.flex-box {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
  }
  .banner {
    width: 100%;
    height: 158px;
    background: url(/img/support/policy-banner.png);
    padding: 54px 20px 49px;
    box-sizing: border-box;
    text-align: center;
  }
  .banner .content {
    max-width: 646px;
    text-align: left;
    margin: auto;
    margin-left: 346px;
  }
  h1 {
    color: #1e2432;
    font-size: 36px;
    line-height: 40px;
    font-weight: 700;
    position: relative;
  }
  
  .product {
    text-align: center;
    margin-top: 60px;
    margin-bottom: 80px;
  }
  h2 {
    font-size: 32px;
    color: #282828;
  }
  .product .item_box {
    max-width: 340px;
    width: 100%;
    box-sizing: border-box;
    border-top: 5px solid #1abc9c;
    margin: 70px 10px 0px;
    background: url(/img/about/product-bg.jpg) no-repeat #f7f7f7;
    background-position: bottom right;
    background-size: cover;
  }
  .product .item {
    width: 100%;
    box-sizing: border-box;
    padding: 40px;
    background: #fff;
    opacity: 0.92;
  }
  .product .item > img {
    display: block;
    margin: auto;
    height: 81px;
    width: auto;
  }
  .product .item .title {
    display: inline-block;
    text-align: center;
    margin: 20px auto 0px;
    font-size: 24px;
    color: #1e2432;
    line-height: 34px;
    font-weight: 600;
  }
  .product .item .title:hover {
    color: #2ad9c2;
  }
  .product .item ul {
    margin-top: 36px;
    font-size: 18px;
    color: #7a7a7a;
    line-height: 24px;
  }
  .product .item ul li {
    margin: 22px auto;
  }
  .product .item ul li a {
    position: relative;
  }
  .product .item ul li a::before {
    content: '';
    clear: both;
    position: relative;
    background: url(/img/support/tip-14.svg) center no-repeat;
    background-size: 16px 14px;
    width: 16px;
    height: 14px;
    display: inline-block;
    vertical-align: 0px;
    margin-right: 6px;
  }
  a.product_btn {
    display: block;
    min-width: 220px;
    padding-left: 15px;
    padding-right: 15px;
    height: 50px;
    line-height: 50px;
    font-size: 16px;
    font-weight: 600;
    background: #1abc9c;
    border-radius: 6px;
    box-sizing: border-box;
    color: #fff;
    margin: 20px auto 0px;
    position: relative;
    transition: all 0.5s;
    margin-top: 44px;
    display: inline-block;
  }
  a.product_btn:hover {
    background: #12ab8d;
    transform: translateY(-10px);
  }
  .support {
    text-align: center;
    margin: 80px auto 40px;
  }
  .support p {
    max-width: 906px;
    margin: 30px auto 30px;
    color: rgb(122, 122, 122);
    font-size: 18px;
    line-height: 28px;
  }
  .support .item {
    max-width: 520px;
    padding: 0px 12px 54px;
    box-sizing: border-box;
    background: #f5faf9;
    border-radius: 10px;
    margin: 100px 24px 0px;
  }
  .support .item img {
    margin-top: -40px;
  }
  .support .item .title {
    color: #324e5a;
    font-size: 24px;
    font-weight: 600;
    margin: 6px auto 10px;
  }
  .support .item .des {
    color: #606473;
    font-size: 14px;
    font-weight: 600;
    margin: 20px auto 0px;
    line-height: 20px;
  }
  .support .product_btn {
    margin-top: 60px;
    height: 62px;
    line-height: 62px;
  }
  .support .product_btn::before {
    content: '';
    clear: both;
    position: relative;
    background: url(/img/support/message.svg) center no-repeat;
    background-size: 24px 24px;
    width: 24px;
    height: 24px;
    display: inline-block;
    vertical-align: 0px;
    margin-right: 6px;
    vertical-align: -5px;
  }
  @media (max-width: 1148px) {
    .product .item_box {
      width: 50%;
    }
    .product .flex-box {
        max-width: 780px;
        margin-left: auto;
        margin-right: auto;
    }
    .comment .software img {
      margin: auto;
    }
    .support .item{
      margin: 25px auto;
    }
  }
  @media (max-width: 768px) {
    .product .flex-box {
      flex-wrap: wrap;
      flex-direction: column;
      align-items: center;
    }
    .product .item_box {
      width: 100%;
      max-width: 520px;
      margin: 70px auto 0px;
    }
  }
  @media (max-width: 490px) {
    h1{
      font-size:30px;
    }
  }
  @media (max-width: 408px) {
    h1{
      font-size:27px;
    }
  }
  @media (max-width: 360px) {
    .product .item {
      padding: 40px 20px;
    }
    .support .item {
      margin: 76px auto 0px;
    }
    h1{
      font-size:25px;
    }
  }