显示效果:

向右箭头我 图片是来自:iconfont-阿里巴巴矢量图
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>小米商城导航侧边栏title>
<style>
#nav {
background-color: #9e9c9d;
width: 250px;
height: 430px;
/*距离上个盒子的上边有10px*/
padding-top: 10px;
/*距离上个盒子的底部有10px*/
padding-bottom: 10px;
}
a {
display: block;
background-color: #9e9c9d;
width: 250px;
height: 42px;
color: #edeeee;
text-decoration: none;
/* 单行文字垂直居中 */
line-height: 42px;
text-indent: 2em;
background-image: url(arrow-right.png);
/*背景图片位置*/
background-position: center right;
/*背景图片是否平铺*/
background-repeat: no-repeat;
/*背景图片大小*/
background-size: 16px;
/*背景图片x轴的距离*/
background-position-x: 210px;
}
a:hover {
background-color: #ff6700;
}
style>
head>
<body>
<div id="lyx">
<div id="nav">
<a href="#">手机a>
<a href="#">电脑 a>
<a href="#">笔记本 平板a>
<a href="#">家电 a>
<a href="#">出行 穿戴a>
<a href="#">智能 路由器a>
<a href="#">电源 配件 a>
<a href="#">健康 儿童a>
<a href="#">耳机 音箱 a>
<a href="#">生活 箱包 a>
div>
div>
body>
html>
显示效果:

DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Documenttitle>
<link rel="stylesheet" href="style.css">
<style>
a {
display: block;
text-decoration: none;
width: 250px;
height: 42px;
background-color: rgb(133, 128, 128);
color: rgb(253, 247, 247);
line-height: 42px;
text-indent: 2em;
}
a:hover {
background-color: rgb(223, 115, 27);
}
.nav::after {
content: '\276F';
font-size: 20px;
float: right;
padding-right: 40px;
}
style>
head>
<body>
<div>
<a href="#">
手机
<span class="nav">
span>
a>
<a href="#">
电脑 笔记本
<span class="nav">
span>
a>
<a href="#">
家电 洗衣机
<span class="nav">
span>
a>
div>
body>
html>