/* ------------------------------------------
 * IT书包
 * 网址：www.itshubao.com
 * 整理：yinq<3331653644@qq.com> 
 -------------------------------------------- */
*,
*:after,
*:before {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  font-size: 100%;
  font-family: 'Microsoft YaHei', sans-serif;
  background-color: #150811;
  height: 100vh;
}

a {
  text-decoration: none;
}

.Button__textWrapper, .Button__text, .Button__icon {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
}

.Button__text, .Button__icon {
  -webkit-transition: top 500ms;
  transition: top 500ms;
}

.Button {
  display: inline-block;
  position: relative;
  background-color: #0CBABA;
  color: #fff;
  font-size: 1.2rem;
  border-radius: 1000px;
  width: 200px;
  height: 60px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.7), inset 0 1px rgba(255, 255, 255, 0.3);
  text-align: center;
  -webkit-transition: background-color 500ms, -webkit-transform 100ms;
  transition: background-color 500ms, -webkit-transform 100ms;
  transition: background-color 500ms, transform 100ms;
  transition: background-color 500ms, transform 100ms, -webkit-transform 100ms;
}
.Button__textWrapper {
  overflow: hidden;
}
.Button__text {
  line-height: 60px;
  top: 0;
}
.Button__icon {
  top: 100%;
  background: url("../images/icon-download.svg") no-repeat center center;
}
.Button::before {
  content: attr(data-tooltip);
  width: 140px;
  height: 60px;
  background-color: #EEB868;
  font-size: 1rem;
  border-radius: .25em;
  line-height: 60px;
  bottom: 90px;
  left: calc(50% - 70px);
}
.Button::after {
  content: '';
  width: 0;
  height: 0;
  border: 10px solid transparent;
  border-top-color: #EEB868;
  left: calc(50% - 10px);
  bottom: 70px;
}
.Button::before, .Button::after {
  position: absolute;
  opacity: 0;
  -webkit-transition: all 500ms;
  transition: all 500ms;
  visibility: hidden;
}
.Button:hover {
  background-color: #01BAEF;
}
.Button:hover .Button__text {
  top: -100%;
}
.Button:hover .Button__icon {
  top: 0;
}
.Button:hover::before, .Button:hover::after {
  opacity: 1;
  visibility: visible;
}
.Button:hover::after {
  bottom: 60px;
}
.Button:hover::before {
  bottom: 80px;
}
.Button:active {
  -webkit-transform: translate(2px, 2px);
          transform: translate(2px, 2px);
}