diff --git a/track-uniapp/src/pages/scan/components/TreeCanvas.vue b/track-uniapp/src/pages/scan/components/TreeCanvas.vue
index 653c174..8389a6d 100644
--- a/track-uniapp/src/pages/scan/components/TreeCanvas.vue
+++ b/track-uniapp/src/pages/scan/components/TreeCanvas.vue
@@ -1,30 +1,45 @@
 <template>
-  <view class="tree-area">
+  <view class="tree-canvas-container">
     <view v-if="!product.task_tree || !product.task_tree.length" class="zero-task">
       <text class="zero-icon">📋</text>
-      <text class="zero-text">该产品暂无流转任务</text>
+      <text class="zero-text">该产品暂无流转记录</text>
     </view>
+
     <template v-else>
-      <view class="canvas-hint">🖐 2D 蓝图画布：支持随意拖拽探索分支走向</view>
+      <view class="canvas-hint">🖐 2D 流转蓝图：支持全视角自由拖拽探索</view>
+
       <movable-area class="tree-movable-area">
-        <movable-view class="tree-movable-view" direction="all" :x="0" :y="0"
+        <movable-view
+          class="tree-movable-view"
+          direction="all"
+          :x="0" :y="0"
           :scale="true" :scale-min="0.5" :scale-max="2"
-          :style="{ width: Math.max(canvasWidth, 1200) + 'px', height: Math.max(canvasHeight, 1200) + 'px' }">
+          :style="{ width: canvasWidth + 'px', height: canvasHeight + 'px' }"
+        >
           <view class="canvas-inner">
+            <!-- 连线层 -->
             <view v-for="line in treeLines" :key="line.key" class="canvas-line" :style="lineStyle(line)"></view>
-            <view v-for="node in treeNodes" :key="node.id" class="canvas-node" :class="statusColor(node.status)"
+
+            <!-- 节点卡片层 -->
+            <view v-for="node in treeNodes" :key="node.id"
+              class="canvas-node" :class="statusColor(node.status)"
               :style="{ left: node.x + 'px', top: node.y + 'px' }"
               @tap="node.records && node.records.length && $emit('viewRecords', node)">
+
               <view class="cn-header">
                 <text class="cn-name">{{ node.task_name }}</text>
                 <text :class="['cn-badge', statusColor(node.status)]">{{ statusLabel(node.status) }}</text>
               </view>
+
               <text class="cn-assignee">负责人: {{ node.assignee_id || '—' }}</text>
+              <text v-if="node.is_rework" class="tag-rework">⚠ 返工工序</text>
+
               <text v-if="getTaskRemark(node)" class="cn-remark">📌 {{ getTaskRemark(node) }}</text>
+
               <view class="cn-footer">
-                <text v-if="node.status==='COMPLETED' && (!node.child_tasks || !node.child_tasks.length)" class="cn-end">🏁 终止</text>
-                <text v-if="node.status==='ARCHIVED'" class="cn-end cn-end-wh">📦 入库</text>
-                <text v-if="node.records && node.records.length" class="cn-records">📋 {{ node.records.length }}记录 ›</text>
+                <text v-if="node.status==='COMPLETED' && (!node.child_tasks || !node.child_tasks.length)" class="cn-end">🏁 终止分支</text>
+                <text v-else-if="node.status==='ARCHIVED'" class="cn-end cn-end-wh">📦 已入库</text>
+                <text v-if="node.records && node.records.length" class="cn-records">📋 {{ node.records.length }}条记录 ›</text>
               </view>
             </view>
           </view>
@@ -35,67 +50,141 @@
 </template>
 
 <script>
-const STATUS_MAP = { PENDING: "待接收", WIP: "进行中", COMPLETED: "已完成", REJECTED: "已驳回", ARCHIVED: "已入库" };
-
 export default {
   name: "TreeCanvas",
-  props: { product: { type: Object, default: null } },
+  props: {
