.multi-number-selector {
    .selector-title-group {
        display: flex;
        border: 10px solid transparent;
        border-width: 0 10px;
        width: 100%;
        .selector-title-item {
            width: 25%;
            height: 30px;
            text-align: center;
            line-height: 30px;
        }
    }
}