Gotham with Whitney in action on dotrycatch.net

Under the hood

.header-1 { font-family: "Gotham SSm A", "Gotham SSm B", Avenir, sans-serif; font-size: 20px; font-style: normal; font-weight: bold; letter-spacing: normal; line-height: 26px; text-transform: none; color: #000000; }
.content-1 { font-family: "Whitney SSm A", "Whitney SSm B", Avenir, "Helvetica Neue"; font-size: 16px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 24px; text-transform: none; color: #000000; }
.content-2 { font-family: "Whitney SSm A", "Whitney SSm B", Avenir, sans-serif; font-size: 16px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 24px; text-transform: none; color: #000000; }

Whitney is available from MyFonts.