.down-doc {
    margin: auto;
    padding-top: 64px;
    padding-bottom: 40px;
    width: 1200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.down-doc .title {
    line-height: 78px;
    font-size: 56px;
    font-weight: 600;
    color: #0B0B0B;
}

.down-doc .describe {
    padding-top: 20px;
    line-height: 33px;
    font-size: 24px;
    font-weight: 600;
    color: #2B2B2B;
}

.down-list-bg {
    margin-bottom: 64px;
    padding-top: 60px;
    padding-bottom: 64px;
    background-color: #FFF4CB;
}

.down-list {
    margin: auto;
    width: 1200px;
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
}

.down-list .item {
    position: relative;
    width: 268px;
    height: 262px;
    cursor: pointer;
}

.down-list .item .item-frame {
    position: absolute;
    top: 0;
    left: 0;
    width: 268px;
    height: 262px;
    border: 4px solid #000000;
    border-radius: 16px;
    z-index: 10;
}

.down-list .item .item-bg {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 268px;
    height: 262px;
    border-radius: 16px;
    z-index: 5;
}

.down-list .item .item-bg-01 {
    background-color: #DCF2FF;
}

.down-list .item .item-bg-02 {
    background-color: #DDFFEF;
}

.down-list .item .item-bg-03 {
    background-color: #FFDFF5;
}

.down-list .item .item-bg-04 {
    background-color: #bacff2;
}

.down-list .item .item-info {
    position: absolute;
    top: 8px;
    top: 8px;
    width: 268px;
    height: 262px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 20;
}

.down-list .item .item-info .item-icon {
    width: 96px;
    height: 96px;
    background-color: #FFFFFF;
    border-radius: 16px;
    display: flex;
}

.down-list .item .item-info .item-icon img {
    width: 96px;
    height: 96px;
}

.down-list .item .item-info .item-title {
    padding-top: 40px;
    line-height: 46px;
    font-size: 32px;
    font-weight: 600;
    color: #000000;
    text-align: center;
}

.video-demo {
    margin: auto;
    margin-top: 20px;
    width: 166px;
    height: 56px;
    line-height: 52px;
    font-size: 24px;
    font-weight: 600;
    color: #000000;
    text-align: center;
    border: 3px solid #000000;
    border-radius: 16px;
    cursor: pointer;
}