diff --git a/bible-local/02-architecture.md b/bible-local/02-architecture.md
index 5af8428..a71e29e 100644
--- a/bible-local/02-architecture.md
+++ b/bible-local/02-architecture.md
@@ -48,6 +48,32 @@ Rules:
 - latest pricelist selection ignores snapshots without items;
 - auto pricelist mode stays auto and must not be persisted as an explicit resolved ID.
 
+## Pricing tab layout
+
+The Pricing tab (Ценообразование) has two tables: Buy (Цена покупки) and Sale (Цена продажи).
+
+Column order (both tables):
+
+```
+PN вендора | Описание | LOT | Кол-во | Estimate | Склад | Конкуренты | Ручная цена
+```
+
+Per-LOT row expansion rules:
+- each `lot_mappings` entry in a BOM row becomes its own table row with its own quantity and prices;
+- `baseLot` (resolved LOT without an explicit mapping) is treated as the first sub-row with `quantity_per_pn` from `_getRowLotQtyPerPN`;
+- when one vendor PN expands into N LOT sub-rows, PN вендора and Описание cells use `rowspan="N"` and appear only on the first sub-row;
+- a visual top border (`border-t border-gray-200`) separates each vendor PN group.
+
+Vendor price attachment:
+- `vendorOrig` and `vendorOrigUnit` (BOM unit/total price) are attached to the first LOT sub-row only;
+- subsequent sub-rows carry empty `data-vendor-orig` so `setPricingCustomPriceFromVendor` counts each vendor PN exactly once.
+
+Controls terminology:
+- custom price input is labeled **Ручная цена** (not "Своя цена");
+- the button that fills custom price from BOM totals is labeled **BOM Цена** (not "Проставить цены BOM").
+
+CSV export reads PN вендора, Описание, and LOT from `data-vendor-pn`, `data-desc`, `data-lot` row attributes to bypass the rowspan cell offset problem.
+
 ## Configuration versioning
 
 Configuration revisions are append-only snapshots stored in `local_configuration_versions`.
diff --git a/web/templates/index.html b/web/templates/index.html
index 70f2484..fc58cb1 100644
--- a/web/templates/index.html
+++ b/web/templates/index.html
@@ -211,9 +211,9 @@
                 <table class="w-full text-sm border-collapse">
                     <thead class="bg-gray-50 text-gray-700">
                         <tr>
-                            <th class="px-3 py-2 text-left border-b">LOT</th>
                             <th class="px-3 py-2 text-left border-b">PN вендора</th>
                             <th class="px-3 py-2 text-left border-b">Описание</th>
+                            <th class="px-3 py-2 text-left border-b">LOT</th>
                             <th class="px-3 py-2 text-right border-b">Кол-во</th>
                             <th class="px-3 py-2 text-right border-b">Estimate</th>
                             <th class="px-3 py-2 text-right border-b">Склад</th>
@@ -236,12 +236,12 @@
                 </table>
             </div>
             <div class="mt-4 flex flex-wrap items-center gap-4">
-                <label class="text-sm font-medium text-gray-700">Своя цена:</label>
+                <label class="text-sm font-medium text-gray-700">Ручная цена:</label>
                 <input type="number" id="pricing-custom-price-buy" step="0.01" min="0" placeholder="0.00"
                        class="w-40 px-3 py-2 border rounded focus:ring-2 focus:ring-blue-500"
                        oninput="onBuyCustomPriceInput()">
                 <button onclick="setPricingCustomPriceFromVendor()" class="px-3 py-2 bg-gray-100 text-gray-700 rounded hover:bg-gray-200 border border-gray-300 text-sm">
-                    Проставить цены BOM
+                    BOM Цена
                 </button>
                 <button onclick="exportPricingCSV('buy')" class="px-3 py-2 bg-green-600 text-white rounded hover:bg-green-700 text-sm">
                     Экспорт CSV
@@ -260,9 +260,9 @@
                 <table class="w-full text-sm border-collapse">
                     <thead class="bg-gray-50 text-gray-700">
                         <tr>
-                            <th class="px-3 py-2 text-left border-b">LOT</th>
                             <th class="px-3 py-2 text-left border-b">PN вендора</th>
                             <th class="px-3 py-2 text-left border-b">Описание</th>
+                            <th class="px-3 py-2 text-left border-b">LOT</th>
                             <th class="px-3 py-2 text-right border-b">Кол-во</th>
                             <th class="px-3 py-2 text-right border-b">Estimate</th>
                             <th class="px-3 py-2 text-right border-b">Склад</th>
@@ -289,7 +289,7 @@
                 <input type="text" id="pricing-uplift-sale" inputmode="decimal" placeholder="1,3000"
                        class="w-28 px-3 py-2 border rounded focus:ring-2 focus:ring-blue-500"
                        oninput="onSaleMarkupInput()">
-                <label class="text-sm font-medium text-gray-700">Своя цена:</label>
+                <label class="text-sm font-medium text-gray-700">Ручная цена:</label>
                 <input type="number" id="pricing-custom-price-sale" step="0.01" min="0" placeholder="0.00"
                        class="w-40 px-3 py-2 border rounded focus:ring-2 focus:ring-blue-500"
                        oninput="onSaleCustomPriceInput()">
@@ -3609,6 +3609,7 @@ async function renderPricingTab() {
     });
 
     // ─── Build shared row data (unit prices for display, totals for math) ────
+    // Each BOM row is exploded into per-LOT sub-rows; grouped by vendor PN via groupStart/groupSize.
