css伪元素实现方框上面打钩

html：

 <p class="skill_three_con_item_frame"></p>
 

css:

skill_three_con_item_frame {
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid #fff;
  position: relative;
  margin-right: 30px;
}
.skill_three_con_item_frame:before,
.skill_three_con_item_frame::after {
  content: "";
  height: 50px;
  width: 6px;
  border-radius: 10px;
  display: block;
  background: #ff003f;
  position: absolute;
  top: -18px;
  left: 32px;
  transform: rotate(45deg);
  -ms-transform: rotate(45deg);
}
.skill_three_con_item_frame::before {
  height: 24px;
  transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  position: absolute;
  top: 6px;
  left: 8px;
}