@media screen and (max-width:768px) {
  .head1 .menu {
    position: fixed;
    left: 0;
    top: -120vh;
    width: 100%;
    height: calc(100vh - var(--head));
    background: #fff;
    display: block;
    opacity: 0;
    overflow: auto;
    transition: all ease .3s;
    z-index: 50;
    color: #333;
  }

  header.open .menu {
    top: var(--head);
    opacity: 1;
  }

  .head1 .link {
    width: 100%;
    margin-left: 0;
  }

  .head1 .link>a {
    display: block;
    border-bottom: 1px solid #ddd;
    line-height: 50px;
    color: #333;
  }

  .head1 .link a {
    padding: 0 20px;
  }

  .head1 .link::after {
    display: none;
    width: 52px;
    height: 10px;
    left: 50%;
    top: 100%;
    margin-top: 14px;
    transform: translate(-50%, -50%) scale(0);
  }

  .head1 .link:hover::after,
  .head1 .link.on::after {
    transform: translate(-50%, 0) scale(1);
  }

  .head1 .down {
    min-width: 80px;
    overflow: hidden;
    padding: 0;
  }

  .head1 .link .down {
    left: 50%;
    top: 100%;
    margin-top: 0;
    transform: translate(0, 0);
    min-width: 160px;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
    position: static;
    opacity: 1;
    width: 100%;
    pointer-events: visible;
    border-bottom: 1px solid #ddd;
    display: none;
  }

  .head1 .link .down::before {
    width: 100%;
    height: 40px;
    bottom: 100%;
  }

  .head1 .link .down a {
    padding: 10px 30px;
    text-align: left;
    font-size: 14px;
    color: #666;
  }

  .head1 .link .down a:not(:last-child) {
    border-bottom: none;
  }

  .head1 .link .down-jt {
    width: 50px;
    height: 50px;
    position: absolute;
    right: 0;
    top: 0;
    background: url('/img/icon-jia.svg') no-repeat center/15px;
  }


  .head1 .link.on .down-jt {
    background: url('/img/icon-jian.svg') no-repeat center/15px;
  }

  body {
    overflow-x: hidden;
  }

  .page-shell {
    min-height: auto;
    height: auto !important;
    overflow: hidden;
  }

  .page {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    transform: none !important;
    transform-origin: top left;
  }

  .section-hero,
  .section-overview,
  .section-products,
  .section-architecture,
  .section-applications,
  .section-news,
  .section-footer {
    width: 100%;
    height: auto;
  }

  .section-hero {
    min-height: 820px;
    padding-bottom: 60px;
  }

  .hero-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    min-height: 76px;
    background: rgba(6, 10, 20, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: visible;
    z-index: 1200;
  }

  .hero-nav:hover {
    height: auto;
  }

  .hero-nav-center {
    display: flex;
    width: 100%;
    padding: 16px 16px 14px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px 0;
    box-sizing: border-box;
  }

  .hero-logo {
    order: 1;
    width: 120px;
    height: 44px;
    flex: 0 0 auto;
  }

  .hero-logo img {
    width: 120px;
    height: auto;
  }

  .hero-global-wrap {
    order: 2;
    display: flex;
    flex-direction: row;
    justify-content: flex-end;
    width: auto;
    height: 44px;
    flex: 0 0 auto;
    margin-left: auto;
    position: relative;
    align-items: center;
  }

  .hero-global {
    width: 44px;
    height: 44px;
    padding: 0;
    justify-content: center;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
  }

  .hero-global img {
    width: 20px;
    height: 20px;
  }

  .hero-menu-toggle {
    order: 3;
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    flex-shrink: 0;
    margin-left: 12px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
  }

  .hero-menu-toggle.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .hero-menu-toggle.is-active span:nth-child(2) {
    opacity: 0;
  }

  .hero-menu-toggle.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero-menu {
    order: 4;
    flex: 0 0 100%;
    width: 100%;
    display: none;
    flex-direction: column;
    gap: 0;
    align-items: stretch;
    margin-top: 6px;
    padding: 10px 0;
    border-radius: 16px;
    background: rgba(10, 16, 28, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .hero-nav.is-mobile-open .hero-menu {
    display: flex;
  }

  .hero-menu::-webkit-scrollbar {
    width: 0;
    height: 0;
    display: none;
  }

