.contanier{
  width: 100%;
  height: calc(100vh);
  background: url('../images/bg.gif') no-repeat top left;
  background-size: cover;
  overflow: hidden;
}
.return {
  position: fixed;
  bottom: 50%;
  right: 20px;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 100%;
  text-align: center;
  font-size: .375rem;
  line-height: 1.25rem;
  background-color: yellow;
  font-weight: bold;
  color: #000;
  z-index: 9999;
  cursor: pointer;
}

/* nav部分 */
.flex-container {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  justify-items: center;
  margin: 30px;
  z-index: 99;
}

.flex-container .flex-middle{
  width: 500px;
  height: 400px;
  line-height: 400px;
  text-align: center;
  color: #fff;
  font-size: .25rem;
  font-weight: bold;
  border: 1px solid #fff;
}

.flex-container ul {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  width: calc((100% - 600px) / 2);
  height: 400px;
}


/* .flex-container ul.flex-left {
  position: relative;
  border: 1px solid red;
} */

.flex-container ul.flex-left li:nth-child(1) {
  position: absolute;
  left: 0;
  top: 0;
}

.flex-container ul.flex-left li:nth-child(2) {
  position: absolute;
  left: 0;
  top: 140px;
  animation-delay: .3s;
}

.flex-container ul.flex-left li:nth-child(3) {
  position: absolute;
  left: 0;
  top: 280px;
  animation-delay: .6s;
}


.flex-container ul.flex-right li:nth-child(1) {
  position: absolute;
  right: 0;
  top: 0;
}

.flex-container ul.flex-right li:nth-child(2) {
  position: absolute;
  right: 0;
  top: 140px;
  animation-delay: .3s;
}

.flex-container ul.flex-right li:nth-child(3) {
  position: absolute;
  right: 0;
  top: 280px;
  animation-delay: .6s;
}

.flex-container ul li{
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 1.25rem;
  line-height: 1.25rem;
  text-align: center;
  color: #fff;
  font-size: .25rem;
  font-weight: bold;
  background-color: rgb(0, 174, 255);
  border: 1px solid #000;
  cursor: pointer;
}

.flex-container ul li img{
  display: block;
  margin-left: .375rem;
  height: .625rem;
}

.flex-item-link img.active{
  position: fixed;
  top: 50%;
  left: -50%;
  width: 400px;
  height: 400px;
  margin: -200px 0 0 -200px;
}

.flex-container ul li a{
  display: block;
}

/* pdf预览 */
.pdfobject-container {
  position: fixed;
  top: 0;
  left: 0;
  width: calc(100vw);
  height: calc(100vh);
  z-index: 999;
}

.chat-wrapper {
  position: relative;
  width: 10rem;
  height: 10rem;
  margin: .375rem auto;
  background-color: #fff;
  border-radius: .125rem;
  z-index: 99;
}

.chat-content {
  width: 100%;
  height: calc(100% - 2.5rem);
  overflow: hidden;
  overflow-y: scroll;
}

.chat-message {
  display: flex;
  justify-content: flex-end;
  margin: .125rem;
  padding: .125rem;
  line-height: .5rem;
  font-size: .25rem;
  color: #000;
}

.chat-message p {
  position: relative;
  line-height: .5rem;
  padding: 0 .125rem;
  margin-right: .125rem;
  background-color: burlywood;
  border-radius: .05rem;
}

.chat-message p span{
  position: absolute;
  left: 0;
  bottom: -0.45rem;
  width: 1rem;
  height: .375rem;
  text-align: center;
  line-height: .375rem;
  border: 1px solid #000;
  border-radius: .05rem;
  font-size: .175rem;
  cursor: pointer;
}

.chat-message p span:hover{
  background-color: #999;
}

.chat-message p span.remove-btn{
  border: none;
  color: #999;
}

.chat-message p span.remove-btn:hover{
  background-color: #fff;
}

.chat-message img {
  display: block;
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
}

.bot-message {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-end;
}

.bot-message p {
  margin-left: .125rem;
  background-color: rgb(0, 209, 112);
}
.loading{
  position: relative;
}
.loading img {
  display: block;
  width: .25rem;
  height: .25rem;
  margin-top: .125rem;
  animation: rotate 2s linear infinite;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.chat-send {
  width: 100%;
  height: 2.5rem;
  background-color: #fff;
  border-radius: .125rem;
}

.chat-send textarea {
  display: block;
  width: calc(100% - .5rem);
  height: 1.25rem;
  font-size: .3rem;
  line-height: .375rem;
  border: none;
  padding: .25rem;
  background-color: #e4e4e4;
}

