diff --git a/src/views/demand/business-feasibility.vue b/src/views/demand/business-feasibility.vue
index c87e0c4..e4036b2 100644
--- a/src/views/demand/business-feasibility.vue
+++ b/src/views/demand/business-feasibility.vue
@@ -50,16 +50,18 @@
             <div class="table-wrap"><table><thead><tr><th>模块</th><th>案例公司的策略</th><th>说明</th></tr></thead><tbody><tr v-for="model in form.businessModels" :key="model.module"><td class="fixed-cell">{{ model.module }}</td><td><textarea v-model.trim="model.strategy" placeholder="填写渠道、产品组合或服务策略" /></td><td><textarea v-model.trim="model.explanation" placeholder="说明策略与用户、成本的关系" /></td></tr></tbody></table></div>
           </section>
 
-          <section class="form-section cost-section">
-            <div class="section-title"><span>05</span><div><h3>成本结构、定价与毛利</h3><p>单位总成本、单位毛利和毛利率由系统自动汇总；毛利率按照原型公式“单位毛利 ÷ 单位总成本”计算。</p></div></div>
-            <div class="cost-layout">
-              <div class="table-wrap"><table><thead><tr><th>成本项目</th><th>金额（元/台）</th></tr></thead><tbody><tr v-for="cost in form.costs" :key="cost.id"><td>{{ cost.label }}</td><td><input v-model="cost.amount" type="number" min="0" step="0.01" placeholder="0.00" /></td></tr><tr class="total-row"><td>单位总成本</td><td>{{ currency(totalCost) }}</td></tr></tbody></table></div>
-              <div class="profit-panel"><div class="profit-formula">单位毛利 = 目标售价 − 单位总成本<br />毛利率 = 单位毛利 ÷ 单位总成本</div><label><span>目标售价（元/台）</span><input v-model="form.targetPrice" type="number" min="0" step="0.01" placeholder="填写目标售价" /></label><div class="computed"><span>单位毛利</span><b>{{ currency(unitGrossProfit) }} 元</b></div><div class="computed"><span>毛利率</span><b>{{ percent(grossMargin) }}</b></div></div>
-            </div>
+          <section class="form-section">
+            <div class="section-title"><span>05</span><div><h3>成本结构分析</h3><p>填写各项单位成本，单位总成本由系统自动汇总。</p></div></div>
+            <div class="table-wrap"><table><thead><tr><th>成本项目</th><th>金额（元/台）</th></tr></thead><tbody><tr v-for="cost in form.costs" :key="cost.id"><td class="fixed-cell">{{ cost.label }}</td><td><input v-model="cost.amount" type="number" min="0" step="0.01" placeholder="填写金额" /></td></tr><tr class="total-row"><td>单位总成本</td><td><input :value="currency(totalCost)" readonly aria-label="单位总成本" /></td></tr></tbody></table></div>
+          </section>
+
+          <section class="form-section">
+            <div class="section-title"><span>06</span><div><h3>定价与毛利分析</h3><p>单位毛利 = 单位目标售价 − 单位总成本；毛利率 = 单位毛利 ÷ 单位总成本。</p></div></div>
+            <div class="table-wrap"><table><thead><tr><th>指标</th><th>数值</th></tr></thead><tbody><tr><td class="fixed-cell">目标售价（元/台）</td><td><input v-model="form.targetPrice" type="number" min="0" step="0.01" placeholder="填写目标售价" /></td></tr><tr class="total-row"><td>单位毛利（元/台）</td><td><input :value="currency(unitGrossProfit)" readonly aria-label="单位毛利" /></td></tr><tr class="total-row"><td>毛利率（%）</td><td><input :value="percent(grossMargin)" readonly aria-label="毛利率" /></td></tr></tbody></table></div>
           </section>
 
