body {
    margin: 0;
}

.nav {
    background-color: #181A1B;
    width: 100%;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: sticky;
    top: 0;
    z-index: 999;
}

.nav-container {
    display: flex;
    width: 1024px;
    align-items: center;
}

.nav-logo {
    font-size: 32px;
    font-family: PingFang SC;
    font-weight: 600;
    color: #F3F3F3;
}

.nav-divider {
    width: 4px;
    height: 29px;
    background: #FFFFFF;
    border-radius: 2px;
    margin: 0 10px 0 26px;
}

.navTitle {
    margin-left: 46px;
    font-size: 24px;
    font-family: PingFang SC;
    font-weight: 600;
    color: #F3F3F361;
    text-align: center;
    cursor: pointer;
}

.navTitle:hover {
    color: #F3F3F3;
}

.nav-active {
    padding-bottom: 10px;
    transition: padding-bottom 0.3s ease;
    /* 添加切换动效 */
}

.nav-underline {
    width: 0;
    /* 初始宽度为0 */
    height: 3px;
    margin: 0 auto;
    /* 确保初始位置居中 */
    background: #FFFFFF;
    border-radius: 2px;
    transition: all 0.3s ease;
    /* 添加滑动效果 */
    opacity: 0;
    /* 初始透明度为0 */
}

.navTitle.is-active .nav-underline {
    width: calc(100% - 18px);
    /* 激活时展开宽度 */
    margin: 0 auto;
    /* 激活时保持居中 */
    opacity: 1;
    /* 激活时显示 */
}

.is-active {
    color: #F3F3F3 !important;
    margin-top: 10px;
}

.top {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 980px;
    background-image: url(./img/bg.png);
    background-repeat: no-repeat;
    background-size: 100% 100%;
}

.top-title {
    font-size: 20px;
    font-family: PingFang SC;
    /* font-weight: 600; */
    color: #FFFFFF;
    line-height: 30px;
}

.top-subtitle {
    font-size: 60px;
    font-family: PingFang SC;
    margin-top: 20px;
    font-weight: 600;
    color: #FFFFFF;
    line-height: 60px;
}

.top-tagline {
    font-size: 16px;
    margin-top: 40px;
    font-family: PingFang SC;
    font-weight: 600;
    color: #FFFFFF;
    line-height: 16px;
}

.product {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #FFFFFF;
}

.product-content {
    width: 1024px;
    padding: 100px 0;
    display: flex;
    flex-direction: column;
}

.product-header {
    display: flex;
}

.product-title {
    line-height: 60px;
    font-size: 60px;
    font-family: PingFang SC;
    font-weight: 600;
    color: #181A1B;
}

.product-title-underline {
    height: 7px;
    width: calc(100% - 40px);
    background: #181A1B;
    margin: 24px 0 0 20px;
}

.product-body {
    padding: 100px 0 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.product-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 908px;
}

.product-name {
    line-height: 40px;
    font-size: 40px;
    font-family: PingFang SC;
    font-weight: 600;
}

.product-description {
    line-height: 30px;
    font-size: 20px;
    font-family: PingFang SC;
    /* font-weight: 600; */
    color: #181A1B;
    margin-top: 38px;
    width: 380px;
}

.product-qr {
    text-align: center;
    margin-left: 20px;
    /* 确保二维码框与描述内容对齐 */
}

.qr-placeholder {
    width: 150px;
    height: 150px;
    /* background-color: bisque; */
    display: flex;
    align-items: center;
}

.qr-text {
    margin-top: 20px;
    font-size: 14px;
    font-family: PingFang SC;
    font-weight: 500;
    color: #181A1B;
}

.product-images {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 800px;
    margin: 80px auto 0;
}

.product-image {
    width: 350px;
    object-fit: contain;
    cursor: pointer;
}

.product-image:hover {
    transform: scale(1.05);
    transition: transform 0.3s ease;
}

.contact {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 765px;
    background-color: #181A1B;
}

.contact-content {
    width: 1024px;
    padding: 100px 0;
    display: flex;
    flex-direction: column;
}

.contact-header {
    display: flex;
}

.contact-title {
    line-height: 60px;
    font-size: 60px;
    font-family: PingFang SC;
    font-weight: 600;
    color: #FFFFFF;
}

.contact-title-underline {
    height: 7px;
    width: calc(100% - 40px);
    background: #FFFFFF;
    margin: 24px 0 0 20px;
}

.contact-info {
    font-size: 40px;
    font-family: PingFang SC;
    font-weight: 600;
    color: #FFFFFF;
    margin-top: 70px;
}

.footer {
    border-top: 1px solid gray;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 160px;
    background-color: #181A1B;
}

.footer-content {
    display: flex;
    align-items: center;
    width: 822px;
    justify-content: space-between;
}

.footer-content-item {
    font-size: 16px;
    font-family: PingFang SC;
    font-weight: 400;
    color: #FFFFFF;
}