.send-button-container {
  text-align: right;
}

.send-button {
  margin: .125rem .25rem 0 0;
  padding: 0 .25rem;
  line-height: .5rem;
  font-size: .325rem;
  color: #000;
}

.send-disabled-button {
  color: #7c7c7c;
}

.scene-wrapper{
  position: relative;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  width: calc(100vw - .525rem);
  height: calc(100vh - .525rem);
  padding: .25rem;
  z-index: 99;
}

.scene-item{
  display: flex;
  flex-direction: column;
  align-self: center;
  width: calc(100% / 3 - .525rem);
  margin: .25rem;
}

.scene-item img{
  display: block;
  width: 2.5rem;
  height: 2.5rem;
  margin: 0 auto;
}

.scene-item p{
  margin-top: .25rem;
  font-size: .3rem;
  color: #fff;
  text-align: center;
}

/* 菜单3D */
.show-nav{
  position: relative;
  width: 1000px;
  height: 460px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0 auto;
  z-index: 99;
}

#showcase {
  width: 100%;
  height: 360px;
  /* border-radius: 8px; */
  position: absolute;
  transform-style: preserve-3d;
  transition: transform 1s;
}

.menu-item{
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 100%;
  background-color: #fff;
  text-align: center;
  line-height: 240px;
  font-size: 26px;
  font-weight: bold;
  color: #000;
  cursor: pointer;
}
/* 
.a {
  transform: rotateY(0deg);
  background: #ed1c24;
}
.b {
  transform: rotateY(60deg);
  background: #0072bc;
}
.c {
  transform: rotateY(120deg);
  background: #39b54a;
}
.d {
  transform: rotateY(180deg);
  background: #f26522;
}
.e {
  transform: rotateY(240deg);
  background: #630460;
} 
.f {
  transform: rotateY(300deg);
  background: #8c6239;
}
 */

#nav {
  margin-top: 10px;
  text-align: center;
}
#nav > button {
  width: 64px;
  height: 36px;
  color: #666;
  font: bold 16px arial;
  text-align: center;
  margin: 5px;
  text-shadow: 0px 1px 0px #f5f5f5;
  background: #f6f6f6;
  border: solid 2px rgba(0, 0, 0, 0.4);
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  border-radius: 5px;
  -webkit-box-shadow: 0 0 9px 1px rgba(0, 0, 0, 0.4);
  -moz-box-shadow: 0 0 9px 1px rgba(0, 0, 0, 0.4);
  box-shadow: 0 0 9px 1px rgba(0, 0, 0, 0.4);
  cursor: pointer;
}
#nav > button:active,
#nav > button.down {
  background: #dfdfdf;
  border: solid 2px rgba(0, 0, 0, 0.6);
  box-shadow: none;
}



.container {
  width: 250px;
  height: 200px;
  position: relative;
  perspective: 1000px;
}

.carousel {
  height: 100%;
  width: 100%;
  position: absolute;
  transform-style: preserve-3d;
  transition: transform 1s;
}

.item {
  display: block;
  position: absolute;
  background: #000;
  width: 250px;
  height: 200px;
  line-height: 200px;
  font-size: .375rem;
  text-align: center;
  color: #FFF;
  opacity: 0.95;
  border-radius: 10px;
  cursor: pointer;
}
.item  a{
  /* display: block; */
}

.a {
  transform:   rotateY(0deg) translateZ(250px);
  background: #ed1c24;
}
.b {
  transform: rotateY(60deg) translateZ(250px);
  background: #0072bc;
}
.c {
  transform: rotateY(120deg) translateZ(250px);
  background: #39b54a;
}
.d {
  transform: rotateY(180deg) translateZ(250px);
  background: #f26522;
}
.e {
  transform: rotateY(240deg) translateZ(250px);
  background: #630460;
} 
.f {
  transform: rotateY(300deg) translateZ(250px);
  background: #8c6239;
}

.next, .prev {
  color: #444;
  position: absolute;
  top: 50%;
  padding: 15px 30px;
  cursor: pointer;
  background: #CCC;
  border-radius: 5px;
  border-top: 1px solid #FFF;
  box-shadow: 0 5px 0 #999;
  transition: box-shadow 0.1s, top 0.1s;
  z-index: 999;
}
.next:hover, .prev:hover { color: #000; }
.next:active, .prev:active {
  top: 51%;
  box-shadow: 0 1px 0 #999;
}
.next { right: .75rem; }
.prev { left: .75rem; }