body{
    background: #ffefe1;
}
.nav{
    width: 1200px;
    height: 40px;
    line-height: 40px;
    margin: auto;
    text-align: center;
}
a{
    color: #000;
    text-decoration: none;
    padding: 0 20px;
}
.banner{
    width: 1200px;
    margin: auto;
}
.banner img{
    width: 100%;
}
h2{
    text-align: center;
}
.caidan{
    width: 1200px;
    margin: auto;
}
.item{
    width: 273px;
    display: inline-block;
    margin-right: 30px;
    background: #fff;
    margin-bottom: 30px;
}
img{
    width: 100%;
}
.m{
    margin-right: 0;
}
p{
    padding: 0 12px;
}
.footer{
    padding: 30px;
    text-align: center;
}