     const _buildRows = () => {
         const result = [];
         const coveredLots = new Set();
@@ -3618,7 +3619,8 @@ async function renderPricingTab() {
             const u  = _getUnitPrices(pl);
             const estUnit = u.estUnit > 0 ? u.estUnit : (item.unit_price || 0);
             result.push({
-                lotCell: escapeHtml(item.lot_name), vendorPN: null,
+                lotCell: escapeHtml(item.lot_name), lotText: item.lot_name,
+                vendorPN: null,
                 desc: (compMap[item.lot_name] || {}).description || '',
                 qty: item.quantity,
                 estUnit, warehouseUnit: u.warehouseUnit, competitorUnit: u.competitorUnit,
@@ -3626,6 +3628,7 @@ async function renderPricingTab() {
                 warehouse:  u.warehouseUnit  != null ? u.warehouseUnit  * item.quantity : null,
                 competitor: u.competitorUnit != null ? u.competitorUnit * item.quantity : null,
                 vendorOrig: null, vendorOrigUnit: null, isEstOnly,
+                groupStart: true, groupSize: 1,
             });
         };
 
@@ -3640,42 +3643,66 @@ async function renderPricingTab() {
             if (baseLot) coveredLots.add(baseLot);
             allocs.forEach(a => coveredLots.add(a.lot_name));
 
-            // Accumulate unit prices per 1 vendor PN (base + allocs)
-            let rowEstUnit = 0, rowWhUnit = 0, rowCompUnit = 0;
-            let hasEst = false, hasWh = false, hasComp = false;
-            if (baseLot) {
-                const u = _getUnitPrices(priceMap[baseLot]);
-                const lotQty = _getRowLotQtyPerPN(row);
-                if (u.estUnit > 0)           { rowEstUnit  += u.estUnit  * lotQty; hasEst  = true; }
-                if (u.warehouseUnit  != null) { rowWhUnit   += u.warehouseUnit  * lotQty; hasWh   = true; }
-                if (u.competitorUnit != null) { rowCompUnit += u.competitorUnit * lotQty; hasComp = true; }
-            }
-            allocs.forEach(a => {
-                const u = _getUnitPrices(priceMap[a.lot_name]);
-                if (u.estUnit > 0)           { rowEstUnit  += u.estUnit  * a.quantity; hasEst  = true; }
-                if (u.warehouseUnit  != null) { rowWhUnit   += u.warehouseUnit  * a.quantity; hasWh   = true; }
-                if (u.competitorUnit != null) { rowCompUnit += u.competitorUnit * a.quantity; hasComp = true; }
-            });
-
-            let lotCell = '<span class="text-red-500">н/д</span>';
-            if (baseLot && allocs.length)    lotCell = `${escapeHtml(baseLot)} <span class="text-gray-400">+${allocs.length}</span>`;
-            else if (baseLot)                lotCell = escapeHtml(baseLot);
-            else if (allocs.length)          lotCell = `${escapeHtml(allocs[0].lot_name)}${allocs.length > 1 ? ` <span class="text-gray-400">+${allocs.length - 1}</span>` : ''}`;
-
             const vendorOrigUnit = row.unit_price != null ? row.unit_price
                 : (row.total_price != null && row.quantity > 0 ? row.total_price / row.quantity : null);
             const vendorOrig = row.total_price != null ? row.total_price
                 : (row.unit_price != null ? row.unit_price * row.quantity : null);
             const desc = row.description || (baseLot ? ((compMap[baseLot] || {}).description || '') : '');
-            result.push({
-                lotCell, vendorPN: row.vendor_pn, desc, qty: row.quantity,
-                estUnit: hasEst ? rowEstUnit : 0,
-                warehouseUnit:  hasWh   ? rowWhUnit   : null,
-                competitorUnit: hasComp ? rowCompUnit : null,
-                est:        hasEst  ? rowEstUnit  * row.quantity : 0,
