html {
  margin:0;
  padding:0;
  background: url('../images/anonymous.jpg') no-repeat center fixed;
  -webkit-background-size: cover; /* pour Chrome et Safari */
  -moz-background-size: cover; /* pour Firefox */
  -o-background-size: cover; /* pour Opera */
  background-size: cover; /* version standardisée */
}

.bas{
background:url('../images/amour.jpg') no-repeat;
background-size: 100%;
}
