main#intro {
    background:url(../img/sub_bg01.jpg) no-repeat center;
    background-size:cover;
    height:500px;
}

main#info section {
    background:url(../img/rsotrm.png) right bottom no-repeat;
    background-size:50%;
}

main#tech section div {
    padding-bottom:20px;
}

main#tech section div img {
    width:70%;
  }
  
  main#tech02 section div img {
      width:80%;
  }
  main#space section div {
      border-radius:500px;
      overflow:hidden;
  }
  main#space section div img {
      width:100%;
 }