docs: update readme

Author: gusye1234

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   <a href="https://discord.gg/rpZs5TaSuV">
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-      <img alt="Show Acontext logo" src="https://assets.memodb.io/Acontext/Acontext-oneway.gif" width="418">
+      <source media="(prefers-color-scheme: dark)" srcset="./assets/Acontext-oneway-dark.gif">
+      <img alt="Show Acontext logo" src="./assets/Acontext-oneway.gif" width="418">
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 Acontext is a context data platform that:
 
 - **Stores** contexts & artifacts, using Postgres and S3
@@ -46,8 +48,8 @@ Acontext is a context data platform that:
 
 We're building it because we believe Acontext can help you:
 
-- **Build a more scalable agent product**
-- **Improve your agent success rate and reduce running steps**
+- **Build a more scalable agent product**: Acontext packs Postgres, Redis, S3, RabbitMQ together to enable multi-modal sessions and aritfacts storages, keep your context managment fast, cheap and easy.
+- **Improve your agent success rate and reduce running steps**: Acontext has built-in **Experience Agent**, which can manage and search the past experiences of tasks. So once your agent successfully completes a complex task for the user, it will almost never make a mistake again.
 
 so that your agent can be more stable and provide greater value to your users.
 
@@ -64,6 +66,8 @@ so that your agent can be more stable and provide greater value to your users.
 
 
 
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 # How to Start It? [📖](https://docs.acontext.io/local)
 
 > 📖 means a document link