+    product: { type: Object, required: true }
+  },
   emits: ["viewRecords"],
   computed: {
     treeNodes() {
-      const nodes = []; const CARD_W = 200, CARD_H = 140, GAP_X = 60, GAP_Y = 60;
-      const layout = (tasks, depth, startX) => {
-        if (!tasks || !tasks.length) return startX;
-        const y = 20 + depth * (CARD_H + GAP_Y); let x = startX; const childXs = [];
-        for (const t of tasks) {
-          nodes.push({ ...t, x, y }); const childStartX = x;
-          if (t.child_tasks && t.child_tasks.length) { x = layout(t.child_tasks, depth + 1, x); } else { x += CARD_W + GAP_X; }
-          childXs.push({ id: t.id, cx: childStartX + CARD_W / 2, cy: y + CARD_H, children: t.child_tasks || [] });
-        }
-        nodes._lines = nodes._lines || [];
-        for (const cx of childXs) { if (cx.children.length) { const midX = cx.cx; for (const c of cx.children) { const childNode = nodes.find(n => n.id === c.id); if (childNode) { nodes._lines.push({ key: cx.id + '-' + c.id, x1: midX, y1: cx.cy, x2: childNode.x + CARD_W / 2, y2: childNode.y }); } } } }
-        return x;
+      if (!this.product || !this.product.task_tree) return [];
+
+      // 1. 拍平所有任务（无视后端的错误嵌套）
+      const allTasks = [];
+      const flatten = (tasks) => {
+        if (!tasks) return;
+        for (const t of tasks) { allTasks.push(t); flatten(t.child_tasks); }
       };
-      if (this.product && this.product.task_tree) { nodes._lines = []; layout(this.product.task_tree, 0, 40); }
+      flatten(this.product.task_tree);
+
+      // 2. 绝对时间轴排序（强制自上而下流转）
+      allTasks.sort((a, b) => new Date(a.created_at).getTime() - new Date(b.created_at).getTime());
+
+      // 3. 智能分层（判定谁是同行裂变，谁是上下游）
+      const levels = [];
+      let currentLevel = [];
+      let lastTime = null;
+
+      allTasks.forEach(t => {
+        const tTime = new Date(t.created_at).getTime();
+        if (lastTime === null) {
+          currentLevel.push(t); lastTime = tTime;
+        } else {
+          if (Math.abs(tTime - lastTime) < 2000 ||
+             (t.parent_task_id && currentLevel.some(c => c.parent_task_id === t.parent_task_id))) {
+            currentLevel.push(t);
+          } else {
+            levels.push(currentLevel);
+            currentLevel = [t]; lastTime = tTime;
+          }
+        }
+      });
+      if (currentLevel.length > 0) levels.push(currentLevel);
+
+      // 4. 计算 X, Y 坐标
+      const CARD_W = 240, CARD_H = 140, GAP_X = 60, GAP_Y = 80;
+      const nodes = [];
+      nodes._lines = [];
+
+      let maxCards = Math.max(...levels.map(l => l.length));
+      const CENTER_X = (maxCards * CARD_W + (maxCards - 1) * GAP_X) / 2 + 60;
+
+      levels.forEach((lvlTasks, depth) => {
+        const y = 40 + depth * (CARD_H + GAP_Y);
+        const lvlWidth = lvlTasks.length * CARD_W + (lvlTasks.length - 1) * GAP_X;
+        const startX = CENTER_X - lvlWidth / 2;
+        lvlTasks.forEach((t, i) => {
+          nodes.push({ ...t, x: startX + i * (CARD_W + GAP_X), y, _depth: depth });
+        });
+      });
+
+      // 5. 智能连线生成
+      for (let d = 1; d < levels.length; d++) {
+        const curLvl = levels[d];
+        const prevLvl = levels[d - 1];
+        curLvl.forEach(curr => {
+          const currNode = nodes.find(n => n.id === curr.id);
+          let parents = [];
+          if (curr.parent_task_id) {
+            parents = nodes.filter(n => n.id === curr.parent_task_id);
+          }
+          if (parents.length === 0) {
