*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: '微软雅黑';
}
a{
    text-decoration: none;
    color: #000;

}
li{
    list-style: none;
}
.w{
    width: 1200px;
    margin: 0 auto;
}
input{ 
    outline:none;
}
i,em{
    font-style: normal;
}
/*body{
    height: 3000px;
}*/
.clear {
    clear: both;
}


.banner img {
    display: block;
    width: 100%;
    height: auto;
}