/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

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

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

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

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #667eea;
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background-color: #5568d3;
}

.btn-success {
    background-color: #28a745;
    color: white;
}

.btn-success:hover {
    background-color: #218838;
}

.btn-danger {
    background-color: #dc3545;
    color: white;
}

.btn-danger:hover {
    background-color: #c82333;
}

.btn-warning {
    background-color: #ffc107;
    color: #333;
}

.btn-warning:hover {
    background-color: #e0a800;
}

.alert {
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.login-tip {
    margin-top: 20px;
    text-align: center;
    color: #666;
    font-size: 12px;
}

/* 主布局 */
.header {
    background-color: #2c3e50;
    color: white;
    padding: 15px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 24px;
}

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

.header-user span {
    color: #ecf0f1;
}

.logout-btn {
    background-color: #e74c3c;
    color: white;
    padding: 8px 15px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 14px;
}

.logout-btn:hover {
    background-color: #c0392b;
}

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

/* 导航菜单 */
.nav-menu {
    background-color: white;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.nav-menu ul {
    list-style: none;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.nav-menu a {
    color: #333;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    background-color: #667eea;
    color: white;
}

/* 卡片 */
.card {
    background-color: white;
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.card-header {
    border-bottom: 1px solid #eee;
    padding-bottom: 15px;
    margin-bottom: 15px;
}

.card-header h2 {
    font-size: 20px;
    color: #333;
}

/* 表格 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

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

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #333;
}

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

.table-actions {
    display: flex;
    gap: 10px;
}

/* 表单 */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

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

/* 状态标签 */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 3px;
    font-size: 12px;
    font-weight: 500;
}

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

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

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

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

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

.pagination a,
.pagination span {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    text-decoration: none;
    color: #333;
}

.pagination a:hover {
    background-color: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination .active {
    background-color: #667eea;
    color: white;
    border-color: #667eea;
}

/* 选项卡样式 */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid #eee;
    margin-bottom: 20px;
}

.tab-link {
    padding: 12px 24px;
    text-decoration: none;
    color: #333;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
    font-weight: 500;
}

.tab-link:hover {
    color: #667eea;
    border-bottom-color: #667eea;
}

.tab-link.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

/* 响应式 */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .table {
        font-size: 12px;
    }
    
    .table th,
    .table td {
        padding: 8px;
    }
    
    .tabs {
        flex-wrap: wrap;
    }
    
    .tab-link {
        padding: 10px 15px;
        font-size: 14px;
    }
}