.banner{
    width: 90%;
    height: 400px;
    margin: 0px auto;
    margin-top: 15px;
}
.banner img{
    display: block;
    width: 100%;
    height: 100%;
    object-fit:cover;
}
.zhuti {
    display: flex;
    flex-wrap: wrap;
    width: 90%;
    height: 800px;
    margin: 0px auto;
    margin-bottom: 15px;
    background-color: rgb(243, 243, 243);
    justify-content: space-around;
    align-content: space-around;
}
.zhuti .tj{
    width: 30%;
    height: 48%;
    background-color: antiquewhite;
    border-radius: 5px;
    overflow: hidden;
}
.zhuti .tj .img{
    /* 相对定位 */
    position: relative;
    width: 100%;
    height: 88%;
    overflow: hidden;
}
.zhuti .tj .img img{
    width: 100%;
    height: 100%;
    object-fit:cover;
    margin: 0 auto;
}
.zhuti .tj .img:hover{
    cursor: pointer;
}
.zhuti .tj .img:hover .mask{
    top: 0;
}
.zhuti .tj .img .mask{
    /* 绝对定位 */
    position: absolute;
    top:100%;
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;

    background: #464646e8;
    color: #fff;

    /* 添加过渡 */
    transition: all .7s ease-out;
}
.mask h1{
    line-height: 50px;
}

.mask p{
    margin: 20px;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-line-clamp: 4;
    word-wrap: break-word;
    display: -webkit-box;
    -webkit-box-orient: vertical;
}
.zhuti .tj h3{
    width: 100%;
    line-height: 45px;
    text-align: center;
}