           <section class="form-section">
-            <div class="section-title"><span>06</span><div><h3>风险识别与评估</h3><p>识别项目主要风险，并明确影响程度及可执行的应对措施。</p></div></div>
+            <div class="section-title"><span>07</span><div><h3>风险识别与评估</h3><p>识别项目主要风险，并明确影响程度及可执行的应对措施。</p></div></div>
             <div class="table-wrap"><table><thead><tr><th>风险类型</th><th>具体风险描述</th><th>影响程度</th><th>应对措施</th></tr></thead><tbody><tr v-for="risk in form.risks" :key="risk.type"><td class="fixed-cell">{{ risk.type }}</td><td><textarea v-model.trim="risk.description" placeholder="填写具体风险" /></td><td><select v-model="risk.impact"><option value="">请选择</option><option value="高">高</option><option value="中">中</option><option value="低">低</option></select></td><td><textarea v-model.trim="risk.response" placeholder="填写应对措施" /></td></tr></tbody></table></div>
           </section>
 
diff --git a/src/views/foundation/new-product-survey.vue b/src/views/foundation/new-product-survey.vue
index d40f6b7..b6bb001 100644
--- a/src/views/foundation/new-product-survey.vue
+++ b/src/views/foundation/new-product-survey.vue
@@ -136,7 +136,7 @@
                 <div v-if="step2Form.images.length" class="product-image-list">
                   <figure v-for="(image, index) in step2Form.images" :key="`${image.url}-${index}`" class="product-image-card">
                     <button type="button" class="product-image-preview" @click="previewStepTwoImage(image.url)">
-                      <img :src="image.url" :alt="`${step2Form.productName || '产品'}图片 ${index + 1}`" />
+                      <img :src="resolveUploadedImageUrl(image.url)" :alt="`${step2Form.productName || '产品'}图片 ${index + 1}`" />
                     </button>
                     <figcaption :title="image.name">{{ image.name }}</figcaption>
                     <button type="button" class="remove-image-button" :aria-label="`删除图片 ${index + 1}`" @click="removeStepTwoImage(index)">删除</button>
@@ -272,6 +272,7 @@ import {
 import { getTrainingTaskByKey } from "@/api/trainingTask";
 import { checkNewProductSurveyStepFour, checkNewProductSurveyStepOne, checkNewProductSurveyStepThree, checkNewProductSurveyStepTwo, getStudentTrainingAnswer, saveStudentTrainingAnswer, uploadStudentTrainingFile } from "@/api/studentTrainingAnswer";
 import useUserStore from "@/store/modules/user";
+import { isExternal } from "@/utils/validate";
 import { extractTrainingStepNames } from "@/views/training/taskKeyMap";
 import TrainingAiSidebar from "@/views/components/TrainingAiSidebar.vue";
 import TrainingMaterialButton from "@/views/components/TrainingMaterialButton.vue";
@@ -582,8 +583,24 @@ function removeStepTwoImage(index) {
   step2Form.value.images.splice(index, 1);
 }
 
+function resolveUploadedImageUrl(url) {
+  const source = String(url || "").trim();
+  if (!source || source.startsWith("data:") || source.startsWith("blob:")) return source;
+  if (!isExternal(source)) return source.startsWith("/") ? source : `/${source}`;
+
+  try {
+    const parsed = new URL(source);
+    if (["localhost", "127.0.0.1", "::1"].includes(parsed.hostname)) {
+      return `${parsed.pathname}${parsed.search}${parsed.hash}`;
+    }
+  } catch {
+    return source;
+  }
+  return source;
+}
+
 function previewStepTwoImage(url) {
-  imagePreviewUrl.value = url;
+  imagePreviewUrl.value = resolveUploadedImageUrl(url);
   imagePreviewOpen.value = true;
 }
 
diff --git a/src/views/foundation/product-development-process.vue b/src/views/foundation/product-development-process.vue
index 35acece..a4f9e58 100644
--- a/src/views/foundation/product-development-process.vue
+++ b/src/views/foundation/product-development-process.vue
@@ -331,6 +331,16 @@ function buildStepTwoOutcome() {
   };
 }
 
+function getStepTwoValidationMessage() {
+  for (const row of processRows.value) {
+    if (!String(row.dependency || "").trim()) return `请填写任务 ${row.taskNo} 的项目依赖关系`;
+    if (!String(row.startDate || "").trim()) return `请填写任务 ${row.taskNo} 的开始时间`;
+    if (!String(row.endDate || "").trim()) return `请填写任务 ${row.taskNo} 的完成时间`;
+    if (row.startDate > row.endDate) return `任务 ${row.taskNo} 的完成时间不能早于开始时间`;
+  }
+  return "";
+}
+
 function buildStepThreeOutcome() {
   return { title: taskTitle.value, ganttImageUrl: ganttImage.value.url, ganttImageName: ganttImage.value.name };
 }
@@ -419,6 +429,11 @@ async function resetTraining() {
 
