页面的head部分，除了使用了:before和:after的CSS选择器外，还用了比较多的关键帧动画，部分代码如下：

body {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  height: 100vh;
  background-color: #222a30;
}

p {
  margin-top: 50px;
  font-family: 'Microsoft YaHei','Lantinghei SC','Open Sans',Arial,'Hiragino Sans GB','STHeiti','WenQuanYi Micro Hei','SimSun',sans-serif;
  letter-spacing: 12px;
  text-indent: 12px;
  color: #ffffff;
  -webkit-animation: colorText 5s ease-out infinite, nudgeText 5s ease-out infinite;
          animation: colorText 5s ease-out infinite, nudgeText 5s ease-out infinite;
}

.mouse {
  background: #4e5559 -webkit-linear-gradient(transparent 0%, transparent 50%, #ffffff 50%, #ffffff 100%);
  background: #4e5559 linear-gradient(transparent 0%, transparent 50%, #ffffff 50%, #ffffff 100%);
  position: relative;
  width: 52px;
  height: 88px;
  background-size: 100% 100%;
  border-radius: 100px;
  background-size: 225%;
  -webkit-animation: colorSlide 5s linear infinite, nudgeMouse 5s ease-out infinite;
          animation: colorSlide 5s linear infinite, nudgeMouse 5s ease-out infinite;
}
.mouse:before, .mouse:after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
}
.mouse:before {
  width: 46px;
  height: 82px;
  background-color: #222a30;
  border-radius: 100px;
}
.mouse:after {
  background-color: #ffffff;
  width: 10px;
  height: 10px;
  border-radius: 100%;
  -webkit-animation: trackBallSlide 5s linear infinite;
          animation: trackBallSlide 5s linear infinite;
}

@-webkit-keyframes colorSlide {
  0% {
    background-position: 0% 100%;
  }
  20% {
    background-position: 0% 0%;
  }
  21% {
    background-color: #4e5559;
  }
  29.99% {
    background-color: #ffffff;
    background-position: 0% 0%;
  }
  30% {
    background-color: #4e5559;
    background-position: 0% 100%;
  }
  50% {
    background-position: 0% 0%;
  }
  51% {
    background-color: #4e5559;
  }
  59.99% {
    background-color: #ffffff;
    background-position: 0% 0%;
  }
  60% {
    background-color: #4e5559;
    background-position: 0% 100%;
  }
  80% {
    background-position: 0% 0%;
  }
  81% {
    background-color: #4e5559;
  }
  89.99%, 100% {
    background-color: #ffffff;
  }
}

页面的body部分，一个div容器放鼠标滚动动画，另一个p标签显示文字提示内容，代码如下：

<div class="mouse"></div>
<p>鼠标滚动</p>