.main {
    padding-top: 100px;
    padding-bottom: 100px
  }
.project-list ul {
    margin: -20px -26px 0;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap
  }
  
  .project-list ul li {
    width: 25%;
    padding: 20px 26px
  }
  
  .project-list ul li>a {
    position: relative;
    overflow: hidden;
    display: block
  }
  
  .project-list ul li img {
    display: block;
    width: 100%
  }
  
  .project-list ul li .txt {
    position: absolute;
    left: 15px;
    right: 15px;
    bottom: 20px;
    z-index: 105;
    background: rgba(255,255,255,.9);
    padding: 20px;
    transition: opacity .2s,transform .35s
  }
  
  .project-list ul li .txt h6 {
    font-size: 13px;
    color: #212121;
    line-height: 25px;
    height: 50px;
    overflow: hidden;
    font-weight: 500
  }
  
  .project-list ul li:hover .txt {
    background: #4fa8b4
  }
  
  .project-list ul li:hover .txt h6 {
    color: #fff
  }

  @media screen and (max-width: 1441px) {
    .main {
        padding-top: 80px;
        padding-bottom: 80px
    }
  }

  @media screen and (max-width: 1367px) {
    .main {
        padding-top: 70px;
        padding-bottom: 70px
    }
  }

  @media screen and (max-width: 1281px) {
    .main {
        padding-top: 60px;
        padding-bottom: 60px
    }
    .project-list ul li {
        width: 33.3333%
    }
  }

  @media screen and (max-width: 1171px) {
    .project-list ul {
        margin: -15px -15px 0
    }
  
    .project-list ul li {
        padding: 15px
    }
  }

  @media screen and (max-width: 992px) {
    .main {
        padding-top: 50px;
        padding-bottom: 50px
    }
  }

  @media screen and (max-width: 768px) {
    .main {
        padding-top:35px;
        padding-bottom: 30px
    }
    .project-list ul li {
        width: 50%
    }
  
    .project-list ul li .txt {
        left: 10px;
        right: 10px;
        bottom: 15px;
        padding: 15px
    }
  
    .project-list ul li .txt h6 {
        line-height: 22px;
        height: 44px
    }
  }

  @media screen and (max-width: 576px) {
    .project-list ul {
        margin: -6px -6px 0
    }
  
    .project-list ul li {
        padding: 6px
    }
  }

  @media screen and (max-width: 480px) {
    .project-list ul {
        margin: -6px 0 0
    }
  
    .project-list ul li {
        width: 100%;
        padding: 6px 0
    }
  }