAF50;
  color: white;
}

.btn-success:hover {
  background: #45a049;
}

.btn-danger {
  background: #ff6b6b;
  color: white;
}

.btn-danger:hover {
  background: #ff5252;
}

.btn-secondary {
  background: #6c757d;
  color: white;
}

.btn-secondary:hover {
  background: #5a6268;
}

/* 表单样式 */
.form-control {
  width: 100%;
  padding: 10px;
  border: 2px solid #eee;
  border-radius: 6px;
  font-size: 14px;
  transition: all 0.3s ease;
}

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

/* 卡片样式 */
.card {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  padding: 20px;
  margin-bottom: 20px;
}

.card-header {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid #eee;
}

/* 表格样式 */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #eee;
}

.table th {
  background: #f8f9fa;
  font-weight: 600;
  color: #666;
}

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

/* 徽章样式 */
.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: #d4edda;
  color: #155724;
}

.badge-warning {
  background: #fff3cd;
  color: #856404;
}

.badge-danger {
  background: #f8d7da;
  color: #721c24;
}

.badge-info {
  background: #d1ecf1;
  color: #0c5460;
}

/* 加载动画 */
.loading {
  text-align: center;
  padding: 40px;
  color: #999;
}

.loading::after {
  content: '...';
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0%, 20% { content: '.'; }
  40% { content: '..'; }
  60%, 100% { content: '...'; }
}

/* 空状态 */
.empty {
  text-align: center;
  padding: 60px 20px;
  color: #999;
  font-size: 16px;
}

/* 响应式 */
@media (max-width: 768px) {
  .container {
    padding: 10px;
  }

  .card {
    padding: 15px;
  }

  .table {
    font-size: 12px;
  }

  .table th,
  .table td {
    padding: 8px;
  }
}