.hero-bg, .hero-bg.parallax .parallax-bg {
    background-image: url("https://www.paypalobjects.com/webstatic/mktg/wright/sell_invoice/sell_invoice_hero_bg_1x.jpg");
}
.n1, .n1.parallax .parallax-bg {
    background-image: url("https://www.paypalobjects.com/webstatic/en_GB/mktg/wright/sell_invoice/sell_invoice_n1_1x.jpg");
}
.n2 {
    background-image: url("https://www.paypalobjects.com/webstatic/en_GB/mktg/wright/sell_invoice/sell_invoice_n2_1x.jpg");
}
.n3 {
    background-image: url("https://www.paypalobjects.com/webstatic/en_GB/mktg/wright/sell_invoice/sell_invoice_n3_1x.jpg");
}
.n4, .n4.parallax .parallax-bg {
    background-image: url("https://www.paypalobjects.com/webstatic/mktg/wright/sell_invoice/sell_invoice_n4_1x.jpg");
}