Image de body background full responsive :

@charset "utf-8";

html {
	overflow: scroll;
}

html, body {
	height: 100 %;
}

body {
	margin: 0 auto;
	width: 100%;
	max-width: 100%;
	height: 828px;
	min-height: 100%;
	background-image: url(/images/fonds/fond-flou-lumineux.jpg);
	background-position: center center;
	background-repeat: no-repeat;
	background-attachment: fixed;
	background-color: #FFF;
	background-size: cover;
	position: relative;
	overflow: scroll;
}

table#table-titre,
table#table-animations,
table#table-ateliers,
table#table-rencontres,
table#table-fin {
    width: 100%; 
    margin-left: auto; 
    margin-right: auto;
	border-spacing: 0px;
	display: none;
}
table#table-animations,
table#table-ateliers,
table#table-rencontres,
table#table-fin {
		background-color: rgba(255,255,255,0.4);
}


/*th { 
 border-width:1px;
 border-style:solid; 
 border-color:red;
}
td { 
 border-width:1px;
 border-style:solid; 
 border-color:red;
}*/

/*a:link,
a:visited,
a:hover
a:active {
	color: #000;
	text-decoration: none;
}
a:hover {
	color: #fff;
	text-shadow: 1px 1px 10px rgba(0,0,0,0.7);
	-webkit-transition-duration: 0.2s; /* Safari *//*
    transition-duration: 0.2s;
}*/

@font-face {
    font-family: 'GeosansLight';
	src: url('GeosansLight.ttf') format('truetype');
}




/*----------Titre de la page----------*/

.titre {
	color: #666;
	letter-spacing: 7px;
	text-shadow: 4px 10px 12px rgba(0,0,0,0.7);
	padding: 40px 0px 50px 0px;
	font-family: 'GeosansLight', Verdana, Geneva, sans-serif;
	font-size:  52px;
	font-weight: lighter;
	text-align: center;
	line-height: 50px;
}
.titre a:link,
.titre a:visited,
.titre a:active {
	color:  #666;
}
.titre a:hover {
	color: #fff;
	-webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
}
/*p::first-letter {
	font-size: 1.5em;
	margin-right: -5px;
	margin-left: 10px;
}*/
span {
	display: inline-block;
}
span:first-letter {
	font-size: 1.5em;
}
.inter-titre-1 {
	height: 10px;
	background-color: rgba(0,0,0,0.4);
}
.inter-titre-2 {
	height: 1px;
	background-color: rgba(0,0,0,0.4);
}
.inter-titre-3 {
	height: 10px;
	background-color: rgba(255,255,255,0.4);
}
.inter-titre-4 {
	height: 3px;
	background-color: rgba(0,0,0,0.4);
}
.inter-titre-5 {
	height: 1px;
	background-color: rgba(255,255,255,0.4);
}
.sous-titre {
	padding: 10px;
	font-family: 'Dosis', sans-serif;
	font-weight: bold;
	font-size: 26px;
	text-align: center;
	vertical-align: middle;
	background-color: rgba(255,255,255,0.2);
}
.sous-titre a:link,
.sous-titre a:visited,
.sous-titre a:hover {
	color: #000;
	text-decoration: none;
}
.sous-titre a:hover {
	color: #fff;
	text-shadow: 1px 1px 10px rgba(0,0,0,0.5);
	-webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
}





/*----------Contenu de la page----------*/

.container {
	width: 100%;
	Display: table;
	Table-layout: fixed;
	Text-align: center;
	margin-bottom: 0px;
	padding-top: 30px;
	/*background-color: rgba(255,255,255,0.4);*/

}
.titre-texte {
	/*background-color: rgba(255,255,255,0.4);*/
	text-align: center;
	font-family: 'Dosis', sans-serif;
	font-size: 18px;
}

