* 
{
    margin:0px; 
    padding:0px;
    box-sizing: border-box;
    font-size: 14px;
}
body 
{
    line-height:1.5;
    font-family:微软雅黑;
}
a{ text-decoration:none;}
ul,li{ list-style:none; } 
.w1000 
{
    width:1000px; 
    margin:40px auto; 
}
.menu 
{
    width: 200px;
} 
.menu h3 {
    height: 50px;
    line-height: 50px;
    border-bottom: 1px solid #000000;
    font-size: 16px;
    color: #000000;
    cursor: pointer;
    padding: 0px 30px 0 30px; 
}
.menu h3.on {
    background: #0084ff;
    color: #fff;
    border-bottom: 0px;
}
.menu ul {
    padding: 10px 30px;
    color: #999;
    display: none;
    background: #eeeeee;
    border-bottom: 1px solid #000000;
}
.menu ul li a {
    font-size: 15px;
    color: #313131;
    line-height:2;
}