.main-container {
  width: 100vw;
  position: relative;
  min-height: 100vh;
}
.container {
  width: 70vw;
  margin: 0 auto;
}
.top {
  padding-top: 20px;
}
.top .img-logo {
  width: 10vw;
  height: auto;
}

.middle .img-logo {
  width: 100vw;
  height: 30vw;
}

.bottom {
  position: absolute;
  padding-bottom: 4px;
  bottom: 0;
  left: 15vw;
  height: 48px;
  line-height: 46px;
  text-align: center;
  font-size: 13px;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 70vw;
}
.bottom span {
  margin-right: 5vw;
}
.bottom .link-gongxin {
  display:inline-block;
  line-height: 20px;
  display: flex;
  align-items: center;
}
.bottom .link-gongxin:hover {
  text-decoration: none;
}
.bottom .link-gongxin img {
  width: 20px;
  height:20px;
  margin-right: 10px;
}