.banner{
  width: 100%;
  height: 330px;
  background: url(../img/m.jpeg);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}
.detail{
  margin-top: -30px;
  background: #fff;
  padding: 0 20px 40px;
}
h2{
  height: 60px;
  line-height: 60px;
}
p{
  color:#666;
  line-height: 24px;
}
p img{
  width: 900px;
  margin:20px 80px;
}

.to-index{
  position: fixed;
  right: 0;
  bottom: 40px;
  width: 40px;
  height: 40px;
  border: 1px solid #999;
  border-radius: 10px;
  text-align: center;
  background:#f8f8f8;
}