.about-cont {
    padding: 280px 0 120px;
}

.about-cntop {
    display: flex;
    justify-content: space-between;
}

.about-cntp-tit {
    font-size: 130px;
    font-weight: 600;
    color: #ffffff;
    margin: -30px 0;
}

.about-cntp-txt {
    width: 50%;
    font-size: 22px;
    color: #ffffff;
}




/* 视频区域 */
.video-section {
    margin-top: 100px;
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
}

.video-cover {
    width: 100%;
    height: auto;
    display: block;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}








@media only screen and (max-width: 1540px) {
    .about-cont {
        padding: 240px 0 100px;
    }

    .about-cntp-tit {
        font-size: 110px;
        margin: -25px 0;
    }

    .about-cntp-txt {
        font-size: 18px;
    }


    /* 视频区域 */
    .video-section {
        margin-top: 80px;
    }



}

@media only screen and (max-width: 1440px) {

    .about-cont {
        padding: 180px 0 80px;
    }

    .about-cntp-tit {
        font-size: 90px;
        margin: -20px 0;
    }

    .about-cntp-txt {
        font-size: 16px;
    }


    /* 视频区域 */
    .video-section {
        margin-top: 60px;
    }

}

@media only screen and (max-width: 769px) {

    .about-cont {
        padding: 1.4rem .1rem .8rem;
    }

    .about-cntop{
        flex-direction: column;
    }
    .about-cntp-tit {
        font-size: 64px;
        margin: -15px 0;
    }
    .about-cntp-txt {
        width: 100%;
        margin-top: .5rem;
    }
    .video-section {
        margin-top: .6rem;
    }

}