diff --git a/docs/design/logo/favicon.svg b/docs/design/logo/favicon.svg
new file mode 100644
index 0000000..4d2c738
--- /dev/null
+++ b/docs/design/logo/favicon.svg
@@ -0,0 +1 @@
+
\ No newline at end of file
diff --git a/docs/design/logo/image-gen/PROMPT.md b/docs/design/logo/image-gen/PROMPT.md
new file mode 100644
index 0000000..229c895
--- /dev/null
+++ b/docs/design/logo/image-gen/PROMPT.md
@@ -0,0 +1,63 @@
+# 用位图生成工具做印章(ChatGPT 图像生成等)
+
+> 原因:前四轮用 SVG 程序化模拟印泥质感,效果都不理想(见 `../seal-research.md`)。印泥质感本质上是位图,改用能直接画位图的工具生成印章图形;字标「标博士 / BIAOBOSHI」继续用已经做好的矢量 W1(思源宋体 Black + Cinzel),后期再拼合。
+
+## 使用方法
+
+1. 新开一个对话,上传本目录下的参考图:
+ - `ref-glyph-structure.png`:「标」字的结构参考(宋体入印),**必传**;
+ - `ref-texture-chenjulai.png`:真实白文印的印泥质感参考,**建议传**(网络图片,只作风格参考);
+ - `ref-draft-1.png`:你最初的草稿,可选。
+2. 粘贴下面的「主提示词」(中文、英文二选一,英文对画面细节的控制通常更稳定)。
+3. 每次生成 2–4 张,挑最接近的一张,用「追加修改」继续调整,不要每次都从头生成。
+4. 选定后把**原图(PNG,尽量大)**放到 `docs/design/logo/image-gen/`,告诉我文件名。后续由我处理:抠出红色印章、校正为正方形、生成干净背景的透明 PNG、做 32px 小图标、和矢量字标拼成横版和竖版。
+
+## 主提示词(中文)
+
+```
+一方中国传统白文篆刻印章盖在纸上的印蜕,正面俯拍扫描效果。
+
+印文:只有一个简体汉字「标」,左边「木」右边「示」,字形参考我上传的结构图:宋体的骨架,但已经被篆刻刀「刻」过——笔画粗细基本均匀、末端方钝,没有宋体横画末端的小三角和撇捺的细尖。字形撑满印面,「木」和「示」之间、笔画和笔画之间的红色间隙宽窄均匀。字必须清晰可认,是标准的「标」字,不能多笔、少笔或变成别的字。
+
+形式:白文印,即红底白字,字是纸的白色,字以外是印泥的朱红色。印面为正方形,没有画出来的边框线,红色区域的外缘就是印石的边。四条边整体笔直,四个角圆方各不相同(例如一个角略圆,一个角近乎直角),边上有一两处很小的崩口。允许一处靠近边缘的白色笔画轻微切断红边(破边),但大部分红边是连续的。
+
+印泥质感:真实朱砂印泥盖在宣纸上的效果。红色是偏橙的朱红,不是偏粉的大红。整个红色区域布满极细的白色颗粒(纸张纤维没有着色的地方),浓淡不匀:一侧略实、另一侧略虚,变化是大片、缓慢的。红色边缘(包括印的外缘和每个白色笔画的边缘)印泥略浓,有细微的颗粒状毛边,像刀刻的边被印泥压出来的,而不是撕纸一样的大幅起伏。偶尔有极小的红点渗进白色笔画。
+
+画面:纯白背景,没有纸张纹理、没有阴影、没有其他物体、没有任何其他文字或落款。印章居中,四周留白约为印章宽度的 15%。光线均匀,像平板扫描仪扫出来的效果。正方形画幅,高分辨率。
+```
+
+## 主提示词(English)
+
+```
+A top-down flatbed scan of a traditional Chinese "baiwen" (white-text, intaglio) seal impression stamped on paper.
+
+Seal text: exactly one simplified Chinese character 「标」 (left component 木, right component 示). Follow the structure of the uploaded glyph reference: a Song-typeface skeleton that has been carved by a seal-carving knife — near-uniform stroke weight, square/blunt stroke ends, no Song-style triangular serifs or tapered tips. The character fills the seal face; the red gaps between strokes are even. The character must be clearly legible and correct — no extra or missing strokes, not a different character.
+
+Form: white characters on a red ground (the strokes are bare paper, everything else is seal paste). Square seal face with no drawn border line — the outer edge of the red area is the edge of the stone. The four sides are straight overall; the four corners differ (one slightly rounded, one nearly square, etc.), with one or two tiny chips along the edges. At most one stroke near the edge may lightly break through the red margin; the margin is otherwise continuous.
