.category-section {
    padding: 120px 0;
}

.section-title {
    text-align: center;
}

.category-section .category-grid {
    margin-top: 50px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.category-section .category-card {
    position: relative;
}

.category-section .category-grid .picCover {
    padding-top: 157.82%;
}

.category-section .category-grid .pic {
    border-radius: 20px;
}

.category-section .category-grid .overlay {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    padding: 0 39px 65px;
    text-align: center;
    font-family: 'Poppins-Medium';
}

.category-section .category-grid h3 {
    font-weight: 500;
    font-size: 28px;
    color: #FFFFFF;
    line-height: 1.35;
}

.category-section .category-grid p {
    font-weight: 500;
    font-size: 14px;
    color: #FFFFFF;
    line-height: 26px;
    opacity: 0.8;
    margin-top: 9px;
}

.product-showcase {
    display: flex;
    gap: 67px;
    margin-bottom: 111px;
    align-items: flex-start;
}

.sidebar {
    position: sticky;
    width: 351px;
    flex-shrink: 0;
    top: 120px;
}

.menu-item:not(:last-child){
    margin-bottom: 15px;
}

.menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    padding: 10px 0;
    font-weight: 500;
    font-size: 22px;
    color: #222222;
    line-height: 30px;
    cursor: pointer;
    font-family: 'Poppins-Medium';
}

.menu-header span {
    flex: 1;
}

.menu-header i {
    font-size: 18px;
    color: rgba(107, 107, 107, 1);
}

.menu-item.active .menu-header i {
    color: rgba(59, 255, 217, 1);
    transform: rotate(90deg);
}

/* 下箭头是绿色的 */

/* Submenu */
.submenu {
    margin-top: 5px;
    padding: 0 21px;
    display: none;
}

.submenu li {
    padding: 8px 0;
}

.submenu li a {
    font-size: 19px;
    color: rgba(68, 68, 68, 1);
    transition: 0.3s;
}

.submenu li.active a,
.submenu li a:hover {
    color: rgba(59, 255, 217, 1);
}

.product-list {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 66px;
}

.product-item {
    text-align: center;
}

.product-item .picCover {
    padding-top: 50.17%;
}

.product-item .pic {
    border-radius: 10px;
}

.product-img-box img {
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.3s;
}

.product-item h3 {
    font-weight: 700;
    margin-top: 1.7em;
    transition: 0.3s;
    font-family: 'Poppins-Medium';
}

.product-item:hover h3 {
    color: rgba(59, 255, 217, 1);
}

.product-item p {
    /* font-family: 'Poppins-Medium'; */
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    line-height: 28px;
    margin-top: 20px;
}

.product-item .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    border: 2px solid #000000;
    padding: 0 19px;
    line-height: 36px;
    font-family: 'Poppins-Medium';
    font-weight: 500;
    font-size: 14px;
    color: #000000;
    transition: all 0.3s;
    text-transform: capitalize;
    margin-top: 20px;
    gap: 0 6px;
}

.product-item .btn i {
    font-weight: bold;
    transition: all .6s;
}

.product-item .btn:hover {
    border-color: rgba(59, 255, 217, 1);
    background:rgba(59, 255, 217, 1);
}
.product-item .btn:hover i{
    transform:rotate(45deg);
}
.help-section {
    padding: 53px 0 100px;
    text-align: center;
    border-top: 1px solid rgba(229, 229, 229, .8);
}

.help-title {
    font-size: 36px;
    font-weight: 900;
    margin-bottom: 50px;
    text-transform: uppercase;
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
    margin-top: 40px;
}

.help-card {
    background-color: #f2f2f2;
    /* 默认灰色背景 */
    padding: 59px 39px;
    border-radius: 12px;
    text-align: left;
    display: flex;
    flex-direction: column;
    transition: 0.3s;
}

.help-card:hover {
    background-color: rgba(0, 0, 0, 1);
    color: #fff;
}

.help-card .icon-wrap {
    width: 56px;
    height: 56px;
    margin-bottom: 20px;
}

.help-card .icon-wrap img {
    display: block;
    max-width: 100%;
    max-height: 100%;
}

.help-card:hover .icon-wrap img {
    filter: brightness(0) invert(1);
    transition: filter 0.3s ease;
}

.help-card.active .icon-wrap {
    color: #fff;
}

/* 黑色卡片图标白色 */
.help-card:not(.active) .icon-wrap {
    color: #333;
}

.help-card h3 {
    font-weight: 600;
    font-size: 20px;
    color: #000000;
    line-height: 1.5;
    transition: all 0.3s;
    font-family: 'Poppins-SemiBold';
}

.help-card p {
    margin-top: 9px;
    font-family: Poppins;
    font-weight: 400;
    font-size: 14px;
    color: #777777;
    line-height: 24px;
    transition: all 0.3s;
}

