.dv-border-box-1 {
  position: relative;
  width: 100%;
  height: 100%;
}
.dv-border-box-1 .border {
  position: absolute;
  display: block;
}
.dv-border-box-1 .right-top {
  right: 0px;
  transform: rotateY(180deg);
}
.dv-border-box-1 .left-bottom {
  bottom: 0px;
  transform: rotateX(180deg);
}
.dv-border-box-1 .right-bottom {
  right: 0px;
  bottom: 0px;
  transform: rotateX(180deg) rotateY(180deg);
}
.dv-border-box-1 .border-box-content {
  position: relative;
  width: 100%;
  height: 100%;
}