.bloc {
	display: inline-block;
	min-height: 150px;
	width: 95%;
	padding: 0px 10px 10px 10px;
	margin-left: auto;
	margin-right: auto;
	margin-bottom: 10px;
	text-align: center;
	font-family: 'Dosis', sans-serif;
	font-size: 18px;
}

.bloc-img {
	float: left;
	margin-left: 20px;
	margin-top: 20px;
	margin-bottom: 20px;
	margin-right: 20px;
}
.bloc-img img {
	height: 250px;
}
.bloc-img-droite {
	float: right;
	margin-right: 20px;
	margin-top: 20px;
	margin-bottom: 10px;
	margin-left: 20px;
}
.bloc-img-droite img {
	height: 250px;
}
.bloc-img-ligne {
	text-align: center;
	padding: 10px 10px;
	margin-left: 0px;
	margin-top: 20px;
	margin-bottom: 20px;
	margin-right: 0px;
	letter-spacing: 10px;
}
.bloc-img-ligne img {
	height: 250px;
}
.image-en-ligne {
	margin: 5px 0px;
}


.bloc-texte {
	text-align: left;
	padding: 0px 20px;
	margin-top: 0px;
	font-size: 18px;
	overflow: auto;
	font-family: 'Dosis', sans-serif;
	font-size: 18px;

}

.bloc-texte-centre {
	text-align: center;
	padding: 0px 20px;
	margin-top: 0px;
	font-size: 18px;
	overflow: auto;
	font-family: 'Dosis', sans-serif;
	font-size: 18px;

}

.bloc-date {
	vertical-align: top;
	padding-top: 0px;
	padding-right: 20px;
	padding-left: 20px;
	padding-bottom: 20px;
	margin: 0px auto;
}
.date {
	float: right;
	padding-right: 50px;
	font-family: 'Dosis', sans-serif;
	font-size: 18px;
	font-style: italic;
	margin-bottom: 0px;
}


.espace-vide {
	height: 30px;
	/*background-color: rgba(255,255,255,0.4);*/
}

.cliquez-lien {
	/**font-family: Arial, Helvetica, sans-serif;**/
	font-family: 'Dosis', sans-serif;
	font-size: 18px;	
}
.cliquez-lien:link,
.cliquez-lien:visited,
.cliquez-lien:active {
	color: #06C;
	text-decoration: none;
}
.cliquez-lien:hover {
	color: #0CF;
	text-decoration: none;
	-webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.2s;
}




/*----------Bas de page----------*/

.fin {
	height: 100px;
	margin: 0px auto;
	color: #666;
	text-align: center;
	letter-spacing: 5px;
	text-shadow: 2px 5px 6px rgba(0,0,0,0.7);
	padding: 0px 0px 30px 0px;
	font-family: 'GeosansLight', Verdana, Geneva, sans-serif;
	font-size:  14px;
	font-weight: lighter;
	vertical-align: bottom;
	line-height: 0px
}



@media only screen
	and (max-width : 480px)
	and (orientation : portrait) {
	/*Smartphone Galaxy S4 mini (portrait)*/

body {
	height: 828px;
}

table#table-titre,
table#table-animations,
table#table-ateliers,
table#table-rencontres,
table#table-fin {
    width: 100%;
}

table#table-titre tr:nth-child(8), 
table#table-titre tr:nth-child(9) {
	display: none;
}

.titre {
	letter-spacing: 0px;
	font-size: 50px;
	line-height: 40px;
	padding: 15px 0px 15px 0px;
}
.bloc-img,
.bloc-img-droite {
	text-align: center;
	float: none;
}
.bloc-img img,
.bloc-img-droite img,
.bloc-img-ligne img {
	height: 200px;
}
.bloc-texte {
	text-align: center;
}

