/**
 * ChangoPSS - 主样式文件 v2.0
 * 版本: 20260101_v3
 * 设计风格: 毛玻璃现代化 + 专业数据分析
 */

/* ==================== CSS变量定义 ==================== */
:root {
    /* 品牌色 */
    --pss-primary: #2563eb;
    --pss-primary-hover: #1d4ed8;
    --pss-primary-light: rgba(37, 99, 235, 0.1);
    --pss-secondary: #059669;
    --pss-secondary-light: rgba(5, 150, 105, 0.1);
    --pss-accent: #f59e0b;
    --pss-accent-light: rgba(245, 158, 11, 0.1);
    
    /* 语义色 */
    --pss-success: #10b981;
    --pss-warning: #f59e0b;
    --pss-error: #ef4444;
    --pss-info: #3b82f6;
    
    /* 中性色 */
    --pss-gray-50: #f9fafb;
    --pss-gray-100: #f3f4f6;
    --pss-gray-200: #e5e7eb;
    --pss-gray-300: #d1d5db;
    --pss-gray-400: #9ca3af;
    --pss-gray-500: #6b7280;
    --pss-gray-600: #4b5563;
    --pss-gray-700: #374151;
    --pss-gray-800: #1f2937;
    --pss-gray-900: #111827;
    
    /* 毛玻璃效果 */
    --pss-glass-bg: rgba(255, 255, 255, 0.85);
    --pss-glass-border: rgba(255, 255, 255, 0.2);
    --pss-glass-blur: blur(12px);
    
    /* 间距 */
    --pss-space-xs: 4px;
    --pss-space-sm: 8px;
    --pss-space-md: 16px;
    --pss-space-lg: 24px;
    --pss-space-xl: 32px;
    
    /* 圆角 */
    --pss-radius-sm: 6px;
    --pss-radius-md: 10px;
    --pss-radius-lg: 14px;
    --pss-radius-xl: 18px;
    
    /* 字体 */
    --pss-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
    --pss-font-mono: 'SF Mono', 'Fira Code', Consolas, monospace;
    
    /* 阴影 */
    --pss-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --pss-shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --pss-shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    
    /* 过渡 */
    --pss-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== 三主题适配 ==================== */
.mode-light {
    --pss-glass-bg: rgba(255, 255, 255, 0.9);
    --pss-card-bg: #ffffff;
    --pss-text: #1f2937;
    --pss-text-muted: #6b7280;
    --pss-border: rgba(0, 0, 0, 0.08);
}

.mode-dark {
    --pss-glass-bg: rgba(30, 30, 30, 0.85);
    --pss-card-bg: #1f1f1f;
    --pss-text: #e5e7eb;
    --pss-text-muted: #9ca3af;
    --pss-border: rgba(255, 255, 255, 0.1);
    --pss-gray-50: #111827;
    --pss-gray-100: #1f2937;
}

.mode-scifi {
    --pss-glass-bg: rgba(10, 25, 41, 0.8);
    --pss-card-bg: rgba(10, 25, 41, 0.9);
    --pss-text: #00f3ff;
    --pss-text-muted: rgba(0, 243, 255, 0.7);
    --pss-border: rgba(0, 243, 255, 0.2);
    --pss-primary: #00f3ff;
    --pss-primary-light: rgba(0, 243, 255, 0.15);
}

/* ==================== 全局样式 ==================== */
body {
    font-family: var(--pss-font-sans);
    background: linear-gradient(135deg, #f0f4ff 0%, #e8f4f8 50%, #fff8f0 100%);
    color: var(--pss-text, var(--pss-gray-800));
    line-height: 1.5;
    min-height: 100vh;
}

.mode-dark body {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #1f2937 100%);
}

.mode-scifi body {
    background: linear-gradient(135deg, #0a1929 0%, #001e3c 50%, #0a1929 100%);
}

