/* 后台管理样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f5f6fa;
    min-height: 100vh;
}

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

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 30px;
    text-align: center;
}

.login-header h1 {
    font-size: 24px;
    margin-bottom: 5px;
}

.login-header p {
    opacity: 0.9;
}

form {
    padding: 30px;
}

.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: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.captcha-box {
    display: flex;
    gap: 10px;
}

.captcha-box input {
    flex: 1;
}

.captcha-box img {
    height: 46px;
    border-radius: 8px;
    cursor: pointer;
}

.btn-primary {

    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
}

/* 后台布局 */
.admin-container {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 250px;
    background: #2c3e50;
    color: #fff;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    font-size: 18px;
}

.sidebar-menu {
    padding: 15px 0;
}

.menu-item {
    display: block;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s;
}

.menu-item:hover, .menu-item.active {
    background: rgba(102, 126, 234, 0.3);
    color: #fff;
}

.menu-item i {
    margin-right: 10px;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 20px;
}

.page-header {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-header h1 {
    font-size: 20px;
    color: #333;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

.stat-card {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.stat-card h3 {
    font-size: 14px;
    color: #999;
    margin-bottom: 10px;
}

.stat-card .value {
    font-size: 28px;
    font-weight: bold;
    color: #667eea;
}

/* 数据表格 */
.data-table {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.table-header {
    padding: 15px 20px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

th, td {
    padding: 12px 20px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

th {
    background: #f8f9fa;
    font-weight: 500;
    color: #666;
}

tr:hover {
    background: #f8f9fa;
}

.btn {
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
}

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

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

.btn-danger {
    background: #f44336;
    color: #fff;
}

.btn-warning {
    background: #ff9800;
    color: #fff;
}

.btn-info {
    background: #2196F3;
    color: #fff;
}

/* 分页 */
.pagination {
    padding: 15px 20px;
    display: flex;
    justify-content: center;
    gap: 5px;
}

.pagination a, .pagination span {
    padding: 8px 12px;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    color: #666;
    text-decoration: none;
}

.pagination a:hover, .pagination .current {
    background: #667eea;
    color: #fff;
    border-color: #667eea;
}

/* 表单卡片 */
.form-card {
    background: #fff;
    border-radius: 8px;
    padding: 30px;
    max-width: 600px;
}

.form-actions {
    margin-top: 20px;
    display: flex;
    gap: 10px;
}

/* 响应式 */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .main-content {
        margin-left: 0;
    }
}