diff --git a/docs/02-user-guide/11-security/01-controllability.md b/docs/02-user-guide/11-security/01-controllability.md
index 374dff7..e859a81 100644
--- a/docs/02-user-guide/11-security/01-controllability.md
+++ b/docs/02-user-guide/11-security/01-controllability.md
@@ -8,7 +8,7 @@ keywords: [可控性, 安全, 可见, 可控, 可逆, 透明]
 
 DesireCore 的安全设计围绕一个核心理念：**你始终是最终决策者。** 智能体是你的助手，不是你的管理者。为了确保这一点，我们构建了三层可控性体系。
 
-![三层可控性示意图：可见、可控、可逆层层递进](./img/controllability-layers.png)
+<!-- 图片待替换：三层可控性示意图 -->
 
 ## 第一层：可见（Visible）
 
diff --git a/docs/02-user-guide/11-security/02-risk-levels.md b/docs/02-user-guide/11-security/02-risk-levels.md
index 9854a19..873c281 100644
--- a/docs/02-user-guide/11-security/02-risk-levels.md
+++ b/docs/02-user-guide/11-security/02-risk-levels.md
@@ -8,7 +8,7 @@ keywords: [风险等级, 安全, 权限, 确认, 操作]
 
 DesireCore 将智能体的所有操作按照潜在影响分为四个风险等级。不同等级的操作有不同的确认方式，确保高风险操作得到充分审核，同时低风险操作不会过度打扰你。
 
-![四级风险等级金字塔示意图：从低风险到关键风险逐级递升](./img/risk-levels-pyramid.png)
+<!-- 图片待替换：四级风险等级金字塔示意图 -->
 
 ## 四级风险分类
 
diff --git a/docs/02-user-guide/11-security/04-data-security.md b/docs/02-user-guide/11-security/04-data-security.md
index 2f6245e..cfd4a6e 100644
--- a/docs/02-user-guide/11-security/04-data-security.md
+++ b/docs/02-user-guide/11-security/04-data-security.md
@@ -8,7 +8,7 @@ keywords: [数据安全, 加密, 本地存储, API Key, 隐私, 第三方]
 
 DesireCore 在设计之初就将数据安全作为核心考量。本页面帮助你了解你的数据是如何被保护的。
 
-![本地优先数据架构示意图：数据留在本地，仅模型请求发往配置的 API 端点](./img/data-flow.png)
+<!-- 图片待替换：本地优先数据架构示意图 -->
 
 ## 本地优先架构
 
diff --git a/docs/02-user-guide/11-security/05-ai-approval.md b/docs/02-user-guide/11-security/05-ai-approval.md
index a878990..85c28a6 100644
--- a/docs/02-user-guide/11-security/05-ai-approval.md
+++ b/docs/02-user-guide/11-security/05-ai-approval.md
@@ -8,7 +8,7 @@ keywords: [AI 审批, 工具审批, 命令审批, ask-external, 白名单, 权
 
 DesireCore 为每个智能体提供独立的工具与命令审批偏好。审批发生在真正执行操作之前；提示词、Skill 或委派不能绕过这条执行边界。
 
-![审批决策流程示意图：请求 → 风险评估 → 审批卡片 → 决策](./img/approval-flow.png)
+<!-- 图片待替换：审批决策流程示意图 -->
 
 ## 五种模式
 
diff --git a/docs/02-user-guide/11-security/img/approval-flow.png b/docs/02-user-guide/11-security/img/approval-flow.png
deleted file mode 100644
index c5b0a39..0000000
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diff --git a/docs/02-user-guide/11-security/img/controllability-layers.png b/docs/02-user-guide/11-security/img/controllability-layers.png
deleted file mode 100644
index b6d45e2..0000000
Binary files a/docs/02-user-guide/11-security/img/controllability-layers.png and /dev/null differ
diff --git a/docs/02-user-guide/11-security/img/data-flow.png b/docs/02-user-guide/11-security/img/data-flow.png
deleted file mode 100644
index 2e9c244..0000000
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diff --git a/docs/02-user-guide/11-security/img/risk-levels-pyramid.png b/docs/02-user-guide/11-security/img/risk-levels-pyramid.png
deleted file mode 100644
index fe37770..0000000
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diff --git a/docs/03-use-cases/01-general/01-document-writing.md b/docs/03-use-cases/01-general/01-document-writing.md
index b547e94..321be9c 100644
--- a/docs/03-use-cases/01-general/01-document-writing.md
+++ b/docs/03-use-cases/01-general/01-document-writing.md
@@ -2,7 +2,6 @@
 title: 文档写作
 description: 使用 AI 文书智能体整理思路、生成大纲、起草项目报告和方案文档。
 keywords: [文档写作, AI 文书, 报告, 写作助手, 内容创作]
-image: /img/use-cases/covers/cover-document-writing.jpg
 ---
 