/* ==================== 毛玻璃卡片 ==================== */
.pss-glass-card {
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    -webkit-backdrop-filter: var(--pss-glass-blur);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-lg);
    box-shadow: var(--pss-shadow-md);
    transition: var(--pss-transition);
}

.pss-glass-card:hover {
    box-shadow: var(--pss-shadow-lg);
    transform: translateY(-2px);
}

.mode-scifi .pss-glass-card {
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.15);
}

.mode-scifi .pss-glass-card:hover {
    box-shadow: 0 0 30px rgba(0, 243, 255, 0.25);
}

/* ==================== 页面头部 ==================== */
.pss-header {
    background: linear-gradient(135deg, var(--pss-primary) 0%, #1e40af 100%);
    color: white;
    padding: 0 var(--pss-space-lg);
    height: 56px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--pss-shadow-md);
}

.mode-scifi .pss-header {
    background: linear-gradient(135deg, rgba(10, 25, 41, 0.95) 0%, rgba(0, 30, 60, 0.95) 100%);
    border-bottom: 1px solid rgba(0, 243, 255, 0.3);
}

.pss-header-inner {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.pss-logo {
    display: flex;
    align-items: center;
    gap: var(--pss-space-sm);
    color: white;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
}

.pss-logo i { font-size: 1.3rem; }
.pss-logo:hover { color: white; opacity: 0.9; }

.pss-nav {
    display: flex;
    gap: var(--pss-space-md);
}

.pss-nav-item {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: var(--pss-space-xs) var(--pss-space-md);
    border-radius: var(--pss-radius-md);
    transition: var(--pss-transition);
}

.pss-nav-item:hover, .pss-nav-item.active {
    color: white;
    background: rgba(255,255,255,0.15);
}

/* 用户头像 */
.pss-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255,255,255,0.3);
}

.pss-user-dropdown {
    position: relative;
}

.pss-user-btn {
    display: flex;
    align-items: center;
    gap: var(--pss-space-sm);
    background: rgba(255,255,255,0.1);
    border: none;
    color: white;
    padding: var(--pss-space-xs) var(--pss-space-md);
    border-radius: var(--pss-radius-lg);
    cursor: pointer;
    transition: var(--pss-transition);
    font-size: 0.85rem;
}

.pss-user-btn:hover { background: rgba(255,255,255,0.2); }

/* 下拉菜单 */
.pss-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    min-width: 180px;
    background: var(--pss-card-bg, white);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-md);
    box-shadow: var(--pss-shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 1000;
}

.pss-dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.pss-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: var(--pss-text, #374151);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--pss-transition);
}

.pss-dropdown-item:hover {
    background: var(--pss-primary-light);
    color: var(--pss-primary);
}

.pss-dropdown-item i {
    width: 16px;
    text-align: center;
    opacity: 0.7;
}

.pss-dropdown-divider {
    height: 1px;
    background: var(--pss-border);
    margin: 8px 0;
}

.pss-user-guest {
    display: flex;
    gap: 8px;
}

/* ==================== 项目Tab导航 ==================== */
.pss-project-tabs {
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    border-bottom: 1px solid var(--pss-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
    padding: 0 var(--pss-space-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.pss-tabs-nav {
    display: flex;
    align-items: center;
    gap: 2px;
    flex: 1 1 auto;
    min-width: 0;
    flex-wrap: nowrap;
    overflow-x: auto;
}

.pss-tab {
    display: flex;
    align-items: center;
    gap: var(--pss-space-sm);
    padding: var(--pss-space-md) var(--pss-space-lg);
    color: var(--pss-text-muted, var(--pss-gray-500));
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    border-bottom: 3px solid transparent;
    transition: var(--pss-transition);
}

.pss-tab:hover {
    color: var(--pss-primary);
    background: var(--pss-primary-light);
}

.pss-tab.active {
    color: var(--pss-primary);
    border-bottom-color: var(--pss-primary);
    background: var(--pss-primary-light);
}

.pss-tabs-actions {
    display: flex;
    align-items: center;
    gap: var(--pss-space-md);
    flex: 0 0 auto;
}

