.t-rec:nth-child(even) {
    background: linear-gradient(180deg, #E9DFDF, #FC6EC0);
    background-size: 100% 200%;
    animation: gradient 12s ease infinite;
}
.t-rec:nth-child(odd) {
    background: linear-gradient(180deg, #FC6EC0, #E9DFDF);
    background-size: 100% 200%;
    animation: gradient 12s ease infinite;
}
@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}