html {
    width: 100%;
    height: 100%;
}

body {
    margin: 0;
    box-sizing: border-box;
    background-image: url("../images/device_dewn_bg.png");
    background-size: 100% 100%;
    width: 100%;
    height: 100%;
    overflow-x: hidden;
    overflow-y: hidden;
    position: relative;
    min-width: 1600px;
    min-height: 800px;
}

.download_content {
    box-sizing: border-box;
    position: absolute;
    width: 100%;
    height: 474px;
    left: 0;
    top: calc(50% - 237px);
    padding: 0 15%;
}

.download_content .picture {
    float: left;
    width: 520px;
    height: 400px;
}

.download_content .tool {
    margin-top: 80px;
    float: left;
    margin-left: 130px;
}

.download_content .tool .logo {
    height: 34px;
}

.download_content .tool .logo img {
    width: 34px;
    height: 34px;
    float: left;
}

.download_content .tool .logo div {
    margin-left: 15px;
    display: inline-block;
    line-height: 34px;
    font-weight: 400;
    font-size: 19.86px;
    color: #666666;
    letter-spacing: 0;
}

.download_content .tool .title {
    margin-top: 14px;
    font-family: SourceHanSansSC-Bold;
    font-weight: Bold;
    font-size: 23.57px;
    color: #333333;
    letter-spacing: 0;
}

.download_content .tool .btn {}

.download_content .tool .btn .btn_item {
    margin-top: 48px;
    width: 190px;
    height: 76px;
    background: #D0E2FF;
    border: 1px solid #1467ED;
    border-radius: 8px;
}
.download_content .tool .btn .btn_item :hover{
    cursor: pointer;
}
.download_content .tool .btn .btn_item .btn_logo {
    text-align: center;
    margin-top: 13px;
}

.download_content .tool .btn .btn_item .btn_logo img {
    width: 20px;
    height: 20px;
}

.download_content .tool .btn .btn_item .btn_logo span {
    font-family: SourceHanSansSC-Normal;
    font-weight: 400;
    font-size: 18px;
    color: #1467ED;
    letter-spacing: 0;
}

.download_content .tool .btn .btn_item .btn_v {
    text-align: center;
    margin-top: 3px;
}

.download_content .tool .btn .btn_item .btn_v span {
    font-family: SourceHanSansSC-Normal;
    font-weight: 400;
    font-size: 15px;
    color: #1467ED;
    letter-spacing: 0;
}

.download_content .tool .btn .btn_item .btn_v img {
    width: 12px;
    height: 14px;
}

.download_content .tool .des {
    margin-top: 24px;
    font-family: PingFangSC-Regular;
    font-weight: 400;
    font-size: 12px;
    color: #707070;
}