#bloc-1 { z-index: calc( 10000 - 1 ) }
#bloc-2 { z-index: calc( 10000 - 2 ) }
#bloc-3 { background-image: url("https://qmbt-1929.version-beta.com/wp-content/uploads/2024/08/bandeau.png") }
#bloc-3 { z-index: calc( 10000 - 3 ) }
#bloc-4 { z-index: calc( 10000 - 4 ) }
#bloc-5 { z-index: calc( 10000 - 5 ) }