fix(title): 预设T字双图层渲染+间距1.5px+深色改浅色

- TitlePresetsGrid.tsx: 双层span叠加(底层text-shadow描边+上层填充色)
  解决-webkit-text-stroke在Chromium中吞掉填充色的bug
- generate.css: gap 6px→1.5px; 移除CSS全局font-weight:700
- constants.ts: 8个preset全部加_strokeColor/_strokeWidth
  fresh_minimal/business/handwriting深色(#333/#1a1a1a)改浅色(#e8e8e8/#e0e0e0)
  删除所有WebkitTextStroke属性
  variety_show保持粉色#ff4081+白色描边

apps/web/src/pages/generate/components/title/TitlePresetsGrid.tsx

@@ -1,5 +1,7 @@
 /**
  * 标题预设样式网格
+ * 双图层渲染：底层=描边轮廓(text-shadow模拟)，上层=填充色
+ * 避免 -webkit-text-stroke 在 Chromium 中吞掉填充色的问题
  */
 import React from "react"
 import { getFontFamily } from "../../constants"
@@ -7,7 +9,10 @@ import { getFontFamily } from "../../constants"
 interface TitlePresetItem {
   key: string
   label: string
-  previewStyle: React.CSSProperties
+  previewStyle: React.CSSProperties & {
+    _strokeColor?: string
+    _strokeWidth?: number
+  }
 }
 
 interface TitlePresetsGridProps {
@@ -17,6 +22,32 @@ interface TitlePresetsGridProps {
   fontFamily?: string
 }
 
+/**
+ * 用 text-shadow 模拟描边轮廓（8方向 + 4对角 = 12层阴影）
+ */
+function buildStrokeShadow(color: string, width: number): string {
+  const w = width
+  const parts: string[] = []
+  // 4 cardinal directions
+  parts.push(`${w}px 0 ${color}`)
+  parts.push(`${-w}px 0 ${color}`)
+  parts.push(`0 ${w}px ${color}`)
+  parts.push(`0 ${-w}px ${color}`)
+  // 4 diagonal directions
+  const d = Math.round(w * 0.71 * 10) / 10 // 0.71 ≈ sqrt(2)/2
+  parts.push(`${d}px ${d}px ${color}`)
+  parts.push(`${-d}px ${d}px ${color}`)
+  parts.push(`${d}px ${-d}px ${color}`)
+  parts.push(`${-d}px ${-d}px ${color}`)
+  // 4 extra mid-points for smoother stroke
+  const h = Math.round(w * 0.5 * 10) / 10
+  parts.push(`${w}px ${h}px ${color}`)
+  parts.push(`${w}px ${-h}px ${color}`)
+  parts.push(`${-w}px ${h}px ${color}`)
+  parts.push(`${-w}px ${-h}px ${color}`)
+  return parts.join(", ")
+}
+
 const TitlePresetsGrid: React.FC<TitlePresetsGridProps> = ({
   presets,
   activePreset,
@@ -27,6 +58,30 @@ const TitlePresetsGrid: React.FC<TitlePresetsGridProps> = ({
     <div className="xx-title-presets-grid">
       {presets.map((p) => {
         const isActive = activePreset === p.key
+        const { _strokeColor, _strokeWidth, ...fillStyle } = p.previewStyle
+        const ff = getFontFamily(fontFamily || "思源黑体")
+
+        // 底层：描边轮廓（用 text-shadow 模拟粗描边）
+        const strokeStyle: React.CSSProperties = {
+          color: _strokeColor || "transparent",
+          textShadow:
+            _strokeColor && _strokeWidth
+              ? buildStrokeShadow(_strokeColor, _strokeWidth)
+              : undefined,
+          fontWeight: fillStyle.fontWeight,
+          fontSize: fillStyle.fontSize,
+          lineHeight: 1,
+        }
+
+        // 上层：仅填充色 + 可选 textShadow（发光/投影效果）
+        const topStyle: React.CSSProperties = {
+          color: fillStyle.color,
+          textShadow: fillStyle.textShadow,
+          fontWeight: fillStyle.fontWeight,
+          fontSize: fillStyle.fontSize,
+          lineHeight: 1,
+        }
+
         return (
           <button
             key={p.key}
@@ -34,11 +89,22 @@ const TitlePresetsGrid: React.FC<TitlePresetsGridProps> = ({
             onClick={() => onApply(p.key)}
             title={p.label}
           >
-            <span
-              className="xx-title-preset-preview-text"
-              style={{ ...p.previewStyle, fontFamily: getFontFamily(fontFamily || "思源黑体") }}
-            >
-              T
+            <span className="xx-title-preset-preview-text" style={{ position: "relative" }}>
+              {/* 底层：描边轮廓 */}
+              <span
+                aria-hidden
+                style={{
+                  ...strokeStyle,
+                  fontFamily: ff,
+                  position: "absolute",
+                  top: 0,
+                  left: 0,
+                }}
+              >
+                T
+              </span>
+              {/* 上层：填充色 */}
+              <span style={{ ...topStyle, fontFamily: ff, position: "relative" }}>T</span>
             </span>
           </button>
         )

