DPI_ADAPTIVE_PATCH.diff

--- a/src/main.cpp
+++ b/src/main.cpp
@@ -6,6 +6,7 @@
 #include <QDir>
 #include <QFileInfo>
 #include <QFont>
+#include <QGuiApplication>
 #include <QIcon>
 #include <QJsonDocument>
 #include <QJsonObject>
@@ -246,6 +247,17 @@
 
 int main(int argc, char *argv[])
 {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+    // Make Qt 5 follow Windows DPI scaling. Qt 6 enables this behavior by default.
+    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+    QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
+#endif
+#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
+    // Preserve fractional Windows scale factors such as 125% and 150%.
+    QGuiApplication::setHighDpiScaleFactorRoundingPolicy(
+        Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
+#endif
+
     QStringList rawArguments;
     rawArguments.reserve(argc);
     for (int index = 0; index < argc; ++index) {
--- a/src/ui/MainWindow.cpp
+++ b/src/ui/MainWindow.cpp
@@ -35,6 +35,7 @@
 #include <QPalette>
 #include <QPixmap>
 #include <QPushButton>
+#include <QRegularExpression>
 #include <QScreen>
 #include <QScrollArea>
 #include <QSettings>
@@ -55,6 +56,66 @@
 #include <functional>
 
 namespace {
+qreal g_uiScale = 1.0;
+
+qreal calculateUiScale()
+{
+    QScreen *screen = QGuiApplication::primaryScreen();
+    if (!screen) {
+        return 1.0;
+    }
+
+    // QScreen geometry is expressed in device-independent pixels when Qt high-DPI
+    // scaling is active. This means Windows 150%/200% scaling is already taken
+    // into account, and we only add a modest boost when a display still exposes
+    // substantially more logical workspace than a 1920x1080 reference screen.
+    const QSize available = screen->availableGeometry().size();
+    const qreal widthRatio = available.width() / 1920.0;
+    const qreal heightRatio = available.height() / 1080.0;
+    const qreal workspaceRatio = qMin(widthRatio, heightRatio);
+    if (workspaceRatio <= 1.0) {
+        return 1.0;
+    }
+
+    // Square-root growth keeps 2K comfortable without making 4K oversized:
+    // 2560x1440 -> ~1.15x, 3840x2160 -> ~1.41x (at 100% OS scaling).
+    return qBound<qreal>(1.0, std::sqrt(workspaceRatio), 1.50);
+}
+
+int sp(int value)
+{
+    if (value <= 0) {
+        return value;
+    }
+    return qMax(1, qRound(value * g_uiScale));
+}
+
+
+QString scaleStyleSheetPixels(const QString &style, qreal scale)
+{
+    if (scale <= 1.001) {
+        return style;
+    }
+
+    static const QRegularExpression pixelPattern(QStringLiteral(R"((\d+(?:\.\d+)?)px)"));
+    QString result;
+    result.reserve(style.size() + style.size() / 12);
+
+    int last = 0;
+    auto matchIt = pixelPattern.globalMatch(style);
+    while (matchIt.hasNext()) {
+        const QRegularExpressionMatch match = matchIt.next();
+        result += style.mid(last, match.capturedStart() - last);
+
+        const qreal value = match.captured(1).toDouble();
+        const int scaledValue = value <= 0.0 ? 0 : qMax(1, qRound(value * scale));
+        result += QString::number(scaledValue) + QStringLiteral("px");
+        last = match.capturedEnd();
+    }
+    result += style.mid(last);
+    return result;
+}
+
 class ShareDropArea : public QFrame {
 public:
     std::function<void(const QStringList &)> onDropPaths;
@@ -220,8 +281,8 @@
 QIcon buildSidebarIcon(UiIcon kind)
 {
     QIcon icon;
-    const QPixmap normal = drawUiIcon(kind, QColor(QStringLiteral("#64748b")), Qt::transparent, 24);
-    const QPixmap active = drawUiIcon(kind, QColor(QStringLiteral("#6d5ce7")), Qt::transparent, 24);
+    const QPixmap normal = drawUiIcon(kind, QColor(QStringLiteral("#64748b")), Qt::transparent, sp(24));
+    const QPixmap active = drawUiIcon(kind, QColor(QStringLiteral("#6d5ce7")), Qt::transparent, sp(24));
     icon.addPixmap(normal, QIcon::Normal, QIcon::Off);
     icon.addPixmap(active, QIcon::Normal, QIcon::On);
     icon.addPixmap(active, QIcon::Active, QIcon::Off);
@@ -232,8 +293,8 @@
 void applySoftShadow(QWidget *widget, int blurRadius = 24, int yOffset = 7)
 {
     auto *shadow = new QGraphicsDropShadowEffect(widget);
-    shadow->setBlurRadius(blurRadius);
-    shadow->setOffset(0, yOffset);
+    shadow->setBlurRadius(sp(blurRadius));
+    shadow->setOffset(0, sp(yOffset));
     shadow->setColor(QColor(26, 38, 64, 28));
     widget->setGraphicsEffect(shadow);
 }
@@ -251,13 +312,13 @@
     applySoftShadow(card, 22, 6);
 