 # 文档写作
diff --git a/docs/03-use-cases/01-general/02-data-analysis.md b/docs/03-use-cases/01-general/02-data-analysis.md
index f8a75c5..e3187a4 100644
--- a/docs/03-use-cases/01-general/02-data-analysis.md
+++ b/docs/03-use-cases/01-general/02-data-analysis.md
@@ -2,7 +2,6 @@
 title: 数据分析
 description: 使用数据分析师智能体清洗表格、计算指标、生成图表并整理分析结论。
 keywords: [数据分析, 报表, 可视化, 趋势预测, 数据分析师]
-image: /img/use-cases/covers/cover-data-analysis.jpg
 ---
 
 # 数据分析
diff --git a/docs/03-use-cases/01-general/03-email-management.md b/docs/03-use-cases/01-general/03-email-management.md
index 9266362..22436e2 100644
--- a/docs/03-use-cases/01-general/03-email-management.md
+++ b/docs/03-use-cases/01-general/03-email-management.md
@@ -2,7 +2,6 @@
 title: 邮件管理
 description: 使用邮件助手分类邮件、提取关键信息、整理待办并起草回复。
 keywords: [邮件管理, 邮件分类, 邮件回复, 待办事项, AI 助手]
-image: /img/use-cases/covers/cover-email-management.jpg
 ---
 
 # 邮件管理
diff --git a/docs/03-use-cases/01-general/04-meeting-assistant.md b/docs/03-use-cases/01-general/04-meeting-assistant.md
index 982e184..fe0f5a5 100644
--- a/docs/03-use-cases/01-general/04-meeting-assistant.md
+++ b/docs/03-use-cases/01-general/04-meeting-assistant.md
@@ -2,7 +2,6 @@
 title: 会议助手
 description: 使用会议助手准备议程、整理纪要、提取待办事项和跟进清单。
 keywords: [会议助手, 会议纪要, 议程, 待办事项, 效率提升]
-image: /img/use-cases/covers/cover-meeting-assistant.jpg
 ---
 
 # 会议助手
diff --git a/docs/03-use-cases/01-general/05-translation.md b/docs/03-use-cases/01-general/05-translation.md
index 641cb42..7be220c 100644
--- a/docs/03-use-cases/01-general/05-translation.md
+++ b/docs/03-use-cases/01-general/05-translation.md
@@ -2,7 +2,6 @@
 title: 翻译助手
 description: 使用翻译助手处理技术文档、商务邮件和本地化文本，并统一术语和风格。
 keywords: [翻译, 多语言, 本地化, 术语表, 翻译助手]
-image: /img/use-cases/covers/cover-translation.jpg
 ---
 
 # 翻译助手
diff --git a/docs/03-use-cases/01-general/06-data-analysis-agent.md b/docs/03-use-cases/01-general/06-data-analysis-agent.md
index 4763aff..c22bfe6 100644
--- a/docs/03-use-cases/01-general/06-data-analysis-agent.md
+++ b/docs/03-use-cases/01-general/06-data-analysis-agent.md
@@ -2,7 +2,6 @@
 title: 数据分析报告
 description: 使用数据分析报告智能体把数据、模板和分析说明整理成标准报告。
 keywords: [数据分析, 报告生成, 可视化, Excel, 财务报告]
-image: /img/use-cases/covers/cover-data-analysis-agent.jpg
 ---
 
 # 智能体生成标准数据分析报告
diff --git a/docs/03-use-cases/01-general/07-flowchart-agent.md b/docs/03-use-cases/01-general/07-flowchart-agent.md
index 75bde3f..ea415c1 100644
--- a/docs/03-use-cases/01-general/07-flowchart-agent.md
+++ b/docs/03-use-cases/01-general/07-flowchart-agent.md
@@ -2,7 +2,6 @@
 title: 流程图生成
 description: 根据自然语言描述、文档或代码生成流程图、架构图、时序图等可编辑图表。
 keywords: [流程图, 架构图, 时序图, 可视化, 图表生成]
-image: /img/use-cases/covers/cover-flowchart-agent.jpg
 ---
 