/* 项目切换器：必须同一行显示（避免“当前项目”与下拉框上下分行） */
.pss-project-selector,
.pss-tabs-nav .pss-project-selector {
    display: flex;
    align-items: center;
    gap: var(--pss-space-sm);
    flex-wrap: nowrap;
    white-space: nowrap;
}

.pss-project-selector-inline {
    margin-left: var(--pss-space-md);
    flex: 0 0 auto;
}

.pss-project-label {
    font-size: 0.875rem;
    color: var(--pss-text-muted, var(--pss-gray-500));
    white-space: nowrap;
}

.pss-project-selector .form-select {
    /* 使用 clamp 允许在窄屏适当变窄，但不换行 */
    width: clamp(140px, 18vw, 220px);
    min-width: 140px;
    max-width: 260px;
    font-size: 0.875rem;
    border: 1px solid var(--pss-border);
    background-color: var(--pss-bg);
    color: var(--pss-text);
}

.pss-project-selector .form-select:focus {
    border-color: var(--pss-primary);
    box-shadow: 0 0 0 0.2rem rgba(var(--pss-primary-rgb, 0, 123, 255), 0.25);
}

/* 移动端响应式 */
@media (max-width: 768px) {
    .pss-project-label {
        display: none;
    }
    
    .pss-project-selector .form-select {
        min-width: 150px;
        max-width: 200px;
    }
}

/* ==================== 主内容区 ==================== */
.pss-main {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--pss-space-lg);
    min-height: calc(100vh - 160px);
}

/* ==================== 数据管理页面 ==================== */
.pss-data-page {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--pss-space-lg);
    min-height: 600px;
}

/* 左侧数据集列表 */
.pss-data-section {
    display: flex;
    flex-direction: column;
}

.pss-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--pss-space-md);
    padding-bottom: var(--pss-space-sm);
    border-bottom: 1px solid var(--pss-border);
}

.pss-section-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--pss-text);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--pss-space-sm);
}

.pss-section-header h2 i {
    color: var(--pss-primary);
}

.pss-section-header .btn {
    font-size: 0.8rem;
    padding: var(--pss-space-xs) var(--pss-space-md);
}

/* 数据集卡片列表 */
.pss-dataset-list {
    display: flex;
    flex-direction: column;
    gap: var(--pss-space-sm);
}

.pss-dataset-card {
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-md);
    padding: var(--pss-space-md);
    display: flex;
    align-items: center;
    gap: var(--pss-space-md);
    cursor: pointer;
    transition: var(--pss-transition);
}

.pss-dataset-card:hover {
    border-color: var(--pss-primary);
    background: var(--pss-primary-light);
}

.pss-dataset-card.selected {
    border-color: var(--pss-primary);
    background: var(--pss-primary-light);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.dataset-icon {
    width: 40px;
    height: 40px;
    background: var(--pss-primary-light);
    color: var(--pss-primary);
    border-radius: var(--pss-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.dataset-info {
    flex: 1;
    min-width: 0;
}

.dataset-info h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0 0 var(--pss-space-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--pss-text);
}

.dataset-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pss-space-sm);
    font-size: 0.75rem;
    color: var(--pss-text-muted, var(--pss-gray-500));
}

.dataset-meta span {
    display: flex;
    align-items: center;
    gap: 3px;
}

.dataset-actions {
    display: flex;
    gap: var(--pss-space-xs);
}

.dataset-actions .btn {
    padding: 4px 8px;
    font-size: 0.7rem;
}

/* 空状态 */
.pss-empty-dataset {
    text-align: center;
    padding: var(--pss-space-xl);
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    border: 2px dashed var(--pss-border);
    border-radius: var(--pss-radius-lg);
}

.pss-empty-dataset .empty-icon {
    font-size: 3rem;
    color: var(--pss-gray-300);
    margin-bottom: var(--pss-space-md);
}