+            parents = prevLvl.map(p => nodes.find(n => n.id === p.id));
+          }
+          parents.forEach(p => {
+            nodes._lines.push({
+              key: p.id + '-' + curr.id,
+              x1: p.x + CARD_W / 2, y1: p.y + CARD_H,
+              x2: currNode.x + CARD_W / 2, y2: currNode.y
+            });
+          });
+        });
+      }
       return nodes;
     },
     treeLines() { return this.treeNodes._lines || []; },
-    canvasWidth() { const nodes = this.treeNodes; if (!nodes.length) return 400; return Math.max(400, Math.max(...nodes.map(n => n.x)) + 300); },
-    canvasHeight() { const nodes = this.treeNodes; if (!nodes.length) return 400; return Math.max(400, Math.max(...nodes.map(n => n.y)) + 300); },
+    canvasWidth() { if (!this.treeNodes.length) return 400; return Math.max(800, Math.max(...this.treeNodes.map(n => n.x)) + 300); },
+    canvasHeight() { if (!this.treeNodes.length) return 400; return Math.max(800, Math.max(...this.treeNodes.map(n => n.y)) + 300); }
   },
   methods: {
-    statusLabel(s) { return STATUS_MAP[s] || s; },
-    statusColor(s) { switch (s) { case "PENDING": return "s-yellow"; case "WIP": return "s-blue"; case "COMPLETED": return "s-green"; case "REJECTED": return "s-red"; default: return "s-gray"; } },
-    getTaskRemark(t) { if (!t) return ""; if (t.remark) return t.remark; if (t.records && t.records.length > 0) { const recs = [...t.records].reverse(); const rec = recs.find(r => r.remark && r.remark.length > 0); if (rec) return rec.remark; } return ""; },
-    lineStyle(line) { const dx = line.x2 - line.x1; const dy = line.y2 - line.y1; const len = Math.sqrt(dx * dx + dy * dy); const angle = Math.atan2(dy, dx) * 180 / Math.PI; return { left: line.x1 + 'px', top: line.y1 + 'px', width: len + 'px', transform: `rotate(${angle}deg)`, transformOrigin: '0 0' }; },
-  },
+    getTaskRemark(t) {
+      if (!t) return "";
+      if (t.remark) return t.remark;
+      if (t.records && t.records.length > 0) {
+        const rec = t.records.find(r => r.remark && r.remark.trim().length > 0);
+        if (rec) return rec.remark;
+      }
+      return "";
+    },
+    lineStyle(line) {
+      const dx = line.x2 - line.x1; const dy = line.y2 - line.y1;
+      const len = Math.sqrt(dx * dx + dy * dy);
+      const angle = Math.atan2(dy, dx) * 180 / Math.PI;
+      return { left: line.x1 + 'px', top: line.y1 + 'px', width: len + 'px', transform: `rotate(${angle}deg)`, transformOrigin: '0 0' };
+    },
+    statusLabel(s) { const map = { PENDING: "待接收", WIP: "进行中", COMPLETED: "已完成", REJECTED: "已驳回", ARCHIVED: "已入库" }; return map[s] || s; },
+    statusColor(s) { switch (s) { case "PENDING": return "s-yellow"; case "WIP": return "s-blue"; case "COMPLETED": return "s-green"; case "REJECTED": return "s-red"; default: return "s-gray"; } }
+  }
 };
 </script>
 
 <style scoped>
-.tree-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; margin-top: 4px; }
-.canvas-hint { font-size: 11px; color: #9ca3af; text-align: center; padding: 4px 0; flex-shrink: 0; }
-.tree-movable-area { flex: 1; width: 100%; background-color: #ebedf0; border-radius: 12px; overflow: hidden; box-shadow: inset 0 0 20px rgba(0,0,0,0.05); }
+.tree-canvas-container { flex: 1; display: flex; flex-direction: column; overflow: hidden; background: #ebedf0; border-radius: 12px; margin-top: 10px; box-shadow: inset 0 0 10px rgba(0,0,0,0.02); }