  .hero-menu-group,
  .hero-menu-group--products,
  .hero-menu-group--contact,
  .hero-menu-group--simple {
    width: 100%;
    height: auto;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .hero-menu-group:last-child {
    border-bottom: none;
  }

  .hero-menu-item {
    width: 100%;
    min-height: 56px;
    padding: 0 6px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    box-sizing: border-box;
  }

  .hero-menu-item::before {
    display: none;
  }

  .hero-menu-item-label {
    display: flex;
    align-items: center;
    width: auto;
    flex: 1 1 auto;
    justify-content: flex-start;
    padding: 16px 14px;
    box-sizing: border-box;
  }

  .hero-menu-item:hover {
    background: none;
    color: #ffffff;
    -webkit-text-fill-color: #ffffff;
  }

  .hero-menu-item-arrow {
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    margin-left: 0;
    margin-right: 4px;
  }

  .hero-submenu,
  .hero-submenu--products,
  .hero-submenu--contact,
  .hero-submenu--lang {
    position: static;
    display: none;
    opacity: 1;
    pointer-events: auto;
    transform: none;
    min-width: 100%;
    gap: 0;
  }

  .hero-menu-group.is-open-mobile .hero-submenu--products,
  .hero-menu-group.is-open-mobile .hero-submenu--contact {
    display: flex;
    flex-direction: column;
    width: calc(100% - 24px);
    align-self: center;
    margin: 0 12px 10px;
    padding: 6px 0;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
    box-sizing: border-box;
  }

  .hero-global-wrap .hero-submenu--lang {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 88px;
    border-radius: 12px;
    background: rgba(10, 16, 28, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.22);
    overflow: hidden;
    z-index: 1201;
  }

  .hero-global-wrap.is-open-mobile .hero-submenu--lang {
    display: flex;
  }

  .hero-submenu-link {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    width: 100%;
    min-height: 44px;
    padding: 10px 18px;
    text-align: left;
    white-space: normal;
    box-sizing: border-box;
  }

  .hero-menu-group.is-open-mobile .hero-submenu--products .hero-submenu-link,
  .hero-menu-group.is-open-mobile .hero-submenu--contact .hero-submenu-link {
    padding: 12px 18px 12px 20px;
    line-height: 1.5;
  }

  .hero-submenu-link::after {
    display: none;
  }

  .hero-submenu-link:hover {
    background: none;
    color: #ffffff;
    -webkit-text-fill-color: #ffffff;
  }

  .hero-menu-group.is-open-mobile .hero-menu-item-arrow::before {
    transform: translate(-50%, -32%) rotate(225deg);
  }

  .hero-content {
    width: calc(100% - 40px);
    max-width: calc(100% - 40px);
    height: auto;
    margin: 132px 20px 0;
    filter: none;
  }

  .hero-content-item,
  .hero-content-item.active {
    position: static;
    display: block;
  }

  .hero-content-item:not(.active) {
    display: none;
  }

  .hero-title,
  .hero-title--slide2,
  .hero-desc {
    width: 100%;
    max-width: 100%;
    height: auto;
  }

  .hero-title {
    margin-top: 0;
    line-height: 1.15;
    letter-spacing: 0;
  }

  .hero-desc {
    margin-top: 24px;
  }

  .hero-cta {
    margin-top: 32px;
  }

  .hero-slider {
    position: static;
    transform: none;
    width: calc(100% - 40px);
    margin: 40px 20px 0;
    padding: 0;
  }

  .hero-slider-line {
    width: 120px;
  }

  .overview-inner,
  .architecture-inner,
  .applications-inner,
  .news-inner,
  .footer-inner {
    width: 100%;
    max-width: 100%;
    padding: 0 20px;
  }

  .section-overview,
  .section-products,
  .section-architecture,
  .section-applications,
  .section-news {
    padding: 60px 0;
  }

  .section-architecture,
  .section-applications {
    position: relative;
    overflow: visible;
  }

  .overview-inner,
  .architecture-content,
  .footer-top {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .overview-inner {
    height: auto !important;
    align-content: flex-start;
  }