 # 用智能体生成流程图
diff --git a/docs/03-use-cases/01-general/08-web-scraping-agent.md b/docs/03-use-cases/01-general/08-web-scraping-agent.md
index 4060c01..63b3434 100644
--- a/docs/03-use-cases/01-general/08-web-scraping-agent.md
+++ b/docs/03-use-cases/01-general/08-web-scraping-agent.md
@@ -2,7 +2,6 @@
 title: 网页信息采集
 description: 使用网页信息采集智能体浏览公开网页、提取字段并整理为结构化数据。
 keywords: [信息采集, 网页爬虫, 数据抓取, 竞品监控, 结构化数据]
-image: /img/use-cases/covers/cover-web-scraping-agent.jpg
 ---
 
 # 智能体网页信息采集
diff --git a/docs/03-use-cases/02-professional/01-legal-advisor.md b/docs/03-use-cases/02-professional/01-legal-advisor.md
index 52d505f..94de531 100644
--- a/docs/03-use-cases/02-professional/01-legal-advisor.md
+++ b/docs/03-use-cases/02-professional/01-legal-advisor.md
@@ -2,7 +2,6 @@
 title: 法律顾问
 description: 使用法律顾问智能体辅助合同预审、法规检索和法律风险梳理。
 keywords: [法律顾问, 合同审查, 法规检索, 风险评估, 合规]
-image: /img/use-cases/covers/cover-legal-advisor.jpg
 ---
 
 # 法律顾问
diff --git a/docs/03-use-cases/02-professional/02-code-assistant.md b/docs/03-use-cases/02-professional/02-code-assistant.md
index 5e1a555..86a0b41 100644
--- a/docs/03-use-cases/02-professional/02-code-assistant.md
+++ b/docs/03-use-cases/02-professional/02-code-assistant.md
@@ -2,7 +2,6 @@
 title: 代码助手
 description: 使用代码助手智能体完成需求澄清、架构设计、代码实现、测试和迭代修改。
 keywords: [代码助手, 项目开发, 全栈开发, 代码生成, 架构设计]
-image: /img/use-cases/covers/cover-code-assistant.jpg
 ---
 
 # 代码助手
diff --git a/docs/03-use-cases/02-professional/03-finance-assistant.md b/docs/03-use-cases/02-professional/03-finance-assistant.md
index f943439..0d68888 100644
--- a/docs/03-use-cases/02-professional/03-finance-assistant.md
+++ b/docs/03-use-cases/02-professional/03-finance-assistant.md
@@ -2,7 +2,6 @@
 title: 财务助手
 description: 使用财务助手智能体辅助预算编制、费用审核、报表整理和成本分析。
 keywords: [财务助手, 预算编制, 费用审核, 财务报表, 成本分析]
-image: /img/use-cases/covers/cover-finance-assistant.jpg
 ---
 
 # 财务助手
diff --git a/docs/03-use-cases/02-professional/04-product-manager.md b/docs/03-use-cases/02-professional/04-product-manager.md
index fa0681d..69dd608 100644
--- a/docs/03-use-cases/02-professional/04-product-manager.md
+++ b/docs/03-use-cases/02-professional/04-product-manager.md
@@ -2,7 +2,6 @@
 title: 产品经理
 description: 使用产品经理智能体整理需求、撰写 PRD、跟踪迭代并识别项目风险。
 keywords: [产品经理, 需求文档, 迭代管理, Sprint, 项目管理]
-image: /img/use-cases/covers/cover-product-manager.jpg
 ---
 
 # 产品经理
diff --git a/docs/03-use-cases/02-professional/05-bidding-assistant.md b/docs/03-use-cases/02-professional/05-bidding-assistant.md
index 87cadf4..ca8a3da 100644
--- a/docs/03-use-cases/02-professional/05-bidding-assistant.md
+++ b/docs/03-use-cases/02-professional/05-bidding-assistant.md
@@ -2,7 +2,6 @@
 title: 招投标助手
 description: 使用招投标助手智能体辅助招标文件解读、资格自审、标书编制和投标检查。
 keywords: [招投标, 标书编制, 资格审查, 报价策略, 投标管理]
-image: /img/use-cases/covers/cover-bidding-assistant.jpg
 ---
 
 # 招投标助手
diff --git a/docs/03-use-cases/02-professional/06-real-estate.md b/docs/03-use-cases/02-professional/06-real-estate.md
index 1d13a4f..20c446b 100644
--- a/docs/03-use-cases/02-professional/06-real-estate.md
+++ b/docs/03-use-cases/02-professional/06-real-estate.md
@@ -2,7 +2,6 @@
 title: 房产顾问
 description: 使用房产顾问智能体辅助楼盘对比、价格参考、政策解读和购房需求梳理。
 keywords: [房产顾问, 楼盘分析, 价格评估, 购房决策, 房产投资]
-image: /img/use-cases/covers/cover-real-estate.jpg
 ---
 
