* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.header {
    background: #fff;
    box-shadow: 0px 1px 10px 1px rgba(0,0,0,0.1);
}
.header-container {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 0;
}

.logo-img {
  margin-right: 715px;
}

.logo-img .logo {
    height: 52px;
}

.menu .menu-item {
    list-style: none;
    display: flex;
    gap: 64px;
}

.menu .menu-item li a {
    text-decoration: none;
    color: #222;
    font-weight: bold;
    font-size: 14px;
}

.hamburger {
  display: none;
}

.hamburger img {
  width: 100%;
  cursor: pointer;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 45px;
    right: 0px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 16px;
    z-index: 999;
}

.mobile-menu ul {
    list-style: none;
}

.mobile-menu ul li {
    margin-bottom: 12px;
}

.mobile-menu ul li a {
    text-decoration: none;
    color: #222;
    font-size: 16px;
}

.banner-section {
  position: relative;
  width: 100%;
}

.banner-img {
  display: block;
}

.banner-btn {
  position: absolute;
  cursor: pointer;
}

.banner-btn.hidden-lg {
  top: 631px;
  left: 125px;
  width: auto;
}

.hidden-xs {
    display: none;
}

.hidden-lg {
    display: block;
}

.products-section {
    background: #F9F9F9;
    padding: 64px 0;
}

.products-section h2 {
    font-weight: bold;
    font-size: 40px;
    color: #222222;
    text-align: center;
    margin-bottom: 24px;
}

.products-section .products-desc {
    font-weight: 400;
    font-size: 18px;
    color: #222222;
    line-height: 24px;
    text-align: center;
    margin-bottom: 40px;
}

.products-section .product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(302px, 1fr));
    gap: 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.product-grid .product-card {
    padding: 48px 20px;
    text-align: center;
    background: #fff;
}

.product-card img {
    margin-bottom: 20px;
}

.product-card h3 {
    font-weight: bold;
    font-size: 20px;
    color: #222222;
    line-height: 30px;
    text-align: center;
    margin-bottom: 16px;
}

.product-card p {
    font-weight: 400;
    font-size: 18px;
    color: #555555;
    line-height: 28px;
}

.app-value {
    background: #F9F9F9;
    padding-bottom: 64px;
}

.app-value h2 {
    font-weight: bold;
    font-size: 40px;
    color: #222222;
    text-align: center;
    margin-bottom: 24px;
}

.app-value .value-desc {
    font-weight: 400;
    font-size: 18px;
    color: #222222;
    line-height: 24px;
    text-align: center;
    margin-bottom: 40px;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(620px, 1fr));
    gap: 40px;
    max-width: 1280px;
    margin: 0 auto;
}

.value-grid .value-item {
    padding: 42px;
    display: flex;
    align-items: flex-start;
    gap: 24px;
    background: #fff;
    box-shadow: 0px 4px 20px 1px rgba(0,0,0,0.04);
    max-width: 1280px;
    margin: 0 auto;
}

.value-item .value-text {
    padding-top: 5px;
}

.value-text h3 {
    font-weight: bold;
    font-size: 20px;
    color: #222222;
    text-align: left;
    line-height: 26px;
    margin-bottom: 20px;
}

.value-text p {
    font-weight: 400;
    font-size: 16px;
    color: #222222;
    line-height: 22.5px;
    text-align: left;
}

.customer-truth {
    background: #152D59;
    padding: 80px 0 64px;
}

.customer-truth h2 {
    font-weight: bold;
    font-size: 40px;
    color: #FFFFFF;
    text-align: center;
    margin-bottom: 32px;
}

.truth-desc {
    display: flex;
    justify-content: center;
    gap: 308px;
    margin-bottom: 40px;
    text-align: center;
}

.truth-content .number {
    font-weight: bold;
    font-size: 36px;
    color: #FFDC68;
    line-height: 40px;
    margin-bottom: 16px;
}

.truth-content p {
    font-weight: 400;
    font-size: 14px;
    color: #BECAE1;
    line-height: 40px;
}

.customer-comments {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    max-width: 1280px;
    margin: 0 auto;
}

.comment-item {
    background: #FFFFFF;
    border-radius: 12px;
    padding: 32px 40px;
    text-align: left;
}

.comment-item .star-img {
    margin-bottom: 24px;
}

.comment-item .comment-content {
    font-weight: 400;
    font-size: 16px;
    color: #555555;
    line-height: 28px;
    margin-bottom: 27px;
}

.comment-item .comment-author {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.author-text {
    padding-top: 1px;
}

.author-text h3 {
    font-weight: bold;
    font-size: 16px;
    color: #222222;
    line-height: 21px;
    margin-bottom: 6px;
}

.author-text p {
    font-weight: 400;
    font-size: 14px;
    color: #999999;
    line-height: 19px;
}

.security-section {
    padding: 64px 0;
    background: #F9F9F9;
}

.security-section h2 {
    font-weight: bold;
    font-size: 40px;
    color: #222222;
    margin-bottom: 40px;
    text-align: center;
}

.core-security {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(620px, 1fr));
    gap: 40px;
    max-width: 1280px;
    margin: 0 auto;
}

.security-card {
    padding: 42px;
    display: flex;
    align-items: flex-start;
    gap: 24px;
    background: #fff;
    box-shadow: 0px 4px 20px 1px rgba(0,0,0,0.04);
}

.security-text {
    padding-top: 5px;
}

.security-text h3 {
    font-weight: bold;
    font-size: 20px;
    color: #222222;
    text-align: left;
    line-height: 26px;
    margin-bottom: 20px;
}