-                warehouse:  hasWh   ? rowWhUnit   * row.quantity : null,
-                competitor: hasComp ? rowCompUnit * row.quantity : null,
-                vendorOrig, vendorOrigUnit, isEstOnly: false,
+
+            // Build per-LOT sub-rows
+            const subRows = [];
+            if (baseLot) {
+                const u = _getUnitPrices(priceMap[baseLot]);
+                const lotQty = _getRowLotQtyPerPN(row);
+                const qty = row.quantity * lotQty;
+                subRows.push({
+                    lotCell: escapeHtml(baseLot), lotText: baseLot, qty,
+                    estUnit: u.estUnit > 0 ? u.estUnit : 0,
+                    warehouseUnit: u.warehouseUnit, competitorUnit: u.competitorUnit,
+                    est:        u.estUnit > 0 ? u.estUnit * qty : 0,
+                    warehouse:  u.warehouseUnit  != null ? u.warehouseUnit  * qty : null,
+                    competitor: u.competitorUnit != null ? u.competitorUnit * qty : null,
+                });
+            }
+            allocs.forEach(a => {
+                const u = _getUnitPrices(priceMap[a.lot_name]);
+                const qty = row.quantity * a.quantity;
+                subRows.push({
+                    lotCell: escapeHtml(a.lot_name), lotText: a.lot_name, qty,
+                    estUnit: u.estUnit > 0 ? u.estUnit : 0,
+                    warehouseUnit: u.warehouseUnit, competitorUnit: u.competitorUnit,
+                    est:        u.estUnit > 0 ? u.estUnit * qty : 0,
+                    warehouse:  u.warehouseUnit  != null ? u.warehouseUnit  * qty : null,
+                    competitor: u.competitorUnit != null ? u.competitorUnit * qty : null,
+                });
+            });
+
+            if (!subRows.length) {
+                result.push({
+                    lotCell: '<span class="text-red-500">н/д</span>', lotText: '',
+                    vendorPN: row.vendor_pn, desc, qty: row.quantity,
+                    estUnit: 0, warehouseUnit: null, competitorUnit: null,
+                    est: 0, warehouse: null, competitor: null,
+                    vendorOrig, vendorOrigUnit, isEstOnly: false,
+                    groupStart: true, groupSize: 1,
+                });
+                return;
+            }
+
+            const groupSize = subRows.length;
+            subRows.forEach((sub, idx) => {
+                result.push({
+                    lotCell: sub.lotCell, lotText: sub.lotText,
+                    vendorPN: row.vendor_pn, desc,
+                    qty: sub.qty,
+                    estUnit: sub.estUnit, warehouseUnit: sub.warehouseUnit, competitorUnit: sub.competitorUnit,
+                    est: sub.est, warehouse: sub.warehouse, competitor: sub.competitor,
+                    vendorOrig:     idx === 0 ? vendorOrig     : null,
+                    vendorOrigUnit: idx === 0 ? vendorOrigUnit : null,
+                    isEstOnly: false,
+                    groupStart: idx === 0,
+                    groupSize:  idx === 0 ? groupSize : 0,
+                });
             });
         });
 
@@ -3708,19 +3735,28 @@ async function renderPricingTab() {
             tr.dataset.qty = r.qty;
             tr.dataset.vendorOrig = r.vendorOrig != null ? r.vendorOrig : '';
             tr.dataset.vendorOrigUnit = r.vendorOrigUnit != null ? r.vendorOrigUnit : '';
+            tr.dataset.groupStart = r.groupStart ? 'true' : 'false';
+            tr.dataset.vendorPn = r.vendorPN || '';
+            tr.dataset.desc = r.desc;
+            tr.dataset.lot = r.lotText;
             if (r.est > 0)            { totEst    += r.est;        hasEst    = true; }
