fix: 富页登录按钮因重复CSS规则min-height:80vh位置偏高

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

cfc-frontend/pages/wealth/index.vue

@@ -739,14 +739,6 @@ export default {
   margin-bottom: 30rpx;
   line-height: 1.6;
 }
-.login-guide-section .login-btn {
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: center;
-  min-height: 80vh;
-  padding: 60rpx;
-}
 .login-guide-section .login-btn {
   width: 60%;
   height: 80rpx;