diff --git a/frontend/cypress/e2e/responsive.cy.js b/frontend/cypress/e2e/responsive.cy.js
index 8cc5689..04efa25 100644
--- a/frontend/cypress/e2e/responsive.cy.js
+++ b/frontend/cypress/e2e/responsive.cy.js
@@ -39,6 +39,75 @@ describe('Responsive Design', () => {
     })
   })
 
+  describe('Mobile edit recipe overlay (375x667)', () => {
+    let adminToken
+
+    before(() => {
+      cy.getAdminToken().then(token => { adminToken = token })
+    })
+
+    beforeEach(() => {
+      cy.viewport(375, 667)
+      cy.visit('/manage', {
+        onBeforeLoad(win) {
+          win.localStorage.setItem('oil_auth_token', adminToken)
+        }
+      })
+      cy.get('.recipe-manager', { timeout: 10000 }).should('exist')
+      cy.contains('公共配方库', { timeout: 10000 }).should('be.visible').click()
+      cy.get('.recipe-row', { timeout: 10000 }).should('have.length.gte', 1)
+      cy.get('.recipe-row .row-info').first().click()
+      cy.get('.overlay-panel', { timeout: 5000 }).should('be.visible')
+    })
+
+    it('editor table fits within panel without horizontal overflow', () => {
+      cy.get('.overlay-panel').then($panel => {
+        const panel = $panel[0]
+        expect(panel.scrollWidth, 'panel has no horizontal overflow')
+          .to.be.lte(panel.clientWidth + 1)
+      })
+      cy.get('.overlay-panel .editor-table').then($table => {
+        const tableRect = $table[0].getBoundingClientRect()
+        const panelRect = Cypress.$('.overlay-panel')[0].getBoundingClientRect()
+        expect(tableRect.right, 'table right edge').to.be.lte(panelRect.right + 1)
+        expect(tableRect.left, 'table left edge').to.be.gte(panelRect.left - 1)
+      })
+    })
+
+    it('all 4 data column headers (成分/用量/单价/小计) are visible in panel', () => {
+      const headers = ['成分', '用量', '单价', '小计']
+      headers.forEach(label => {
+        cy.get('.overlay-panel .editor-table thead th').contains(label).then($th => {
+          const thRect = $th[0].getBoundingClientRect()
+          const panelRect = Cypress.$('.overlay-panel')[0].getBoundingClientRect()
+          expect(thRect.right, `${label} header right`).to.be.lte(panelRect.right + 1)
+          expect(thRect.left, `${label} header left`).to.be.gte(panelRect.left - 1)
+        })
+      })
+    })
+
+    it('oil search input does not push the row past panel edge', () => {
+      cy.get('.overlay-panel .form-select').first().then($input => {
+        const inputRect = $input[0].getBoundingClientRect()
+        const panelRect = Cypress.$('.overlay-panel')[0].getBoundingClientRect()
+        expect(inputRect.right, 'oil input right').to.be.lte(panelRect.right + 1)
+      })
+    })
+
+    it('horizontal swipe does not switch tabs while editor overlay is open', () => {
+      cy.get('.nav-tab.active').invoke('text').then(activeBefore => {
+        // Overlay covers .main — touch events bubble from .overlay up to .main's handler
+        cy.get('.overlay')
+          .trigger('touchstart', { touches: [{ clientX: 320, clientY: 400 }], force: true })
+          .trigger('touchmove', { touches: [{ clientX: 60, clientY: 400 }], force: true })
+          .trigger('touchend', { force: true })
+        cy.wait(200)
+        cy.get('.overlay-panel').should('be.visible')
+        cy.get('.nav-tab.active').invoke('text').should('eq', activeBefore)
+      })
+    })
+  })
+
   describe('Tablet viewport (768x1024)', () => {
     beforeEach(() => {
       cy.viewport(768, 1024)