.promotion-banner-bg-wrapper{background:#222}@keyframes rotate{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.promotion-banner-bg{--size: 50vh;--speed: 100s;--easing: cubic-bezier(.8, .2, .2, .8);width:var(--size);height:var(--size);filter:blur(calc(var(--size) / 5));background-image:linear-gradient(#eb3737d9,#735bd2);animation:rotate var(--speed) var(--easing) alternate infinite;border-radius:30% 70% 70% 30%/30% 30% 70% 70%;transition:all .25s ease-out}