.animation-section {
  margin-top: 0;
  width: 100%;
  max-width: 100%;
}
.half-width {
  display: block;
  padding: 0;
  margin: 0;
  width: 50%;
  float: left;
}
.clearfix:after {
  content: ".";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}
.clearfix {
  height: 1%;
}
.block {
  position: relative;
  display: block;
  margin: 0 auto;
  width: 300px;
  height: 300px;
  border: 1px solid black;
}
.tips {
  text-align: center;
  margin-top: 120px;
}
.block-overflow-hidden {
  position: relative;
  display: block;
  margin: 0 auto;
  width: 300px;
  height: 300px;
  border: 1px solid black;
  overflow: hidden;
}
.wave {
  position: absolute;
  margin: -5px 0 0 -5px;
  display: block;
  width: 10px;
  height: 10px;
  border: 1px solid #eee;
  border-radius: 50%;
  left: 50%;
  top: 50%;
}