docs: refresh slogan, drop ETH-only framing

README.md

@@ -6,9 +6,10 @@
   **[qian.ag](https://qian.ag)** · [Explorer](https://etherscan.io) · [License: MIT](LICENSE)
 </div>
 
-Qian is a multichain exchange and token launchpad. You launch a token, its
-supply goes straight into a locked Uniswap position, and anyone can trade it in
-plain ETH. MIT licensed. No proxies, and no admin key over user funds.
+Qian is a multichain exchange and payments layer for every asset. This repo
+holds its on-chain contracts: launch a token, and its full supply goes straight
+into a locked Uniswap position that anyone can trade. MIT licensed. No
+proxies, and no admin key over user funds.
 
 The core contracts carry the same addresses on every chain (Robinhood Chain,
 Base, Ethereum), because each one was deployed from a fresh key at nonce 0. This
@@ -42,9 +43,8 @@ Every address above is source-verified on https://etherscan.io.
 - **Creator tax** is the Uniswap V4 pool fee, anywhere from 0.5% to 20%, picked
   at launch. It lives in the PoolKey, so it never changes after that. V3 pools
   use the fixed 1% tier.
-- **QianSwapRouter** handles user trades: buy or sell any Qian token for plain
-  ETH, with a 1% platform fee on the WETH leg. It keeps no balances between
-  trades.
+- **QianSwapRouter** handles user trades: buy or sell any Qian token for ETH,
+  with a 1% platform fee on the WETH leg. It keeps no balances between trades.
 
 ## Token