解决Bootstrap 试用手机端 布满全屏

 @media (max-width: 767px)

 {
   body{
     margin: 0;
     padding: 0;
   }
 }
 @media (max-width: 970px)
 {
   body{
     margin: 0;
     padding: 0;
   }container-fluid
 }
 @media (max-width: 480px)
 {
   body{
     margin: 0;
     padding: 0;
   }container-fluid
 }