Refine documentation homepage positioning

docs/user/index.md

@@ -2,7 +2,7 @@
 layout: home
 hero:
   name: DeepSeek Harness
-  text: Plugin-based agent development framework
+  text: Plugin-based Coding Agent
   tagline: Built on the Cordis microkernel; everything is a plugin
   actions:
     - theme: brand
@@ -12,12 +12,12 @@ hero:
       text: Develop plugins
       link: /en/develop/basic/
 features:
-  - title: Plugin architecture
-    details: Built on the Cordis plugin system. Every capability is registered by a plugin, takes effect when loaded, and is reverted when unloaded.
-  - title: Configuration as composition
-    details: One cordis.yml determines the agent's complete capability set. Change a model or add a tool by editing configuration.
-  - title: Ready to use
-    details: Includes LLM calls, file access, Bash execution, subagent delegation, and the rest of the core toolchain. Copy a template to get started.
+  - title: Microkernel
+    details: The kernel manages plugin lifecycles, events, and dependencies without containing product-specific capabilities.
+  - title: Plugin-first
+    details: Models, tools, sessions, and storage are provided by plugins that work together through events.
+  - title: Composable
+    details: Select, replace, or extend capabilities through configuration without modifying the Agent Loop.
 ---
 
 # DeepSeek Harness