diff --git a/package.json b/package.json
index 76422b1..c38542c 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
+    "test": "node --test",
     "prebuild": "npm run check:template-sync",
     "build": "vite build",
     "build:pages": "npm run check:template-sync && vite build --base=/OpenBox3D/",
diff --git a/src/design/layers.js b/src/design/layers.js
index 54f43e9..94d3bcd 100644
--- a/src/design/layers.js
+++ b/src/design/layers.js
@@ -19,8 +19,15 @@ export function bboxOf(l) {
 }
 
 export function dpiOf(l) {
-  if (l.kind !== 'image' || !l.pxw) return 0;
-  return Math.round(l.pxw / (l.w / 25.4));
+  if (l.kind !== 'image') return 0;
+  const pxw = Number(l.pxw || l.imgW), pxh = Number(l.imgH);
+  const w = Number(l.w), h = Number(l.h);
+  const crop = Array.isArray(l.crop) ? l.crop : [0, 0, 1, 1];
+  const cropW = Number(crop[2]), cropH = Number(crop[3]);
+  if (![pxw, pxh, w, h, cropW, cropH].every(v => Number.isFinite(v) && v > 0)) return 0;
+  const dpiX = pxw * cropW / (w / 25.4);
+  const dpiY = pxh * cropH / (h / 25.4);
+  return Math.round(Math.min(dpiX, dpiY));
 }
 
 // 图集 UV 用：每个面板（fill 多边形）的包围盒，供 3D 与导出对齐
diff --git a/src/ui/StructureView.jsx b/src/ui/StructureView.jsx
index de27ca3..7bd5263 100644
--- a/src/ui/StructureView.jsx
+++ b/src/ui/StructureView.jsx
@@ -37,7 +37,14 @@ export function StructureView() {
     { k: '含出血', v: fmt(sw + 2 * s.bleed) + ' × ' + fmt(sh + 2 * s.bleed) },
     { k: '纸厚 t', v: t + ' mm' }
   ].concat(specTpl[s.tpl] || []);
-  const checks = ['外轮廓闭合', '无自交 / 孤立线段', '最小刀距 ≥ 1.5 mm', '压痕两侧均有连接面', '出血 ≥ ' + m.bleed + ' mm（' + m.note + '）'];
+  const bleedOk = s.bleed >= m.bleed;
+  const checks = [
+    { label: '外轮廓闭合：未自动检测', dot: '#9a8f7e' },
+    { label: '自交 / 孤立线段：未自动检测', dot: '#9a8f7e' },
+    { label: '最小刀距 ≥ 1.5 mm：未自动检测', dot: '#9a8f7e' },
+    { label: '压痕两侧均有连接面：未自动检测', dot: '#9a8f7e' },
+    { label: '出血 ' + s.bleed + ' mm ' + (bleedOk ? '≥' : '<') + ' 材质建议 ' + m.bleed + ' mm（' + m.note + '）', dot: bleedOk ? '#3f9e5f' : '#d05a2a' }
+  ];
   const compNote = s.tpl === 'rte' || s.tpl === 'ste' ? '当前：W+t · L+t · W+t · L+2t，高度 H+t' : s.tpl === 'mailer' ? '当前：楞厚 t=' + t + '，侧墙 H+t，盖宽 W+3t' : s.tpl === 'cyl' ? '当前：直径 D=L，筒身 24 段卷合，盖为 24 边形' : s.tpl === 'hex' ? '当前：边长 W，六棱筒，盖为正六边形' : '当前：盖/套筒按 +1mm/边 放量';
   const editOn = s.editMode;
   const typeOvrCount = Object.keys(s.typeOvr).length;
@@ -123,8 +130,8 @@ export function StructureView() {
       <div style={{ padding: 14 }}>
         <ST>校验</ST>
         {checks.map(c => (
-          <div key={c} style={{ display: 'flex', alignItems: 'center', gap: 8, padding: '4px 0', fontSize: 12, color: '#3d3830' }}>
-            <div style={{ width: 6, height: 6, borderRadius: 99, background: '#3f9e5f', flex: 'none' }} />{c}
+          <div key={c.label} style={{ display: 'flex', alignItems: 'center', gap: 8, padding: '4px 0', fontSize: 12, color: '#3d3830' }}>
+            <div style={{ width: 6, height: 6, borderRadius: 99, background: c.dot, flex: 'none' }} />{c.label}
           </div>
         ))}
       </div>
diff --git a/test/layers.test.js b/test/layers.test.js
new file mode 100644
index 0000000..194b12a
--- /dev/null
+++ b/test/layers.test.js
@@ -0,0 +1,33 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { dpiOf } from '../src/design/layers.js';
+
+const imageLayer = overrides => ({
+  kind: 'image',
+  imgW: 600,
+  imgH: 300,
+  pxw: 600,
+  w: 50.8,
+  h: 25.4,
+  ...overrides
+});
+
+test('dpiOf uses both full-image dimensions when no crop is set', () => {
+  assert.equal(dpiOf(imageLayer()), 300);
+});
+
+test('dpiOf returns the lower DPI after non-uniform scaling', () => {
+  assert.equal(dpiOf(imageLayer({ h: 50.8 })), 150);
+});
+
+test('dpiOf uses the cropped pixel dimensions on both axes', () => {
+  const cropped = { imgW: 4000, imgH: 2000, pxw: 4000, crop: [0.1, 0.2, 0.5, 0.25] };
+  assert.equal(dpiOf(imageLayer({ ...cropped, w: 127, h: 25.4 })), 400);
+  assert.equal(dpiOf(imageLayer({ ...cropped, w: 101.6, h: 50.8 })), 250);
+});
+
+test('dpiOf returns zero for non-image layers or missing dimensions', () => {
+  assert.equal(dpiOf({ kind: 'text', pxw: 600, w: 50.8 }), 0);
+  assert.equal(dpiOf({ kind: 'image', pxw: 600, w: 50.8 }), 0);
+  assert.equal(dpiOf({ kind: 'image', pxw: 600, w: 0, h: 25.4 }), 0);
+});