     auto *layout = new QVBoxLayout(card);
-    layout->setContentsMargins(22, 20, 22, 22);
-    layout->setSpacing(9);
+    layout->setContentsMargins(sp(22), sp(20), sp(22), sp(22));
+    layout->setSpacing(sp(9));
 
     auto *icon = new QLabel(card);
     icon->setObjectName(QStringLiteral("StatIcon"));
-    icon->setFixedSize(48, 48);
-    icon->setPixmap(drawUiIcon(iconKind, iconColor, iconBackground, 48));
+    icon->setFixedSize(sp(48), sp(48));
+    icon->setPixmap(drawUiIcon(iconKind, iconColor, iconBackground, sp(48)));
     icon->setAlignment(Qt::AlignCenter);
 
     auto *titleLabel = new QLabel(title, card);
@@ -285,9 +346,9 @@
     auto *button = new QPushButton(text, parent);
     button->setCheckable(true);
     button->setCursor(Qt::PointingHandCursor);
-    button->setMinimumHeight(50);
+    button->setMinimumHeight(sp(50));
     button->setIcon(buildSidebarIcon(iconKind));
-    button->setIconSize(QSize(22, 22));
+    button->setIconSize(QSize(sp(22), sp(22)));
     button->setObjectName(QStringLiteral("SidebarButton"));
     return button;
 }
@@ -297,8 +358,8 @@
     auto *label = new QLabel(text, parent);
     label->setObjectName(QStringLiteral("FieldLabel"));
     label->setAlignment(Qt::AlignCenter);
-    label->setMinimumHeight(40);
-    label->setMinimumWidth(118);
+    label->setMinimumHeight(sp(40));
+    label->setMinimumWidth(sp(118));
     return label;
 }
 
@@ -316,17 +377,17 @@
 {
     const bool isFolder = share.type == ShareType::Directory || share.type == ShareType::VirtualDirectory;
 
-    QPixmap pixmap(72, 72);
+    QPixmap pixmap(sp(72), sp(72));
     pixmap.fill(Qt::transparent);
 
     QPainter painter(&pixmap);
     painter.setRenderHint(QPainter::Antialiasing, true);
     painter.setPen(Qt::NoPen);
     painter.setBrush(isFolder ? QColor(QStringLiteral("#ffe8a3")) : QColor(QStringLiteral("#cfe9ff")));
-    painter.drawRoundedRect(pixmap.rect(), 20, 20);
+    painter.drawRoundedRect(pixmap.rect(), sp(20), sp(20));
 
     painter.setPen(isFolder ? QColor(QStringLiteral("#cf9600")) : QColor(QStringLiteral("#148fe8")));
-    painter.setFont(QFont(QStringLiteral("Microsoft JhengHei UI"), 24, QFont::Bold));
+    painter.setFont(QFont(QStringLiteral("Microsoft JhengHei UI"), sp(24), QFont::Bold));
     painter.drawText(pixmap.rect(), Qt::AlignCenter, isFolder ? QStringLiteral("D") : QStringLiteral("F"));
     return pixmap;
 }
@@ -412,8 +473,9 @@
     , m_controller(controller)
 {
     setWindowTitle(QStringLiteral("Easy Cloud HFS - 檔案分享伺服器"));
-    resize(1180, 720);
-    setMinimumSize(900, 600);
+    g_uiScale = calculateUiScale();
+    resize(sp(1180), sp(720));
+    setMinimumSize(sp(900), sp(600));
 
     buildUi();
     setupTrayIcon();
@@ -469,7 +531,7 @@
 {
     const AppSettings settings = m_controller->settings();
 
