diff --git a/api/main.py b/api/main.py
index 67a8a89..1df14ab 100644
--- a/api/main.py
+++ b/api/main.py
@@ -2641,8 +2641,8 @@ SUBJECT_VIEW_LABELS: dict[str, str] = {
     "three_quarter_right": "右前 45°",
     "side": "侧面",
     "side_walk": "侧面走路",
-    "top": "顶部视角",
-    "bottom": "底部视角",
+    "top": "正投影俯视图",
+    "bottom": "正投影仰视图",
     "expression_neutral": "中性表情",
     "expression_smile": "微笑表情",
     "expression_happy": "开心表情",
@@ -2691,11 +2691,27 @@ def _subject_view_labels(kind: SubjectKind, requested: list[str] | None = None)
         ("back", "背面"),
         ("left", "左侧"),
         ("right", "右侧"),
-        ("top", "顶部"),
-        ("bottom", "底部"),
+        ("top", "正投影俯视图"),
+        ("bottom", "正投影仰视图"),
     ]
 
 
+def _subject_view_projection_clause(view: str) -> str:
+    if view == "top":
+        return (
+            "Patent-style orthographic top view: look straight down from directly above the product, "
+            "with the viewing direction perpendicular to the top face. No perspective, no tilt, no 3/4 angle, "
+            "no oblique overhead camera, no visible front/side depth unless it is true product thickness in orthographic projection. "
+        )
+    if view == "bottom":
+        return (
+            "Patent-style orthographic bottom view: look straight up at the underside/bottom face, "
+            "with the viewing direction perpendicular to the bottom face. No perspective, no tilt, no 3/4 angle, "
+            "no low-angle perspective camera, no visible front/side depth unless it is true product thickness in orthographic projection. "
+        )
+    return ""
+
+
 def _attach_temporal_metrics(items: list[dict]) -> None:
     """相邻低清帧差异：转场 / 动作目标依赖它，不需要逐帧高分辨率扫描。"""
     for i, it in enumerate(items):
@@ -6910,11 +6926,13 @@ def _generate_subject_assets_sync(job_id: str, idx: int, element_id: str, req: G
             else:
                 view_prompt = f"complete object/product reference, {view_label} view"
             view_name = view.replace("_", " ")
+            projection_clause = _subject_view_projection_clause(view)
             single_view_clause = (
                 f"Single-image output rule: this output file is ONLY for the {view_label} view ({view_name}). "
                 "Render exactly one subject, one time, in one pose and one camera angle. "
                 "Do not create a multi-view sheet, contact sheet, grid, storyboard, lineup, comparison layout, before/after layout, mirrored pair, duplicate subjects, thumbnails, labels, captions, arrows, view names, panel borders, or multiple versions in the same image. "
                 "Do not include any other views in this image. "
+                + projection_clause
             )
             framing_clause = (
                 "For this close-up view, intentionally crop as an upper-body asset from head/neck to chest or upper back; the neck, shoulders, collarbone or upper spine area must be large, clear, and useful for placing a neck-and-shoulder massage device. "
diff --git a/docs/source-analysis.html b/docs/source-analysis.html
index 31add80..5af0c63 100644
--- a/docs/source-analysis.html
+++ b/docs/source-analysis.html
@@ -1181,6 +1181,19 @@ ProductRefStateItem {
         <h2>变更记录</h2>
         <p>这个记录不是 git log 的替代品。它记录“产品理解发生了什么变化、影响了哪些源码、你以后描述需求时该怎么说”。后续每次改功能都要补一条。</p>
         <div class="changelog">
+          <article class="change">
+            <header>
+              <h3>2026-05-25 · 主体套图俯视和仰视改为正投影口径</h3>
+              <span class="tag amber">API</span>
+              <span class="tag violet">UI</span>
+              <span class="tag blue">Docs</span>
+            </header>
+            <div class="body">
+              <p><strong>问题：</strong>原先主体/产品套图里把 <code>top</code> 和 <code>bottom</code> 简写为“顶部/底部”或“俯视/仰视”，模型容易理解成斜上方、斜下方或 3/4 透视镜头，不符合外观专利六面正投影视图的要求。</p>
+              <p><strong>改动：</strong><code>api/main.py</code> 的 <code>SUBJECT_VIEW_LABELS</code>、默认物体 6 视图和主体生图 prompt 已改为“正投影俯视图 / 正投影仰视图”，并在生成单图时加入 <code>orthographic top/bottom view</code>、<code>no perspective</code>、<code>no tilt</code>、<code>no 3/4 angle</code> 约束。<code>web/components/lightbox.tsx</code>、<code>web/components/ad-recreation-board.tsx</code> 和 <code>web/components/storyboard-editor.tsx</code> 同步更新显示文案和后续分镜提示词。</p>
+              <p><strong>影响：</strong>以后描述专利六面图需求时应说“正投影俯视图 / 正投影仰视图”，不要只说“俯视角度 / 仰视角度”；这些视图是垂直投影，不是带角度的摄影机视角。</p>
+            </div>
+          </article>
           <article class="change">
             <header>
               <h3>2026-05-24 · 默认首页完整重设计为多人创作平台</h3>
diff --git a/web/components/ad-recreation-board.tsx b/web/components/ad-recreation-board.tsx
index b1a8679..4fd122f 100644
--- a/web/components/ad-recreation-board.tsx
+++ b/web/components/ad-recreation-board.tsx
@@ -2019,6 +2019,11 @@ function selectProductItemsForRow(
 }
 
