请帮我写一个 pyqt使主界面的颜色为炫酷次世代风格的qss代码

以下是一个炫酷次世代风格的QSS代码示例，可以将其应用于PyQt主界面：

QWidget {
    background-color: qlineargradient(x1:0, y1:0, x2:1, y2:1,
                                      stop:0 #1e2b3f, stop:1 #2c3e50);
    color: #bdc3c7;
    font-size: 14px;
    font-family: Arial;
}

QMenuBar {
    background-color: #34495e;
    color: #bdc3c7;
}

QMenuBar::item {
    background-color: transparent;
}

QMenuBar::item:selected {
    background-color: #2c3e50;
}

QMenu {
    background-color: #34495e;
    color: #bdc3c7;
    border: 1px solid #2c3e50;
}

QMenu::item {
    padding: 5px 20px;
}

QMenu::item:selected {
    background-color: #2c3e50;
}

QPushButton {
    background-color: #3498db;
    color: #ffffff;
    border: none;
    border-radius: 3px;
    padding: 5px 20px;
}

QPushButton:hover {
    background-color: #2980b9;
}

QLineEdit {
    background-color: #2c3e50;
    color: #bdc3c7;
    border: 1px solid #34495e;
    border-radius: 3px;
    padding: 5px;
}

QSpinBox, QDoubleSpinBox {
    background-color: #2c3e50;
    color: #bdc3c7;
    border: 1px solid #34495e;
    border-radius: 3px;
    padding: 5px;
}

QComboBox {
    background-color: #2c3e50;
    color: #bdc3c7;
    border: 1px solid #34495e;
    border-radius: 3px;
    padding: 5px;
}

QComboBox::drop-down {
    background-color: transparent;
}

QComboBox::down-arrow {
    image: url(icons/down_arrow.png);
    width: 10px;
    height: 10px;
}

QScrollBar:vertical {
    background-color: #2c3e50;
    border: none;
    width: 14px;
    margin: 0px 0px 0px 0px;
}

QScrollBar::handle:vertical {
    background-color: #3498db;
    min-height: 20px;
    border-radius: 7px;
}

QScrollBar::add-line:vertical {
    background-color: #2c3e50;
    height: 14px;
    subcontrol-position: bottom;
    subcontrol-origin: margin;
}

QScrollBar::sub-line:vertical {
    background-color: #2c3e50;
    height: 14px;
    subcontrol-position: top;
    subcontrol-origin: margin;
}

QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical {
    background-color: transparent;
}

QScrollBar:horizontal {
    background-color: #2c3e50;
    border: none;
    height: 14px;
    margin: 0px 0px 0px 0px;
}

QScrollBar::handle:horizontal {
    background-color: #3498db;
    min-width: 20px;
    border-radius: 7px;
}

QScrollBar::add-line:horizontal {
    background-color: #2c3e50;
    width: 14px;
    subcontrol-position: right;
    subcontrol-origin: margin;
}

QScrollBar::sub-line:horizontal {
    background-color: #2c3e50;
    width: 14px;
    subcontrol-position: left;
    subcontrol-origin: margin;
}

QScrollBar::add-page:horizontal, QScrollBar::sub-page:horizontal {
    background-color: transparent;
}

你可以将此代码复制到你的PyQt项目中，并使用setStyleSheet()方法将其应用于主窗口。例如，如果你的主窗口对象是"mainWindow"，则可以这样应用：

mainWindow.setStyleSheet("上述代码")

请注意，这只是一个基本的QSS示例，你可能需要进一步调整它以适应你的应用程序需求。