-    QSize targetSize(settings.windowWidth, settings.windowHeight);
+    QSize targetSize(sp(settings.windowWidth), sp(settings.windowHeight));
     if (QScreen *screen = QGuiApplication::primaryScreen()) {
         const QSize available = screen->availableGeometry().size();
         const int maxWidth = qMax(760, available.width() - 24);
@@ -491,8 +553,8 @@
 {
     AppSettings settings = m_controller->settings();
     const QSize storedSize = isMaximized() ? normalGeometry().size() : size();
-    settings.windowWidth = qMax(minimumWidth(), storedSize.width());
-    settings.windowHeight = qMax(minimumHeight(), storedSize.height());
+    settings.windowWidth = qMax(900, qRound(storedSize.width() / g_uiScale));
+    settings.windowHeight = qMax(600, qRound(storedSize.height() / g_uiScale));
     settings.windowMaximized = isMaximized();
     m_controller->saveSystemSettings(settings);
 }
@@ -586,21 +648,21 @@
 {
     auto *sidebar = new QFrame(m_central);
     sidebar->setObjectName(QStringLiteral("Sidebar"));
-    sidebar->setFixedWidth(278);
+    sidebar->setFixedWidth(sp(278));
 
     auto *layout = new QVBoxLayout(sidebar);
-    layout->setContentsMargins(20, 22, 20, 20);
-    layout->setSpacing(10);
+    layout->setContentsMargins(sp(20), sp(22), sp(20), sp(20));
+    layout->setSpacing(sp(10));
 
     auto *brandBox = new QFrame(sidebar);
     brandBox->setObjectName(QStringLiteral("BrandBox"));
     auto *brandLayout = new QVBoxLayout(brandBox);
-    brandLayout->setContentsMargins(8, 8, 8, 16);
-    brandLayout->setSpacing(5);
+    brandLayout->setContentsMargins(sp(8), sp(8), sp(8), sp(16));
+    brandLayout->setSpacing(sp(5));
 
     auto *logo = new QLabel(brandBox);
-    logo->setPixmap(QPixmap(QStringLiteral(":/desktop_logo.png")).scaled(104, 104, Qt::KeepAspectRatio, Qt::SmoothTransformation));
-    logo->setFixedSize(104, 104);
+    logo->setPixmap(QPixmap(QStringLiteral(":/desktop_logo.png")).scaled(sp(104), sp(104), Qt::KeepAspectRatio, Qt::SmoothTransformation));
+    logo->setFixedSize(sp(104), sp(104));
     logo->setAlignment(Qt::AlignCenter);
 
     auto *brandTitle = new QLabel(QStringLiteral("Easy Cloud HFS"), brandBox);
@@ -620,7 +682,7 @@
     brandLayout->addWidget(m_brandSubtitle);
     brandLayout->addWidget(brandVersion);
     layout->addWidget(brandBox);
-    layout->addSpacing(6);
+    layout->addSpacing(sp(6));
 
     auto *buttonGroup = new QButtonGroup(this);
     buttonGroup->setExclusive(true);
@@ -654,14 +716,14 @@
     footer->setObjectName(QStringLiteral("SidebarFooter"));
     applySoftShadow(footer, 20, 5);
     auto *footerLayout = new QVBoxLayout(footer);
-    footerLayout->setContentsMargins(16, 16, 16, 16);
-    footerLayout->setSpacing(9);
+    footerLayout->setContentsMargins(sp(16), sp(16), sp(16), sp(16));
+    footerLayout->setSpacing(sp(9));
 
     auto *statusRow = new QHBoxLayout();
-    statusRow->setSpacing(9);
+    statusRow->setSpacing(sp(9));
     m_statusDot = new QLabel(footer);
     m_statusDot->setObjectName(QStringLiteral("StatusDot"));
-    m_statusDot->setFixedSize(10, 10);
+    m_statusDot->setFixedSize(sp(10), sp(10));
 
