diff --git a/components/agents/agent-psd-template-export-preview.tsx b/components/agents/agent-psd-template-export-preview.tsx
index 309b34912..2651e76db 100644
--- a/components/agents/agent-psd-template-export-preview.tsx
+++ b/components/agents/agent-psd-template-export-preview.tsx
@@ -87,6 +87,17 @@ const DIMENSION_SUFFIX_REGEX = /-尺寸标注(?=\.)/;
 const DIMENSION_LINE_COLOR = "#666b73";
 const DIMENSION_TEXT_COLOR = "#2a2f35";
 const DIMENSION_TEXT_HALO_COLOR = "rgba(255,255,255,0.92)";
+const PREVIEW_DIMENSION_FONT_SIZE = 10.4;
+const PREVIEW_DIMENSION_LABEL_OFFSET = 13;
+const PREVIEW_DIMENSION_STROKE_WIDTH = 1.1;
+const PREVIEW_DIMENSION_STROKE_WIDTH_ACTIVE = 1.5;
+const PREVIEW_DIMENSION_CAP_STROKE_WIDTH = 1.55;
+const PREVIEW_DIMENSION_CAP_STROKE_WIDTH_ACTIVE = 1.9;
+const PREVIEW_DIMENSION_TICK_LENGTH = 5.2;
+const PREVIEW_DIMENSION_TICK_LENGTH_ACTIVE = 6.5;
+const PREVIEW_DIMENSION_HANDLE_RADIUS = 3.2;
+const PREVIEW_DIMENSION_HANDLE_STROKE_WIDTH = 1.2;
+const PREVIEW_DIMENSION_TEXT_HALO_WIDTH = 2.2;
 const SIZE_INFO_LINE_REGEX = /尺寸信息[:：]\s*([^\n]+)/i;
 const NUMBER_REGEX = /\d+(?:\.\d+)?/g;
 
@@ -377,7 +388,7 @@ function getPreviewAnnotationGeometry(params: {
     annotations,
     autoDimensionValues,
   });
-  const labelOffset = 16;
+  const labelOffset = PREVIEW_DIMENSION_LABEL_OFFSET;
   const rawAngleRadians = Math.atan2(vector.dy, vector.dx);
   const angleRadians =
     rawAngleRadians > Math.PI / 2
@@ -506,15 +517,15 @@ function drawAnnotationToCanvas(params: {
         ? rawAngleRadians + Math.PI
         : rawAngleRadians;
   const strokeWidth = clamp(
-    Math.min(imageSize.width, imageSize.height) * 0.0018,
-    1.25,
-    3
+    Math.min(imageSize.width, imageSize.height) * 0.001_35,
+    1,
+    2.4
   );
-  const capLength = strokeWidth * 6;
+  const capLength = strokeWidth * 5.3;
   const fontSize = clamp(
-    Math.round(Math.min(imageSize.width, imageSize.height) * 0.022),
-    14,
-    34
+    Math.round(Math.min(imageSize.width, imageSize.height) * 0.0176),
+    11,
+    27
   );
   const labelOffset = fontSize * 0.95;
   const centerX = (annotation.x1 + annotation.x2) / 2 + vector.nx * labelOffset;
@@ -549,7 +560,7 @@ function drawAnnotationToCanvas(params: {
   context.font = `500 ${fontSize}px "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif`;
   context.textAlign = "center";
   context.textBaseline = "middle";
-  context.lineWidth = Math.max(2, fontSize * 0.22);
+  context.lineWidth = Math.max(1.5, fontSize * 0.18);
   context.strokeStyle = DIMENSION_TEXT_HALO_COLOR;
   context.strokeText(label, 0, 0);
   context.fillStyle = DIMENSION_TEXT_COLOR;
@@ -1102,8 +1113,12 @@ export function AgentPsdTemplateExportPreview({
                   imageSize,
                   previewRect,
                 });
-                const strokeWidth = isSelected ? 2 : 1.5;
-                const tickLength = isSelected ? 8 : 6.5;
+                const strokeWidth = isSelected
+                  ? PREVIEW_DIMENSION_STROKE_WIDTH_ACTIVE
+                  : PREVIEW_DIMENSION_STROKE_WIDTH;
+                const tickLength = isSelected
+                  ? PREVIEW_DIMENSION_TICK_LENGTH_ACTIVE
+                  : PREVIEW_DIMENSION_TICK_LENGTH;
 
                 return (
                   <g key={annotation.id}>
@@ -1133,7 +1148,11 @@ export function AgentPsdTemplateExportPreview({
                       pointerEvents="none"
                       stroke={DIMENSION_LINE_COLOR}
                       strokeLinecap="round"
-                      strokeWidth={isSelected ? 2.5 : 2}
+                      strokeWidth={
+                        isSelected
+                          ? PREVIEW_DIMENSION_CAP_STROKE_WIDTH_ACTIVE
+                          : PREVIEW_DIMENSION_CAP_STROKE_WIDTH
+                      }
                       x1={geometry.start.x + geometry.vector.nx * tickLength}
                       x2={geometry.start.x - geometry.vector.nx * tickLength}
                       y1={geometry.start.y + geometry.vector.ny * tickLength}
@@ -1143,7 +1162,11 @@ export function AgentPsdTemplateExportPreview({
                       pointerEvents="none"
                       stroke={DIMENSION_LINE_COLOR}
                       strokeLinecap="round"
-                      strokeWidth={isSelected ? 2.5 : 2}
+                      strokeWidth={
+                        isSelected
+                          ? PREVIEW_DIMENSION_CAP_STROKE_WIDTH_ACTIVE
+                          : PREVIEW_DIMENSION_CAP_STROKE_WIDTH
+                      }
                       x1={geometry.end.x + geometry.vector.nx * tickLength}
                       x2={geometry.end.x - geometry.vector.nx * tickLength}
                       y1={geometry.end.y + geometry.vector.ny * tickLength}
@@ -1157,13 +1180,13 @@ export function AgentPsdTemplateExportPreview({
                       <text
                         dominantBaseline="middle"
                         fill={DIMENSION_TEXT_COLOR}
-                        fontSize={13}
+                        fontSize={PREVIEW_DIMENSION_FONT_SIZE}
                         fontWeight={500}
                         paintOrder="stroke"
                         pointerEvents="none"
                         stroke={DIMENSION_TEXT_HALO_COLOR}
                         strokeLinejoin="round"
-                        strokeWidth={2.8}
+                        strokeWidth={PREVIEW_DIMENSION_TEXT_HALO_WIDTH}
                         textAnchor="middle"
                         transform={`rotate(${geometry.angleDegrees} ${geometry.labelCenterX} ${geometry.labelCenterY})`}
                         x={geometry.labelCenterX}
@@ -1185,9 +1208,9 @@ export function AgentPsdTemplateExportPreview({
                               event
                             )
                           }
-                          r={4}
+                          r={PREVIEW_DIMENSION_HANDLE_RADIUS}
                           stroke={DIMENSION_LINE_COLOR}
-                          strokeWidth={1.5}
+                          strokeWidth={PREVIEW_DIMENSION_HANDLE_STROKE_WIDTH}
                         />
                         <circle
                           cx={geometry.end.x}
@@ -1200,9 +1223,9 @@ export function AgentPsdTemplateExportPreview({
                               event
                             )
                           }
-                          r={4}
+                          r={PREVIEW_DIMENSION_HANDLE_RADIUS}
                           stroke={DIMENSION_LINE_COLOR}
-                          strokeWidth={1.5}
+                          strokeWidth={PREVIEW_DIMENSION_HANDLE_STROKE_WIDTH}
                         />
                       </>
                     ) : null}