body {
  font-family: "Microsoft JhengHei", "微軟正黑體", "微软雅黑", "Helvetica Neue", Helvetica, Arial, sans-serif;
  letter-spacing: 2px;
  background-color: hsl(0, 0%, 90%);
}

a, a:hover, a:focus, a:active {
  text-decoration: none;
}

.wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background-image: url(../img/bg.jpg);
    background-position: center;
    background-size: cover;
}

.wrap .center {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  text-align: center;
  left: 0;
  right: 0;
  padding: 50px 30px 30px 30px;
  background-color: rgba(0, 0, 0,.8);
}

.wrap .img{
  height: 100px;
  -webkit-animation: spin 6s ease-in-out infinite alternate;
  -moz-animation: spin 6s ease-in-out infinite alternate;
  -o-animation: spin 6s ease-in-out infinite alternate;
  animation: spin 6s ease-in-out infinite alternate;
}

.wrap h1 {
  color: #fff;
  margin-top: 30px;
  font-size: 80px;
  font-weight: bold;
}

.wrap .logo {
  height: 50px;
}

.wrap h3 {
  color: #fff;
  font-size: 30px;
}

.wrap p {
  color: #fff;
  font-size: 20px;
}

@-webkit-keyframes spin {
  0% {
    -webkit-transform: rotate(-15deg);
  }
  10% {
    -webkit-transform: rotate(-85deg);
  }
  30% {
    -webkit-transform: rotate(5deg);
  }
  50% {
    -webkit-transform: rotate(250deg);
  }
  100% {
    -webkit-transform: rotate(0deg);
  }
}
@-moz-keyframes spin {
  0% {
    -moz-transform: rotate(-15deg);
  }
  10% {
    -moz-transform: rotate(-85deg);
  }
  30% {
    -moz-transform: rotate(5deg);
  }
  50% {
    -moz-transform: rotate(250deg);
  }
  100% {
    -moz-transform: rotate(0deg);
  }
}
@-o-keyframes spin {
  0% {
    -o-transform: rotate(-15deg);
  }
  10% {
    -o-transform: rotate(-85deg);
  }
  30% {
    -o-transform: rotate(5deg);
  }
  50% {
    -o-transform: rotate(250deg);
  }
  100% {
    -o-transform: rotate(0deg);
  }
}
@keyframes spin {
  0% {
    transform: rotate(-15deg);
  }
  10% {
    transform: rotate(-85deg);
  }
  30% {
    transform: rotate(5deg);
  }
  50% {
    transform: rotate(250deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

@media (max-width: 768px) {
  .wrap h1 {
    font-size: 50px;
  }
  .wrap h3 {
    font-size: 26px;
  }
  .wrap p {
    font-size: 16px;
  }
  .wrap .center {
    top: 0;
    bottom: 0;
    transform: rotateY(0);
  }
}