.help-link {
    margin-top: 18px;
    line-height: 1;
    font-weight: 500;
    font-size: 14px;
    color: #777777;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s;
    font-family: 'Poppins-Medium';
}

.help-card:hover .help-link {
    color: rgba(82, 255, 221, 1);
}

.help-card:hover h3,
.help-card:hover p {
    color: rgba(255, 255, 255, 1);
}

.help-link .iconfont {
    font-weight: bold;
}

.header-section {
    background-color: RGBA(240, 240, 240, 1);
    padding: 120px 0;

}

.header-section .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-img {
    width: 52.56%;
}

.header-img img {
    display: block;
    max-width: 100%;
}

.header-text {
    width: 40.68%;
}

.header-text h1 {
    /* font-weight: 800; */
    font-style: italic;
    font-family: 'Poppins-Bold';
}

.header-text p {
    width: 530px;
    font-weight: 400;
    font-size: 20px;
    color: #666666;
    line-height: 34px;
    margin-top: 10px;
    max-width: 100%;
}

.banner-section {
    position: relative;
    padding: 120px 0 88px;
}

.banner-section .container {
    position: relative;
}

.banner-section .pic {
    border-radius: 20px;
}

.banner-section .pic img {
    min-height: 430px;
    object-fit: cover;
}

.banner-content {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    padding: 0 53px 53px;
    text-align: center;
    z-index: 2;
}

.banner-content h2 {
    /* font-weight: 600; */
    color: #FFFFFF;
    line-height: 1.36;
    font-family: 'Poppins-SemiBold';
}

.banner-content .btn-cyan {
    display: inline-flex;
    background-color: rgba(59, 255, 217, 1);
    color: #000;
    padding: 0 38px;
    line-height: 60px;
    border-radius: 30px;
    transition: 0.3s;
    gap: 0 8px;
    margin-top: 30px;
    font-weight: 400;
    font-size: 16px;
}

.banner-content .btn-cyan .iconfont {
    font-size: 25px;
}

.banner-content .btn-cyan:hover {
    opacity: 0.9;
}

.features-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-item {
    text-align: center;
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: #F4F4F4;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.feature-icon img {
    max-width: 80%;
    max-height: 80%;
}

.feature-item h4 {
    font-weight: 500;
    font-size: 18px;
    color: #222222;
    line-height: 24px;
    font-family: 'Poppins-Medium';
    margin-top: 1.3em;
}

.feature-item p {
    font-weight: 400;
    font-size: 15px;
    color: #666666;
    line-height: 24px;
    width: 282px;
    max-width: 100%;
    margin: 1em auto 0;
}

.dark-section-iot {
    margin-top: 118px;
    padding: 120px 0;
    background-color: rgba(0, 0, 0, 1);
}

.dark-section-iot img {
    display: block;
    width: 100%;
    border-radius: 20px;
}

.dark-section-iot img:not(:last-child) {
    margin-bottom: 34px;

}

.specs-section {
    padding: 120px 0;
    background-color: #fff;
}

.specs-layout {
    display: flex;
    justify-content: center;
    align-items: center;
}

.specs-content {
    width: 55.37%;
}

.specs-content h2 {
    margin-bottom: 1.47em;
    text-transform: uppercase;
    text-align: left;
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.specs-table td {
    padding: 8px 0;
    line-height: 30px;
}

.specs-table td:first-child {
    font-weight: 400;
    font-size: 18px;
    color: #666666;
    width: 37%;
    padding-right: 10px;
}

.specs-table td:last-child {
    font-size: 20px;
    /* font-weight: bold; */
    color: #000;
    font-family: 'Poppins-SemiBold';
}

.specs-img {
    width: 40.81%;
    margin: 0 auto;
}

.specs-img img {
    max-width: 100%;
}

.comp-container h2 {
    text-transform: uppercase;
    text-align: left;
}

.comp-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 49px;
}

.comp-table th {
    background: rgba(248, 248, 248, 1);
    /* font-weight: bold; */
    font-size: 17px;
    color: #000000;
    line-height: 28px;
    text-align: center;
    padding-top: 25px;
    padding-bottom: 25px;
    font-family: 'Poppins-Medium';
}

.comp-table th:first-child {
    border-top-left-radius: 20px;
}

.comp-table th:last-child {
    border-top-right-radius: 20px;
}

.comp-table td {
    padding: 20px;
    text-align: center;
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    line-height: 30px;
    background-color: rgba(248, 248, 248, 1);
}

.comp-table th:nth-child(2n),
.comp-table td:nth-child(2n) {
    background-color: rgba(242, 242, 242, 1);
}

