html, body {
    background: #041040;
    margin: 0;
    padding: 0;
}

h2, h3, h4, h5, h6 {
    margin: 0;
    padding: 0;
}

ul, li {
    list-style: none;
}

span {
    color: #FFFFFF;
}

.container {
    margin: 0 auto;
}

.container h1 {
    margin: 0 auto;
    text-align: center;
    background: url("../images/remote_upgrade/bg5.png") no-repeat center top;
    background-size: cover;
    height: 494px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container h1 img {
    width: 796px;
}

.a-con {
    background: url("../images/remote_upgrade/bg1.png") no-repeat center top;
    background-size: cover;
    width: 1102px;
    margin: 0 auto;
    height: 300px;
}

.a-con .a-title {
    text-align: center;
    padding-top: 50px;
}

.a-con .a-title img {
    width: 256px;
}

.a-con .a-word {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-content: center;
    text-align: center;
    color: #FFFFFF;
}

.a-con .a-word span {
    margin-top: 10px;
    font-size: 16px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
}

.a-con .a-word span i {
    font-style: normal;
    color: #F9C756;
}

.a-con .a-btn {
    text-align: center;
    margin-top: 35px;
}

.a-con .a-btn a {
    width: 169px;
    height: 46px;
    line-height: 46px;
}

.a-fun {
    width: 1102px;
    margin: 0 auto;
    text-align: center;
}

.a-fun .a-title {
    font-size: 30px;
    font-family: SourceHanSansCN-Normal, SourceHanSansCN;
    font-weight: 400;
    color: #FFFFFF;
}

.a-fun .a-function {
    margin-top: 60px;
}

.a-fun .a-line {
    width: 89px;
    height: 3px;
    background: #00BEFF;
    margin: 23px auto 0;
}

.a-fun .a-content {
    margin-top: 152px;
}

.a-fun .a-content .a-more {
    display: flex;
    justify-content: space-between;
}

.a-fun .a-content .a-more .a-class {
    position: relative;
    width: 510px;
    height: 333px;
    background: linear-gradient(180deg, #172578 0%, rgba(31, 93, 234, 0) 100%);
    border-radius: 10px;
}

.a-fun .a-content .a-more .a-class img {
    width: 291px;
    height: 171px;
    position: absolute;
    top: -110px;
    left: 100px;
}

.a-fun .a-content .a-more .a-class h4 {
    margin-top: 80px;
    font-size: 26px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #FFFFFF;
}

.a-fun .a-content .a-more .a-class span {
    display: inline-block;
    font-size: 16px;
    height: 90px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #B3BCD9;
    line-height: 30px;
    padding: 20px 70px 0;
}

.a-fun .a-content .a-more .a-class .a-btn {
    margin-top: 20px;
}

.a-fun .a-content .a-more .a-class .a-btn a {
    width: 148px;
    height: 44px;
    line-height: 44px;
}

.a-fun .a-devices {
    background: #0E225C;
    border-radius: 10px;
    padding-top: 30px;
    padding-bottom: 40px;
    margin-top: 60px;
}

.a-fun .a-devices h4 {
    font-size: 26px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #FFFFFF;
}

.a-fun .a-devices .i-sub-title {
    font-size: 16px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #B3BCD9;
    margin-top: 17px;
}

.a-fun .a-devices ul {
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-top: 10px;
    padding: 0 40px;
}

.a-fun .a-devices ul li {
    display: flex;
    width: 330px;
    margin-top: 40px;
    margin-left: 10px;
}

.a-fun .a-devices ul li .device-img {
    width: 130px;
    height: 160px;
    background: rgb(19, 37, 137);
}

.a-fun .a-devices ul li .device-img img {
    width: 100%;
}

.a-fun .a-devices ul li .device-info {
    margin-left: 20px;
}

.a-fun .a-devices ul li .device-info span {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    font-size: 14px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #FFFFFF;
    line-height: 30px;
    white-space: nowrap;
}

.a-fun .a-devices ul li .device-info span:first-child {
    font-size: 16px;
}

.a-fun .a-devices ul li .device-info .a-btn {
    width: 115px;
    height: 36px;
    line-height: 36px;
    margin-top: 25px;
}

.a-fun .a-devices ul li .device-info .a-btn a {
    display: block;
    font-size: 14px;
    cursor: pointer;
}

.container footer {
    font-size: 12px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #FFFFFF;
    margin: 60px auto 20px;
    text-align: center;
}

.a-btn a {
    display: inline-block;
    background: url("../images/remote_upgrade/btn.png") no-repeat center top;
    text-align: center;
    text-decoration: none;
    font-size: 18px;
    font-family: PingFangSC-Semibold, PingFang SC;
    font-weight: 600;
    color: #FFFFFF;
    background-size: 100% 100%;
}

.a-btn a:hover {
    background-image: url("../images/remote_upgrade/btn_hover.png");
}