.banner{
width: 100%;
height: 720px;
background: url(../img/brain/life_banner.png) no-repeat center;
background-size: 1920px 720px;
}
.bannerBox{
width: 1200px;
margin: 0 auto;
position: relative;
}
.bannerText{
width: 649px;
position: absolute;
left:555px;
top:400px;
}
.yuyue{
width: 148px;
height: 152px;
position: absolute;
z-index: 5;
right: 0;
top: 560px;
}
.Acontent1{
width: 1200px;
margin: 0 auto;
}
.topqiehuanbg{
height: auto;
background: url(../img/background.png) repeat-y center;
background-size: 1920px 578px;
}