.wrap {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  margin: 0 auto;
  overflow-x: hidden;
  overflow-y: scroll;
}

.wrap-inner {
  position: absolute;
  overflow: hidden;
  left: 0;
  width: 640px;
  height: auto;
  top: 0;
}

/*消除ios点击阴影*/
html,
body {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  /* ios 滑动 */
  -webkit-overflow-scrolling: touch;
  -webkit-user-select: none;
}

/*消除ios动画抖动*/
* {
  -webkit-backface-visibility: hidden;
}

/* 去除滚动条 */
::-webkit-scrollbar {
  width: 0;
  height: 1px
}

/* 清除浮动 */
.clearfix:after {
  content: ".";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}

.clearfix {
  *zoom: 1;
}

.page {
  display: none;
}

.hd {
  background: rgba(0, 0, 0, 0.8);
}

video {
  width: 100%;
  height: 100%;

}

.video1,
.video2,
.video3 {
  border-radius: 20px;
  overflow: hidden;
}

.arrow {
  animation: arrow 2s linear infinite;
  -webkit-animation: arrow 2s linear infinite;
}

@keyframes arrow {
  0% {
    transform: translateY(-50%);
    opacity: 0;
  }

  50% {
    opacity: 1;
  }

  90% {
    opacity: 1;
    transform: translateY(50%);
  }

  100% {
    opacity: 0;
    transform: translateY(50%);
  }
}

@-webkit-keyframes arrow {
  0% {
    -webkit-transform: translateY(-50%);
    opacity: 0;
  }

  50% {
    opacity: 1;
  }

  90% {
    opacity: 1;
    -webkit-transform: translateY(50%);
  }

  100% {
    opacity: 0;
    -webkit-transform: translateY(50%);
  }
}