QFD2/QFluentWidgets/qss/light/check_box.qss

CheckBox {
    color: black;
    font: 14px 'Segoe UI', 'Microsoft YaHei';
    spacing: 8px;
    min-width: 28px;
    min-height: 20px;
}

CheckBox::indicator {
    width: 18px;
    height: 18px;
    border-radius: 5px;
    border: 1px solid rgb(135, 135, 135);
    background-color: rgb(241, 241, 241);
}

CheckBox::indicator:hover {
    border: 1px solid rgb(132, 132, 132);
    background-color: rgb(232, 232, 232);
}

CheckBox::indicator:pressed {
    border: 1px solid rgb(184, 184, 184);
    background-color: rgb(224, 224, 224);
}

CheckBox::indicator:checked,
CheckBox::indicator:indeterminate {
    border: 1px solid --ThemeColorPrimary;
    background-color: --ThemeColorPrimary;
}

CheckBox::indicator:checked {
    image: url(:/qfluentwidgets/images/check_box/Accept_white.svg);
}

CheckBox::indicator:indeterminate {
    image: url(:/qfluentwidgets/images/check_box/PartialAccept_white.svg);
}

CheckBox::indicator:checked:hover,
CheckBox::indicator:indeterminate:hover {
    border: 1px solid --ThemeColorLight1;
    background-color: --ThemeColorLight1;
}

CheckBox::indicator:checked:pressed,
CheckBox::indicator:indeterminate:pressed {
    border: 1px solid --ThemeColorLight3;
    background-color: --ThemeColorLight3;
}

CheckBox:disabled {
    color: rgba(0, 0, 0, 110);
}

CheckBox::indicator:disabled {
    border: 1px solid #bbbbbb;
    background-color: rgb(224, 224, 224);
}

CheckBox::indicator:checked:disabled,
CheckBox::indicator:indeterminate:disabled {
    border: 1px solid rgb(199, 199, 199);
    background-color: rgb(199, 199, 199);
}