.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5); /* 半透明黑色 */
    z-index: 1000;
    display: none;
}
.overlay .video-big {
    position: relative;
    width: 100%;
    height: 100%;
}
.video-big .video-box {
    position: absolute;
    /* width: 80%;
    height: 80%; */
    width: 80%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    justify-content: center;
    align-items: center;
}

.video-box .video {
    width: 100%;
    max-height: 70vh;
}


.list-box {
    margin: 20px 0;
    gap: 20px;
}

.video-item {
    width: 280px;
    height: 240px;
    border-radius: 10px;
    background-color: #fff;
    overflow: hidden;
    transition: all .3s;
}

.video-item:hover {
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

.video-item .video-img {
    height: 160px;
    overflow: hidden;
}

.video-title {
    margin: 10px 8px;
    font-size: 20px;
    color: #1D1B1B;
}

.video-time {
    margin: 6px 8px;
    font-size: 14px;
    font-weight: bold;
}

.play-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 40px;
    border-radius: 30px;
    transition: all .3s;
    cursor: pointer;
    transform-origin:center;
    background-color: #fff;
}

.play-btn:hover {
    transform: translate(-50%, -60%);
}

/* 手机 */
@media screen and (max-width:576px) {
    .video-item {
        width: 45%;
        height: 160px;
    }

    .video-item .video-img {
        height: 104px;
    }

    .video-title {
        margin: 5px 4px;
        font-size: 18px;
    }
    
    .video-time {
        margin: 2px 4px;
        font-size: 12px;
        font-weight: bold;
    }
}