diff --git a/src/gui/styles.py b/src/gui/styles.py
index fc9661f..407b6e0 100644
--- a/src/gui/styles.py
+++ b/src/gui/styles.py
@@ -212,6 +212,51 @@ class ModernStylesheet:
             }}
             QScrollBar::handle:vertical:hover {{ background: {cls.COLORS['text_secondary']}; }}
             QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {{ height: 0px; }}
+
+            /* 水平滚动条 (与垂直滚动条统一配色, 8px 高度, 圆角 4px) */
+            QScrollBar:horizontal {{
+                border: none;
+                background: transparent;
+                height: 8px;
+                margin: 0px;
+            }}
+            QScrollBar::handle:horizontal {{
+                background: {cls.COLORS['border']};
+                min-width: 20px;
+                border-radius: 4px;
+            }}
+            QScrollBar::handle:horizontal:hover {{ background: {cls.COLORS['text_secondary']}; }}
+            QScrollBar::handle:horizontal:pressed {{ background: {cls.COLORS['text_primary']}; }}
+            QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal {{ width: 0px; }}
+
+            /* ========================================= */
+            /* 彻底消灭 Windows 原生弹窗 (全局 QMessageBox) */
+            /* ========================================= */
+            QMessageBox {{
+                background-color: #FFFFFF; /* 强制统一纯白底色，干掉恶心的上下两截色 */
+                border: 1px solid #E2E8F0;
+            }}
+            QMessageBox QLabel {{
+                color: #2D3748; /* 深灰文字，舒适阅读 */
+                background: transparent;
+                font-size: 13px;
+            }}
+            QMessageBox QPushButton {{
+                background-color: #0078D7; /* 统一成你最爱的 Primary 蓝色按钮 */
+                color: white;
+                border: none;
+                border-radius: 4px;
+                padding: 6px 24px;
+                font-weight: bold;
+                min-width: 60px;
+                min-height: 24px;
+            }}
+            QMessageBox QPushButton:hover {{
+                background-color: #005A9E; /* 绝美悬停反馈 */
+            }}
+            QMessageBox QPushButton:pressed {{
+                background-color: #004578;
+            }}
             """
 
     @classmethod