:root{--primary: #7C3AED;--primary-hover: #6D28D9;--primary-light: #F5F3FF;--success: #22C55E;--success-hover: #16A34A;--danger: #EF4444;--danger-hover: #DC2626;--warning: #F59E0B;--warning-hover: #D97706;--bg: #F5F3FF;--bg-elevated: #FFFFFF;--bg-hover: #FAFAFE;--border: #E5E7EB;--border-strong: #D1D5DB;--text: #1E1B4B;--text-secondary: #6B7280;--text-muted: #9CA3AF;--radius-sm: 6px;--radius: 8px;--radius-lg: 12px;--shadow-sm: 0 1px 3px rgba(124,58,237,.04);--shadow: 0 1px 3px rgba(124,58,237,.06), 0 1px 2px rgba(124,58,237,.04);--shadow-lg: 0 10px 24px rgba(124,58,237,.12)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,Noto Sans SC,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--bg);color:var(--text);min-width:1200px;overflow-x:auto}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier 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var(--qc-ease);gap:8px;text-align:center}.qc-source-card:hover{border-color:var(--qc-accent);box-shadow:var(--qc-shadow-sm);transform:translateY(-2px)}.qc-source-card--active{border-color:var(--qc-accent);background:var(--qc-accent-light);box-shadow:var(--qc-shadow-sm)}.qc-source-card-icon{width:40px;height:40px;object-fit:contain}.qc-source-card-title{font-size:15px;font-weight:600;color:var(--qc-text-primary)}.qc-source-card-desc{font-size:12px;color:var(--qc-text-secondary);line-height:1.4}.qc-doc-import{background:var(--qc-surface);border:1px solid var(--qc-border);border-radius:var(--qc-radius-md);padding:var(--qc-space-lg);box-shadow:var(--qc-shadow-xs)}.qc-doc-import-title{font-size:14px;font-weight:600;color:var(--qc-text-primary);margin-bottom:4px}.qc-doc-import-subtitle{font-size:12px;color:var(--qc-text-muted);margin-bottom:var(--qc-space-md)}.qc-doc-import-methods{display:flex;gap:0;margin-bottom:var(--qc-space-md);border:1px solid 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