/***主顏色***/
:root {
  --bgColor: #FFFFFB;
  --mainColor: #82663A;
}

/***********/
.home {
  background: url(img/banner1.jpg) center no-repeat;
  background-size: cover;
  animation-name: banner;
  animation-duration: 20s;
  animation-iteration-count: infinite;
}

.about {
  background: url(img/aboutBg.jpg) center no-repeat fixed;
  background-size: cover;
}
.btn_a {
  padding: 5px;
width: 100px;
  border: 2px solid #82663A;;
  text-align: center;
  display: inline-block;
}
@keyframes banner {
  0% {
    background: url(img/banner1.jpg) center no-repeat;
    background-size: cover;
  }

  28% {
    background: url(img/banner1.jpg) center no-repeat;
    background-size: cover;
  }

  33% {
    background: url(img/banner2.jpg) center no-repeat;
    background-size: cover;
  }

  61% {
    background: url(img/banner2.jpg) center no-repeat;
    background-size: cover;
  }

  66% {
    background: url(img/banner3.jpg) center no-repeat;
    background-size: cover;
  }

  95% {
    background: url(img/banner3.jpg) center no-repeat;
    background-size: cover;
  }

  100% {
    background: url(img/banner1.jpg) center no-repeat;
    background-size: cover;
  }
}

@media(max-width:770px) {
  .news .item>img {
    width: 100%;
    height: 100%;
  }
}