diff --git a/DICOM_and_UPP配准/static/app.js b/DICOM_and_UPP配准/static/app.js
index 37a41fa..b0f2edf 100644
--- a/DICOM_and_UPP配准/static/app.js
+++ b/DICOM_and_UPP配准/static/app.js
@@ -411,10 +411,22 @@ function stlSelectionSignature() {
   return [
     normalize(state.activeCase?.ct_number),
     state.algorithmModel || "",
-    [...state.selectedStlIds].map(Number).sort((a, b) => a - b).join(","),
+    state.stlFiles.map((file) => `${Number(file.id)}:${file.file_name || ""}:${file.size_bytes || 0}`).join(","),
   ].join("|");
 }
 
+function visibleModelRecords() {
+  return state.modelMeshes.filter((record) => state.selectedStlIds.has(Number(record.file?.id)) && record.mesh?.visible !== false);
+}
+
+function visibleModelBox() {
+  const records = visibleModelRecords();
+  if (!records.length) return null;
+  const box = new THREE.Box3();
+  records.forEach((record) => box.expandByObject(record.mesh));
+  return box;
+}
+
 function bodyPartTags(row) {
   const labels = Array.isArray(row?.body_part_labels) ? row.body_part_labels : [];
   const keys = Array.isArray(row?.body_part_keys) ? row.body_part_keys : [];
@@ -708,9 +720,7 @@ function renderStl() {
       const id = Number(input.dataset.stl);
       if (input.checked) state.selectedStlIds.add(id);
       else state.selectedStlIds.delete(id);
-      markDirty("stl");
-      renderStl();
-      await loadFusion();
+      await applyStlSelectionChange();
     });
   });
   renderAutoBoneOptions();
@@ -719,9 +729,7 @@ function renderStl() {
 async function selectAllStl() {
   if (!state.stlFiles.length) return;
   state.selectedStlIds = new Set(state.stlFiles.map((file) => Number(file.id)).filter(Number.isFinite));
-  markDirty("stl");
-  renderStl();
-  await loadFusion();
+  await applyStlSelectionChange();
 }
 
 async function invertStlSelection() {
@@ -732,9 +740,19 @@ async function invertStlSelection() {
     if (Number.isFinite(id) && !state.selectedStlIds.has(id)) next.add(id);
   });
   state.selectedStlIds = next;
+  await applyStlSelectionChange();
+}
+
+async function applyStlSelectionChange() {
   markDirty("stl");
   renderStl();
-  await loadFusion();
+  if (!state.modelMeshes.length) {
+    await loadFusion();
+    return;
+  }
+  applyStlVisibility();
+  applyModelDetail();
+  scheduleMappingDraw();
 }
 
 function stlLikelyScore(file) {
@@ -1094,9 +1112,19 @@ function clearFusion() {
 function applyFusionMode() {
   if (state.dicomGroup) state.dicomGroup.visible = state.fusionMode !== "model";
   if (state.modelGroup) state.modelGroup.visible = true;
-  $("fusionMeta").textContent = state.fusionMode === "model"
-    ? `单独模型 · STL ${state.selectedStlIds.size} 个`
-    : $("fusionMeta").textContent;
+  updateFusionMeta();
+}
+
+function updateFusionMeta() {
+  const selectedCount = visibleModelRecords().length || state.selectedStlIds.size;
+  if (state.fusionMode === "model") {
+    $("fusionMeta").textContent = `单独模型 · STL ${selectedCount} 个`;
+    return;
+  }
+  const volume = state.volumeMeta;
+  $("fusionMeta").textContent = volume
+    ? `DICOM ${volume.start + 1}-${volume.end + 1}/${volume.total} · STL ${selectedCount} 个`
+    : `DICOM - · STL ${selectedCount} 个`;
 }
 
 function fusionDetailSettings() {
@@ -1150,6 +1178,18 @@ function applyModelDetail() {
   scheduleMappingDraw();
 }
 
