边框四边包角样式

边框四边包角样式

.border-wrap {
  position: relative;
  height: 100%;
  padding: 5px;
}

.border_corner {
  position: absolute;
  background: rgba(0, 0, 0, 0);
  border: 3px solid #00FAFF;
}

.border_corner_left_top {
  width: var(--width);
  height: var(--height);
  top: 0;
  left: 0;
  border-right: none;
  border-bottom: none;
  border-top-left-radius: 10px;
}

.border_corner_right_top {
  width: var(--width);
  height: var(--height);
  top: 0;
  right: 0;
  border-left: none;
  border-bottom: none;
  border-top-right-radius: 10px;
}

.border_corner_left_bottom {
  width: var(--width);
  height: var(--height);
  bottom: 0;
  left: 0;
  border-right: none;
  border-top: none;
  border-bottom-left-radius: 10px;
}

.border_corner_right_bottom {
  width: var(--width);
  height: var(--height);
  bottom: 0;
  right: 0;
  border-left: none;
  border-top: none;
  border-bottom-right-radius: 10px;
}

<div class="alarm-wrap border-wrap">
    <div class="border_corner border_corner_left_top" style="--width: 50px;--height:200px"></div>
    <div class="border_corner border_corner_right_top" style="--width: 10px;--height:50px"></div>
    <div class="border_corner border_corner_left_bottom" style="--width: 20px;--height:50px"></div>
    <div class="border_corner border_corner_right_bottom" style="--width: 100px;--height:100px"></div>
</div>