     m_statusText = new QLabel(QStringLiteral("伺服器未啟動"), footer);
     m_statusText->setObjectName(QStringLiteral("StatusText"));
@@ -715,12 +777,12 @@
     auto *header = new QFrame(content);
     header->setObjectName(QStringLiteral("Header"));
     auto *headerLayout = new QHBoxLayout(header);
-    headerLayout->setContentsMargins(34, 26, 34, 20);
-    headerLayout->setSpacing(18);
+    headerLayout->setContentsMargins(sp(34), sp(26), sp(34), sp(20));
+    headerLayout->setSpacing(sp(18));
 
     auto *titleLayout = new QVBoxLayout();
     titleLayout->setContentsMargins(0, 0, 0, 0);
-    titleLayout->setSpacing(5);
+    titleLayout->setSpacing(sp(5));
 
     m_pageTitle = new QLabel(header);
     m_pageTitle->setObjectName(QStringLiteral("PageTitle"));
@@ -736,8 +798,8 @@
 
     m_startStopButton = new QPushButton(header);
     m_startStopButton->setCursor(Qt::PointingHandCursor);
-    m_startStopButton->setMinimumHeight(48);
-    m_startStopButton->setMinimumWidth(154);
+    m_startStopButton->setMinimumHeight(sp(48));
+    m_startStopButton->setMinimumWidth(sp(154));
     connect(m_startStopButton, &QPushButton::clicked, this, [this]() {
         if (m_isStoppingServer) {
             return;
@@ -771,12 +833,12 @@
 {
     auto *dashboard = new QWidget(m_pages);
     auto *dashboardLayout = new QVBoxLayout(dashboard);
-    dashboardLayout->setContentsMargins(34, 18, 34, 30);
-    dashboardLayout->setSpacing(24);
+    dashboardLayout->setContentsMargins(sp(34), sp(18), sp(34), sp(30));
+    dashboardLayout->setSpacing(sp(24));
 
     auto *statsGrid = new QGridLayout();
-    statsGrid->setHorizontalSpacing(18);
-    statsGrid->setVerticalSpacing(18);
+    statsGrid->setHorizontalSpacing(sp(18));
+    statsGrid->setVerticalSpacing(sp(18));
     statsGrid->addWidget(makeCard(tx(QStringLiteral("總下載次數"), QStringLiteral("Total Downloads")), &m_totalDownloadsValue, &m_lblTotalDownloadsTitle, UiIcon::Download, QColor(QStringLiteral("#7657e8")), QColor(QStringLiteral("#f0ecff"))), 0, 0);
     statsGrid->addWidget(makeCard(tx(QStringLiteral("總下載流量"), QStringLiteral("Total Data Served")), &m_totalBytesValue, &m_lblTotalBytesTitle, UiIcon::Data, QColor(QStringLiteral("#2f7df4")), QColor(QStringLiteral("#eaf3ff"))), 0, 1);
     statsGrid->addWidget(makeCard(tx(QStringLiteral("目前連線"), QStringLiteral("Active Connections")), &m_activeConnectionsValue, &m_lblActiveConnectionsTitle, UiIcon::Connections, QColor(QStringLiteral("#20a96b")), QColor(QStringLiteral("#e7f8f0"))), 0, 2);
@@ -791,7 +853,7 @@
     infoCard->setObjectName(QStringLiteral("InfoCard"));
     applySoftShadow(infoCard, 24, 7);
     auto *infoLayout = new QVBoxLayout(infoCard);
-    infoLayout->setContentsMargins(26, 24, 26, 24);
+    infoLayout->setContentsMargins(sp(26), sp(24), sp(26), sp(24));
     m_lblServerInfoTitle = new QLabel(tx(QStringLiteral("伺服器運作資訊"), QStringLiteral("Server Information")), infoCard);
     m_lblServerInfoTitle->setObjectName(QStringLiteral("SectionTitle"));
     m_serverInfoLabel = new QLabel(infoCard);
@@ -806,11 +868,11 @@
 
     m_sharePage = new QWidget(m_pages);
     auto *shareLayout = new QVBoxLayout(m_sharePage);
-    shareLayout->setContentsMargins(24, 22, 24, 22);
-    shareLayout->setSpacing(16);
+    shareLayout->setContentsMargins(sp(24), sp(22), sp(24), sp(22));
+    shareLayout->setSpacing(sp(16));
 