+function applyStlVisibility() {
+  const selected = state.selectedStlIds;
+  state.modelMeshes.forEach((record) => {
+    record.mesh.visible = selected.has(Number(record.file?.id));
+  });
+  if (state.modelBoundsFrame) state.modelBoundsFrame.visible = state.modelMeshes.some((record) => record.mesh.visible);
+  if (state.dicomGroup) state.dicomGroup.visible = state.fusionMode !== "model";
+  if (state.modelGroup) state.modelGroup.visible = true;
+  updateFusionMeta();
+  scheduleMappingDraw();
+}
+
 function syncDisplayControls() {
   document.querySelectorAll("[data-fusion-detail]").forEach((item) => item.classList.toggle("active", item.dataset.fusionDetail === state.fusionDetail));
   document.querySelectorAll("[data-model-detail]").forEach((item) => item.classList.toggle("active", item.dataset.modelDetail === state.modelDetail));
@@ -1193,7 +1233,7 @@ async function loadFusion() {
     $("fusionStatus").textContent = state.sceneReady
       ? "三维融合场景已就绪"
       : "2D 映射已就绪，当前浏览器未启用 WebGL";
-    $("fusionMeta").textContent = `DICOM ${volume.start + 1}-${volume.end + 1}/${volume.total} · STL ${state.selectedStlIds.size} 个`;
+    updateFusionMeta();
     renderDicomAnnotation();
     setFusionLoading(true, "正在渲染右侧分割映射", 96);
     updateDicomPreview();
@@ -1420,8 +1460,9 @@ function drawMappingView() {
     resetMappingCanvas("单独影像模式未叠加 STL 分割");
     return;
   }
-  if (!image?.complete || !image.naturalWidth || !volumeScene || !state.modelMeshes.length) {
-    resetMappingCanvas(state.modelMeshes.length ? "等待 DICOM Base Layer" : "当前没有可见 STL 构件");
+  const visibleRecords = visibleModelRecords();
+  if (!image?.complete || !image.naturalWidth || !volumeScene || !visibleRecords.length) {
+    resetMappingCanvas(visibleRecords.length ? "等待 DICOM Base Layer" : "当前没有可见 STL 构件");
     return;
   }
 
@@ -1447,7 +1488,7 @@ function drawMappingView() {
   const tempB = new THREE.Vector3();
   const tempC = new THREE.Vector3();
 
-  state.modelMeshes.forEach((record, index) => {
+  visibleRecords.forEach((record, index) => {
     const position = record.mesh.geometry.attributes.position;
     if (!position) return;
     const triangleCount = Math.floor(position.count / 3);
@@ -1487,7 +1528,7 @@ function drawMappingView() {
     }
   });
 
