.information-box {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  display: -webkit-flex;
}

.information-box {
  width: 1190px;
  margin: 100px auto 120px;
}

.information-box aside {
  width: 190px;
  margin-right: 100px;
}

.information-content {
  width: 900px;
}
.box1 {
  height: 2144px;
}
.item {
  position: relative;
  display: inline-block;
  width: 445px;
  height: 278px;
}

.item:nth-child(2n-1) {
  margin-right: 5px;
}

.item:nth-child(-n+12) {
  margin-bottom: 27px;
}

.item img {
  width: 445px;
  height: 278px;
}

.mask {
  z-index: 0;
  width: 445px;
  height: 278px;
  background-color: rgba(51, 51, 51, 0.5);
  position: absolute;
  padding: 104px 0;
  text-align: center;
  font-family: SourceHanSansCN-Medium;
  font-size: 24px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: #FFFFFF;
}






.fadeInup {
  animation: moveUp 1.5s;
  -webkit-animation: moveUp 1.5s;
}

@keyframes moveUp {
  0% {
    opacity: 0;
    -webkit-transform: translateY(10%);
            transform: translateY(10%);
  }

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

@-webkit-keyframes moveUp {
  0% {
    opacity: 0;
    -webkit-transform: translateY(10%);
            transform: translateY(10%);
  }

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


/* 返回顶部样式 */

.fadeInright {
  animation: moveRight 1.5s;
  -webkit-animation: moveRight 1.5s;
}

@keyframes moveRight {
  0% {
    -webkit-transform: translateX(200%);
            transform: translateX(200%);
  }

  100% {
    -webkit-transform: translateX(0);
            transform: translateX(0);
  }
}

@-webkit-keyframes moveRight {
  0% {
    -webkit-transform: translateX(200%);
            transform: translateX(200%);
  }

  100% {
    -webkit-transform: translateX(0);
            transform: translateX(0);
  }
}

.fadeOutright {
  animation: moveOutright 1.5s;
  -webkit-animation: moveOutright 1.5s;
}

@-webkit-keyframes moveOutright {
  0% {
    -webkit-transform: translateX(0);
            transform: translateX(0);
  }

  100% {
    -webkit-transform: translateX(200%);
            transform: translateX(200%);
  }
}

@keyframes moveOutright {
  0% {
    -webkit-transform: translateX(0);
            transform: translateX(0);
  }

  100% {
    -webkit-transform: translateX(200%);
            transform: translateX(200%);
  }
}

.returnTop {
  display: none;
  position: fixed;
  right: 8%;
  bottom: 35%;
  background: url(../images/backtop.png) no-repeat left top;
  width: 60px;
  height: 60px;
}

.returnTop:hover {
  cursor: pointer;
  background: url(../images/backtop-hover.png) no-repeat left top;
}