.pss-empty-dataset h3 {
    font-size: 1.1rem;
    color: var(--pss-text);
    margin-bottom: var(--pss-space-xs);
}

.pss-empty-dataset p {
    font-size: 0.85rem;
    color: var(--pss-text-muted, var(--pss-gray-500));
    margin-bottom: var(--pss-space-md);
}

/* 右侧预览区域 */
.pss-preview-section {
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-lg);
    padding: var(--pss-space-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pss-preview-section .pss-section-header {
    flex-shrink: 0;
}

.preview-dataset-name {
    font-size: 0.85rem;
    color: var(--pss-primary);
    font-weight: 500;
    background: var(--pss-primary-light);
    padding: var(--pss-space-xs) var(--pss-space-sm);
    border-radius: var(--pss-radius-sm);
}

/* 数据表格 */
.pss-data-table-wrapper {
    flex: 1;
    overflow: auto;
    margin-bottom: var(--pss-space-md);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-md);
}

.pss-data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.pss-data-table th {
    background: var(--pss-primary-light);
    color: var(--pss-primary);
    font-weight: 600;
    padding: var(--pss-space-sm) var(--pss-space-md);
    text-align: left;
    position: sticky;
    top: 0;
    white-space: nowrap;
    border-bottom: 2px solid var(--pss-primary);
}

.pss-data-table td {
    padding: var(--pss-space-sm) var(--pss-space-md);
    border-bottom: 1px solid var(--pss-border);
    white-space: nowrap;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pss-data-table tr:hover td {
    background: var(--pss-gray-50);
}

.mode-dark .pss-data-table tr:hover td {
    background: rgba(255,255,255,0.05);
}

/* 变量卡片区域 */
.pss-variables-section {
    flex-shrink: 0;
    border-top: 1px solid var(--pss-border);
    padding-top: var(--pss-space-md);
}

.pss-variables-section h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0 0 var(--pss-space-sm);
    display: flex;
    align-items: center;
    gap: var(--pss-space-sm);
    color: var(--pss-text);
}

.pss-variables-section h3 i {
    color: var(--pss-secondary);
}

.pss-variable-cards {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pss-space-sm);
}

.pss-var-card {
    background: var(--pss-card-bg, white);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-md);
    padding: var(--pss-space-sm) var(--pss-space-md);
    min-width: 140px;
    transition: var(--pss-transition);
}

.pss-var-card:hover {
    border-color: var(--pss-primary);
    box-shadow: var(--pss-shadow-sm);
}

.var-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--pss-space-sm);
    margin-bottom: var(--pss-space-xs);
}

.var-name {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--pss-text);
}

.var-type {
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: var(--pss-radius-sm);
    font-weight: 500;
}

.var-type.continuous {
    background: var(--pss-primary-light);
    color: var(--pss-primary);
}

.var-type.categorical {
    background: var(--pss-secondary-light);
    color: var(--pss-secondary);
}

.var-type.ordinal {
    background: var(--pss-accent-light);
    color: var(--pss-accent);
}

.var-label {
    font-size: 0.75rem;
    color: var(--pss-text-muted, var(--pss-gray-500));
    margin-bottom: var(--pss-space-xs);
}

.var-actions {
    display: flex;
    justify-content: flex-end;
}

.var-actions .btn {
    font-size: 0.7rem;
    padding: 2px 6px;
}

/* ==================== 上传模态框 ==================== */
.pss-upload-zone {
    border: 2px dashed var(--pss-border);
    border-radius: var(--pss-radius-lg);
    padding: var(--pss-space-xl);
    text-align: center;
    cursor: pointer;
    transition: var(--pss-transition);
    background: var(--pss-gray-50);
}

.pss-upload-zone:hover,
.pss-upload-zone.dragover {
    border-color: var(--pss-primary);
    background: var(--pss-primary-light);
}

.pss-upload-zone .upload-icon {
    font-size: 3rem;
    color: var(--pss-gray-400);
    margin-bottom: var(--pss-space-md);
}

