<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 按压状态：深灰色背景 -->
    <item android:state_pressed="true">
        <shape android:shape="rectangle">
            <solid android:color="#D0D0D0" />
            <corners android:radius="8dp" /> <!-- 与亮度按钮圆角一致，统一风格 -->
        </shape>
    </item>
    <!-- 正常状态：浅灰色背景 -->
    <item>
        <shape android:shape="rectangle">
            <solid android:color="#F0F0F0" />
            <corners android:radius="8dp" />
        </shape>
    </item>
</selector>