-  $("mappingStats").textContent = `${activeModules}/${state.modelMeshes.length} 构件 · ${segmentCount} 边 · ${filledPixels} px`;
+  $("mappingStats").textContent = `${activeModules}/${visibleRecords.length} 构件 · ${segmentCount} 边 · ${filledPixels} px`;
   $("mappingLegend").innerHTML = modules.length
     ? modules.map((item) => `
         <div class="legend-item" title="${escapeHtml(item.name)}">
@@ -1667,9 +1708,10 @@ async function buildStlModels(volume, onProgress = null) {
   const signature = stlSelectionSignature();
   if (signature && signature === state.stlSignature && state.rawModelGroup?.children.length) {
     updateBaseModelScaleFromBounds();
+    if (!state.modelBoundsFrame && state.modelLocalBounds?.size) addModelBoundsFrame(state.modelLocalBounds.size);
+    applyStlVisibility();
     applyPose();
     applyModelDetail();
-    if (!state.modelBoundsFrame && state.modelLocalBounds?.size) addModelBoundsFrame(state.modelLocalBounds.size);
     scheduleMappingDraw();
     onProgress?.(100);
     return;
@@ -1682,7 +1724,7 @@ async function buildStlModels(volume, onProgress = null) {
   state.modelBoundsFrame = null;
   state.modelLocalBounds = null;
   state.stlSignature = signature;
-  const files = state.stlFiles.filter((file) => state.selectedStlIds.has(Number(file.id)));
+  const files = state.stlFiles;
   if (!files.length) {
     applyPose();
     resetMappingCanvas("当前没有可见 STL 构件");
@@ -1741,6 +1783,7 @@ async function buildStlModels(volume, onProgress = null) {
   };
   updateBaseModelScaleFromBounds();
   addModelBoundsFrame(size);
+  applyStlVisibility();
   applyPose();
   scheduleMappingDraw();
   onProgress?.(100);
@@ -1768,8 +1811,15 @@ function applyPose(poseInput = state.pose) {
 function fitCamera() {
   if (!state.camera || !state.controls) return;
   const box = new THREE.Box3();
-  box.expandByObject(state.dicomGroup);
-  box.expandByObject(state.modelGroup);
+  if (state.dicomGroup?.visible !== false) box.expandByObject(state.dicomGroup);
+  const modelBox = visibleModelBox();
+  if (modelBox) box.union(modelBox);
+  if (box.isEmpty()) {
+    state.camera.position.set(0, -8.5, 4.4);
+    state.controls.target.set(0, 0, 0);
+    state.controls.update();
+    return;
+  }
   const size = new THREE.Vector3();
   const center = new THREE.Vector3();
   box.getSize(size);
@@ -1805,13 +1855,13 @@ function resetPose(kind) {
 }
 
 function stretchAxis(axis) {
-  if (!state.rawModelGroup?.children.length || !state.dicomSceneBox) {
+  const modelBox = visibleModelBox();
+  if (!modelBox || !state.dicomSceneBox) {
     $("autoResult").textContent = "请先选择 DICOM 序列和至少一个 STL。";
     return;
   }
   const axisKey = { x: "scaleX", y: "scaleY", z: "scaleZ" }[axis];
   if (!axisKey) return;
-  const modelBox = new THREE.Box3().setFromObject(state.modelGroup);
   const dicomSize = new THREE.Vector3();
   const modelSize = new THREE.Vector3();
   state.dicomSceneBox.getSize(dicomSize);
@@ -1842,7 +1892,7 @@ function suggestBoneSelection() {
   state.selectedStlIds = next;
   renderStl();
   markDirty();
-  loadFusion();
+  applyStlSelectionChange();
 }
 
 function readAutoSettings() {
@@ -1903,12 +1953,13 @@ function restoreAutoPose() {
 }
 
 function candidateScore(pose, settings = null) {
-  if (!state.dicomSceneBox || !state.modelGroup || !state.rawModelGroup?.children.length) return -Infinity;
+  if (!state.dicomSceneBox || !state.modelGroup || !visibleModelRecords().length) return -Infinity;
   const config = settings || readAutoSettings();
   const current = { ...state.pose };
   applyPose(pose);
-  const modelBox = new THREE.Box3().setFromObject(state.modelGroup);
+  const modelBox = visibleModelBox();
   applyPose(current);
+  if (!modelBox) return -Infinity;
   const overlap = modelBox.clone().intersect(state.dicomSceneBox);
   const overlapSize = new THREE.Vector3();
   overlap.getSize(overlapSize);
@@ -1929,7 +1980,7 @@ function candidateScore(pose, settings = null) {
 }
 
 function runAutoCoarse() {
-  if (!state.activeCase || !currentSeries() || !state.rawModelGroup?.children.length) {
+  if (!state.activeCase || !currentSeries() || !visibleModelRecords().length) {
     $("autoResult").textContent = "请先选择 DICOM 序列和至少一个 STL。";
     return;
   }
@@ -1948,7 +1999,7 @@ function runAutoCoarse() {
 }
 
 function runAutoFine() {
-  if (!state.activeCase || !currentSeries() || !state.rawModelGroup?.children.length) {
+  if (!state.activeCase || !currentSeries() || !visibleModelRecords().length) {
     $("autoResult").textContent = "请先选择 DICOM 序列和至少一个 STL。";
     return;
   }