/* 基础样式 */
:root {
    --primary-color: #3B82F6;
    --primary-dark: #2563EB;
    --secondary-color: #64748B;
    --success-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --background-color: #F1F5F9;
    --card-background: #FFFFFF;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --border-color: #E2E8F0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
}

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

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

/* 页面容器 */
.page {
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* 登录页面 */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: var(--radius);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 28px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    margin-bottom: 0;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

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

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

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-outline:hover {
    background: var(--background-color);
}

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

.btn-danger:hover {
    background: #DC2626;
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

/* 错误消息 */
.error-message {
    color: var(--danger-color);
    font-size: 14px;
    margin-top: 16px;
    text-align: center;
}

/* 主界面布局 */
#main-page {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 260px;
    background: white;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 20px;
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 4px;
    transition: all 0.2s;
}

.nav-item:hover {
    background: var(--background-color);
    color: var(--text-primary);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.nav-item .icon {
    font-size: 20px;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 24px;
    min-height: 100vh;
}

.content-page {
    max-width: 1400px;
    margin: 0 auto;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 28px;
    color: var(--text-primary);
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow);
}

.stat-icon {
    font-size: 40px;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #E0E7FF, #C7D2FE);
    border-radius: var(--radius-sm);
}

.stat-info h3 {
    font-size: 32px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

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

/* 快捷操作 */
.quick-actions {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.quick-actions h2 {
    font-size: 18px;
    margin-bottom: 16px;
}

.action-buttons {
    display: flex;
    gap: 12px;
}

/* 表格容器 */
.table-container {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

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

.data-table th,
.data-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--background-color);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
    text-transform: uppercase;
}

.data-table td {
    color: var(--text-primary);
}

.data-table tr:hover td {
    background: #F8FAFC;
}

.data-table .loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
}

.data-table .actions {
    display: flex;
    gap: 8px;
}

/* 上传区域 */
.upload-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.upload-card,
.preview-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.upload-card h3,
.preview-card h3 {
    margin-bottom: 8px;
}

.upload-hint {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-sm);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.file-upload-area:hover,
.file-upload-area.dragover {
    border-color: var(--primary-color);
    background: #F0F7FF;
}

.file-upload-content {
    color: var(--text-secondary);
}

.upload-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 12px;
}

.file-name {
    color: var(--primary-color);
    font-weight: 500;
    margin-top: 12px;
}

/* 分频版上传区域样式 */
.frequency-upload-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

.frequency-upload-item {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.frequency-label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
}

.frequency-label .freq-icon {
    font-size: 18px;
}

.frequency-label.high-freq {
    background: linear-gradient(135deg, #FF6B6B 0%, #EE5A5A 100%);
    color: white;
}

.frequency-label.mid-freq {
    background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
    color: white;
}

.frequency-label.low-freq {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    color: white;
}

.frequency-upload-item .file-upload-area {
    padding: 24px;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.frequency-upload-item .upload-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.frequency-upload-item .file-upload-content p {
    font-size: 13px;
    margin: 0;
}

@media (max-width: 900px) {
    .frequency-upload-grid {
        grid-template-columns: 1fr;
    }
}

.preview-table-container {
    max-height: 400px;
    overflow-y: auto;
    margin-top: 16px;
}

#preview-stats {
    padding: 12px;
    background: var(--background-color);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

/* 设置页面 */
.settings-container {
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.settings-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.settings-card h3 {
    margin-bottom: 8px;
}

.settings-hint {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

/* 设置开关组件 */
.settings-switches {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.switch-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background: var(--background-color);
    border-radius: var(--radius-sm);
}

.switch-info label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.switch-desc {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 开关按钮样式 */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
    flex-shrink: 0;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #CBD5E1;
    transition: .3s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

input:checked + .slider {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

input:checked + .slider:before {
    transform: translateX(22px);
}

.slider.round {
    border-radius: 28px;
}

.slider.round:before {
    border-radius: 50%;
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background: white;
    border-radius: var(--radius);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-large {
    max-width: 700px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 20px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-content form {
    padding: 24px;
}

/* Toast 消息 */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 16px 24px;
    background: var(--text-primary);
    color: white;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    animation: slideIn 0.3s ease;
}

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

.toast.error {
    background: var(--danger-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

.status-badge.active {
    background: #D1FAE5;
    color: #059669;
}

.status-badge.inactive {
    background: #FEE2E2;
    color: #DC2626;
}

.status-badge.pinned {
    background: #FEF3C7;
    color: #D97706;
}

/* 响应式 */
@media (max-width: 1024px) {
    .upload-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }

    .main-content {
        margin-left: 0;
    }

    #main-page {
        flex-direction: column;
    }

    .sidebar-nav {
        display: flex;
        overflow-x: auto;
        padding: 8px;
    }

    .nav-item {
        flex-shrink: 0;
    }

    .page-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
}

/* 新增样式 */
.form-row {
    display: flex;
    gap: 16px;
}

.form-row .form-group {
    flex: 1;
}

.radio-group {
    display: flex;
    gap: 20px;
    margin-top: 8px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.radio-label input[type="radio"] {
    width: auto;
}

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

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #D1FAE5;
    color: #065F46;
}

.badge-warning {
    background: #FEF3C7;
    color: #92400E;
}

.badge-secondary {
    background: #E2E8F0;
    color: #475569;
}

.badge-info {
    background: #DBEAFE;
    color: #1E40AF;
}

.badge-primary {
    background: #EDE9FE;
    color: #6D28D9;
}

.btn-icon {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 6px;
    cursor: pointer;
    font-size: 10px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

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

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

.btn-sm.btn-primary:hover {
    background: var(--primary-dark);
}

/* 表单提示文字 */
.form-hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
    font-style: italic;
}

/* 灰色文字 */
.text-muted {
    color: var(--text-secondary);
}

/* 顶级词库行样式 */
.top-level-row {
    background-color: #FAFBFC;
}

.sub-level-row td:nth-child(2) {
    color: var(--text-secondary);
}
/* ==================== 用户管理页面 ==================== */

/* 搜索栏 */
.search-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    background: var(--card-background);
    padding: 16px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.search-bar input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* 用户表格 */
.uid-cell {
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 12px;
    color: var(--text-secondary);
}

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    padding: 16px;
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 14px;
    margin-right: 16px;
}

/* 头部操作区 */
.header-actions {
    display: flex;
    gap: 12px;
}

/* 用户详情模态框 */
.user-info-card,
.user-purchases-card,
.user-trials-card {
    background: #F8FAFC;
    border-radius: var(--radius-sm);
    padding: 20px;
    margin-bottom: 20px;
}

.user-info-card h3,
.user-purchases-card h3,
.user-trials-card h3 {
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-item label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.info-item span {
    font-size: 14px;
    color: var(--text-primary);
    word-break: break-all;
}

/* 迷你表格 */
.data-table.mini {
    font-size: 13px;
}

.data-table.mini th,
.data-table.mini td {
    padding: 10px 12px;
}

/* 空数据提示 */
.empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px !important;
    font-style: italic;
}

/* 模态框大小 */
.modal-large .modal-content {
    max-width: 800px;
}

.modal-body {
    max-height: 60vh;
    overflow-y: auto;
}