.maincontents {
  color: #FFF;
  float: left;
  border-left: 1px solid #393939;
  background: url("../../package/img/bg.jpg") fixed no-repeat center bottom;
  -webkit-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}
.maincontents .nav_rela p:hover {
  -webkit-animation: hover_flash 0.1s linear 2;
  -moz-animation: hover_flash 0.1s linear 2;
  -o-animation: hover_flash 0.1s linear 2;
  animation: hover_flash 0.1s linear 2;
}