.comp-table th:nth-child(2n+1),
.comp-table td:nth-child(2n+1) {
    border-bottom: 1px solid #fff;
}

.comp-table td b {
    font-weight: 600;
    font-size: 16px;
    color: #000000;
    line-height: 24px;
    margin-top: 14px;
    display: block;
    text-align: center;
}

.comp-model-img {
    height: 33px;
    margin: 0 auto;
    display: block;
}

.check-icon {
    color: #000;
}

.accessories-section {
    padding: 90px 0;
    background-color: #fff;
}

.acc-container {
    margin: 0 auto;
}

.acc-container h2 {
    text-align: left;
}

.acc-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 54px;
}

.acc-card {
    padding: 40px;
    background: #F3F3F3;
    border-radius: 10px;
    text-align: center;
    transition: 0.3s;
}

.acc-card:hover {
    transform: translateY(-5px);
}

.acc-card .pic {
    height: 156px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.acc-card .pic img {
    max-width: 100%;
    max-height: 100%;
}

.acc-card p {
    /* font-weight: 500; */
    font-size: 22px;
    color: #000000;
    line-height: 26px;
    margin-top: .81em;
    transition: all 0.3s;
    font-family: 'Poppins-Medium';
}

.acc-card:hover p {
    color: rgba(59, 255, 217, 1);
}

.downloads-section {
    background: url(../img//product-details-9.jpg);
    background-size: cover;
    border-radius: 20px;
    overflow: hidden;
    padding: 74px 60px;
    margin-bottom: 128px;
}

.downloads-content {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 50px;
}

.dl-text h3 {
    color: #FFFFFF;
    /* font-weight: bold; */
    font-family: 'Poppins-Bold';
}

.dl-text p {
    width: 668px;
    font-weight: 400;
    font-size: 16px;
    color: #FFFFFF;
    line-height: 24px;
    margin-top: .8em;
}

.btn-white {
    background: #fff;
    color: #000;
    line-height: 57px;
    padding: 0 33px;
    border-radius: 60px;
    font-weight: bold;
    font-size: 14px;
    color: #000000;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s;
    font-family: 'Poppins-Medium';
}

