Helvetica Neue with Proxima Nova in action on prevue.it

Under the hood

.header-1 { font-family: proxima-nova, sans-serif; font-size: 30px; font-style: normal; font-weight: 200; letter-spacing: normal; line-height: 30px; text-transform: none; color: #FFFFFF; }
.content-1 { font-family: 'Helvetica Neue', Arial, sans-serif; font-size: 15px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 22px; text-transform: none; color: #9CA7AF; }
.content-2 { font-family: 'Helvetica Neue', Arial, sans-serif; font-size: 15px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 22px; text-transform: none; color: #9BBE1E; }
.content-3 { font-family: 'Helvetica Neue', Arial, sans-serif; font-size: 15px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 22px; text-transform: none; color: #9CA7AF; }
.content-4 { font-family: proxima-nova, sans-serif; font-size: 32px; font-style: normal; font-weight: 200; letter-spacing: normal; line-height: 48px; text-transform: none; color: #FFFFFF; }