/* ------------------------------------------
 * IT书包
 * 网址：www.itshubao.com
 * 整理：yinq<3331653644@qq.com> 
 -------------------------------------------- */
.button-face {
  background-color: #55acee;
  border: none;
  border-radius: 5%;
  width: 140px;
  height: 40px;
  z-index: 1;
  box-shadow: rgba(0, 0, 0, 0.2) 0px 2px 3px, inset rgba(0, 0, 0, 0.2) 0px -1px 2px;
  text-align: center;
  animation: close 1s forwards, stay 1s forwards;
}

span {
  display: block;
}

.fa-twitter {
  color: white;
  font-size: 30px;
  margin-top: 5px;
  text-shadow: 1px 1px 1px #adadad;
}

.screw {
  width: 7px;
  height: 7px;
  background-color: gray;
  border-radius: 50%;
  border: 1px solid #3f3f3f;
  margin-left: 125px;
  top: 25px;
  position: absolute;
  box-shadow: rgba(0, 0, 0, 0.2) 0px 2px 3px, inset rgba(0, 0, 0, 0.2) 0px -1px 2px;
  z-index: 5;
}

.line {
  height: 7px;
  width: 1px;
  background-color: #3f3f3f;
  margin-left: 3px;
}

a {
  color: black;
  height: 40px;
  width: 140px;
  text-decoration: none;
  position: absolute;
  left: 50%;
  margin-left: -70px;
  top: 100px;
}

.handle {
  z-index: -1;
  margin-top: -61px;
  border-radius: 5%;
  width: 140px;
  height: 40px;
  font-size: 16px;
  position: relative;
  background-color: #f2f2f2;
  color: #3f3f3f;
  box-shadow: rgba(0, 0, 0, 0.2) 0 2px 3px, inset rgba(0, 0, 0, 0.2) 0 -1px 2px;
  font-family: 'Archivo Narrow', sans-serif;
}

h4 {
  margin-left: 4px;
  font-family: 'Archivo Narrow', sans-serif;
  line-height: 40px;
}

a:hover .button-face {
  animation: open 1s forwards, stay 1s forwards;
}

@keyframes open {
  0% {
    transform-origin: 128px 30px;
  }
  25% {
    transform-origin: 128px 30px;
    transform: rotate(-120deg);
  }
  50% {
    transform-origin: 128px 30px;
    transform: rotate(-70deg);
  }
  100% {
    transform-origin: 128px 30px;
    transform: rotate(-90deg);
  }
}
@keyframes close {
  0% {
    transform-origin: 128px 30px;
    transform: rotate(-90deg);
  }
  100% {
    transform-origin: 128px 30px;
    transform: rotate(0deg);
  }
}
@keyframes stay {
  0% {
    transform-origin: 128px 30px;
    transform: rotate(0deg);
  }
  100% {
    transform-origin: 128px 30px;
    transform: rotate(0deg);
  }
}