.pss-upload-zone:hover .upload-icon {
    color: var(--pss-primary);
}

.pss-upload-zone .upload-text {
    font-size: 1rem;
    color: var(--pss-text);
    margin-bottom: var(--pss-space-xs);
}

.pss-upload-zone .upload-hint {
    font-size: 0.85rem;
    color: var(--pss-text-muted, var(--pss-gray-500));
    margin-bottom: var(--pss-space-md);
}

/* 文件已选择状态 */
.pss-upload-zone.has-file {
    border-color: var(--pss-success);
    background: rgba(16, 185, 129, 0.1);
}

.pss-upload-zone.has-file .upload-icon {
    color: var(--pss-success);
}

.pss-upload-options {
    margin-top: var(--pss-space-lg);
    padding-top: var(--pss-space-md);
    border-top: 1px solid var(--pss-border);
}

.pss-upload-options h6 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--pss-space-sm);
    color: var(--pss-text);
}

.pss-upload-progress {
    text-align: center;
    padding: var(--pss-space-lg);
}

.pss-upload-progress .progress {
    height: 8px;
    border-radius: 4px;
    margin-bottom: var(--pss-space-sm);
}

.pss-upload-progress .progress-text {
    font-size: 0.85rem;
    color: var(--pss-text-muted);
}

/* ==================== 首页样式 ==================== */
.pss-welcome-bar {
    background: linear-gradient(135deg, var(--pss-primary) 0%, #1e40af 100%);
    color: white;
    padding: var(--pss-space-lg);
    border-radius: var(--pss-radius-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--pss-space-lg);
}

.mode-scifi .pss-welcome-bar {
    background: linear-gradient(135deg, rgba(0, 243, 255, 0.1) 0%, rgba(0, 100, 150, 0.2) 100%);
    border: 1px solid rgba(0, 243, 255, 0.3);
}

.pss-welcome-text h1 {
    font-size: 1.3rem;
    margin-bottom: var(--pss-space-xs);
}

.pss-welcome-text p {
    opacity: 0.9;
    margin: 0;
    font-size: 0.9rem;
}

/* 项目网格 */
.pss-project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--pss-space-md);
}

.pss-project-card {
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-lg);
    padding: var(--pss-space-md);
    display: flex;
    gap: var(--pss-space-md);
    align-items: flex-start;
    transition: var(--pss-transition);
    cursor: pointer;
}

.pss-project-card:hover {
    box-shadow: var(--pss-shadow-lg);
    border-color: var(--pss-primary);
    transform: translateY(-2px);
}

.pss-project-info { 
    flex: 1; 
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--pss-space-xs);
}

.pss-project-name {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0;
    color: var(--pss-text);
    line-height: 1.3;
}

.pss-project-desc {
    font-size: 0.8rem;
    color: var(--pss-text-muted, var(--pss-gray-500));
    margin: 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.pss-project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pss-space-sm);
    font-size: 0.7rem;
    color: var(--pss-gray-400);
    line-height: 1.4;
    margin-bottom: var(--pss-space-xs);
}

.pss-project-meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
}

.pss-project-meta span i {
    font-size: 0.75rem;
    opacity: 0.8;
}

.pss-project-actions {
    display: flex;
    flex-direction: column;
    gap: var(--pss-space-xs);
    flex-shrink: 0;
}

.pss-project-actions .btn {
    font-size: 0.75rem;
    padding: 0.35rem 0.65rem;
    white-space: nowrap;
}

.pss-project-actions .btn i {
    font-size: 0.7rem;
}

/* 新建项目卡片 */
.pss-project-new {
    border: 2px dashed var(--pss-border);
    background: transparent;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

.pss-project-new:hover {
    border-color: var(--pss-primary);
    background: var(--pss-primary-light);
}

.pss-new-icon {
    width: 44px;
    height: 44px;
    background: var(--pss-gray-200);
    color: var(--pss-gray-500);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: var(--pss-space-sm);
}