  .overview-left,
  .overview-text,
  .architecture-header,
  .architecture-content,
  .architecture-main,
  .architecture-main-card,
  .architecture-main .architecture-desc,
  .architecture-side,
  .architecture-side-top,
  .architecture-side .architecture-side-text,
  .applications-inner > .applications-title,
  .applications-inner > .applications-subtitle,
  .news-top,
  .news-content,
  .news-slide,
  .news-image-wrap,
  .footer-head,
  .footer-brand-col,
  .footer-products-col,
  .footer-explore-col,
  .footer-contact-col {
    width: 100%;
    max-width: 100%;
  }

  .overview-left,
  .architecture-header,
  .architecture-main,
  .architecture-side,
  .footer-contact-col {
    height: auto;
  }

  .architecture-inner,
  .architecture-content,
  .applications-inner,
  .applications-grid {
    height: auto !important;
  }

  .overview-metrics {
    width: 100%;
    height: auto;
    grid-template-columns: 1fr;
    grid-template-rows: none;
    gap: 20px;
  }

  .overview-metric,
  .overview-metric-inner {
    width: 100%;
    height: auto;
    min-height: auto;
  }

  .overview-metric-inner {
    padding-left: 20px;
  }

  .products-grid {
    width: 100%;
    height: auto;
    padding: 0 20px;
    flex-direction: column;
    gap: 16px;
  }

  .product-card,
  .products-grid:has(.product-card:hover) .product-card,
  .products-grid:has(.product-card:hover) .product-card:hover {
    flex: none;
    width: 100%;
    height: auto;
    flex-basis: auto;
  }

  .product-image-wrap {
    height: 320px;
  }

  .product-bottom {
    position: static;
    padding: 20px;
    background: #eef2f7;
  }

  .architecture-header {
    margin-top: 0;
  }

  .architecture-content {
    margin-top: 32px;
    gap: 20px;
  }

  .architecture-main-card {
    height: 240px;
  }

  .architecture-main .architecture-desc {
    margin-top: 16px;
  }

  .architecture-play {
    padding: 16px;
  }

  .architecture-side-top {
    height: 260px;
  }

  .architecture-side .architecture-side-text {
    position: absolute;
    left: 0;
    bottom: 0;
    padding: 20px;
  }

  .architecture-list {
    margin-top: 16px;
  }

  .architecture-side {
    margin-bottom: 8px;
  }

  .architecture-item {
    min-height: 44px;
    padding: 10px 0;
  }

  .section-applications {
    padding-top: 40px;
  }

  .applications-inner {
    gap: 0;
  }

  .applications-inner .applications-subtitle {
    margin-top: 16px;
    white-space: normal;
  }

  .applications-grid {
    width: 100%;
    margin-top: 24px;
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .application-card {
    width: 100%;
    height: 320px;
  }

  .application-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
  }

  .news-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .news-carousel {
    width: 100%;
    margin: 40px 0 0;
    overflow: visible;
  }

  .news-track {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
  }

  .news-slide {
    margin-left: 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .news-image-wrap {
    height: 240px;
  }

  .news-content {
    min-height: auto;
    padding-right: 0;
    gap: 16px;
  }

  .news-controls {
    position: static;
    margin-top: 24px;
    padding: 0;
  }

  .footer-head {
    height: auto;
    padding-top: 20px;
  }

  .footer-head-icon {
    position: static;
    width: 56px;
    height: 56px;
    margin-left: auto;
  }

  .footer-top {
    margin-top: 24px;
    min-height: auto;
  }

  .footer-explore-col,
  .footer-contact-col {
    margin-left: 0;
  }

  .footer-social {
    margin-top: 16px;
  }

  .footer-touch {
    margin-top: 20px;
  }

  .footer-bottom {
    margin-top: 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .footer-logo {
    width: 180px;
  }

  .footer-float {
    width: 48px;
    height: 48px;
  }

  .footer-float--corner {
    right: 16px;
    bottom: 16px;
  }

  /* Quantex US 首页手机端细化，避免模块重叠和桌面字号过大 */
  .section-hero {
    min-height: auto;
    padding-bottom: 40px;
  }

  .hero-title {
    font-size: 42px;
  }

  .hero-content-item[data-slide-content="1"].active {
    gap: 24px;
    padding-bottom: 0;
  }

  .hero-content-item[data-slide-content="2"].active {
    gap: 24px;
    padding-bottom: 0;
  }

