body {
  width: 100%;
  height: 100%;
  min-height: 100vh;
  margin: 0;
  font-family: 'Work Sans', 'Microsoft YaHei', sans-serif;
  font-weight: 400;
}
.background {
  width: 100%;
  height: 100%;
  min-height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
  background: #a741ff;
  background: -moz-linear-gradient(top, #a741ff 0%, #5480fd 100%);
  background: -webkit-linear-gradient(top, #a741ff 0%, #5480fd 100%);
  background: linear-gradient(to bottom, #a741ff 0%, #5480fd 100%);
}
.wrapper {
  width: 80%;
  height: 100%;
  min-height: 800px;
  background: #fff;
  position: absolute;
  left: 50%;
  top: 0;
  margin: 60px 0;
  transform: translate(-50%, 0);
  -webkit-transform: translate(-50%, 0);
  -moz-transform: translate(-50%, 0);
  -webkit-box-shadow: 0px 0px 30px 5px rgba(0,0,0,0.15);
  -moz-box-shadow: 0px 0px 30px 5px rgba(0,0,0,0.15);
  box-shadow: 0px 0px 30px 5px rgba(0,0,0,0.15);
}
.wrapper .header {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background: #81a2ff;
  background: -moz-linear-gradient(top, #81a2ff 0%, #c1e1ff 100%);
  background: -webkit-linear-gradient(top, #81a2ff 0%, #c1e1ff 100%);
  background: linear-gradient(to bottom, #81a2ff 0%, #c1e1ff 100%);
  overflow: hidden;
}
.wrapper .header .logo {
  width: 50px;
  height: auto;
  position: absolute;
  top: 50px;
  left: 100px;
}
.wrapper .header .menu {
  list-style: none;
  margin: 0;
  padding: 0;
  line-height: 33px;
  position: absolute;
  top: 50px;
  right: 100px;
  text-align: right;
  width: auto;
}
.wrapper .header .menu li {
  display: inline-block;
  margin: 0 10px;
  color: #fff;
}
.wrapper .header .content {
  position: absolute;
  width: 100%;
  height: auto;
  max-width: 800px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -85%);
}
.wrapper .header .content h2 {
  color: #fff;
  margin: 0;
  font-size: 2.3em;
  line-height: 1.2em;
  width: 100%;
  text-align: center;
}
.wrapper .header .content .buttons {
  width: 100%;
  text-align: center;
  margin: 0;
  padding: 0;
}
.wrapper .header .content .button {
  display: inline-block;
  width: 150px;
  height: 50px;
  padding-left: 20px;
  background: #000;
  color: #fff;
  font-size: 1.2em;
  text-decoration: none;
  text-align: center;
  line-height: 50px;
  margin: 40px 5px 0;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  border-radius: 5px;
  -webkit-box-shadow: 0px 12px 20px -10px rgba(0,0,0,0.65);
  -moz-box-shadow: 0px 12px 20px -10px rgba(0,0,0,0.65);
  box-shadow: 0px 12px 20px -10px rgba(0,0,0,0.65);
  transition: box-shadow 0.5s;
}
.wrapper .header .content .button:hover {
  -webkit-box-shadow: 0px 0px 20px -10px rgba(0,0,0,0.65);
  -moz-box-shadow: 0px 0px 20px -10px rgba(0,0,0,0.65);
  box-shadow: 0px 0px 20px -10px rgba(0,0,0,0.65);
  transition: box-shadow 0.5s;
}
.wrapper .header .content .button.apple {
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M17.05 20.28c-.98.95-2.05.8-3.08.35-1.09-.46-2.09-.48-3.24 0-1.44.62-2.2.44-3.06-.35C2.79 15.25 3.51 7.59 9.05 7.31c1.35.07 2.29.74 3.08.8 1.18-.24 2.31-.93 3.57-.84 1.51.12 2.65.72 3.4 1.8-3.12 1.87-2.38 5.98.48 7.13-.57 1.5-1.31 2.99-2.54 4.09l.01-.01zM12.03 7.25c-.15-2.23 1.66-4.07 3.74-4.25.29 2.58-2.34 4.5-3.74 4.25z"/></svg>');
  background-size: 28px auto;
  background-repeat: no-repeat;
  background-position: 15px center;
}
.wrapper .header .content .button.windows {
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M3,12V6.75L9,5.43V11.91L3,12M20,3V11.75L10,11.9V5.21L20,3M3,13L9,13.09V19.9L3,18.75V13M20,13.25V22L10,20.09V13.1L20,13.25Z"/></svg>');
  background-size: 28px auto;
  background-repeat: no-repeat;
  background-position: 15px center;
}
.wrapper .header .waves {
  width: calc(100% + 10px);
  height: auto;
  position: absolute;
  bottom: -3px;
  left: 50%;
  transform: translate(-50%, 0);
  -webkit-transform: translate(-50%, 0);
  -moz-transform: translate(-50%, 0);
  z-index: 0;
}
.wrapper .header .curve {
  display: none;
  width: calc(100% + 10px);
  height: auto;
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translate(-50%, 0);
  -webkit-transform: translate(-50%, 0);
  -moz-transform: translate(-50%, 0);
  z-index: 1;
}