@media screen and (min-width: 768px) {
  .main .service {
    margin-top: 140px;
  }
  .main .service .container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
  }
  .main .service .item {
    width: 558px;
  }
  .main .service .cover {
    width: 558px;
    height: 418px;
  }
  .main .service .cover img {
    display: block;
    width: 100%;
    height: 100%;
  }
  .main .service .content .title {
    font-size: 24px;
    font-weight: bold;
    margin: 40px 0 16px;
  }
  .main .service .content .detail {
    text-align: justify;
    line-height: 32px;
  }
  .main .service .content .detail .mr40 {
    margin-right: 40px;
  }
  .main .service .content .detail span {
    color: #505050;
    margin-right: 25px;
  }
  .main .service .content .detail span::before {
    content: "";
    display: inline-block;
    vertical-align: -5px;
    width: 20px;
    height: 20px;
    background: url(/img/icon-right.png) no-repeat center;
    background-size: 20px;
    margin-right: 8px;
  }
  .main .about {
    height: 600px;
    background: url(/img/product-kestos-bg-about.png) no-repeat center;
    background-size: auto 600px;
    padding-top: 128px;
    text-align: center;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    margin-top: 140px;
  }
  .main .about .title {
    font-size: 24px;
    color: #fff;
  }
  .main .about .line {
    width: 32px;
    height: 2px;
    background-color: #fff;
    margin: 64px auto;
  }
  .main .about .description {
    width: 804px;
    font-size: 16px;
    line-height: 48px;
    margin: 0 auto;
    color: #fff;
  }

  .footer {
    margin-top: 0;
  }
}
@media screen and (max-width: 768px) {
  .main .service .container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
  }
  .main .service .item {
    width: 5.58rem;
  }
  .main .service .cover {
    width: 5.58rem;
    height: 4.18rem;
    margin-top: 1.2rem;
  }
  .main .service .cover img {
    display: block;
    width: 100%;
    height: 100%;
  }
  .main .service .content .title {
    font-size: 0.34rem;
    font-weight: bold;
    margin: 0.32rem 0 0.16rem;
  }
  .main .service .content .detail {
    text-align: justify;
    line-height: 0.48rem;
    font-size: 0.26rem;
  }
  .main .service .content .detail .mr40 {
    margin-right: 0.4rem;
  }
  .main .service .content .detail li {
    margin-top: 0.24rem;
  }
  .main .service .content .detail span {
    color: #505050;
    margin-right: 0.25rem;
    font-size: 0.24rem;
  }
  .main .service .content .detail span::before {
    content: "";
    display: inline-block;
    vertical-align: -0.06rem;
    width: 0.32rem;
    height: 0.32rem;
    background: url(/img/icon-right.png) no-repeat center;
    background-size: 0.32rem;
    margin-right: 0.08rem;
  }
  .main .about {
    background: url(/img/product-kestos-bg-about.png) no-repeat center;
    background-size: cover;
    text-align: center;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    margin-top: 1.2rem;
    padding: 0.24rem 0;
  }
  .main .about .title {
    font-size: 0.26rem;
    color: #fff;
  }
  .main .about .line {
    width: 0.32rem;
    height: 0.02rem;
    background-color: #fff;
    margin: 0.16rem auto;
  }
  .main .about .description {
    width: 6.12rem;
    font-size: 0.24rem;
    line-height: 0.48rem;
    margin: 0 auto;
    color: #fff;
    text-align: center;
  }

  .footer {
    margin-top: 0;
  }
}