  .hero-content-item[data-slide-content="1"] .hero-title {
    width: 100%;
    max-width: 100%;
    font-size: 42px;
    line-height: 1.15;
  }

  .hero-title--slide2 {
    font-size: 32px;
    margin-top: 0;
    width: 100%;
    max-width: 100%;
  }

  .hero-content-item[data-slide-content="2"] .hero-title--slide2 {
    font-size: 32px;
    margin-top: 0;
    width: 100%;
    max-width: 100%;
    line-height: 1.1;
  }

  .hero-desc {
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-content-item[data-slide-content="1"] .hero-desc {
    width: 100%;
    max-width: 100%;
    font-size: 16px;
    line-height: 1.7;
  }

  .hero-cta {
    width: auto;
    height: 48px;
  }

  .hero-content-item[data-slide-content="2"] .hero-cta {
    margin-top: 0;
  }

  .hero-cta-text {
    width: auto;
    padding: 0 24px;
  }

  .hero-cta-arrow {
    width: 48px;
    height: 48px;
  }

  .overview-text {
    font-size: 16px;
  }

  .overview-action {
    width: auto;
    height: 48px;
    gap: 4px;
  }

  .overview-action-text {
    min-width: 0;
    width: auto;
    height: 48px;
    padding: 0 24px;
    white-space: nowrap;
  }

  .overview-action-arrow {
    width: 48px;
    height: 48px;
  }

  .overview-metric-value {
    font-size: 40px;
  }

  .overview-metric-label {
    max-width: 100%;
    font-size: 14px;
  }

  .product-image-wrap {
    height: 240px;
  }

  .product-title {
    font-size: 28px;
  }

  .product-subtitle {
    margin-top: 8px;
    font-size: 14px;
  }

  .product-arrow {
    width: 48px;
    height: 48px;
  }

  .architecture-header .architecture-title {
    font-size: 34px;
  }

  .architecture-header .architecture-subtitle {
    margin-top: 16px;
    font-size: 15px;
    line-height: 1.7;
    white-space: normal;
  }

  .architecture-main-card {
    height: 220px;
  }

  .architecture-play {
    gap: 8px;
    padding: 14px 16px;
  }

  .architecture-side-top {
    height: 220px;
  }

  .architecture-side .architecture-side-text {
    min-height: auto;
    font-size: 14px;
    line-height: 1.7;
  }

  .architecture-item .architecture-item-index,
  .architecture-item .architecture-item-text {
    font-size: 16px;
  }

  .applications-inner .applications-title {
    font-size: 34px;
  }

  .applications-inner .applications-subtitle {
    font-size: 15px;
    line-height: 1.7;
  }

  .application-card {
    height: 240px;
  }

  .application-label {
    min-height: 60px;
    padding: 18px 18px 10px;
    font-size: 16px;
  }

  .news-top .news-title {
    font-size: 34px;
  }

  .news-view-all {
    height: 48px;
  }

  .news-view-text {
    width: auto;
    height: 48px;
    padding: 0 24px;
  }

  .news-view-arrow {
    width: 48px;
    height: 48px;
  }

  .news-track {
    padding-right: 0;
  }

  .news-slide {
    padding: 0;
  }

  .news-headline {
    font-size: 24px;
    line-height: 1.45;
  }

  .news-summary {
    font-size: 14px;
    line-height: 1.7;
  }

  .news-read-more {
    height: 40px;
  }

  .news-controls {
    flex-wrap: wrap;
    justify-content: space-between;
    width: 100%;
    gap: 12px;
  }

  .news-control {
    padding: 0;
    font-size: 14px;
  }

  .news-counter {
    min-width: auto;
    margin-left: auto;
  }

  .footer-company-name {
    font-size: 30px;
    line-height: 1.25;
  }

  .footer-company-sub,
  .footer-col-title,
  .footer-contact-address,
  .footer-contact-label,
  .footer-contact-value {
    font-size: 14px;
  }

  .footer-contact-address {
    line-height: 1.7;
  }

  .footer-touch {
    width: auto;
    height: 48px;
  }

  .footer-touch-text {
    width: auto;
    height: 48px;
    padding: 0 24px;
  }

  .footer-touch-arrow {
    width: 48px;
    height: 48px;
  }
}