.box-container {
  position: relative;
  background: #327443
    url("https://cdn.julyedu.com/newyear20/PC/sd_nr_bj2.png")
    repeat-y;
  background-size: 100% auto;
  padding: 14px 0;

  .image-box {
    height: 100%;
  }

  @mixin common-deco($bg) {
    content: "";
    position: absolute;
    left: 0;
    width: 100%;
    height: 14px;
    display: block;
    background: url($bg) no-repeat;
    background-size: 375px auto;
  }

  &::before {
    @include common-deco(
      "https://cdn.julyedu.com/newyear20/PC/sd_nr_bj1.png"
    );
    top: 0;
  }

  &::after {
    @include common-deco(
      "https://cdn.julyedu.com/newyear20/PC/sd_nr_bj3.png"
    );
    bottom: 0;
  }
}
