#i1900 {
  background-image:url(../image/top/main01_pc.jpg);
  background-repeat:no-repeat;background-size:cover;background-position:center center;
}
#i1900 > div {
  text-align:center;
}
#i1899 {
  background-repeat:no-repeat;background-size:cover;background-position:center center;
}
#i1909 {
  background-repeat:no-repeat;background-size:cover;background-position:center center;
}
#i1910 dl dt {
  background-color:#0e4491;
}