.border_all {
  position: relative
}
.border_all:after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 200%;
  border: 1px solid #ddd;
  box-sizing: border-box;
  -webkit-transform-origin: 0 0;
  transform-origin: 0 0;
  -webkit-transform: scale(.5);
  transform: scale(.5);
  z-index: 2;
  border-radius: 8px;
}

.border_t {
  position: relative
}
.border_t:before {
  z-index: 2;
  content: "";
  position: absolute;
  background-color: #ddd;
  display: block;
  left: 0;
  top:0;
  right: 0;
  height: 1px;
  width: 100%;
  transform-origin: 100% 50%;
  -webkit-transform: scaleY(.5) translateY(100%);
  transform: scaleY(.5) translateY(100%);
}

.border_b {
  position: relative
}
.border_b:after {
  z-index: 2;
  content: "";
  position: absolute;
  background-color: #ddd;
  display: block;
  left: 0;
  bottom:0;
  right: 0;
  height: 1px;
  width: 100%;
  transform-origin: 100% 50%;
  -webkit-transform: scaleY(.5) translateY(100%);
  transform: scaleY(.5) translateY(100%);
}
.border_l {
  position: relative
}
.border_l:before {
  content: "";
  position: absolute;
  background-color: #ddd;
  display: inline-block;
  left: 0;
  top:0;
  bottom:0;
  width: 1px;
  -webkit-transform: scaleX(.5);
  transform: scaleX(.5);
}

.border_r {
  position: relative
}
.border_r:after {
  content: "";
  position: absolute;
  background-color: #ddd;
  display: inline-block;
  right:0;
  top:0;
  bottom:0;
  width: 1px;
  -webkit-transform: scaleX(.5);
  transform: scaleX(.5);
}

.arrow_r {
    position: relative;
}