html,body{
    overflow: hidden;
}
.main-item{
    width: 30%;
}
.main-item:nth-of-type(2n){
    margin-top: 10%;
}
main{
    height: 65%;
    background-image: url(../images/queryPlatform/queryPlatform-bg.png);
    background-size: 100% 100%;
    padding: 69px 15% 0;
    box-sizing: border-box;
    display: flex;
    align-items: center;
}
.main-content{
    width: 100%;
    display: flex;
    justify-content: space-between;
}
.href-icon{
    width: 102px;
}
.main-item{
    float: left;
    cursor: pointer;
}
.main-item .item-t{
    font-size: 23px;
    color: #333;
    margin: 15px 0 25px;
}
.href-btn-t{
    color: #004297;
    font-size: 14px;
    margin-bottom: 14px;
}
.href-btn-line{
    width: 100%;
    height: 4px;
    background-color: #ccc;
    transition: background-color 0.3s;
}