#header{
  position: sticky;
  top: 0;
  left: 0;
  z-index: 999;
}
.city-scan-window{
  width: 100%;
  height: 400px;
  background-image: url('../images/city-scan.png');
  background-size: cover;
  background-repeat: no-repeat;

  .window-view{
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 60%;
    height: 100%;
    margin: 0 auto;
    
    .header-btn{
      color: #fff;
      padding: 8px 12px;
      border-radius: 4px;
      cursor: pointer;
      background-color: #2F5596;;
    }
  }
  .title{
    /* height: 100%; */
    color: #fff;
    font-size: 28px;
    font-weight: 600;
  }
  .brief-introduction{
    width: 66%;
    color: #fff;
    font-size: 16px;
    line-height: 30px;
    margin-top: 18px;
  }
}
.product-introduce{
  .title{
    font-size: 36px;
    color: #1E2128;
    margin-bottom: 20px;
  }
  .introduce-item{
    padding: 70px 0;
    &:nth-child(2n + 1){
      background-color: #F3F5F8;
    }
  }
  .investigate-background{
    ul{
      margin-top: 20px;
      li{
        width: 48%;
        line-height: 20px;
        margin-bottom: 10px;
        padding: 10px 0;
        text-align: center;
        border-radius: 4px;
        background-color: #fff;
      }
    }
  }
  .organizational-process{
    img{
      height: 360px;
    }
  }
  .investigate-methods{
    img{
      width: 48%;
    }
    .applet{
      margin-bottom: 30px;
      img{
        margin-right: 20px;
      }
    }
    .web{
      img{
        margin-left: 20px;
      }
    }
    .investigate-methods-title{
      font-size: 28px;
      line-height: 38px;
      letter-spacing: 2px;
      margin-bottom: 20px;
    }
    p{
      line-height: 30px;
    }
  }
  .service-content{
    .service-content-item{
      position: relative;
      max-width: 48%;
      margin-right: 20px;
      box-shadow: 0px 2px 6px 0px rgba(216, 216, 216, 0.4);
      &:last-child{
        margin: 0;
      }
      .item-title{
        color: #fff;
        text-align: center;
        padding: 10px 0;
        font-size: 16px;
        background-color: #2F5596;
      }
      .tips{
        position: absolute;
        bottom: 0;
        left: 0;
        z-index: 10;
        color: #fff;
        padding: 10px 0;
        display: none;
        background-color: rgba(0,0,0,0.5);
      }
      &:hover .tips{
        display: block;
      }
    }
  }
  .project-experience{
    .project-experience-item{
      margin-bottom: 30px;
      img{
        width: 48%;
        margin-left: 20px;
      }
      &:last-child{
        margin: 0;
        img{
          margin-right: 20px;
        }
      }
      p{
        line-height: 28px;
      }
    }
  }
}