 # 房产顾问
diff --git a/docs/03-use-cases/02-professional/07-data-scientist.md b/docs/03-use-cases/02-professional/07-data-scientist.md
index f08bfd6..193949d 100644
--- a/docs/03-use-cases/02-professional/07-data-scientist.md
+++ b/docs/03-use-cases/02-professional/07-data-scientist.md
@@ -2,7 +2,6 @@
 title: 数据科学家
 description: 使用数据分析师智能体辅助用户行为分析、预测建模、运营监控和实验评估。
 keywords: [数据科学, 用户行为分析, 预测模型, 运营监控, 可视化]
-image: /img/use-cases/covers/cover-data-scientist.jpg
 ---
 
 # 数据科学家
diff --git a/docs/03-use-cases/03-solutions/01-ai-copyright.md b/docs/03-use-cases/03-solutions/01-ai-copyright.md
index 25e7238..fb7d63f 100644
--- a/docs/03-use-cases/03-solutions/01-ai-copyright.md
+++ b/docs/03-use-cases/03-solutions/01-ai-copyright.md
@@ -2,7 +2,6 @@
 title: AI 软著申请
 description: 使用 DesireCore 辅助准备软件著作权申请材料，包括说明书、操作手册、截图和代码材料。
 keywords: [软著申请, 软件著作权, 自动化, 知识产权, 软著写作]
-image: /img/use-cases/covers/cover-ai-copyright.jpg
 ---
 
 # AI 软著申请
diff --git a/docs/03-use-cases/03-solutions/02-ai-bidding.md b/docs/03-use-cases/03-solutions/02-ai-bidding.md
index d606a6b..4db1425 100644
--- a/docs/03-use-cases/03-solutions/02-ai-bidding.md
+++ b/docs/03-use-cases/03-solutions/02-ai-bidding.md
@@ -2,7 +2,6 @@
 title: AI 招投标
 description: 使用多智能体协作辅助招标文件分析、标书编制、报价测算和投标检查。
 keywords: [AI 招投标, 标书编制, 多智能体协作, 投标管理, 质量控制]
-image: /img/use-cases/covers/cover-ai-bidding.jpg
 ---
 
 # AI 招投标
diff --git a/docs/03-use-cases/03-solutions/03-enterprise-coordination.md b/docs/03-use-cases/03-solutions/03-enterprise-coordination.md
index ff1f5ac..7a1b771 100644
--- a/docs/03-use-cases/03-solutions/03-enterprise-coordination.md
+++ b/docs/03-use-cases/03-solutions/03-enterprise-coordination.md
@@ -2,7 +2,6 @@
 title: 企业服务协调
 description: 使用 DesireCore 核心调度智能体拆解复杂任务、分派专业智能体并跟踪进度。
 keywords: [企业协调, 多智能体协作, 跨部门, 任务编排, DesireCore]
-image: /img/use-cases/covers/cover-enterprise-coordination.jpg
 ---
 
 # 企业服务协调
diff --git a/docs/03-use-cases/README.md b/docs/03-use-cases/README.md
index 1ac4f7c..0a9cd3f 100644
--- a/docs/03-use-cases/README.md
+++ b/docs/03-use-cases/README.md
@@ -16,24 +16,6 @@
 
 | 文件名 | 对应场景 |
 |--------|----------|
-| cover-data-analysis.jpg | 数据分析 (general) |
-| cover-data-analysis-agent.jpg | 数据分析 Agent (general) |
-| cover-document-writing.jpg | 文档写作 (general) |
-| cover-email-management.jpg | 邮件管理 (general) |
-| cover-flowchart-agent.jpg | 流程图 Agent (general) |
-| cover-meeting-assistant.jpg | 会议助手 (general) |
-| cover-translation.jpg | 翻译 (general) |
-| cover-web-scraping-agent.jpg | 网页抓取 Agent (general) |
-| cover-bidding-assistant.jpg | 投标助手 (professional) |
-| cover-code-assistant.jpg | 代码助手 (professional) |
-| cover-data-scientist.jpg | 数据科学家 (professional) |
-| cover-finance-assistant.jpg | 财务助手 (professional) |
-| cover-legal-advisor.jpg | 法律顾问 (professional) |
-| cover-product-manager.jpg | 产品经理 (professional) |
-| cover-real-estate.jpg | 房地产 (professional) |
-| cover-ai-bidding.jpg | AI 投标方案 (solutions) |
-| cover-ai-copyright.jpg | AI 版权保护 (solutions) |
-| cover-enterprise-coordination.jpg | 企业协同 (solutions) |
 
 ## 其他资产
 
diff --git a/static/img/use-cases/covers/cover-ai-bidding.jpg b/static/img/use-cases/covers/cover-ai-bidding.jpg
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