小编aas*_*yak的帖子

.rr > div {
  text-align: center;
}

.rr {
  position: relative;
  height: 200px;
  background: #232E39;
}
.rr.rr-left {
  z-index: 1;
  float: left;
  width: 90%;
}
.rr.rr-right {
  z-index: 2;
  float: right;
  width: 10%;
}

.rr:after,
.rr:before {
  content: "";
  position: absolute;
  top: 0;
  width: 0;
  height: 0;
}

.rr-left:after {
  right: 0;
  border-left: 100px solid #232E39;
  border-bottom: 200px solid #dcdcdc;
}

.rr-right:before {
  left: -100px;
  border-right: 100px solid #232E39;
  border-top: 200px solid transparent;
}

.rr-left > div { …