Use smaller font size and update description

Author: zouyonghao

config/_default/params.yaml

@@ -9,17 +9,17 @@ appearance:
   theme_day: minimal
   theme_night:
   font: native
-  font_size: L
+  font_size: M
 
 # SEO
 
 marketing:
   seo:
     site_type: Organization
     local_business_type: ''
-    org_name: ''
-    description: 'A highly-customizable Hugo research group theme powered by Wowchemy website builder.'
-    twitter: 'GetResearchDev'
+    org_name: 'TELOS'
+    description: 'At the Telos Systems lab, we study the [telos](https://en.wikipedia.org/wiki/Telos) of computer systems. Our goal is to produce **T**op-notch, **E**verlasting, and **L**uminous research in **O**perating **S**ystems.'
+    twitter: ''
   analytics:
     google_analytics: ''
     baidu_tongji: ''