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    background-image: url('/files/thumbs/images/leistung-kachel/zahnersatz-v1-rm0-x260.jpg.jpg');
}                

@container (min-width: 260px) {
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        background-image: url('/files/thumbs/images/leistung-kachel/zahnersatz-v1-rm0-x260.jpg.jpg');
    }
}