.pss-project-new:hover .pss-new-icon {
    background: var(--pss-primary);
    color: white;
}

/* ==================== 按钮样式增强 ==================== */
.btn-modern {
    border-radius: var(--pss-radius-md);
    font-weight: 500;
    transition: var(--pss-transition);
}

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

/* ==================== 分析工作台 ==================== */
.pss-analyze-page {
    display: grid;
    grid-template-columns: 280px 1fr 300px;
    gap: var(--pss-space-lg);
    min-height: 600px;
}

/* ==================== 结果中心 ==================== */
.pss-results-page {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--pss-space-lg);
    min-height: 600px;
}

.pss-results-sidebar {
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-lg);
    padding: var(--pss-space-md);
}

.pss-results-main {
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-lg);
    padding: var(--pss-space-lg);
}

.pss-analysis-card {
    display: flex;
    align-items: center;
    gap: var(--pss-space-md);
    padding: var(--pss-space-md);
    background: var(--pss-card-bg, white);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-md);
    margin-bottom: var(--pss-space-sm);
    cursor: pointer;
    transition: var(--pss-transition);
}

.pss-analysis-card:hover {
    border-color: var(--pss-primary);
    box-shadow: var(--pss-shadow-sm);
}

/* ==================== Toast消息 ==================== */
.pss-toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
}

.pss-toast {
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-md);
    padding: var(--pss-space-md);
    margin-bottom: var(--pss-space-sm);
    box-shadow: var(--pss-shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--pss-space-sm);
    max-width: 360px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.pss-toast.success { border-left: 4px solid var(--pss-success); }
.pss-toast.error { border-left: 4px solid var(--pss-error); }
.pss-toast.warning { border-left: 4px solid var(--pss-warning); }
.pss-toast.info { border-left: 4px solid var(--pss-info); }

/* ==================== 响应式 ==================== */
@media (max-width: 992px) {
    .pss-data-page,
    .pss-analyze-page,
    .pss-results-page {
        grid-template-columns: 1fr;
    }
    
    .pss-data-section {
        order: 2;
    }
    
    .pss-preview-section {
        order: 1;
        max-height: 400px;
    }
}

@media (max-width: 768px) {
    .pss-header { padding: 0 var(--pss-space-md); height: 50px; }
    .pss-nav { display: none; }
    .pss-main { padding: var(--pss-space-md); }
    .pss-project-grid { grid-template-columns: 1fr; }
    .pss-welcome-bar { flex-direction: column; text-align: center; gap: var(--pss-space-md); }
}

/* ==================== Landing页面（未登录首页） ==================== */
.pss-landing {
    max-width: 1200px;
    margin: 0 auto;
}

/* Hero区域 */
.pss-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--pss-space-xl);
    align-items: center;
    padding: var(--pss-space-xl) 0;
    min-height: 400px;
}

.pss-hero-content {
    padding: var(--pss-space-lg);
}

.pss-hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--pss-space-md);
    background: linear-gradient(135deg, var(--pss-primary) 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pss-hero-subtitle {
    font-size: 1.5rem;
    color: var(--pss-text);
    margin-bottom: var(--pss-space-sm);
    font-weight: 600;
}

.pss-hero-desc {
    font-size: 1rem;
    color: var(--pss-text-muted, var(--pss-gray-500));
    margin-bottom: var(--pss-space-lg);
}

.pss-hero-actions {
    display: flex;
    gap: var(--pss-space-md);
    flex-wrap: wrap;
}

.pss-hero-actions .btn {
    padding: var(--pss-space-md) var(--pss-space-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--pss-radius-lg);
}

.pss-hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.pss-demo-chart {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--pss-primary-light) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: var(--pss-primary);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* 快速体验区域 */
.pss-quick-start {
    padding: var(--pss-space-xl) 0;
    text-align: center;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--pss-text);
    margin-bottom: var(--pss-space-sm);
}

