.BannerVideo1 {
    width: 100%;
    height: 90vh;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
}

    .BannerVideo1 .banner_title_box {
        position: absolute;
        z-index: 888;
        font-style: normal;
        font-weight: 700;
        font-size: 2.3rem;
        line-height: 1.8;
        text-transform: uppercase;
        color: #ffffff;
        bottom: 0;
        width: 100%;
        background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, #000000 100%);
    }

    .BannerVideo1 .banner_title {
        margin-top: 5%;
        text-align: left;
        margin-left: 12%;
        height: 160px;
        padding-left: 35px;
        border-left: solid 6px var(--color-secondary);
        margin: 0 auto;
        display: flex;
        align-items: flex-start;
    }

    .BannerVideo1 .example-marquee {
        position: relative;
        width: 100%;
        aspect-ratio: 16 / 9;
  	height: auto;
    }



@media (max-width: 1440px) {
    .BannerVideo1 .banner_title_box {
        position: relative;
        left: 0px;
        width: 100%;
        height: 260px;
        bottom: 260px;
    }

    .BannerVideo1 .banner_title {
        margin: 0 auto;
        position: relative;
        left: 0;
        bottom: 0;
    }
}

@media (max-width: 480px) {
    .BannerVideo1 {
         height: auto;        /* 不再硬吃 50vh */
    overflow: hidden;
    }

        .BannerVideo1 .banner_title {
            height: auto;
            padding-left: 18px;
            border-left: solid 6px var(--color-secondary);
            margin: 0 auto;
            position: absolute;
            left: 3%;
            bottom: 40px;
            padding-top: 10px;
        }

       .BannerVideo1 .example-marquee{
    width: 100%;         /* 改回滿版，別用 80% */
    height: auto;
    aspect-ratio: 16 / 9;  /* 核心：用 16:9 承接影片 */
    min-height: 0;
  }

        .BannerVideo1 .banner_title_box .fs-1 {
            line-height: 1.25 !important;
            font-size: 1.5rem !important;
        }

        .BannerVideo1 .banner_title_box {
            height: 200px;
            bottom: 200px;
            /* background:none; */
        }
}

.BannerVideo1 iframe {
    transition: opacity 500ms ease-in-out;
    transition-delay: 250ms;
}