             if (r.warehouse  != null) { totWh     += r.warehouse;  hasWh     = true; cntWh++;  }
             if (r.competitor != null) { totComp   += r.competitor; hasComp   = true; cntComp++; }
             if (r.vendorOrig != null) { totVendor += r.vendorOrig; hasVendor = true; }
+            const borderTop = r.groupStart ? 'border-t border-gray-200' : '';
+            const pnDescHtml = r.groupStart ? (() => {
+                const rs = r.groupSize > 1 ? ` rowspan="${r.groupSize}"` : '';
+                return `<td${rs} class="px-3 py-1.5 font-mono text-xs border-t border-gray-200 align-top ${r.vendorPN == null ? 'text-gray-400' : ''}">${r.vendorPN != null ? escapeHtml(r.vendorPN) : '—'}</td>
+                <td${rs} class="px-3 py-1.5 text-xs text-gray-500 truncate max-w-xs border-t border-gray-200 align-top">${escapeHtml(r.desc)}</td>`;
+            })() : '';
             tr.innerHTML = `
-                <td class="px-3 py-1.5 text-xs">${r.lotCell}</td>
-                <td class="px-3 py-1.5 font-mono text-xs ${r.vendorPN == null ? 'text-gray-400' : ''}">${r.vendorPN != null ? escapeHtml(r.vendorPN) : '—'}</td>
-                <td class="px-3 py-1.5 text-xs text-gray-500 truncate max-w-xs">${escapeHtml(r.desc)}</td>
-                <td class="px-3 py-1.5 text-right text-xs">${r.qty}</td>
-                <td class="px-3 py-1.5 text-right text-xs">${r.estUnit > 0 ? formatCurrency(r.estUnit) : '—'}</td>
-                <td class="px-3 py-1.5 text-right text-xs">${r.warehouseUnit != null ? formatCurrency(r.warehouseUnit) : '—'}</td>
-                <td class="px-3 py-1.5 text-right text-xs">${r.competitorUnit != null ? formatCurrency(r.competitorUnit) : '—'}</td>
-                <td class="px-3 py-1.5 text-right text-xs pricing-vendor-price-buy ${r.vendorOrigUnit == null ? 'text-gray-400' : ''}">${r.vendorOrigUnit != null ? formatCurrency(r.vendorOrigUnit) : '—'}</td>
+                ${pnDescHtml}
+                <td class="px-3 py-1.5 text-xs ${borderTop}">${r.lotCell}</td>
+                <td class="px-3 py-1.5 text-right text-xs ${borderTop}">${r.qty}</td>
+                <td class="px-3 py-1.5 text-right text-xs ${borderTop}">${r.estUnit > 0 ? formatCurrency(r.estUnit) : '—'}</td>
+                <td class="px-3 py-1.5 text-right text-xs ${borderTop}">${r.warehouseUnit != null ? formatCurrency(r.warehouseUnit) : '—'}</td>
+                <td class="px-3 py-1.5 text-right text-xs ${borderTop}">${r.competitorUnit != null ? formatCurrency(r.competitorUnit) : '—'}</td>
+                <td class="px-3 py-1.5 text-right text-xs pricing-vendor-price-buy ${borderTop} ${r.vendorOrigUnit == null ? 'text-gray-400' : ''}">${r.vendorOrigUnit != null ? formatCurrency(r.vendorOrigUnit) : '—'}</td>
             `;
             tbodyBuy.appendChild(tr);
         });
@@ -3752,18 +3788,27 @@ async function renderPricingTab() {
             const saleCompTotal = saleCompUnit != null ? saleCompUnit * r.qty : null;
             tr.dataset.estSale = saleEstTotal;
             tr.dataset.qty = r.qty;
+            tr.dataset.groupStart = r.groupStart ? 'true' : 'false';
+            tr.dataset.vendorPn = r.vendorPN || '';
+            tr.dataset.desc = r.desc;
+            tr.dataset.lot = r.lotText;
             if (saleEstTotal  > 0)     { totEst  += saleEstTotal;  hasEst  = true; }
             if (saleWhTotal   != null) { totWh   += saleWhTotal;   hasWh   = true; cntWh++;  }
             if (saleCompTotal != null) { totComp += saleCompTotal; hasComp = true; cntComp++; }
+            const borderTop = r.groupStart ? 'border-t border-gray-200' : '';
+            const pnDescHtml = r.groupStart ? (() => {
