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

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --border-color: #e2e8f0;
    --text-color: #334155;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f1f5f9;
}

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, var(--primary-color), #1e40af);
    color: white;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 20px;
    font-weight: bold;
    padding: 15px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: 15px 18px;
    display: block;
    transition: background-color 0.3s;
    border-radius: 4px;
}

.nav-menu a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-menu a i {
    margin-right: 5px;
}

/* 用户菜单下拉 */
.user-menu .dropdown {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    box-shadow: var(--shadow-lg);
    border-radius: 4px;
    min-width: 180px;
    padding: 8px 0;
    list-style: none;
}

.user-menu:hover .dropdown {
    display: block;
}

.user-menu .dropdown a {
    color: var(--text-color);
    padding: 10px 15px;
}

.user-menu .dropdown a:hover {
    background-color: var(--light-color);
}

/* 主容器 */
.main-container {
    min-height: calc(100vh - 120px);
}

.content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 20px;
}

/* 页面头部 */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.page-header h1 {
    font-size: 28px;
    color: var(--dark-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-header p {
    margin-top: 5px;
    color: var(--secondary-color);
    font-size: 14px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 15px;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    font-size: 40px;
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

.stat-blue .stat-icon {
    background: #dbeafe;
    color: var(--primary-color);
}

.stat-green .stat-icon {
    background: #d1fae5;
    color: var(--success-color);
}

.stat-warning .stat-icon {
    background: #fef3c7;
    color: var(--warning-color);
}

.stat-purple .stat-icon {
    background: #e9d5ff;
    color: #9333ea;
}

.stat-info .stat-icon {
    background: #dbeafe;
    color: var(--info-color);
}

.stat-success .stat-icon {
    background: #d1fae5;
    color: var(--success-color);
}

.stat-content h3 {
    font-size: 32px;
    font-weight: bold;
    color: var(--dark-color);
}

.stat-content p {
    color: var(--secondary-color);
    font-size: 14px;
}

/* 区块 */
.section {
    background: white;
    border-radius: 8px;
    padding: 25px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.section h2 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

/* 快速操作 */
.quick-actions {
    background: white;
    border-radius: 8px;
    padding: 25px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.quick-actions h2 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* 按钮 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #1d4ed8;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #475569;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-warning:hover {
    background-color: #d97706;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-info {
    background-color: var(--info-color);
    color: white;
}

.btn-info:hover {
    background-color: #2563eb;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* 表格 */
.table-responsive {
    overflow-x: auto;
}

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

.data-table thead {
    background-color: var(--light-color);
}

.data-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--dark-color);
    border-bottom: 2px solid var(--border-color);
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background-color: var(--light-color);
}

.data-table .total-row {
    background-color: var(--light-color);
    font-weight: bold;
}

/* 徽章 */
.badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    display: inline-block;
}

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

.badge-warning {
    background-color: #fef3c7;
    color: #d97706;
}

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

.badge-info {
    background-color: #dbeafe;
    color: #2563eb;
}

.badge-secondary {
    background-color: #e2e8f0;
    color: var(--secondary-color);
}

/* 表单 */
.form-container {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.form {
    max-width: 800px;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-text {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: var(--secondary-color);
}

.required {
    color: var(--danger-color);
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.input-group {
    display: flex;
    gap: 10px;
}

.input-group input {
    flex: 1;
}

/* 筛选区 */
.filter-section {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.filter-form {
    display: flex;
    gap: 10px;
}

.filter-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    flex: 1;
}

.filter-group input,
.filter-group select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

.filter-group label {
    font-weight: 500;
    color: var(--dark-color);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-top: 20px;
}

.page-info {
    color: var(--secondary-color);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow: auto;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    box-shadow: var(--shadow-lg);
    animation: modalFadeIn 0.3s;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.close {
    color: var(--secondary-color);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

.close:hover {
    color: var(--dark-color);
}

.modal-body {
    padding: 25px;
}

.modal-footer {
    padding: 20px 25px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* 提醒框 */
.alert {
    padding: 15px 20px;
    border-radius: 6px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background-color: #d1fae5;
    color: #059669;
    border-left: 4px solid var(--success-color);
}

.alert-error {
    background-color: #fee2e2;
    color: #dc2626;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background-color: #fef3c7;
    color: #d97706;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background-color: #dbeafe;
    color: #2563eb;
    border-left: 4px solid var(--info-color);
}

/* 信息卡片 */
.info-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.info-row {
    display: flex;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    font-weight: 500;
    color: var(--dark-color);
    width: 150px;
}

.info-value {
    flex: 1;
    color: var(--text-color);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--secondary-color);
}

.empty-state i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.3;
}

.empty-state p {
    font-size: 16px;
}

/* 登录页面 */
.login-page {
    background: linear-gradient(135deg, var(--primary-color), #1e40af);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

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

.login-box {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.login-header {
    text-align: center;
    padding: 40px 30px 30px;
    background: linear-gradient(135deg, var(--primary-color), #1e40af);
    color: white;
}

.login-header i {
    font-size: 48px;
    margin-bottom: 15px;
}

.login-header h1 {
    font-size: 24px;
    margin-bottom: 10px;
}

.login-header p {
    opacity: 0.9;
    font-size: 14px;
}

.login-form {
    padding: 30px;
}

.login-footer {
    padding: 20px 30px;
    background-color: var(--light-color);
    text-align: center;
}

/* 网格布局 */
.row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.col-6 {
    grid-column: span 1;
}

/* 页脚 */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 20px 0;
    margin-top: 40px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.footer p {
    margin: 5px 0;
    opacity: 0.8;
}

/* 工具类 */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--secondary-color);
}

.text-right {
    text-align: right;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
    }
    
    .nav-menu {
        flex-direction: column;
        width: 100%;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
}