.header-right-title span {
  font-size: 26px;
}

/* 中间主题 */
.main {
  width: 100%;
  padding: 70px 0 40px 0;
  /* background: #f8f8f8; */
}
.main-back a {
  font-size: 20px;
}
.main-center {
  width: 1200px;
  height: calc(1200px * 0.66);
  padding: 50px 0;
  margin: 0 auto;
  position: relative;
}

.main-center a {
  display: block;
  width: 100%;
  height: 100%;
  font-size: 30px;
}
.main-center span{
  display: block;
  text-align: center;
  padding-bottom: 16px;
}
.main-center img {
  width: 100%;
  height: 100%;
}


@media screen and (max-width: 1610px) {
  .main-center {
    width: 1000px;
    height: calc(1000px * 0.66);
  }
}

@media screen and (max-width: 1330px) {
  .main-center {
    width: 800px;
    height: calc(800px * 0.66);
  }
}

@media screen and (max-width: 1030px) {
  .main-center {
    width: 600px;
    height: calc(600px * 0.66);
  }
}
@media screen and (max-width: 830px) {
  .main-center {
    width: 500px;
    height: calc(500px * 0.66);
  }
}