body{
    background: url(../images/banner.png) no-repeat top center;
    width: 100%;
    height: auto;
    margin: 0 auto;
    padding: 0;
}
.w1000{
    width: 1000px;
    margin: 0 auto;
}
.first{
    background: url(../images/first_bg.png) no-repeat top center;
    width: 100%;
    height: 246px;
    margin-top: 10px;
}
.first p{
    font-size: 24px;
    width: 896px;
    display: block;
    margin: 0 auto;
    line-height: 40px;
    padding: 20px 0;
}
.second{
    background: url(../images/second_bg.png) no-repeat top center;
    width: 100%;
    height: 108px;
    margin-top: 10px;
}
.second p{
    font-size: 24px;
    width: 896px;
    display: block;
    margin: 0 auto;
    line-height: 40px;
    padding: 25px 0;
}
.third{
    background: url(../images/third_bg.png) no-repeat top center;
    width: 100%;
    height: 556px;
    margin: 10px auto;
}
.third p{
    font-size: 24px;
    width: 896px;
    display: block;
    margin: 0 auto;
    line-height: 47px;
    padding: 3px 0;
}
.third .content {
    width: 100%;
    height: 556px;
    overflow-y: auto;
    margin: 0 auto;
}
.four{
    background: url(../images/last_bg.png) no-repeat top center;
    width: 100%;
    height: 350px;
    margin: 0 auto;
    overflow: hidden;
}
.four ul{
    width: 896px;
    margin: 20px auto;
}
.four ul li{
    font-size: 24px;
    line-height: 50px;
}