@import url(https://fonts.googleapis.com/css?family=Sahitya);
li {
  /*margin: 10px;*/
  position: relative;
  width: 33.33%;
  height: 33.33vw;
  display: inline-block;
  vertical-align: top;
  -webkit-perspective: 16.8vw;
          perspective: 16.8vw;
    /*旋转控制*/
  -webkit-transform-origin: 50% 50% -16.8vw;
          transform-origin: 50% 50% -16.8vw;
}

.w {
  font-size: medium;
  font-size: initial;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  pointer-events: none;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
    /*旋转控制*/
  -webkit-transform-origin: 50% 50% -16.8vw;
          transform-origin: 50% 50% -16.8vw;
  will-change: transform;
  -webkit-animation: 200ms ease-out 0ms 1 normal forwards paused;
          animation: 200ms ease-out 0ms 1 normal forwards paused;
}

.f,
.b {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  color: white;
  -webkit-transition: none;
  transition: none;
}

.f {
  /*background-color: #00BCD4;*/
  /*background: -webkit-linear-gradient(#00BCD4, #673AB7);*/
  /*background: linear-gradient(#00BCD4, #673AB7);*/
  /*-webkit-transform: translate3d(0,0,0);*/
          /*transform: translate3d(0,0,0)*/
}

.f > svg{
  /*mix-blend-mode: luminosity;*/
}

.b {

  padding: 16px;
  padding: 1rem;
  /*旋转背景图*/
  /*background-image: url("../image/23333.jpg");*/
    background-color: gray;
  -webkit-transform: translate3d(0,0,-1px);
          transform: translate3d(0,0,-1px);

  display: -webkit-box;

  display: -ms-flexbox;

  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  /*文字阴影*/
  /*text-shadow: 0 20px 20px black;*/
  text-align: center;
}

.in-top .b,
.out-top .b {
  -webkit-transform-origin: 0% 100%;
          transform-origin: 0% 100%;
  -webkit-transform: translate3d(0, -100%, 0) rotate3d(1,0,0,90deg);
          transform: translate3d(0, -100%, 0) rotate3d(1,0,0,90deg);
}

.in-right .b,
.out-right .b {
  -webkit-transform-origin: 0% 0%;
          transform-origin: 0% 0%;
  -webkit-transform: translate3d(100%, 0, 0) rotate3d(0,1,0,90deg);
          transform: translate3d(100%, 0, 0) rotate3d(0,1,0,90deg);
}

.in-bottom .b,
.out-bottom .b {
  -webkit-transform-origin: 0% 0%;
          transform-origin: 0% 0%;
  -webkit-transform: translate3d(0, 100%, 0) rotate3d(-1,0,0,90deg);
          transform: translate3d(0, 100%, 0) rotate3d(-1,0,0,90deg);
}

.in-left .b,
.out-left .b {
  -webkit-transform-origin: 100% 0;
          transform-origin: 100% 0;
  -webkit-transform: translate3d(-100%,0,0) rotate3d(0,-1,0,90deg);
          transform: translate3d(-100%,0,0) rotate3d(0,-1,0,90deg);
}

.in {
}

.in-top .w{
  -webkit-animation-name: in-top;
          animation-name: in-top;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}

.in-right .w{
  -webkit-animation-name: in-right;
          animation-name: in-right;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}

.in-bottom .w{
  -webkit-animation-name: in-bottom;
          animation-name: in-bottom;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}

.in-left .w{
  -webkit-animation-name: in-left;
          animation-name: in-left;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}

.out {
}

.out-top .w{
  -webkit-animation-name: out-top;
          animation-name: out-top;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}

.out-right .w{
  -webkit-animation-name: out-right;
          animation-name: out-right;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}

.out-bottom .w{
  -webkit-animation-name: out-bottom;
          animation-name: out-bottom;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}

.out-left .w{
  -webkit-animation-name: out-left;
          animation-name: out-left;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}







.in-top .b{
    -webkit-animation-name: in-top;
    animation-name: in-top;
    -webkit-animation-play-state: running;
    animation-play-state: running;
}

.in-right .b{
    -webkit-animation-name: in-right;
    animation-name: in-right;
    -webkit-animation-play-state: running;
    animation-play-state: running;
}

.in-bottom .b{
    -webkit-animation-name: in-bottom;
    animation-name: in-bottom;
    -webkit-animation-play-state: running;
    animation-play-state: running;
}

.in-left .b{
    -webkit-animation-name: in-left;
    animation-name: in-left;
    -webkit-animation-play-state: running;
    animation-play-state: running;
}

.out {
}

.out-top .b{
    -webkit-animation-name: out-top;
    animation-name: out-top;
    -webkit-animation-play-state: running;
    animation-play-state: running;
}

