head: use page.description

Fix paginator, but need better css style

set title line-height as 1.2em for fix phone device

Do not use Google Fonts directly for chinese user

set pre padding as 0.3em, set p code padding as 0.5em

set pre padding as 0.3em, set p code padding as 0.2em

README: update favicon.ico

styl file format 4 spec