+                const rs = r.groupSize > 1 ? ` rowspan="${r.groupSize}"` : '';
+                return `<td${rs} class="px-3 py-1.5 font-mono text-xs border-t border-gray-200 align-top ${r.vendorPN == null ? 'text-gray-400' : ''}">${r.vendorPN != null ? escapeHtml(r.vendorPN) : '—'}</td>
+                <td${rs} class="px-3 py-1.5 text-xs text-gray-500 truncate max-w-xs border-t border-gray-200 align-top">${escapeHtml(r.desc)}</td>`;
+            })() : '';
             tr.innerHTML = `
-                <td class="px-3 py-1.5 text-xs">${r.lotCell}</td>
-                <td class="px-3 py-1.5 font-mono text-xs ${r.vendorPN == null ? 'text-gray-400' : ''}">${r.vendorPN != null ? escapeHtml(r.vendorPN) : '—'}</td>
-                <td class="px-3 py-1.5 text-xs text-gray-500 truncate max-w-xs">${escapeHtml(r.desc)}</td>
-                <td class="px-3 py-1.5 text-right text-xs">${r.qty}</td>
-                <td class="px-3 py-1.5 text-right text-xs">${saleEstUnit  > 0    ? formatCurrency(saleEstUnit)  : '—'}</td>
-                <td class="px-3 py-1.5 text-right text-xs">${saleWhUnit   != null ? formatCurrency(saleWhUnit)   : '—'}</td>
-                <td class="px-3 py-1.5 text-right text-xs">${saleCompUnit != null ? formatCurrency(saleCompUnit) : '—'}</td>
-                <td class="px-3 py-1.5 text-right text-xs pricing-vendor-price-sale text-gray-400">—</td>
+                ${pnDescHtml}
+                <td class="px-3 py-1.5 text-xs ${borderTop}">${r.lotCell}</td>
+                <td class="px-3 py-1.5 text-right text-xs ${borderTop}">${r.qty}</td>
+                <td class="px-3 py-1.5 text-right text-xs ${borderTop}">${saleEstUnit  > 0    ? formatCurrency(saleEstUnit)  : '—'}</td>
+                <td class="px-3 py-1.5 text-right text-xs ${borderTop}">${saleWhUnit   != null ? formatCurrency(saleWhUnit)   : '—'}</td>
+                <td class="px-3 py-1.5 text-right text-xs ${borderTop}">${saleCompUnit != null ? formatCurrency(saleCompUnit) : '—'}</td>
+                <td class="px-3 py-1.5 text-right text-xs pricing-vendor-price-sale ${borderTop} text-gray-400">—</td>
             `;
             tbodySale.appendChild(tr);
         });
@@ -3961,12 +4006,25 @@ function exportPricingCSV(table) {
         return /[;"\n\r]/.test(s) ? `"${s}"` : s;
     };
 
-    const headers = ['Lot', 'PN вендора', 'Описание', 'Кол-во', 'Estimate', 'Склад', 'Конкуренты', 'Ручная цена'];
+    const headers = ['PN вендора', 'Описание', 'LOT', 'Кол-во', 'Estimate', 'Склад', 'Конкуренты', 'Ручная цена'];
     const lines = [headers.map(csvEscape).join(csvDelimiter)];
 
     rows.forEach(tr => {
+        // PN вендора, Описание, LOT are stored in dataset to handle rowspan correctly
+        const pn   = cleanExportCell(tr.dataset.vendorPn || '');
+        const desc = cleanExportCell(tr.dataset.desc || '');
+        const lot  = cleanExportCell(tr.dataset.lot || '');
+        // Qty..Ручная цена: cells at offset 2 for group-start rows, offset 0 for sub-rows
+        const isGroupStart = tr.dataset.groupStart === 'true';
         const cells = tr.querySelectorAll('td');
-        const cols = [0,1,2,3,4,5,6,7].map(i => cells[i] ? cleanExportCell(cells[i].textContent) : '');
+        const o = isGroupStart ? 2 : 0;
+        const cols = [pn, desc, lot,
+            cleanExportCell(cells[o]?.textContent),
+            cleanExportCell(cells[o+1]?.textContent),
+            cleanExportCell(cells[o+2]?.textContent),
+            cleanExportCell(cells[o+3]?.textContent),
+            cleanExportCell(cells[o+4]?.textContent),
+        ];
         lines.push(cols.map(csvEscape).join(csvDelimiter));
     });