.contacto
{
    position:relative;
    top:0;
    left:0;
    display:inline-block;
    
    width:465px;
    padding-bottom:20px;
}
.contacto .linea
{
    width:100%;
    float:left;
    margin-top:5px;
    vertical-align:top;
}
.contacto .linea .campo
{
    width:115px;
    margin-right:10px;
    text-align:right;
    float:left;
}
.contacto .linea .campo b
{
    margin-right:5px;
}
.contacto .linea .input
{
    width:250px;
    padding:0;
    border:1px solid #ccc;
    float:left;
}

.obligatorio
{
    float:left;
    margin-left:5px;
}