Hello,
Please delete this custom CSS code – http://prntscr.com/qap5ph and http://prntscr.com/qap5ua and http://prntscr.com/qap5zf
Then you need to add the next code in Theme Options > Theme Custom CSS > Global custom CSS:
.woocommerce-checkout .content-page .woocommerce {
margin-top: 8em;
}
@media (max-width: 480px) {
.woocommerce-checkout .content-page .woocommerce {
margin-top: 6em;
}
}
Regards