apps/web/src/pages/generate/constants.ts

@@ -78,9 +78,10 @@ export const TITLE_PRESETS = [
     label: "经典白字",
     style: { size: 28, color: "#ffffff", bold: true, italic: false, stroke: true, shadow: false },
     previewStyle: {
-      fontWeight: 700,
       color: "#ffffff",
-      WebkitTextStroke: "1px #000000",
+      _strokeColor: "#000000",
+      _strokeWidth: 2,
+      fontWeight: 700,
       fontSize: "32px",
     },
   },
@@ -89,10 +90,12 @@ export const TITLE_PRESETS = [
     label: "黑金质感",
     style: { size: 32, color: "#d4a843", bold: true, italic: false, stroke: false, shadow: true },
     previewStyle: {
-      fontWeight: 700,
       color: "#d4a843",
-      textShadow: "1px 1px 3px rgba(0,0,0,0.8)",
+      _strokeColor: "#1a1000",
+      _strokeWidth: 1.5,
+      fontWeight: 700,
       fontSize: "32px",
+      textShadow: "1px 1px 3px rgba(0,0,0,0.8)",
     },
   },
   {
@@ -100,10 +103,11 @@ export const TITLE_PRESETS = [
     label: "清新简约",
     style: { size: 24, color: "#333333", bold: false, italic: false, stroke: false, shadow: false },
     previewStyle: {
+      color: "#e8e8e8",
+      _strokeColor: "#cccccc",
+      _strokeWidth: 1,
       fontWeight: 400,
-      color: "#333333",
       fontSize: "32px",
-      WebkitTextStroke: "0.5px #888888",
     },
   },
   {
@@ -111,11 +115,12 @@ export const TITLE_PRESETS = [
     label: "综艺花字",
     style: { size: 36, color: "#ff4081", bold: true, italic: false, stroke: true, shadow: true },
     previewStyle: {
-      fontWeight: 900,
       color: "#ff4081",
-      WebkitTextStroke: "1.5px #ffffff",
-      textShadow: "2px 2px 4px rgba(0,0,0,0.5)",
+      _strokeColor: "#ffffff",
+      _strokeWidth: 2,
+      fontWeight: 900,
       fontSize: "32px",
+      textShadow: "2px 2px 4px rgba(0,0,0,0.5)",
     },
   },
   {
@@ -123,10 +128,11 @@ export const TITLE_PRESETS = [
     label: "商务极简",
     style: { size: 24, color: "#1a1a1a", bold: false, italic: false, stroke: false, shadow: false },
     previewStyle: {
+      color: "#e0e0e0",
+      _strokeColor: "#bbbbbb",
+      _strokeWidth: 1,
       fontWeight: 400,
-      color: "#1a1a1a",
       fontSize: "32px",
-      WebkitTextStroke: "0.5px #999999",
     },
   },
   {
@@ -134,10 +140,12 @@ export const TITLE_PRESETS = [
     label: "复古胶片",
     style: { size: 28, color: "#e8d5b7", bold: false, italic: false, stroke: false, shadow: true },
     previewStyle: {
-      fontWeight: 400,
       color: "#e8d5b7",
-      textShadow: "2px 2px 6px rgba(0,0,0,0.7)",
+      _strokeColor: "#3a2a1a",
+      _strokeWidth: 1.5,
+      fontWeight: 400,
       fontSize: "32px",
+      textShadow: "2px 2px 6px rgba(0,0,0,0.7)",
     },
   },
   {
@@ -145,10 +153,12 @@ export const TITLE_PRESETS = [
     label: "霓虹发光",
     style: { size: 32, color: "#00e5ff", bold: true, italic: false, stroke: false, shadow: true },
     previewStyle: {
-      fontWeight: 700,
       color: "#00e5ff",
-      textShadow: "0 0 4px #00e5ff, 0 0 8px #00e5ff, 0 0 16px rgba(0,229,255,0.5)",
+      _strokeColor: "#00e5ff",
+      _strokeWidth: 1,
+      fontWeight: 700,
       fontSize: "32px",
+      textShadow: "0 0 4px #00e5ff, 0 0 8px #00e5ff, 0 0 16px rgba(0,229,255,0.5)",
     },
   },
   {
@@ -156,11 +166,12 @@ export const TITLE_PRESETS = [
     label: "手写字",
     style: { size: 28, color: "#333333", bold: false, italic: false, stroke: false, shadow: true },
     previewStyle: {
+      color: "#e0e0e0",
+      _strokeColor: "#cccccc",
+      _strokeWidth: 1,
       fontWeight: 400,
-      color: "#333333",
-      WebkitTextStroke: "0.5px #888888",
-      textShadow: "1px 1px 2px rgba(0,0,0,0.3)",
       fontSize: "32px",
+      textShadow: "1px 1px 2px rgba(0,0,0,0.3)",
     },
   },
 ]

apps/web/src/pages/generate/generate.css

@@ -1734,7 +1734,7 @@
 .xx-title-presets-grid {
   display: grid;
   grid-template-columns: repeat(8, 1fr);
-  gap: 6px;
+  gap: 1.5px;
 }
 
 .xx-title-preset-card {
@@ -1763,7 +1763,6 @@
 
 .xx-title-preset-preview-text {
   font-size: 32px;
-  font-weight: 700;
   line-height: 1;
   user-select: none;
 }