.part4 {
    padding: 38.5px 0;
}

.part4 .layout .box {
    /* margin-top: 64px; */
}

.part4 .layout .box ul {
    margin-bottom: 40px;
}

.part4 .layout .box ul li {
    float: left;
    margin-right: 32px;
    margin-top: 20px;
}

.part4 .layout .box ul li:nth-child(2n) {
    margin-right: 0;
}

.part4 .layout .box ul li:nth-child(1),
.part4 .layout .box ul li:nth-child(2) {
    margin-top: 0;
}

.part4 .layout .box ul li a {
    display: block;
}

.part4 .layout .box ul li a .imgbox {
    position: relative;
    width: 584px;
    height: 304px;
    border: 1px solid #979797;
}

.part4 .layout .box ul li a .imgbox img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.part4 .layout .box ul li a .imgbox .play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: block;
    width: 89px;
    height: 89px;
}