 async function saveAndGoToStepThree() {
   if (checking.value || !hasCompletedStepOne.value) return;
+  const validationMessage = getStepTwoValidationMessage();
+  if (validationMessage) {
+    proxy?.$modal?.msgWarning?.(validationMessage);
+    return;
+  }
   checking.value = true;
   try {
     await checkProductDevelopmentProcessStepTwo(buildStepTwoOutcome().items);
diff --git a/tests/business-feasibility-step-one.static.test.cjs b/tests/business-feasibility-step-one.static.test.cjs
new file mode 100644
index 0000000..0c0be08
--- /dev/null
+++ b/tests/business-feasibility-step-one.static.test.cjs
@@ -0,0 +1,13 @@
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+const test = require('node:test');
+
+const source = fs.readFileSync(path.resolve(__dirname, '../src/views/demand/business-feasibility.vue'), 'utf8');
+
+test('商业可行性第一步按七个原型区块拆分成本、定价与风险表格', () => {
+  assert.ok(source.includes('<h3>成本结构分析</h3>'), '成本结构应为独立区块');
+  assert.ok(source.includes('<h3>定价与毛利分析</h3>'), '定价与毛利应为独立区块');
+  assert.ok(source.includes('<span>07</span>'), '风险识别应作为第七个区块');
+  assert.ok(source.includes('readonly'), '单位总成本、单位毛利和毛利率应为只读计算结果');
+});
diff --git a/tests/new-product-survey-image-preview.static.test.cjs b/tests/new-product-survey-image-preview.static.test.cjs
new file mode 100644
index 0000000..9da0b5b
--- /dev/null
+++ b/tests/new-product-survey-image-preview.static.test.cjs
@@ -0,0 +1,16 @@
+const assert = require("node:assert/strict");
+const fs = require("node:fs");
+const path = require("node:path");
+const test = require("node:test");
+
+const source = fs.readFileSync(path.join(__dirname, "../src/views/foundation/new-product-survey.vue"), "utf8");
+
+test("实训一第二步的上传图片使用可访问地址预览", () => {
+  assert.match(source, /import\s*\{\s*isExternal\s*\}\s*from\s*["']@\/utils\/validate["']/);
+  assert.match(source, /<img\s+:src="resolveUploadedImageUrl\(image\.url\)"/);
+  assert.match(source, /function previewStepTwoImage\(url\)\s*\{\s*imagePreviewUrl\.value\s*=\s*resolveUploadedImageUrl\(url\)/);
+});
+
+test("实训一第二步将旧 localhost 文件地址转换为文件服务路径", () => {
+  assert.match(source, /function resolveUploadedImageUrl\(url\)[\s\S]*?new URL\(source\)[\s\S]*?localhost[\s\S]*?return `\$\{parsed\.pathname\}\$\{parsed\.search\}\$\{parsed\.hash\}`/);
+});
diff --git a/tests/product-development-process-step2-validation.static.test.cjs b/tests/product-development-process-step2-validation.static.test.cjs
new file mode 100644
index 0000000..0c5be7f
--- /dev/null
+++ b/tests/product-development-process-step2-validation.static.test.cjs
@@ -0,0 +1,15 @@
+const assert = require("node:assert/strict");
+const fs = require("node:fs");
+const path = require("node:path");
+const test = require("node:test");
+
+const source = fs.readFileSync(path.join(__dirname, "../src/views/foundation/product-development-process.vue"), "utf8");
+
+test("实训任务三第二步在提交前提示首个未填写字段", () => {
+  assert.match(source, /function getStepTwoValidationMessage\(\)[\s\S]*?请填写任务 \$\{row\.taskNo\} 的项目依赖关系/);
+  assert.match(source, /function getStepTwoValidationMessage\(\)[\s\S]*?请填写任务 \$\{row\.taskNo\} 的开始时间[\s\S]*?请填写任务 \$\{row\.taskNo\} 的完成时间/);
+});
+
+test("实训任务三第二步不完整时不请求后端校验", () => {
+  assert.match(source, /async function saveAndGoToStepThree\(\)\s*\{[\s\S]*?const validationMessage = getStepTwoValidationMessage\(\);[\s\S]*?if \(validationMessage\) \{[\s\S]*?msgWarning\?\.\(validationMessage\)[\s\S]*?return;[\s\S]*?\}\s*checking\.value = true;[\s\S]*?checkProductDevelopmentProcessStepTwo/);
+});