.logo-ty {
  background-image: url("../images/logo/ty.png");
  background-size: cover;
  background-repeat: no-repeat;
  max-width: 150px;
  height: 150px;
}
.logo-xg {
  background-image: url("../images/logo/xige.png");
  background-size: cover;
  background-repeat: no-repeat;
  max-width: 225px;
  height: 79px;
}
.logo-cy {
  background-image: url("../images/logo/chuyun.png");
  background-size: cover;
  background-repeat: no-repeat;
  max-width: 390px;
  height: 60px;
}
.logo-lx {
  background-image: url("../images/logo/lxjx.png");
  background-size: cover;
  background-repeat: no-repeat;
  max-width: 258px;
  height: 90px;
}