diff --git a/app/src/main/kotlin/cn/super12138/todo/ui/TodoDefaults.kt b/app/src/main/kotlin/cn/super12138/todo/ui/TodoDefaults.kt
new file mode 100644
index 0000000..3386031
--- /dev/null
+++ b/app/src/main/kotlin/cn/super12138/todo/ui/TodoDefaults.kt
@@ -0,0 +1,10 @@
+package cn.super12138.todo.ui
+
+import androidx.compose.ui.unit.dp
+
+object TodoDefaults {
+    /**
+     * 屏幕左右两边预留边距（防止内容全部贴边显示过丑）
+     */
+    val screenPadding = 16.dp
+}
\ No newline at end of file
diff --git a/app/src/main/kotlin/cn/super12138/todo/ui/components/FloatingActionButton.kt b/app/src/main/kotlin/cn/super12138/todo/ui/components/FloatingActionButton.kt
index c3b7b27..cea5297 100644
--- a/app/src/main/kotlin/cn/super12138/todo/ui/components/FloatingActionButton.kt
+++ b/app/src/main/kotlin/cn/super12138/todo/ui/components/FloatingActionButton.kt
@@ -10,6 +10,7 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
+import cn.super12138.todo.ui.TodoDefaults
 
 /**
  * 带动画且比 Material 3 内置组件动画好看的的可扩展 FAB
@@ -35,7 +36,7 @@ fun AnimatedExtendedFloatingActionButton(
         modifier = modifier
     ) {
         Row(
-            modifier = Modifier.padding(horizontal = 16.dp),
+            modifier = Modifier.padding(horizontal = TodoDefaults.screenPadding),
             verticalAlignment = Alignment.CenterVertically
         ) {
             icon()
diff --git a/app/src/main/kotlin/cn/super12138/todo/ui/pages/crash/CrashHandler.kt b/app/src/main/kotlin/cn/super12138/todo/ui/pages/crash/CrashHandler.kt
index 028d28f..7ecaecf 100644
--- a/app/src/main/kotlin/cn/super12138/todo/ui/pages/crash/CrashHandler.kt
+++ b/app/src/main/kotlin/cn/super12138/todo/ui/pages/crash/CrashHandler.kt
@@ -1,4 +1,5 @@
 package cn.super12138.todo.ui.pages.crash
+
 import android.content.Context
 import android.content.Intent
 import android.os.Process
diff --git a/app/src/main/kotlin/cn/super12138/todo/ui/pages/crash/CrashPage.kt b/app/src/main/kotlin/cn/super12138/todo/ui/pages/crash/CrashPage.kt
index b204d0a..212d63f 100644
--- a/app/src/main/kotlin/cn/super12138/todo/ui/pages/crash/CrashPage.kt
+++ b/app/src/main/kotlin/cn/super12138/todo/ui/pages/crash/CrashPage.kt
@@ -30,6 +30,7 @@ import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import cn.super12138.todo.R
+import cn.super12138.todo.ui.TodoDefaults
 import cn.super12138.todo.ui.components.AnimatedExtendedFloatingActionButton
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -85,7 +86,7 @@ fun CrashPage(
         Column(
             modifier = Modifier
                 .padding(innerPadding)
-                .padding(horizontal = 16.dp)
+                .padding(horizontal = TodoDefaults.screenPadding)
                 .fillMaxSize()
                 .verticalScroll(scrollState)
         ) {
diff --git a/app/src/main/kotlin/cn/super12138/todo/ui/pages/main/ManagerFragment.kt b/app/src/main/kotlin/cn/super12138/todo/ui/pages/main/ManagerFragment.kt
index 070756d..1a3b0ab 100644
--- a/app/src/main/kotlin/cn/super12138/todo/ui/pages/main/ManagerFragment.kt
+++ b/app/src/main/kotlin/cn/super12138/todo/ui/pages/main/ManagerFragment.kt
@@ -19,6 +19,7 @@ import androidx.compose.ui.unit.dp
 import cn.super12138.todo.R
 import cn.super12138.todo.logic.database.TodoEntity
 import cn.super12138.todo.logic.model.Subjects
+import cn.super12138.todo.ui.TodoDefaults
 import cn.super12138.todo.ui.pages.main.components.TodoCard
 import my.nanihadesuka.compose.LazyColumnScrollbar
 import my.nanihadesuka.compose.ScrollbarSettings
@@ -42,10 +43,7 @@ fun ManagerFragment(
     ) {
         LazyColumn(
             state = state,
-            contentPadding = PaddingValues(
-                start = 10.dp,
-                end = 10.dp,
-            )
+            contentPadding = PaddingValues(horizontal = TodoDefaults.screenPadding)
         ) {
             if (list.isEmpty()) {
                 item {
diff --git a/app/src/main/kotlin/cn/super12138/todo/ui/pages/main/TodoBottomSheet.kt b/app/src/main/kotlin/cn/super12138/todo/ui/pages/main/TodoBottomSheet.kt
index 36f018d..a928148 100644
--- a/app/src/main/kotlin/cn/super12138/todo/ui/pages/main/TodoBottomSheet.kt
+++ b/app/src/main/kotlin/cn/super12138/todo/ui/pages/main/TodoBottomSheet.kt
@@ -33,6 +33,7 @@ import androidx.compose.ui.unit.dp
 import cn.super12138.todo.R
 import cn.super12138.todo.logic.database.TodoEntity
 import cn.super12138.todo.logic.model.Subjects
+import cn.super12138.todo.ui.TodoDefaults
 import cn.super12138.todo.ui.components.FilterChipGroup
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -55,7 +56,7 @@ fun TodoBottomSheet(
         Column(
             horizontalAlignment = Alignment.CenterHorizontally,
             modifier = Modifier
-                .padding(horizontal = 16.dp)
+                .padding(horizontal = TodoDefaults.screenPadding)
                 .verticalScroll(rememberScrollState())
         ) {
             Text(