:root{--c-primary: #6366F1;--c-primary-hover: #4F46E5;--c-primary-soft: #EEF2FF;--c-primary-glow: rgba(99, 102, 241, .15);--c-bg: #F7F6F3;--c-surface: #FFFFFF;--c-text: #1C1917;--c-text-2: #57534E;--c-text-3: #78716C;--c-border: rgba(0, 0, 0, .07);--c-border-hover: rgba(0, 0, 0, .14);--c-success: #059669;--c-success-soft: #ECFDF5;--c-error: #DC2626;--c-error-soft: #FEF2F2;--font: -apple-system, "SF Pro Text", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;--font-display: -apple-system, "SF Pro Display", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;--r-sm: 6px;--r-md: 10px;--r-lg: 16px;--r-xl: 20px;--shadow-sm: 0 1px 2px rgba(0,0,0,.04);--shadow-card: 0 1px 3px rgba(0,0,0,.04), 0 4px 14px rgba(0,0,0,.05);--ease: cubic-bezier(.4, 0, .2, 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var(--c-primary-glow),var(--shadow-card)}.drop-zone--loading{pointer-events:none;opacity:.6}.drop-zone-content{display:flex;flex-direction:column;align-items:center;gap:16px}.dz-icon{color:var(--c-text-3);transition:color .25s var(--ease)}.drop-zone:hover .dz-icon{color:var(--c-primary)}.dz-text{font-size:15px;font-weight:600;color:var(--c-text);letter-spacing:-.2px}.dz-hint{font-size:13px;color:var(--c-text-3)}.loading-spinner{width:28px;height:28px;border:2.5px solid var(--c-border);border-top-color:var(--c-primary);border-radius:50%;animation:spin .7s linear infinite}.upload-error{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--c-error-soft);border:1px solid #FECACA;border-radius:var(--r-md);font-size:14px;color:#991b1b;max-width:460px;width:100%}.upload-footnote{font-size:12px;color:var(--c-text-3);text-align:center;max-width:460px;width:100%}.config-layout{display:flex;gap:24px;align-items:flex-start}.config-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:16px}.config-sidebar{width:280px;flex-shrink:0;position:sticky;top:20px}.config-form{background:var(--c-surface);border-radius:var(--r-lg);padding:24px;display:flex;flex-direction:column;gap:24px;box-shadow:0 1px 4px #0000000d,0 4px 14px #0000000a}.form-field{display:flex;flex-direction:column;gap:8px}.form-label{font-size:13px;font-weight:600;color:var(--c-text-2);letter-spacing:-.1px}.form-label--step{font-size:16px;font-weight:700;color:var(--c-primary);font-family:var(--font-display);letter-spacing:-.3px}.form-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.form-input{width:200px;padding:8px 12px;border:1.5px solid var(--c-border);border-radius:var(--r-md);font-size:14px;font-family:var(--font);color:var(--c-text);outline:none;background:#fafaf8;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s}.form-input:focus{border-color:var(--c-primary);background:var(--c-surface);box-shadow:0 0 0 3px var(--c-primary-glow)}.form-input::placeholder{color:var(--c-text-3)}.form-input--empty{border-color:#f87171}.form-input--empty:focus{border-color:#ef4444;box-shadow:0 0 0 3px #ef44441f}.form-required{color:#ef4444;margin-left:2px;font-weight:400}.form-hint{font-size:12px;color:var(--c-text-3)}.form-hint--warn{color:#ef4444}.form-hint--error{color:#ef4444;font-weight:500}.form-hint--ok{color:var(--c-success);font-weight:500}.form-input--ok{border-color:var(--c-success)}.form-input--error{border-color:#ef4444}.form-input--error:focus{border-color:#ef4444;box-shadow:0 0 0 3px 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var(--c-border);animation:fadeIn .2s var(--ease) both}.dc-table-wrap{overflow-x:auto;max-height:200px;overflow-y:auto}.dc-table{width:100%;border-collapse:collapse;font-size:12px;white-space:nowrap}.dc-table th{padding:8px 14px;background:#fafaf8;font-weight:600;color:var(--c-text-2);text-align:left;border-bottom:1px solid var(--c-border);position:sticky;top:0;z-index:1}.dc-table td{padding:8px 14px;border-bottom:1px solid rgba(0,0,0,.03);color:var(--c-text)}.dc-table tr:hover td{background:#fafaf8}.dc-bottom{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;background:#fafaf8;border-top:1px solid var(--c-border)}.dc-bottom-text{font-size:12px;color:var(--c-text-3)}.dc-mapping{padding:14px 20px;background:#fafaf8;display:flex;flex-direction:column;gap:10px;border-top:1px solid 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td{background:#fafaf8}.cell-script{color:var(--c-primary);font-weight:500}.cell-empty{color:var(--c-text-3)}.preview-empty{text-align:center;padding:32px 16px;color:var(--c-text-3)}.preview-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:8px}.dl-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:100}.dl-dialog{background:var(--c-surface);border-radius:var(--r-lg);padding:28px 32px;max-width:440px;width:90%;box-shadow:0 20px 60px #0003}.dl-dialog-title{font-size:18px;font-weight:700;color:var(--c-text);font-family:var(--font-display);margin-bottom:12px}.dl-dialog-text{font-size:14px;color:var(--c-text-2);margin-bottom:8px}.dl-dialog-path{display:block;background:#0000000a;padding:10px 14px;border-radius:var(--r-md);font-family:Consolas,Courier 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