body{
    background: #e4f6ff;
}
h1{
    text-align: center;
    color: #666;
    font-size: 22px;
	padding-top:30px;
}
.container_box{
    padding-top: 220px;
    background: url('../imgs/bg.jpg') no-repeat;
    background-size:cover; 
    height: 100%;
}

@keyframes ddd{
    10%{
      transform: translateY(0px)
    }
    40%{
      transform: translateY(10px)
    }
    60%{
        transform: translateY(15px)
    }
    80%{
        transform: translateY(10px)
    }
    100%{
        transform: translateY(0px)
    }
  }


  .img-responsive{
      animation: ddd 2s linear infinite;
  }