     auto *shareHeader = new QHBoxLayout();
-    shareHeader->setSpacing(10);
+    shareHeader->setSpacing(sp(10));
     m_shareExternalLinkCheck = new QCheckBox(tx(QStringLiteral("啟用外部連結"), QStringLiteral("Enable External Link")), m_sharePage);
     m_shareExternalInfoLabel = new QLabel(tx(QStringLiteral("使用 Cloudflare Tunnel 代理"), QStringLiteral("Use Cloudflare Tunnel Proxy")), m_sharePage);
     m_shareExternalInfoLabel->setObjectName(QStringLiteral("ExternalPrefixLabel"));
@@ -818,17 +880,17 @@
     m_shareExternalInfoLabel->setTextFormat(Qt::RichText);
     m_shareExternalInfoLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
     m_shareExternalInfoLabel->setOpenExternalLinks(false);
-    m_shareExternalInfoLabel->setMinimumWidth(300);
-    m_shareExternalInfoLabel->setMaximumWidth(380);
-    m_shareExternalInfoLabel->setMinimumHeight(40);
+    m_shareExternalInfoLabel->setMinimumWidth(sp(300));
+    m_shareExternalInfoLabel->setMaximumWidth(sp(380));
+    m_shareExternalInfoLabel->setMinimumHeight(sp(40));
     m_btnSaveShares = new QPushButton(tx(QStringLiteral("儲存分享"), QStringLiteral("Save Shares")), m_sharePage);
     m_btnSaveShares->setObjectName(QStringLiteral("SecondaryButton"));
     m_btnAddShare = new QPushButton(tx(QStringLiteral("新增分享"), QStringLiteral("Add Share")), m_sharePage);
     m_btnSaveShares->setCursor(Qt::PointingHandCursor);
     m_btnAddShare->setCursor(Qt::PointingHandCursor);
-    m_btnSaveShares->setMinimumHeight(40);
-    m_btnAddShare->setMinimumHeight(42);
-    m_btnAddShare->setMinimumWidth(128);
+    m_btnSaveShares->setMinimumHeight(sp(40));
+    m_btnAddShare->setMinimumHeight(sp(42));
+    m_btnAddShare->setMinimumWidth(sp(128));
     m_shareExternalLinkCheck->setCursor(Qt::PointingHandCursor);
     connect(m_shareExternalLinkCheck, &QCheckBox::toggled, this, [this](bool checked) {
         m_controller->setExternalLinkSettings(checked);
@@ -848,10 +910,10 @@
 
     auto *dropArea = new ShareDropArea(m_sharePage);
     dropArea->setObjectName(QStringLiteral("DropArea"));
-    dropArea->setMinimumHeight(120);
+    dropArea->setMinimumHeight(sp(120));
     auto *dropLayout = new QVBoxLayout(dropArea);
-    dropLayout->setContentsMargins(24, 24, 24, 24);
-    dropLayout->setSpacing(12);
+    dropLayout->setContentsMargins(sp(24), sp(24), sp(24), sp(24));
+    dropLayout->setSpacing(sp(12));
     m_dropTitle = new QLabel(tx(QStringLiteral("可直接拖曳檔案或資料夾到這裡快速連結"), QStringLiteral("Drag and drop files or folders here to share")), dropArea);
     m_dropTitle->setObjectName(QStringLiteral("DropTitle"));
     m_dropTitle->setAlignment(Qt::AlignCenter);
@@ -867,7 +929,7 @@
     auto *listContainer = new QWidget(listScroll);
     m_shareListLayout = new QVBoxLayout(listContainer);
     m_shareListLayout->setContentsMargins(0, 0, 0, 0);
-    m_shareListLayout->setSpacing(12);
+    m_shareListLayout->setSpacing(sp(12));
     listScroll->setWidget(listContainer);
     shareLayout->addWidget(listScroll, 1);
 
