diff --git a/src/app/login/LoginWindow.cpp b/src/app/login/LoginWindow.cpp
index 3002e92..3b6fcea 100644
--- a/src/app/login/LoginWindow.cpp
+++ b/src/app/login/LoginWindow.cpp
@@ -77,11 +77,20 @@ LoginWindow::LoginWindow(geopro::net::AuthService& auth, QWidget* parent)
     : QDialog(parent), auth_(auth)
 {
     setWindowTitle(QStringLiteral("Geopro 3.0 登录"));
-    setFixedSize(360, 300);
-    setStyleSheet(QStringLiteral("QDialog { background: #F5F7FD; }"));
+    setFixedSize(380, 320);
+    // 显式样式：QLineEdit 在所有状态都白底深字+边框(否则失焦时文字色取调色板默认、与背景相近不可见)。
+    setStyleSheet(QStringLiteral(
+        "QDialog { background: #F5F7FD; }"
+        "QLabel { color: #2B3A55; }"
+        "QLineEdit {"
+        "  background: #FFFFFF; color: #1F2A3D;"
+        "  border: 1px solid #C7D2E0; border-radius: 5px; padding: 6px 9px;"
+        "  selection-background-color: #3A6EA5; selection-color: #FFFFFF; }"
+        "QLineEdit:focus { border: 1px solid #3A6EA5; }"
+        "QLineEdit:disabled { background: #F0F2F6; color: #8A93A3; }"));
 
     auto* root = new QVBoxLayout(this);
-    root->setContentsMargins(28, 22, 28, 22);
+    root->setContentsMargins(30, 24, 30, 24);
     root->setSpacing(14);
 
     auto* title = new QLabel(QStringLiteral("Geopro 3.0 登录"), this);