 function subjectViewLabel(view: string) {
+  const labels: Record<string, string> = {
+    top: "正投影俯视图",
+    bottom: "正投影仰视图",
+  }
+  if (labels[view]) return labels[view]
   return SUBJECT_ASSET_VIEWS.find((item) => item.value === view)?.label ?? view
 }
 
@@ -2034,6 +2039,8 @@ function subjectViewRoleHint(view: string) {
     bust_left_45: "肩颈左前近景、手部调整、佩戴贴合",
     bust_right_45: "肩颈右前近景、手部调整、佩戴贴合",
     back_neck_detail: "后颈肩背特写、触点位置、产品贴合",
+    top: "正投影俯视、无透视、无倾斜、产品顶部轮廓",
+    bottom: "正投影仰视、无透视、无倾斜、产品底部结构",
   }
   return hints[view] ?? "主体参考视角"
 }
@@ -2050,6 +2057,8 @@ function subjectViewPromptHint(view: string) {
     bust_left_45: "left three-quarter neck-and-shoulder close-up, hand adjustment, wearable fit",
     bust_right_45: "right three-quarter neck-and-shoulder close-up, hand adjustment, wearable fit",
     back_neck_detail: "back-neck and upper-back detail, contact-pad position, product fit",
+    top: "orthographic top view, straight down from above, no perspective, no tilt, no three-quarter angle",
+    bottom: "orthographic bottom view, straight up at underside, no perspective, no tilt, no three-quarter angle",
   }
   return hints[view] ?? "subject reference view"
 }
diff --git a/web/components/lightbox.tsx b/web/components/lightbox.tsx
index 2f1b390..a3a3649 100644
--- a/web/components/lightbox.tsx
+++ b/web/components/lightbox.tsx
@@ -36,8 +36,8 @@ const OBJECT_VIEW_OPTIONS = [
   ["back", "背面"],
   ["left", "左侧"],
   ["right", "右侧"],
-  ["top", "顶部"],
-  ["bottom", "底部"],
+  ["top", "正投影俯视图"],
+  ["bottom", "正投影仰视图"],
 ]
 
 const LIVING_VIEW_OPTIONS = [
diff --git a/web/components/storyboard-editor.tsx b/web/components/storyboard-editor.tsx
index 22550e0..504c1f1 100644
--- a/web/components/storyboard-editor.tsx
+++ b/web/components/storyboard-editor.tsx
@@ -129,7 +129,7 @@ export function StoryboardEditor({ job, frameIndex, onClose }: Props) {
                     📐 多视角
                   </div>
                   <div className="text-[9.5px] text-white/45 leading-tight">
-                    侧面 / 仰视 / 俯视等同元素的不同角度
+                    侧面 / 正投影俯视 / 正投影仰视等同元素不同视图
                   </div>
                 </button>
                 <button