.cover img {
  width: 100%;
}
.block {
  margin-top: 120px;
}
.desc {
  font-size: 30px;
  text-align: center;
}
@media screen and (min-width: 1321px) {
  a.img {
    display: block;
    position: relative;
    color: #333;
    width: 100%;
  }
  a.img img {
    width: 100%;
  }
  .block:last-child {
    margin-bottom: 120px;
  }
  .txt {
    position: absolute;
    padding: 70px 110px;
    background: -webkit-gradient(linear, left top, right top, color-stop(90%, #F5F5F5), to(transparent));
    background: -webkit-linear-gradient(left, #F5F5F5 90%, transparent);
    background: linear-gradient(to right, #F5F5F5 90%, transparent);
    top: 0;
    left: 0;
    bottom: 0;
  }
  .txt .title {
    font-size: 60px;
    text-align: center;
    margin-bottom: 40px;
  }
  .txt .desc {
    font-size: 34px;
    margin-bottom: 30px;
    line-height: 40px;
  }
  .txt p {
    font-size: 18px;
    line-height: 30px;
    margin-bottom: 10px;
  }
  .txt i {
    font-size: 55px;
  }
}
@media screen and (max-width: 1320px) {
  .title {
    font-size: 30px;
  }
  .desc {
    font-size: 18px;
  }
  .txt {
    background: #F5F5F5;
    padding: 40px;
    margin: 20px;
  }
  .txt div {
    font-size: 27px;
    line-height: 35px;
    margin-bottom: 25px;
  }
  .txt p {
    line-height: 30px;
    margin-bottom: 10px;
  }
  .txt i {
    font-size: 40px;
  }
}

@media screen and (min-width: 1321px) {
  .iimg {
    margin: 120px auto;
  }
  .iimg img {
    width: 100%;
  }
  .iimg-box {
    position: relative;
  }
  .iimg-box-list {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
  }
  .iimg-box-list img {
    width: 50%;
  }
  .iimg-box img {
    margin-bottom: 20px;
  }
  .ttxt {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    color: white;
    text-align: center;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
  }
  .ttxt i {
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 30px;
  }
  .ttxt p {
    font-size: 24px;
    line-height: 40px;
  }
}
@media screen and (max-width: 1320px) {
  .iimg-box {
    position: relative;
    margin: 20px;
    margin-bottom: 60px;
  }
  .iimg-box img {
    position: absolute;
    top: 0;
    left: 0;
    -o-object-fit: cover;
       object-fit: cover;
    width: 100%;
    height: 100%;
  }
  .iimg-box-list {
    margin: 20px;
    margin-bottom: 70px;
  }
  .iimg-box-list img {
    width: 100%;
  }
  .iimg-box-list img:first-child {
    border-bottom: 2px solid black;
    margin-bottom: 60px;
  }
  .ttxt {
    position: relative;
    z-index: 1;
    color: white;
    text-align: center;
    padding: 120px 20px;
  }
  .ttxt i {
    font-size: 42px;
    font-weight: bold;
  }
  .ttxt p {
    font-size: 24px;
    line-height: 40px;
    margin-top: 30px;
  }
}
<!--ºÄʱ1774179515.9514Ãë-->