new css

for new digital mockup section
addded digital mockup section

and link
new css

for digital mockup section
added digital mockup section
small fix
Merge pull request #253 from Chicachu/patch-6

new css
Merge pull request #254 from Chicachu/patch-7

new css
Merge pull request #255 from Chicachu/patch-8

added digital mockup section
Merge pull request #256 from luluyi661/soundscape

small fix