 .l::before {
      position: absolute;
      content: "";
      width: 95%;
      height: 5px;
      left: 0;
      top: 25%;
      border: 1px solid #52c5ff;
      overflow: hidden;
    }
  }

  .container:nth-child(1) .b::before,
  .container:nth-child(4) .b::before {
    position: absolute;
    content: "";
    width: 95%;
    z-index: -1;
    height: 5px;
    left: 0;
    top: 69%;
    border: 0;
    border: 1px solid #52c5ff;
    overflow: hidden;
  }

  .f {
    transform: rotateY(0deg) translateZ(15