+.zero-task { display: flex; flex-direction: column; align-items: center; padding: 40px 0; }
+.zero-icon { font-size: 40px; margin-bottom: 10px; }
+.zero-text { font-size: 14px; color: #9ca3af; }
+.canvas-hint { font-size: 11px; color: #9ca3af; text-align: center; padding: 8px 0; background: #fff; border-bottom: 1px solid #e5e7eb; flex-shrink: 0; }
+.tree-movable-area { flex: 1; width: 100%; }
 .canvas-inner { position: absolute; left: 0; top: 0; }
-.canvas-node { position: absolute; width: 180px; min-height: 100px; background: #ffffff; border-radius: 12px; padding: 14px; box-shadow: 0 4px 15px rgba(0,0,0,0.08); border-left: 6px solid #3b82f6; border-top: none; z-index: 10; display: flex; flex-direction: column; gap: 6px; }
+.canvas-node { position: absolute; width: 240px; min-height: 120px; background: #ffffff; border-radius: 12px; padding: 16px; box-shadow: 0 6px 16px rgba(0,0,0,0.06); border-left: 8px solid #3b82f6; border-top: none; z-index: 10; display: flex; flex-direction: column; gap: 8px; }
 .canvas-node.s-yellow { border-left-color: #f59e0b; }
 .canvas-node.s-blue { border-left-color: #3b82f6; }
 .canvas-node.s-green { border-left-color: #22c55e; }
 .canvas-node.s-red { border-left-color: #ef4444; }
 .cn-header { display: flex; align-items: center; justify-content: space-between; }
-.cn-name { font-size: 14px; font-weight: 800; color: #1f2937; }
-.cn-badge { font-size: 10px; padding: 2px 6px; border-radius: 8px; font-weight: 600; }
+.cn-name { font-size: 16px; font-weight: 800; color: #1f2937; }
+.cn-badge { font-size: 11px; padding: 2px 8px; border-radius: 8px; font-weight: 700; }
 .cn-badge.s-yellow { background: #fef3c7; color: #b45309; }
 .cn-badge.s-blue { background: #dbeafe; color: #1d4ed8; }
 .cn-badge.s-green { background: #dcfce7; color: #15803d; }
-.cn-assignee { font-size: 11px; color: #6b7280; }
-.cn-remark { font-size: 11px; color: #a16207; background: #fefce8; padding: 4px 8px; border-radius: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
-.cn-footer { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 6px; border-top: 1px solid #f3f4f6; }
-.cn-end { font-size: 10px; font-weight: 600; color: #16a34a; }
+.cn-badge.s-red { background: #fce4ec; color: #be123c; }
+.cn-assignee { font-size: 13px; color: #6b7280; font-weight: 500; }
+.tag-rework { font-size: 11px; color: #fff; background: #ef4444; padding: 2px 6px; border-radius: 6px; display: inline-block; width: max-content; }
+.cn-remark { font-size: 12px; color: #a16207; background: #fefce8; padding: 6px 10px; border-radius: 6px; border: 1px solid #fef08a; line-height: 1.4; word-break: break-all; }
+.cn-footer { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 10px; border-top: 1px dashed #e5e7eb; }
+.cn-end { font-size: 11px; font-weight: 700; color: #16a34a; }
 .cn-end-wh { color: #7c3aed; }
-.cn-records { font-size: 11px; color: #2563eb; font-weight: 600; }
-.canvas-line { position: absolute; height: 3px; background: #94a3b8; z-index: 1; border-radius: 2px; box-shadow: 0 1px 2px rgba(0,0,0,0.1); }
-.zero-task { display: flex; flex-direction: column; align-items: center; padding: 24px 0; }
-.zero-icon { font-size: 40px; margin-bottom: 8px; }
-.zero-text { font-size: 14px; color: #9ca3af; }
+.cn-records { font-size: 12px; color: #2563eb; font-weight: 700; background: #eff6ff; padding: 2px 8px; border-radius: 12px; }
+.canvas-line { position: absolute; height: 3px; background: #cbd5e1; z-index: 1; transform-origin: 0 0; }
 </style>