.bossgoo-index-application53 {
    padding-bottom: 80px;
  }
  
  .bossgoo-index-application53 .first-title {
    padding-bottom: 22px;
    background: url(../../../images/53/tit_bg.png?image_process=format,webpt) no-repeat center bottom;
    color: #333;
  }
  
  .bossgoo-index-application53 ul {
    display: flex;
    flex-wrap: wrap;
  }
  
  .bossgoo-index-application53 li {
    width: 32%;
    margin-right: 2%;
    margin-bottom: 30px;
  }
  
  .bossgoo-index-application53 li:nth-child(3n) {
    margin-right: 0;
  }
  
  .bossgoo-index-application53 .img-item {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 65.2%;
    overflow: hidden;
  }
  
  .bossgoo-index-application53 .img-item .img-box {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
  }
  
  .bossgoo-index-application53 .img-item img {
    width: 100%;
    height: 100%;
    /* object-fit: cover; */
    object-fit: contain;
  }
  
  .bossgoo-index-application53 .mask {
    flex-direction: column;
    justify-content: center;
    position: absolute;
    left: 0;
    bottom: -80%;
    width: 100%;
    height: 100%;
    padding: 20px 30px;
    background: rgba(0, 0, 0, 0.65);
    color: #fff;
    transition: all .5s ease-in-out;
  }
  
  .bossgoo-index-application53 .title {
    display: block;
    margin-bottom: 15px;
  }
  
  .bossgoo-index-application53 .des {
    transform: translate(80px, 0);
    opacity: 0;
    color: #ccc;
  }
  
  .bossgoo-index-application53 li:hover .mask {
    display: flex;
    bottom: 0;
  }
  
  .bossgoo-index-application53 li:hover .des {
    transform: translate(0, 0);
    opacity: 1;
    transition: all .3s ease-in-out;
    transition-delay: .5s;
  }
  
  .bossgoo-index-application53 .btn-more {
    display: block;
    width: 340px;
    height: 60px;
    line-height: 60px;
    margin: 20px auto 0;
    text-align: center;
    background: var(--themeColor);
    font-size: 20px;
    color: #fff;
  }
  
  @media only screen and (max-width: 1300px) {
    .bossgoo-index-application53 .mask {
      bottom: -76%;
    }
  }
  
  @media only screen and (max-width: 1100px) {
    .bossgoo-index-application53 .mask {
      bottom: -74%;
    }
  }
  
  @media only screen and (max-width: 1040px) {
    .bossgoo-index-application53 {
      padding-bottom: .6rem;
    }
    .bossgoo-index-application53 .wrap {
      padding: 0 .2rem;
    }
    .bossgoo-index-application53 .first-title {
      padding-bottom: .3rem;
      background-size: auto .06rem;
    }
    .bossgoo-index-application53 ul {
      display: block;
    }
    .bossgoo-index-application53 li {
      width: 100%;
      margin-bottom: .3rem;
    }
    .bossgoo-index-application53 .mask {
      height: auto;
      bottom: 0;
    }
    .bossgoo-index-application53 .title {
      margin-bottom: 0;
    }
    .bossgoo-index-application53 .des {
      display: none;
    }
    .bossgoo-index-application53 .btn-more {
      width: 100%;
      height: .8rem;
      line-height: .8rem;
      font-size: .3rem;
    }
  }