.scroll-wrap {
    left:50%; margin-left:-960px;
    width: 1920px;           /* 容器宽度（自适应） */
    height: 1080px;          /* 你的图片高度 */
    overflow: hidden;
    background: transparent;
    position: absolute; z-index:887;
}

.scroll-content {
    display: flex;
    width: max-content;
    animation: scroll-left 10s linear infinite;
}

@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }
    100% {
        /* -100%是图片的总宽度，即两张拼接图的宽度/2 */
        transform: translateX(-50%);
    }
}
.scroll-content img {
    /* 避免间隙，设为块元素 */
    display: block;
    height: 1080px;         /* 与容器高度一致 */
    pointer-events: none;
}


#Download {
    width: 764px;
    height: 172px;
    text-align: center;
    position: absolute;
    top: 840px;
    left: 50%;
    margin-left: -370px;
    z-index: 51;
    border-radius: 5px;
    background: url(./down.png) no-repeat left top;
}
#Download .btn_down_s1 {
    float: left;
    width: 240px;
    height: 100px;
    text-indent: -999em;
    margin-left: 80px;
    margin-top: 0px;
}
#Download .btn_down_s2 {
    float: left;
    width: 96px;
    height: 100px;
    text-indent: -999em;
    margin-left: 0px;
    margin-top: 0px;
}
#Download .btn_down_s3 {
    float: left;
    width: 96px;
    height: 100px;
    text-indent: -999em;
    margin-left: 0px;
    margin-top: 0px;
}
#Download .btn_down_s4 {
    float: left;
    width: 96px;
    height: 100px;
    text-indent: -999em;
    overflow: hidden;
    margin-left: 0px;
    margin-top: 0px;
}