QFD2/QFluentWidgets/qss/dark/message_dialog.qss

QWidget {
    background-color: rgb(23, 23, 23);
    border: 1px solid rgb(55, 55, 55);
}

QWidget#windowMask {
    background-color: rgba(0, 0, 0, 0.6);
    border: none;
}

QLabel {
    background-color: transparent;
    color: white;
    font-family: 'Segoe UI', 'Microsoft YaHei';
    border: none;
}

QLabel#titleLabel {
    font-size: 18px;
}

QLabel#contentLabel {
    font-size: 14px;
}

QPushButton {
    background-color: rgb(51, 51, 51);
    font: 15px 'Segoe UI', 'Microsoft YaHei';
    border: transparent;
    color: white;
}

QPushButton:pressed:hover {
    background-color: rgb(102, 102, 102);
}

QPushButton:hover {
    background-color: rgb(35, 35, 35);
}

QPushButton:disabled {
    background-color: rgb(51, 51, 51);
    color: rgb(133, 133, 133);
}