.out-right .b{
    -webkit-animation-name: out-right;
    animation-name: out-right;
    -webkit-animation-play-state: running;
    animation-play-state: running;
}

.out-bottom .b{
    -webkit-animation-name: out-bottom;
    animation-name: out-bottom;
    -webkit-animation-play-state: running;
    animation-play-state: running;
}

.out-left .b{
    -webkit-animation-name: out-left;
    animation-name: out-left;
    -webkit-animation-play-state: running;
    animation-play-state: running;
}






@-webkit-keyframes in-top {
  from  {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
  to    {-webkit-transform: rotate3d(-1,0,0,90deg);transform: rotate3d(-1,0,0,90deg)}
}

@keyframes in-top {
  from  {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
  to    {-webkit-transform: rotate3d(-1,0,0,90deg);transform: rotate3d(-1,0,0,90deg)}
}
@-webkit-keyframes out-top {
  from {-webkit-transform: rotate3d(-1,0,0,90deg);transform: rotate3d(-1,0,0,90deg)}
  to   {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
}
@keyframes out-top {
  from {-webkit-transform: rotate3d(-1,0,0,90deg);transform: rotate3d(-1,0,0,90deg)}
  to   {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
}

@-webkit-keyframes in-right {
  from  {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
  to    {-webkit-transform: rotate3d(0,-1,0,90deg);transform: rotate3d(0,-1,0,90deg)}
}

@keyframes in-right {
  from  {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
  to    {-webkit-transform: rotate3d(0,-1,0,90deg);transform: rotate3d(0,-1,0,90deg)}
}
@-webkit-keyframes out-right {
  from  {-webkit-transform: rotate3d(0,-1,0,90deg);transform: rotate3d(0,-1,0,90deg)}
  to    {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
}
@keyframes out-right {
  from  {-webkit-transform: rotate3d(0,-1,0,90deg);transform: rotate3d(0,-1,0,90deg)}
  to    {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
}

@-webkit-keyframes in-bottom {
  from  {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
  to    {-webkit-transform: rotate3d(1,0,0,90deg);transform: rotate3d(1,0,0,90deg)}
}

@keyframes in-bottom {
  from  {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
  to    {-webkit-transform: rotate3d(1,0,0,90deg);transform: rotate3d(1,0,0,90deg)}
}
@-webkit-keyframes out-bottom {
  from  {-webkit-transform: rotate3d(1,0,0,90deg);transform: rotate3d(1,0,0,90deg)}
  to    {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
}
@keyframes out-bottom {
  from  {-webkit-transform: rotate3d(1,0,0,90deg);transform: rotate3d(1,0,0,90deg)}
  to    {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
}

@-webkit-keyframes in-left {
  from  {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
  to    {-webkit-transform: rotate3d(0,1,0,90deg);transform: rotate3d(0,1,0,90deg)}
}

@keyframes in-left {
  from  {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
  to    {-webkit-transform: rotate3d(0,1,0,90deg);transform: rotate3d(0,1,0,90deg)}
}
@-webkit-keyframes out-left {
  from  {-webkit-transform: rotate3d(0,1,0,90deg);transform: rotate3d(0,1,0,90deg)}
  to    {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
}
@keyframes out-left {
  from  {-webkit-transform: rotate3d(0,1,0,90deg);transform: rotate3d(0,1,0,90deg)}
  to    {-webkit-transform: rotate3d(0,0,0,0deg);transform: rotate3d(0,0,0,0deg)}
}

/* ======= aesthetics ======= */

* {
  margin: 0;
  box-sizing: border-box;
}

/*.xz {*/
  /*padding: 48px 24px;*/
  /*padding: 3rem 1.5rem;*/
  /*font-size: 16px;*/
  /*font-family: 'Sahitya', serif;*/
  /*color: #000;*/
  /*background-color: #fff;*/
  /*line-height: 1.618;*/
  /*-webkit-font-smoothing: antialiased;*/
  /*-moz-osx-font-smoothing: grayscale;*/
/*}*/

header {
  padding-bottom: 48px;
  padding-bottom: 3rem;
}

h1 {
  font-size: 2em
}

h1 sup{
  font-size: .7em;
  color: #00BCD4;
}

ul {
  font-size: 0;
  padding: 0;
  margin: 0 auto;
  width: 100%;
  list-style: none;
  margin-top: 1vw;
}

ul::after{
  content: '';
  display: table;
  clear: both;
}

footer {
  font-size: 12px;
  font-size: .75rem;
  font-family: monospace;
  padding-top: 48px;
  padding-top: 3rem
}

footer a{
  display: inline-block;
  vertical-align: middle;
}

footer svg{
  fill: currentColor;
}

:link,:visited {
  color: #00BCD4;
}

.-center {
  text-align: center;
  width: 100%;
  margin-top: 2vw;
}

.-neutral-mid {
  color: rgb(153, 153, 153);
}