thank you for your support. I have created one litte bootstrap page. I have only two little problems. The logo position on the desktop browser is different to the position on the mobile device (iphone).
i found out that if you change the css code "bootstrap.min.css" from the container-fluid - padding-left:15px; to padding-left:0px; the logo will be at the correct position on the desktop browser but on the wrong possition on the mobile device.
do you have any ideas to solve this problem?