.back_index {
    height: 400px;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    width: 100%;
}

* {
    margin: 0;
    padding: 0;
}

.all {
    width: 100%;
}

a {
    text-decoration: none;
}

.hmc3txt strong {
    font-size: 32px;
    width: 89%;
    height: 48px;
    overflow: hidden;
    display: inline-block;
}

.hmc3txt h6 {
    font-size: 18px;
}

.hmc3txt {
    position: absolute;
    left: 5.37vw;
    top: 50%;
    transform: translateY(-50%);
    color: #fff;
    /* padding-bottom: 100px; */
    box-sizing: border-box;
    
}

.my_s {
    width: 100%;
    overflow: hidden;
}

.hmc3txt h6 {
    font-size: 20px;
    line-height: 30px;
    margin-bottom: 10px;
}

.hmc3txt p {
    font-size: 14px;
    line-height: 28px;
    margin-bottom: 20px;
    max-width: 425px;
    width: 95%;
    height: 170px;
    word-break: break-all;
    text-overflow: ellipsis;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 6;
    -webkit-box-orient: vertical;
}

.hmc3btn {
    font-size: 14px;
    line-height: 50px;
    height: 52px;
    width: 180px;
    color: #FFF;
    border: 1px solid #FFF;
    text-align: center;
    display: inline-block;
}