.section-desc {
    font-size: 1rem;
    color: var(--pss-text-muted, var(--pss-gray-500));
    margin-bottom: var(--pss-space-xl);
}

.pss-quick-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--pss-space-lg);
}

.pss-quick-card {
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-lg);
    padding: var(--pss-space-xl);
    text-align: center;
    cursor: pointer;
    transition: var(--pss-transition);
}

.pss-quick-card:hover {
    border-color: var(--pss-primary);
    box-shadow: var(--pss-shadow-lg);
    transform: translateY(-4px);
}

.pss-quick-card .card-icon {
    width: 64px;
    height: 64px;
    background: var(--pss-primary-light);
    color: var(--pss-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin: 0 auto var(--pss-space-md);
}

.pss-quick-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--pss-text);
    margin-bottom: var(--pss-space-xs);
}

.pss-quick-card p {
    font-size: 0.85rem;
    color: var(--pss-text-muted, var(--pss-gray-500));
    margin: 0;
}

/* 功能特色区域 */
.pss-features {
    padding: var(--pss-space-xl) 0;
    text-align: center;
}

.pss-feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--pss-space-lg);
}

.pss-feature-card {
    background: var(--pss-glass-bg);
    backdrop-filter: var(--pss-glass-blur);
    border: 1px solid var(--pss-border);
    border-radius: var(--pss-radius-lg);
    padding: var(--pss-space-lg);
    text-align: center;
    transition: var(--pss-transition);
}

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

.pss-feature-card .feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--pss-primary) 0%, #8b5cf6 100%);
    color: white;
    border-radius: var(--pss-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto var(--pss-space-md);
}

.pss-feature-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--pss-text);
    margin-bottom: var(--pss-space-xs);
}

.pss-feature-card p {
    font-size: 0.8rem;
    color: var(--pss-text-muted, var(--pss-gray-500));
    margin: 0;
    line-height: 1.5;
}

/* 支持的方法区域 */
.pss-methods {
    padding: var(--pss-space-xl) 0;
    text-align: center;
}

.pss-method-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--pss-space-sm);
}

.method-tag {
    background: var(--pss-glass-bg);
    border: 1px solid var(--pss-border);
    padding: var(--pss-space-sm) var(--pss-space-lg);
    border-radius: var(--pss-radius-lg);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--pss-text);
    transition: var(--pss-transition);
}

.method-tag:hover {
    background: var(--pss-primary-light);
    border-color: var(--pss-primary);
    color: var(--pss-primary);
}

/* CTA区域 */
.pss-cta {
    padding: var(--pss-space-xl);
    text-align: center;
    background: linear-gradient(135deg, var(--pss-primary) 0%, #8b5cf6 100%);
    border-radius: var(--pss-radius-xl);
    color: white;
    margin: var(--pss-space-xl) 0;
}

.pss-cta h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: var(--pss-space-sm);
}

.pss-cta p {
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: var(--pss-space-lg);
}

.pss-cta .btn {
    background: white;
    color: var(--pss-primary);
    font-weight: 600;
    padding: var(--pss-space-md) var(--pss-space-xl);
    border-radius: var(--pss-radius-lg);
}

.pss-cta .btn:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
}

/* Landing响应式 */
@media (max-width: 992px) {
    .pss-hero {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .pss-hero-visual {
        order: -1;
    }
    
    .pss-demo-chart {
        width: 200px;
        height: 200px;
        font-size: 5rem;
    }
    
    .pss-hero-actions {
        justify-content: center;
    }
    
    .pss-quick-cards {
        grid-template-columns: 1fr;
    }
    
    .pss-feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .pss-hero-title {
        font-size: 2rem;
    }
    
    .pss-hero-subtitle {
        font-size: 1.2rem;
    }
    
    .pss-feature-grid {
        grid-template-columns: 1fr;
    }
    
    .pss-hero-actions {
        flex-direction: column;
    }
    
    .pss-hero-actions .btn {
        width: 100%;
    }
}