.security-text p {
    font-weight: 400;
    font-size: 16px;
    color: #222222;
    line-height: 24px;
    text-align: left;
}

.download-section {
    padding: 64px 0;
    background: #152D59;
    text-align: center;
}

.download-section h2 {
    font-weight: bold;
    font-size: 40px;
    color: #FFFFFF;
    margin-bottom: 24px;
}

.download-section .download-desc {
    font-weight: 400;
    font-size: 18px;
    color: #FFFFFF;
    line-height: 24px;
    margin-bottom: 64px;
}

.download-section .download-buttons {
    display: flex;
    justify-content: center;
    gap: 40px;
}

.download-buttons img {
    cursor: pointer;
}

.footer {
  background: #051431;         
  color: #fff;             
  padding: 48px 0px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(209px, 1fr)); 
  gap: 130px;
  max-width: 1280px;
  margin: 0 auto;
}

.footer-item h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.footer-item h2 a {
  text-decoration: none;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  color: #D4DBE6;
  margin-bottom: 12px;
}

.footer-links a {
  color: #D4DBE6;
  text-decoration: none;
  font-size: 16px;
}

.footer-links a:hover {
  color: #fff;
}

.information {
    background-color: #FAFCFD;
    padding: 64px 320px 80px;
    line-height: 36px;
}

.information h2 {
    font-size: 40px;
    margin-bottom: 48px;
    font-weight: bold;
    text-align: center;
}

.information p {
    font-size: 18px;
    text-align: left;
}

.information .subtitle {
    font-size: 20px;
    font-weight: bold;
    text-align: left;
}

.ios-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 100);
    align-items: center;
    justify-content: center;
    z-index: 10000; 
}

.ios-overlay img {
    cursor: pointer;
}

@media (max-width: 768px) {
    /* 通用设置 */
    body {
        font-size: 14px;
    }

    .header-container {
        padding: 7px 16px;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .menu {
        display: none;
    }

    .hamburger {
        display: block;
    }

    .hamburger img {
        height: 21px;
    }

    .logo-img {
        margin-right: 0;
    }

    .logo-img .logo {
        height: 42px;
    }

    .menu .menu-item {
        flex-direction: column;
        gap: 12px;
    }

    .menu .menu-item li a {
        font-size: 14px;
    }

    .banner-btn.hidden-xs {
        top: 65%;
        left: 8px;
        width: auto;
    }

    /* banner 图切换：手机显示 mobile 图 */
    .hidden-xs {
        display: block !important;
    }
    .hidden-lg {
        display: none !important;
    }

    /* 产品部分 */
    .products-section {
        padding: 40px 20px;
    }

    .products-section h2 {
        font-size: 26px;
    }

    .products-section .products-desc {
        font-size: 14px;
        line-height: 20px;
    }

    .products-section .product-grid {
        grid-template-columns: 1fr; /* 一列 */
        gap: 16px;
    }

    .product-grid .product-card {
        padding: 24px 16px;
    }

    .product-card h3 {
        font-size: 18px;
    }

    .product-card p {
        font-size: 14px;
        line-height: 22px;
    }

    /* App 价值部分 */
    .app-value {
        padding: 40px 20px;
    }

    .app-value h2 {
        font-size: 26px;
    }

    .app-value .value-desc {
        font-size: 14px;
    }

    .value-grid {
        grid-template-columns: 1fr;
        gap: 20px!important;
    }

    .value-item {
        flex-direction: column;
        align-items: center!important;
        text-align: center;
        padding: 24px 16px!important;
    }

    .value-item img {
        width: 80px;
    }

    .value-text h3 {
        font-size: 18px;
        text-align: center;
    }

    .value-text p {
        font-size: 14px;
        text-align: center;
    }

    /* 客户评论 */
    .customer-truth {
        padding: 48px 16px;
    }

    .customer-truth h2 {
        font-size: 26px;
    }

    .truth-desc {
        flex-direction: column;
        gap: 16px;
        margin-bottom: 24px;
    }

    .truth-content .number {
        font-size: 28px;
    }

    .truth-content p {
        font-size: 13px;
    }

    .customer-comments {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .comment-item {
        padding: 24px 16px;
    }

    .comment-content {
        font-size: 14px;
    }

    /* 安全部分 */
    .security-section {
        padding: 40px 20px;
    }

    .security-section h2 {
        font-size: 26px;
    }

    .core-security {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .security-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 24px 16px;
    }

    .security-card img {
        width: 80px;
    }

    .security-text h3 {
        font-size: 18px;
        text-align: center;
    }

    .security-text p {
        font-size: 14px;
        text-align: center;
    }

    /* 下载部分 */
    .download-section {
        padding: 40px 20px;
    }

    .download-section h2 {
        font-size: 26px;
    }

    .download-section .download-desc {
        font-size: 14px;
        margin-bottom: 32px;
    }

    .download-section .download-buttons {
        flex-direction: column;
        gap: 16px;
    }

    .download-buttons img {
        width: 180px;
        margin: 0 auto;
    }

    /* 页脚 */
    .footer {
        padding: 40px 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-item h2 {
        font-size: 18px;
    }

    .footer-links li,
    .footer-links a {
        font-size: 14px;
    }

    .information {
        padding: 40px 16px;
        line-height: 1.8;
    }

    .information h2 {
        font-size: 30px;
        margin-bottom: 24px;
    }

    .information p {
        font-size: 15px;
    }

    .information .subtitle {
        font-size: 18px;
    }
    
    .ios-overlay img { width: 100%; }
}