.main_visual {
  height: 480px;
  background: url(/-/Media/Ricoh/Sites/com/products/mfp/practices-on-accessing-touch-panel/img/bg_mainimage.png) top right no-repeat;
  background-size: cover;
}

.hd02 { overflow: hidden; font-size: 30px; font-weight: bold; }
.hd03 { overflow: hidden; font-size: 26px; font-weight: bold; }
.hd04 { overflow: hidden; font-size: 22px; font-weight: bold; }

@media (max-width: 640px){

.hd02 { font-size: 24px; }
.hd03 { font-size: 22px; }
.hd04 { font-size: 20px; }

  .main_visual {
    height: auto;
    background: transparent;
  }
  .main_contents {
    padding: 0;
  }
  .main_contents .main_txtarea {
      padding: 35px 20px 40px 20px;
      background: url(/-/Media/Ricoh/Sites/com/products/mfp/practices-on-accessing-touch-panel/img/bg_mainimage_sp.png) right top no-repeat;
      background-size: cover;
  }
}