.soustitre2{
position: absolute; 
width: 300px; 
height: 39px; 
left: 50%; 
margin-left: -40px;
top: 130px;
font-size:21px;
}

.soustitre3{
position: absolute; 
width: 550px; 
height: 22px; 
left: 50%; 
margin-left: -210px;
top: 180px;
}

.photo1{
position: absolute; 
left: 50%; 
margin-left: 80px;
top: 220px;
}

.photo2{
position: absolute; 
left: 50%; 
margin-left: -100px;
top: 360px;
}

.photo3{
position: absolute; 
left: 50%; 
margin-left: -100px;
top: 220px;
}

.photo4{
position: absolute; 
left: 50%; 
margin-left: 120px;
top: 360px;
}

.photo1 img{
width: 150px;
height: 100px;
}

.photo2 img{
width: 150px;
height: 100px;
}

.photo3 img{
width: 150px;
height: 100px;
}

.photo4 img{
width: 70px;
height: 100px;
}

.texte{
position: absolute; 
width: 500px; 
left: 50%; 
margin-left: -140px;
top: 490px;
}

.agrandissement_photo1{
position: absolute; 
left: 50%; 
margin-left: -130px;
top: 220px;
}

.retour1{
position: absolute; 
left: 50%; 
margin-left: -130px;
top: 490px;
}

.agrandissement_photo2{
position: absolute; 
left: 50%; 
margin-left: -38px;
top: 220px;
}

.agrandissement_photo2 img{
width: 200px;
height: 270px;
}

.retour2{
position: absolute; 
left: 50%; 
margin-left: -38px;
top: 495px;
}

img{
border-color: black;
}