/* css reset 重置样式 */
body{
    margin: 0;
}
ul{
    padding: 0;
    margin: 0;
}
li{
    list-style: none;
}
a{
    /* text-decoration:none  清除下划线 underline下划线 line-through删除线 */
    text-decoration: none;
}
p{
    margin:0;
}
/* 工具类 */
/* 页面内容宽度 */
.main-width{
    width: 1226px;
    margin: 0 auto;
}
.clearfix::after{
    content: "";
    display: block;
    /* 清除所有方向的浮动 */
    clear: both;
}

/* 顶部导航栏start */
.top-nav{
    background-color: #333;
    color: #b0b0b0;
    height: 40px;
    font-size: 12px;
    line-height: 40px;
}
.top-nav a{
    color: #b0b0b0;
}
.top-nav a:hover{
    color: #fff;
}
.top-nav .left-nav{
    float: left;
}
.top-nav .right-nav{
    float: right;
}
.top-nav .line{
    margin: 0 4px;
    color: #424242;
}
.top-nav .cart{
    background-color: #424242;
    height: 40px;
    display: inline-block;
    padding:0 10px;
}
.top-nav .download-app{
    position: relative;
}
.top-nav .download-app .appcode{
    position: absolute;
    left:50%;
    margin-left: -60px;
    width: 120px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    text-align: center;
    line-height: normal;
    padding: 10px 0;
    display: none;
}
.top-nav .appcode img{
    width: 90px;
    height: 90px;
}
.top-nav .download-app .appcode-text{
    font-size: 14px;
    color: #333;
}
.top-nav .appcode .arr{
    width: 0;
    height: 0;
    border-bottom: 8px solid #fff;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    position: absolute;
    left: 50%;
    margin-left: -8px;
    top:-8px;
}
.top-nav .download-app{
    display: inline-block;
    height: 40px;
}
.top-nav .download-app:hover .appcode{
    display: block;
}
/* 顶部导航栏end */