关于#el-menu#的问题：箭头溢出？

el-menu多级菜单显示问题
```<template>

    <div  class="right">
        <h1>首页</h1>
        <el-menu
        active-text-color="#ffd04b"
        background-color="#545c64"
        class="el-menu-vertical-demo"
        default-active="2"
        text-color="#fff"

        >
            <el-sub-menu index="1-4">
            <template #title>item four</template>
            <el-menu-item index="1-4-1">item one</el-menu-item>
            </el-sub-menu>
        </el-menu>
    </div>

    <!-- <div class="left">
        <div class="navigation">this iss myadmin</div>
        <div class="content">this iss myadmin</div>
    </div> -->
</template>

img

为什么箭头标签会变这么大个？

设置一下font-size

img