QSS样式

    ui->name->setProperty("themeID", "aboutName");
    ui->version->setProperty("themeID", "aboutVersion");
    ui->about->setProperty("themeID", "aboutHLayout");
    ui->authors->setProperty("themeID", "aboutHLayout");
    ui->license->setProperty("themeID", "aboutHLayout");
    ui->info->setProperty("themeID", "aboutInfo");

qss

/* About dialog */

* [themeID="aboutName"] {
    font-size: 36px;
    font-weight: bold;
}

* [themeID="aboutVersion"] {
    font-size: 16px;
    margin-bottom: 20px;
}

* [themeID="aboutInfo"] {
    margin-bottom: 20px;
}

* [themeID="aboutHLayout"] {
    background-color: palette(base);
}

QPushButton {
    color: palette(window-text);
    background-color: rgb(76,76,76);
    border: none;
    border-radius: 3px;
    padding: 4px;
    padding-left: 20px;
    padding-right: 20px;
}


QPushButton::flat {
    background-color: palette(window);
}

QPushButton:hover {
    background-color: rgb(122,121,122); /* light */
}

QPushButton:pressed {
    background-color: palette(base);
}

QPushButton:checked {
    background-color: rgb(122,121,122); /* light */
}

样式参考：

• C:\Program Files (x86)\DingDing\main\current\plugins\tblive\data\obs-studio\themes
• E:\obs\obs-studio-master\UI\data\themes