@@ -875,22 +937,22 @@
 
     auto *systemPage = new QWidget(m_pages);
     auto *systemLayout = new QVBoxLayout(systemPage);
-    systemLayout->setContentsMargins(34, 28, 34, 28);
-    systemLayout->setSpacing(20);
+    systemLayout->setContentsMargins(sp(34), sp(28), sp(34), sp(28));
+    systemLayout->setSpacing(sp(20));
 
     auto *systemCard = new QFrame(systemPage);
     systemCard->setObjectName(QStringLiteral("InfoCard"));
     applySoftShadow(systemCard, 24, 7);
     auto *systemCardLayout = new QVBoxLayout(systemCard);
-    systemCardLayout->setContentsMargins(28, 26, 28, 28);
-    systemCardLayout->setSpacing(22);
+    systemCardLayout->setContentsMargins(sp(28), sp(26), sp(28), sp(28));
+    systemCardLayout->setSpacing(sp(22));
     m_lblSystemTitle = new QLabel(tx(QStringLiteral("系統設定"), QStringLiteral("System Settings")), systemCard);
     m_lblSystemTitle->setObjectName(QStringLiteral("SectionTitle"));
     systemCardLayout->addWidget(m_lblSystemTitle);
 
     auto *logoRow = new QHBoxLayout();
     m_logoPreview = new QLabel(systemCard);
-    m_logoPreview->setFixedSize(112, 112);
+    m_logoPreview->setFixedSize(sp(112), sp(112));
     m_btnSelectLogo = new QPushButton(tx(QStringLiteral("選擇 Logo"), QStringLiteral("Select Logo")), systemCard);
     m_btnSelectLogo->setObjectName(QStringLiteral("SecondaryButton"));
     m_btnClearLogo = new QPushButton(tx(QStringLiteral("移除 Logo"), QStringLiteral("Remove Logo")), systemCard);
@@ -912,7 +974,7 @@
         m_controller->saveSystemSettings(settings);
     });
     auto *logoButtonsLayout = new QVBoxLayout();
-    logoButtonsLayout->setSpacing(10);
+    logoButtonsLayout->setSpacing(sp(10));
     logoButtonsLayout->addWidget(m_btnSelectLogo);
     logoButtonsLayout->addWidget(m_btnClearLogo);
     logoButtonsLayout->addStretch();
@@ -925,8 +987,8 @@
     auto *form = new QFormLayout();
     form->setLabelAlignment(Qt::AlignCenter);
     form->setFormAlignment(Qt::AlignTop);
-    form->setHorizontalSpacing(20);
-    form->setVerticalSpacing(18);
+    form->setHorizontalSpacing(sp(20));
+    form->setVerticalSpacing(sp(18));
 
     m_siteNameEdit = new QLineEdit(systemCard);
     m_portSpin = new NoWheelSpinBox(systemCard);
@@ -969,13 +1031,13 @@
 
     auto *aboutPage = new QWidget(m_pages);
     auto *aboutLayout = new QVBoxLayout(aboutPage);
-    aboutLayout->setContentsMargins(34, 28, 34, 28);
+    aboutLayout->setContentsMargins(sp(34), sp(28), sp(34), sp(28));
     auto *aboutCard = new QFrame(aboutPage);
     aboutCard->setObjectName(QStringLiteral("InfoCard"));
     applySoftShadow(aboutCard, 24, 7);
     auto *aboutCardLayout = new QVBoxLayout(aboutCard);
-    aboutCardLayout->setContentsMargins(34, 30, 34, 30);
-    aboutCardLayout->setSpacing(18);
+    aboutCardLayout->setContentsMargins(sp(34), sp(30), sp(34), sp(30));
+    aboutCardLayout->setSpacing(sp(18));
     m_lblAboutTitle = new QLabel(tx(QStringLiteral("關於"), QStringLiteral("About")), aboutCard);
     m_lblAboutTitle->setObjectName(QStringLiteral("SectionTitle"));
     m_aboutLabel = new QLabel(aboutCard);
@@ -1129,7 +1191,7 @@
 
 void MainWindow::refreshAbout()
 {
-    m_aboutLabel->setText(tx(
+    m_aboutLabel->setText(scaleStyleSheetPixels(tx(
         QStringLiteral(
             "<div style='font-size:22px; font-weight:700; line-height:1.85;'>"
             "Easy Cloud HFS<br>"
@@ -1184,7 +1246,7 @@
             "<div style='margin-top:24px; font-size:18px; line-height:1.9;'>"
             "This is an independent tool and is not an official Cloudflare product."
             "</div>")
-    ));
+    ), g_uiScale));
 }
 
 void MainWindow::refreshStartStopButton()
@@ -1233,7 +1295,7 @@
         m_statusText->setStyleSheet(QStringLiteral("QLabel#StatusText{font-weight:700;color:%1;}").arg(textColor));
     }
     if (m_statusDot) {
-        m_statusDot->setStyleSheet(QStringLiteral("QLabel#StatusDot{background:%1;border:0;border-radius:5px;}").arg(dotColor));
+        m_statusDot->setStyleSheet(scaleStyleSheetPixels(QStringLiteral("QLabel#StatusDot{background:%1;border:0;border-radius:5px;}").arg(dotColor), g_uiScale));
     }
 }
 