.btn-white:hover {
    background: rgba(59, 255, 217, 1);
}

.btn-white .iconfont {
    font-size: 20px;
}
@media (max-width:1440px) {
    .product-list{
        gap: 40px;
    }
    .product-item h3{
        margin-top: 1.1em;
    }
    .product-item p{
        margin-top: 10px;
    }
}
@media (max-width:1280px) {
    .dl-text{
        flex: 1;
        margin-right: 50px;
    }
    .dl-text p{
        width: 100%;
    }
    .downloads-content{
        padding: 0;
    }
    .feature-item p{
        width: 100%;
    }
    .comp-table{
        min-width: 1280px;
    }
}
@media (max-width:1199px) {
    .menu-header{
        font-size: 20px;
    }
    .submenu li a{
        font-size: 18px;
    }
    .product-item h3{
        margin-top: .9em;
    }
    .product-showcase{
        gap: 40px;
    }
    .sidebar{
        width: 300px;
    }
    .category-section .category-grid{
        gap: 20px;
    }
    .acc-card{
        padding: 30px;
    }
    .acc-card p{
        font-size: 20px;
    }
    .feature-item p{
        margin-top: .5em;
    }
    .feature-item h4{
        margin-top: 1em;
    }
    .features-row{
        grid-template-columns: repeat(2,1fr);
    }
    .accessories-section,
    .specs-section,
    .dark-section-iot,
    .banner-section,
    .header-section{
        padding: 80px 0;
    }
    .dark-section-iot{
        margin-top: 80px;
    }
    .downloads-section{
        margin-bottom: 80px;
    }
    .acc-grid,
    .comp-table{
        margin-top: 45px;
    }
    .header-text{
        width: 43%;
    }
    .specs-content h2{
        margin-bottom: 30px;
    }
    .specs-table td:first-child{
        font-size: 16px;
    }
    .specs-table td:last-child{
        font-size: 18px;
    }
    .category-section{
        padding: 80px 0;
    }
    .product-showcase{
        margin-bottom: 80px;
    }
    .help-section{
        padding-bottom: 80px;
    }
    .category-section .category-grid{
        margin-top: 45px;
    }
    .category-section .category-grid h3{
        font-size: 26px;
    }
    .category-section .category-grid .overlay{
        padding: 0 20px 30px;
    }
}
@media (max-width:1024px) {
    .sidebar{
        position: relative;
        top: 0;
        width: 100%;
    }
    .product-list{
        flex: none;
        width: 100%;
    }
    .product-showcase{
        flex-direction: column;
    }
    .category-section .category-grid{
        grid-template-columns: repeat(2,1fr);
    }
    .category-section .category-grid h3{
        font-size: 24px;
    }
    .category-section{
        padding: 70px 0;
    }
    .product-showcase{
        margin-bottom: 70px;
    }
    .help-section{
        padding-bottom: 70px;
    }
    .category-section .category-grid{
        margin-top: 40px;
    }
    .acc-grid{
        grid-template-columns: repeat(2,1fr);
    }
    .acc-card p{
        font-size: 18px;
    }
    .specs-img,
    .specs-content{
        width: 100%;
    }
    .specs-img{
        margin-top: 30px;
    }
    .specs-layout{
        flex-direction: column;
    }
    .accessories-section,
    .specs-section,
    .dark-section-iot,
    .banner-section,
    .header-section{
        padding: 70px 0;
    }
    .dark-section-iot{
        margin-top: 70px;
    }
    .downloads-section{
        margin-bottom: 70px;
    }
    .acc-grid,
    .comp-table{
        margin-top: 40px;
    }
    .header-text p{
        font-size: 18px;
        line-height: 24px;
    }
    .downloads-section{
        padding: 60px 40px;
    }
    .help-card{
        padding: 30px;
    }
    .help-card .icon-wrap{
        width: 45px;
        height: 45px;
        margin-bottom: 10px;
    }
    .help-card h3{
        font-size: 18px;
    }
}
@media (max-width: 768px) {
    .category-section .category-grid h3{
        font-size: 22px;
    }
    .category-section{
        padding: 60px 0;
    }
    .product-showcase{
        margin-bottom: 60px;
    }
    .help-section{
        padding-bottom: 60px;
    }
    .category-section .category-grid{
        margin-top: 30px;
    }
    .downloads-section{
        padding: 50px 30px;
    }
    .acc-grid{
        grid-template-columns: repeat(1,1fr);
    }
    .specs-content h2{
        margin-bottom: 15px;
    }
    .features-row{
        grid-template-columns: repeat(1,1fr);
    }
    .header-text,
    .header-img{
        width: 100%;
    }
    .header-text{
        margin-top: 35px;
    }
    .header-section .container{
        flex-direction: column;
    }
    .accessories-section,
    .specs-section,
    .dark-section-iot,
    .banner-section,
    .header-section{
        padding: 60px 0;
    }
    .dark-section-iot{
        margin-top: 60px;
    }
    .downloads-section{
        margin-bottom: 60px;
    }
    .acc-grid,
    .comp-table{
        margin-top: 35px;
    }
    .banner-content{
        padding: 0 25px 25px;
    }
    .downloads-content{
        flex-direction: column;
    }
    .dl-text{
        margin-right: 0;
    }
    .btn-white{
        margin-top: 35px;
    }
    .product-list{
        grid-template-columns: repeat(1,1fr);
    }
    .help-grid{
        margin-top: 35px;
    }
    .help-grid{
        grid-template-columns: repeat(1,1fr);
    }
}
@media (max-width: 500px) {
    .help-card h3{
        font-size: 16px;
    }
    .help-card .icon-wrap{
        width: 40px;
        height: 40px;
    }
    .help-grid{
        margin-top: 30px;
    }
    .product-showcase{
        gap: 30px;
    }
    .category-section .category-grid p{
        line-height: 20px;
    }
    .category-section .category-grid .overlay{
        padding: 0 15px 20px;
    }
    .category-section .category-grid h3{
        font-size: 18px;
    }
    .category-section{
        padding: 50px 0;
    }
    .product-showcase{
        margin-bottom: 50px;
    }
    .help-section{
        padding-bottom: 50px;
    }
    .category-section .category-grid{
        margin-top: 30px;
    }
    .btn-white{
        margin-top: 25px;
        line-height: 48px;
        padding: 0 25px;
    }
    .downloads-section{
        padding: 40px 20px;
    }
    .specs-table td:first-child{
        font-size: 14px;
    }
    .specs-table td:last-child{
        font-size: 16px;
    }
    .feature-icon{
        width: 50px;
        height: 50px;
    }
    .banner-content .btn-cyan{
        line-height: 50px;
        padding: 0 30px;
        margin-top: 20px;
    }
    .header-text h1{
        font-size: 22px;
    }
    .banner-content h2{
        font-size: 20px;
    }
    .header-text p{
        font-size: 16px;
    }
    .header-text{
        margin-top: 30px;
    }
    .accessories-section,
    .specs-section,
    .dark-section-iot,
    .banner-section,
    .header-section{
        padding: 50px 0;
    }
    .dark-section-iot{
        margin-top: 50px;
    }
    .downloads-section{
        margin-bottom: 50px;
    }
    .acc-grid,
    .comp-table{
        margin-top: 30px;
    }
}