.fin {
	letter-spacing: 0px;
}
}




@media only screen
	and (max-width : 720px)
	and (orientation : landscape) {
	/*Smartphone Galaxy S4 mini (paysage)*/

body {
	/*height: 828px;*/
	height: 360px;
}

table#table-titre,
table#table-animations,
table#table-ateliers,
table#table-rencontres,
table#table-fin {
    width: 100%;
}

table#table-titre tr:nth-child(3), 
table#table-titre tr:nth-child(4), 
table#table-titre tr:nth-child(5),
table#table-titre tr:nth-child(6),
table#table-titre tr:nth-child(7),
table#table-titre tr:nth-child(8) {
	display: none;
}

.titre {
	letter-spacing: 3px;
	font-size: 60px;
	line-height: 50px;
	padding: 20px 0px 15px 0px;
}
}




@media only screen
	and (min-width : 480px)
	and (max-width : 800px)
	and (orientation : portrait) {
	/*Tablette Surface RT (Portrait)*/

table#table-titre,
table#table-animations,
table#table-ateliers,
table#table-rencontres,
table#table-fin {
    width: 100%;
}

table#table-titre tr:nth-child(3), 
table#table-titre tr:nth-child(4), 
table#table-titre tr:nth-child(5),
table#table-titre tr:nth-child(6),
table#table-titre tr:nth-child(7),
table#table-titre tr:nth-child(8) {
	display: none;
}

.titre {
	letter-spacing: 3px;
	font-size: 60px;
	line-height: 50px;
	padding: 25px 0px 20px 0px;

}
}




@media only screen
	and (min-width : 800px)
	and (max-width : 1200px) {
	/*Tablette Surface RT (paysage)*/
	/*écrans jusqu'à 1200px de large*/
table#table-titre,
table#table-animations,
table#table-ateliers,
table#table-rencontres,
table#table-fin {
    width: 90%;
}
		
table#table-titre tr:nth-child(3), 
table#table-titre tr:nth-child(4), 
table#table-titre tr:nth-child(5),
table#table-titre tr:nth-child(6),
table#table-titre tr:nth-child(7),
table#table-titre tr:nth-child(8) {
	display: none;
}

.titre {
	letter-spacing: 5px;
	font-size: 60px;
	line-height: 50px;
	padding: 25px 0px 30px 0px;

}
}




@media only screen
	and (min-width : 1200px)
	and (max-width : 1600px) {
	/*écrans jusquà 1600 px de large*/

table#table-titre,
table#table-animations,
table#table-ateliers,
table#table-rencontres,
table#table-fin {
    width: 80%;
}
	
table#table-titre tr:nth-child(3), 
table#table-titre tr:nth-child(4), 
table#table-titre tr:nth-child(5),
table#table-titre tr:nth-child(6),
table#table-titre tr:nth-child(7),
table#table-titre tr:nth-child(8) {
	display: none;
}

.titre {
	letter-spacing: 10px;
	font-size: 60px;
	line-height: 50px;
	padding: 30px 0px 30px 0px;
}
}





@media only screen
	and (min-width : 1600px) {
	/*écrans d'une largeur supérieure à 1600 px*/

table#table-titre,
table#table-animations,
table#table-ateliers,
table#table-rencontres,
table#table-fin {
    width: 70%;
}

table#table-titre tr:nth-child(3), 
table#table-titre tr:nth-child(4), 
table#table-titre tr:nth-child(5),
table#table-titre tr:nth-child(6),
table#table-titre tr:nth-child(7),
table#table-titre tr:nth-child(8) {
	display: none;
}

.titre {
	letter-spacing: 10px;
	font-size: 60px;
	line-height: 50px;
	padding: 40px 0px 50px 0px;
}
}


 
/* Return on top */
#returnOnTop {
    background: url('/images/logos/fleche.png') no-repeat;
    bottom: 2%;
    cursor: pointer;
    display: none;
    filter: alpha(opacity = 50); /* IE < 8 */
    height: 60px;
    opacity: 0.5;
    position: fixed;
    right: 2%;
    width: 80px;
}

#returnOnTop:hover {
    filter: alpha(opacity = 100); /* IE < 8 */
    opacity: 1;
}