diff --git a/app/src/main/java/com/example/defenseapplication/adapter/MessageListAdapter.kt b/app/src/main/java/com/example/defenseapplication/adapter/MessageListAdapter.kt
new file mode 100644
index 0000000..f6fa5c4
--- /dev/null
+++ b/app/src/main/java/com/example/defenseapplication/adapter/MessageListAdapter.kt
@@ -0,0 +1,84 @@
+package com.example.defenseapplication.adapter
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import com.example.defenseapplication.databinding.ItemMessageGroupTitleBinding
+import com.example.defenseapplication.databinding.ItemMessageNoticeBinding
+
+sealed class MessageListItem {
+    data class Header(val title: String) : MessageListItem()
+    data class Message(
+        val time: String,
+        val title: String,
+        val dateTime: String,
+        val unread: Boolean
+    ) : MessageListItem()
+}
+
+class MessageListAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+    private val items = mutableListOf<MessageListItem>()
+
+    fun submitList(list: List<MessageListItem>) {
+        items.clear()
+        items.addAll(list)
+        notifyDataSetChanged()
+    }
+
+    override fun getItemViewType(position: Int): Int {
+        return when (items[position]) {
+            is MessageListItem.Header -> TYPE_HEADER
+            is MessageListItem.Message -> TYPE_MESSAGE
+        }
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        return if (viewType == TYPE_HEADER) {
+            val binding = ItemMessageGroupTitleBinding.inflate(
+                LayoutInflater.from(parent.context),
+                parent,
+                false
+            )
+            HeaderViewHolder(binding)
+        } else {
+            val binding = ItemMessageNoticeBinding.inflate(
+                LayoutInflater.from(parent.context),
+                parent,
+                false
+            )
+            MessageViewHolder(binding)
+        }
+    }
+
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        when (holder) {
+            is HeaderViewHolder -> holder.bind(items[position] as MessageListItem.Header)
+            is MessageViewHolder -> holder.bind(items[position] as MessageListItem.Message)
+        }
+    }
+
+    override fun getItemCount(): Int = items.size
+
+    private class HeaderViewHolder(private val binding: ItemMessageGroupTitleBinding) :
+        RecyclerView.ViewHolder(binding.root) {
+        fun bind(item: MessageListItem.Header) {
+            binding.tvGroupTitle.text = item.title
+        }
+    }
+
+    private class MessageViewHolder(private val binding: ItemMessageNoticeBinding) :
+        RecyclerView.ViewHolder(binding.root) {
+        fun bind(item: MessageListItem.Message) {
+            binding.tvTime.text = item.time
+            binding.tvTitle.text = item.title
+            binding.tvDateTime.text = item.dateTime
+            binding.unreadDot.visibility = if (item.unread) View.VISIBLE else View.INVISIBLE
+        }
+    }
+
+    companion object {
+        private const val TYPE_HEADER = 0
+        private const val TYPE_MESSAGE = 1
+    }
+}
diff --git a/app/src/main/res/drawable/bg_detail_border.xml b/app/src/main/res/drawable/bg_detail_border.xml
new file mode 100644
index 0000000..ec78199
--- /dev/null
+++ b/app/src/main/res/drawable/bg_detail_border.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="#E6FBF2" />
+    <corners android:radius="30dp" />
+</shape>
diff --git a/app/src/main/res/drawable/bg_logout_button.xml b/app/src/main/res/drawable/bg_logout_button.xml
new file mode 100644
index 0000000..6051baf
--- /dev/null
+++ b/app/src/main/res/drawable/bg_logout_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="@android:color/transparent" />
+    <corners android:radius="6dp" />
+    <stroke
+        android:width="1dp"
+        android:color="#8F8F8F" />
+</shape>
diff --git a/app/src/main/res/drawable/bg_personal_header_gradient.xml b/app/src/main/res/drawable/bg_personal_header_gradient.xml
new file mode 100644
index 0000000..df6ef08
--- /dev/null
+++ b/app/src/main/res/drawable/bg_personal_header_gradient.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <gradient
+        android:angle="0"
+        android:endColor="#CFF3FF"
+        android:startColor="#E8DFEE" />
+</shape>
diff --git a/app/src/main/res/drawable/bg_unread_dot.xml b/app/src/main/res/drawable/bg_unread_dot.xml
new file mode 100644
index 0000000..a72929e
--- /dev/null
+++ b/app/src/main/res/drawable/bg_unread_dot.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval">
+    <size
+        android:width="8dp"
+        android:height="8dp" />
+    <solid android:color="#E75A6B" />
+</shape>
diff --git a/app/src/main/res/layout/item_message_group_title.xml b/app/src/main/res/layout/item_message_group_title.xml
new file mode 100644
index 0000000..ada2fd2
--- /dev/null
+++ b/app/src/main/res/layout/item_message_group_title.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/tvGroupTitle"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginTop="16dp"
+    android:layout_marginBottom="10dp"
+    android:textColor="#666666"
+    android:textSize="16sp"
+    android:textStyle="bold"
+    tools:text="今天" />
diff --git a/app/src/main/res/layout/item_message_notice.xml b/app/src/main/res/layout/item_message_notice.xml
new file mode 100644
index 0000000..5246727
--- /dev/null
+++ b/app/src/main/res/layout/item_message_notice.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginBottom="10dp"
+    android:background="@drawable/round_bg"
+    android:minHeight="60dp"
+    android:paddingStart="16dp"
+    android:paddingTop="14dp"
+    android:paddingEnd="16dp"
+    android:paddingBottom="12dp">
+
+    <TextView
+        android:id="@+id/tvTime"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textColor="#2B2B2B"
+        android:textSize="16dp"
+        android:textStyle="bold"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:text="15:54" />
+
+    <TextView
+        android:id="@+id/tvTitle"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="10dp"
+        android:ellipsize="end"
+        android:maxLines="1"
+        android:textColor="#2B2B2B"
+        android:textSize="16dp"
+        android:textStyle="bold"
+        app:layout_constraintBottom_toBottomOf="@id/tvTime"
+        app:layout_constraintEnd_toStartOf="@id/unreadDot"
+        app:layout_constraintStart_toEndOf="@id/tvTime"
+        app:layout_constraintTop_toTopOf="@id/tvTime"
+        tools:text="有人入侵" />
+
+    <TextView
+        android:id="@+id/tvDateTime"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="6dp"
+        android:textColor="#B2B2B2"
+        android:textSize="14dp"
+        app:layout_constraintEnd_toStartOf="@id/ivDetail"
+        app:layout_constraintStart_toStartOf="@id/tvTime"
+        app:layout_constraintTop_toBottomOf="@id/tvTime"
+        tools:text="2026-05-06 15:54:25" />
+
+    <View
+        android:id="@+id/unreadDot"
+        android:layout_width="8dp"
+        android:layout_height="8dp"
+        android:layout_marginEnd="8dp"
+        android:background="@drawable/bg_unread_dot"
+        app:layout_constraintBottom_toBottomOf="@id/ivDetail"
+        app:layout_constraintEnd_toStartOf="@id/ivDetail"
+        app:layout_constraintTop_toTopOf="@id/ivDetail" />
+
+    <ImageView
+        android:id="@+id/ivDetail"
+        android:layout_width="24dp"
+        android:layout_height="24dp"
+        android:background="@drawable/bg_detail_border"
+        android:padding="5dp"
+        android:src="@drawable/right_back"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>