.clearfix {
  zoom: 1;
}

.clearfix::after {
  display: block;
  content: "";
  height: 0;
  line-height: 0;
  visibility: hidden;
  clear: both;
}

.p-css-tips {
  text-align: center;
}
.p-css-tips h1 {
  margin: 2.66667vw 0;
}
.p-css-tips h2 {
  margin-bottom: 1.33333vw;
}
.p-css-tips h3 {
  margin: 2.66667vw 0;
}
.p-css-tips .flex-left-center-right {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
}
.p-css-tips .flex-left-center-right .left {
  width: 13.33333vw;
  height: 13.33333vw;
  background: yellow;
}
.p-css-tips .flex-left-center-right .center {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
          flex: 1;
  height: 13.33333vw;
  background: blue;
}
.p-css-tips .flex-left-center-right .right {
  width: 13.33333vw;
  height: 13.33333vw;
  background: green;
}
.p-css-tips .float-left-center-right .left {
  float: left;
  width: 13.33333vw;
  height: 13.33333vw;
  background: yellow;
}
.p-css-tips .float-left-center-right .right {
  float: right;
  width: 13.33333vw;
  height: 13.33333vw;
  background: green;
}
.p-css-tips .float-left-center-right .center {
  margin-left: 13.33333vw;
  margin-right: 13.33333vw;
  height: 13.33333vw;
  background: blue;
}
.p-css-tips .table-left-center-right {
  display: table;
  table-layout: fixed;
  width: 100%;
}
.p-css-tips .table-left-center-right .left,
.p-css-tips .table-left-center-right .center,
.p-css-tips .table-left-center-right .right {
  display: table-cell;
  height: 13.33333vw;
}
.p-css-tips .table-left-center-right .left,
.p-css-tips .table-left-center-right .right {
  width: 13.33333vw;
}
.p-css-tips .table-left-center-right .left {
  background: yellow;
}
.p-css-tips .table-left-center-right .center {
  background: blue;
}
.p-css-tips .table-left-center-right .right {
  background: green;
}