ブラウザのコンソールは、外部リソースがブロックされていることを示しています
(index):8 Mixed Content: The page at 'https://mostafizur67.github.io/' was loaded over HTTPS, but requested an insecure stylesheet 'http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css'. This request has been blocked; the content must be served over HTTPS.
(index):1 Mixed Content: The page at 'https://mostafizur67.github.io/' was loaded over HTTPS, but requested an insecure script 'http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js'. This request has been blocked; the content must be served over HTTPS.
(index):13 Mixed Content: The page at 'https://mostafizur67.github.io/' was loaded over HTTPS, but requested an insecure stylesheet 'http://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css'. This request has been blocked; the content must be served over HTTPS.
ではなくhttp
のhttps
を使用して外部リソースをロードしてください。
[ブロックされた読み込み混在したアクティブなコンテンツ]の複製の可能性があります(http://stackoverflow.com/questions/20605423/blocked-loading-mixed-active-content) – poke