+
+Ink texture: authentic cinnabar seal paste on xuan paper. The red is an orange-leaning vermilion, not a pinkish red. The whole red area is covered with very fine white specks where paper fibers did not take ink, with uneven density — one side slightly denser, the other slightly lighter, varying in broad gradual areas. Along every red edge (outer edge and the edges of each white stroke) the paste is slightly heavier, with fine granular, crisp knife-cut edges — not torn-paper wobble. Occasionally a tiny red speck intrudes into a white stroke.
+
+Composition: pure white background, no paper texture, no shadows, no other objects, no other text, signatures or marks. Seal centered with margins about 15% of the seal width. Even lighting like a flatbed scanner. Square format, high resolution.
+```
+
+## 追加修改时常用的话
+
+| 问题 | 追加的话 |
+|---|---|
+| 字写错了或多了笔画 | 「字必须是标准简体『标』:左『木』右『示』,『示』上面是两横,下面是一竖和左右两点。保持其他一切不变。」 |
+| 太像字体,没有刀刻感 | 「笔画末端改成刀刻的方钝形状,边缘带细微的颗粒毛边,去掉所有宋体的三角和细尖。」 |
+| 质感太重、太脏 | 「质感减弱一半:颗粒更细、更少,印面整体更饱满,只在一侧有轻微的虚。」 |
+| 质感太弱、像平涂 | 「加强印泥颗粒感:整个红色区域都要有极细的白色颗粒,一侧明显更虚。」 |
+| 颜色偏粉 | 「红色改为偏橙的朱砂红,接近 #CF3A24。」 |
+| 红边断得太多 | 「印的外缘红边保持连续,最多只有一处很小的破边。」 |
+| 出现了边框线或背景纸纹 | 「去掉边框线,红色区域的外缘就是印的边;背景改为纯白,无纹理。」 |
+
+## 可选:直接生成整个横版 logo
+
+位图工具画中文字标时,容易把字写错,字形也没法精确控制,所以**不建议**用它画「标博士」三个字和拼音。想看整体感觉的话,可以在印章满意之后追加:
+
+```
+在印章右侧加上深藏青色(#1C2554)的「标博士」三个字,用笔画粗壮的宋体,字高与印章同高的 70%;下方一行等宽拉开字距的大写拼音「BIAOBOSHI」,用古典碑刻风格的衬线体。纯白背景。
+```
+
+这张图只用来看整体效果,正式版本仍然用矢量字标拼合。
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diff --git a/docs/design/logo/licenses/OFL-LibreCaslonText.txt b/docs/design/logo/licenses/OFL-LibreCaslonText.txt
new file mode 100644
index 0000000..d718bc9
--- /dev/null
+++ b/docs/design/logo/licenses/OFL-LibreCaslonText.txt
@@ -0,0 +1,93 @@
+Copyright 2018 The Libre Caslon Text Project Authors (https://github.com/thundernixon/Libre-Caslon)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+https://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.
diff --git a/docs/design/logo/licenses/OFL-NotoSansSC.txt b/docs/design/logo/licenses/OFL-NotoSansSC.txt
new file mode 100644
index 0000000..1c9f432
--- /dev/null
+++ b/docs/design/logo/licenses/OFL-NotoSansSC.txt
@@ -0,0 +1,93 @@
+Copyright 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+https://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.
diff --git a/docs/design/logo/licenses/OFL-NotoSerifSC.txt b/docs/design/logo/licenses/OFL-NotoSerifSC.txt
new file mode 100644
index 0000000..94d1bf7
--- /dev/null
+++ b/docs/design/logo/licenses/OFL-NotoSerifSC.txt
@@ -0,0 +1,94 @@
+Copyright 2012 Google Inc. All Rights Reserved.
+
+This Font Software is licensed under the SIL Open Font License,
+Version 1.1.
+
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font
+creation efforts of academic and linguistic communities, and to
+provide a free and open framework in which fonts may be shared and
+improved in partnership with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply to
+any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software
+components as distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to,
+deleting, or substituting -- in part or in whole -- any of the
+components of the Original Version, by changing formats or by porting
+the Font Software to a new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed,
+modify, redistribute, and sell modified and unmodified copies of the
+Font Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components, in
+Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the
+corresponding Copyright Holder. This restriction only applies to the
+primary font name as presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created using
+the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.
diff --git a/docs/design/logo/logo-sheet.html b/docs/design/logo/logo-sheet.html
new file mode 100644
index 0000000..41082a4
--- /dev/null
+++ b/docs/design/logo/logo-sheet.html
@@ -0,0 +1,108 @@
+
+
+