diff --git a/presentation/shell/nav_rail.py b/presentation/shell/nav_rail.py
index 4d91b7e..07aa154 100644
--- a/presentation/shell/nav_rail.py
+++ b/presentation/shell/nav_rail.py
@@ -251,24 +251,17 @@ class NavRailMixin:
                 blocked = tree.blockSignals(True)
                 tree.addTopLevelItem(it)
                 tree.blockSignals(blocked)
-            # Both destination lists are exactly as tall as their rows; the
-            # stretch in between belongs to RECENTS.
-            #
-            # The frame, and nothing else. A flat ``+ 8`` here used to leave 6px
-            # of dead space under the last row of each list, and because the
-            # Settings button sits DIRECTLY under nav_bottom (nvl has no
-            # spacing), that space landed between Giám sát and Settings only —
-            # so three rows that read as one list were spaced 18/26px. Padding
-            # a row is the item delegate's job; this is the frame's.
+            # Rows plus frame, nothing else: the flat ``+ 8`` this replaces
+            # left 6px of dead space under the last row, and since Settings
+            # sits directly under nav_bottom it fell between Giám sát and
+            # Settings alone — 18/26px for rows that read as one list.
             row_h = 0
             for tree in (self.nav, self.nav_bottom):
                 n = tree.topLevelItemCount()
                 row_h = tree.sizeHintForRow(0) if n else row_h
                 tree.setFixedHeight(n * row_h + 2 * tree.frameWidth())
-            # Settings is one more row of the same list, so it gets the rows'
-            # own height rather than a second set of paddings guessed to match
-            # it — the only way the three stay evenly spaced when the font (and
-            # with it ``sizeHintForRow``) is not the one this was tuned on.
+            # Settings is one more row of the list, so it takes the rows' own
+            # height instead of paddings guessed to match it.
             if row_h and hasattr(self, "_nav_settings_btn"):
                 self._nav_settings_btn.setFixedHeight(row_h)
             if keep:
diff --git a/presentation/shell/rail_metrics.py b/presentation/shell/rail_metrics.py
index 8a4fee9..b949d6c 100644
--- a/presentation/shell/rail_metrics.py
+++ b/presentation/shell/rail_metrics.py
@@ -15,6 +15,11 @@ _NAV_EXPANDED_WIDTH = 232
 _NAV_COLLAPSED_WIDTH = 54
 _NAV_ROW_INSET = 4
 _NAV_ROW_GAP = 6
+# Khe TRÊN nút Cài đặt, tính bằng khoảng trống thật trong layout của rail.
+# Không đặt bằng ``margin`` trong QSS: margin của stylesheet được vẽ BÊN TRONG
+# hộp của widget, mà nút này lại bị ``_rebuild_nav`` ghim đúng chiều cao một
+# dòng menu — nên margin không mua được một pixel khoảng cách nào.
+_NAV_SETTINGS_GAP = 10
 # 132 -> 232: o 132px nhan "Cuoc tro chuyen moi" bi cat mat chu. San phai du
 # rong cho nhan DAI NHAT tren thanh, khong phai cho nhan trung binh.
 _NAV_MIN_WIDTH = 232
diff --git a/presentation/shell/top_bar.py b/presentation/shell/top_bar.py
index 472bad3..0fbcecc 100644
--- a/presentation/shell/top_bar.py
+++ b/presentation/shell/top_bar.py
@@ -35,7 +35,7 @@ class TopBarMixin:
         from PySide6.QtWidgets import QHBoxLayout, QLabel, QPushButton
         from ...i18n import tr
         from ...ui.icons import icon as _icon
-        from .rail_metrics import _NAV_ROW_GAP, _NAV_ROW_INSET
+        from .rail_metrics import _NAV_ROW_GAP, _NAV_ROW_INSET, _NAV_SETTINGS_GAP
 
         # Bottom-pinned group: the places you visit occasionally, kept out of the
         # way of the ones you live in. A hairline (styled via #navrailBottom in
@@ -71,6 +71,12 @@ class TopBarMixin:
         # The first _rebuild_nav() ran before this button existed (it is what
         # fills the list this row belongs under), so take the height here too.
         self._nav_settings_btn.setFixedHeight(self.nav_bottom.sizeHintForRow(0))
+        # Khe TRÊN hàng Cài đặt, xin thẳng từ layout — thanh rail đặt
+        # ``setSpacing(0)`` nên không có khoảng nào sẵn, và margin trong QSS thì
+        # không mua được pixel nào (xem ``_NAV_SETTINGS_GAP``). Cài đặt là việc
+        # khác với nhóm Dashboard/Giám sát ngay trên nó; dán sát vào thì hai thứ
+        # đọc thành một khối.
+        nvl.addSpacing(_NAV_SETTINGS_GAP)
         nvl.addWidget(self._nav_settings_btn)
         self._account_row = self._build_account_row()