@@ -1272,7 +1334,7 @@
                                      ? QStringLiteral("QLabel{background:#0f1726;color:#617899;border:1px solid #223452;border-radius:14px;padding:10px 14px;font-weight:600;}")
                                      : QStringLiteral("QLabel{background:#f3f6fa;color:#b5c0cf;border:1px solid #e0e7f0;border-radius:14px;padding:10px 14px;font-weight:600;}"));
 
-    m_shareExternalInfoLabel->setStyleSheet(style);
+    m_shareExternalInfoLabel->setStyleSheet(scaleStyleSheetPixels(style, g_uiScale));
 }
 
 void MainWindow::showShareMenu()
@@ -1323,11 +1385,11 @@
         auto *card = new QFrame(m_sharePage);
         card->setObjectName(QStringLiteral("ShareCard"));
         auto *cardLayout = new QHBoxLayout(card);
-        cardLayout->setContentsMargins(16, 12, 16, 12);
-        cardLayout->setSpacing(12);
+        cardLayout->setContentsMargins(sp(16), sp(12), sp(16), sp(12));
+        cardLayout->setSpacing(sp(12));
 
         auto *iconLabel = new QLabel(card);
-        iconLabel->setFixedSize(48, 48);
+        iconLabel->setFixedSize(sp(48), sp(48));
         iconLabel->setPixmap(buildShareIcon(share));
         iconLabel->setScaledContents(true);
 
@@ -1341,12 +1403,12 @@
         typeLabel->setObjectName(QStringLiteral("ShareTypeBadge"));
         typeLabel->setProperty("shareKind", isDirectoryShare(share) ? QStringLiteral("folder") : QStringLiteral("file"));
         typeLabel->setAlignment(Qt::AlignCenter);
-        typeLabel->setMinimumWidth(104);
-        typeLabel->setMinimumHeight(34);
+        typeLabel->setMinimumWidth(sp(104));
+        typeLabel->setMinimumHeight(sp(34));
 
         auto *removeButton = new QPushButton(tx(QStringLiteral("關閉"), QStringLiteral("Close")), card);
         removeButton->setObjectName(QStringLiteral("DangerButton"));
-        removeButton->setMinimumHeight(34);
+        removeButton->setMinimumHeight(sp(34));
 
         connect(removeButton, &QPushButton::clicked, this, [this, share]() {
             const auto reply = QMessageBox::question(this,
@@ -1412,8 +1474,8 @@
     updatedSettings.download.perIpLimitUnit = QStringLiteral("KB/s");
 
     const QSize storedSize = isMaximized() ? normalGeometry().size() : size();
-    updatedSettings.windowWidth = qMax(minimumWidth(), storedSize.width());
-    updatedSettings.windowHeight = qMax(minimumHeight(), storedSize.height());
+    updatedSettings.windowWidth = qMax(900, qRound(storedSize.width() / g_uiScale));
+    updatedSettings.windowHeight = qMax(600, qRound(storedSize.height() / g_uiScale));
     updatedSettings.windowMaximized = isMaximized();
     updatedSettings.clearSharesOnExit = false;
 
@@ -1529,7 +1591,7 @@
                                     "QScrollBar:vertical{background:transparent;width:10px;margin:3px;} QScrollBar::handle:vertical{background:#cfd5df;border-radius:5px;min-height:28px;} QScrollBar::add-line:vertical,QScrollBar::sub-line:vertical{height:0;}"
                                     "QScrollBar:horizontal{background:transparent;height:10px;margin:3px;} QScrollBar::handle:horizontal{background:#cfd5df;border-radius:5px;min-width:28px;} QScrollBar::add-line:horizontal,QScrollBar::sub-line:horizontal{width:0;}");
 
-    qApp->setStyleSheet(style);
+    qApp->setStyleSheet(scaleStyleSheetPixels(style, g_uiScale));
 }