/* ============================================
   响应式样式
   ============================================ */

/* 平板设备 */
@media (max-width: 992px) {
    .hero-title {
        font-size: 64px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .about-content {
        grid-template-columns: 1fr !important;
        gap: 40px !important;
        padding: 0 20px !important;
    }
    
    .about-image {
        order: -1;
    }
    
    .about-image img {
        max-height: 300px;
        object-fit: cover;
    }
    
    .about-text {
        padding: 0 !important;
    }
    
    .about-text h2 {
        font-size: 24px !important;
        text-align: center !important;
    }
    
    .about-text p {
        font-size: 16px !important;
        line-height: 1.7 !important;
        text-align: left !important;
    }
    
    /* 两栏布局响应式 */
    .two-column-grid {
        grid-template-columns: 1fr !important;
        gap: 40px !important;
    }
    
    /* 三栏布局响应式 */
    .three-column-grid {
        grid-template-columns: 1fr !important;
        gap: 40px !important;
    }
    
    /* 价值观内容响应式 */
    .values-content {
        grid-template-columns: 1fr !important;
        gap: 40px !important;
    }
    
    .values-video {
        order: -1;
    }
    
    /* APP下载弹窗响应式 */
    .modal {
        padding: 10px !important;
    }
    
    .modal-content {
        max-width: 95% !important;
        max-height: 90vh !important;
        padding: 20px 15px !important;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch !important;
    }
    
    .modal-content h3 {
        font-size: 22px !important;
        margin-bottom: 20px !important;
    }
    
    .apps-grid {
        gap: 12px !important;
        margin-bottom: 20px !important;
    }
    
    .app-card {
        padding: 18px !important;
        gap: 18px !important;
        border-radius: 14px !important;
    }
    
    .app-icon {
        width: 64px !important;
        height: 64px !important;
        min-width: 64px !important;
        border-radius: 16px !important;
    }
    
    .app-card-content {
        flex-direction: column !important;
        align-items: flex-start !important;
        justify-content: space-between !important;
        height: 64px !important;
        padding: 2px 0 !important;
    }
    
    .app-name {
        font-size: 19px !important;
        margin: 0 !important;
        text-align: left !important;
        font-weight: 700 !important;
        line-height: 1.2 !important;
        position: absolute !important;
        top: 50% !important;
        transform: translateY(-50%) !important;
    }
    
    .app-download-btn {
        padding: 9px 22px !important;
        font-size: 13px !important;
        align-self: flex-end !important;
        border-radius: 8px !important;
        margin-top: auto !important;
    }
    
    .qr-section {
        padding-top: 16px !important;
        margin-top: 16px !important;
    }
    
    .qr-section p {
        font-size: 13px !important;
        margin-bottom: 12px !important;
    }
    
    .qr-section img {
        max-width: 150px !important;
    }
    
    .modal-content .btn-outline {
        margin-top: 20px !important;
        padding: 10px !important;
        font-size: 14px !important;
    }
    
    /* Footer APP Logo响应式 */
    .footer-content {
        grid-template-columns: 1fr !important;
        gap: 40px !important;
    }
    
    .footer-section {
        width: 100% !important;
        max-width: 100% !important;
    }
    
    .footer-apps-section {
        padding-right: 0 !important;
    }
    
    .footer-apps-grid {
        grid-template-columns: 1fr !important;
        gap: 15px !important;
    }
    
    .footer-app-logo {
        flex-direction: row !important;
        padding: 12px 16px !important;
        justify-content: flex-start !important;
    }
    
    .footer-app-logo img {
        height: 40px !important;
        margin-bottom: 0 !important;
        margin-right: 12px !important;
    }
    
    .app-name-footer {
        font-size: 14px !important;
        text-align: left !important;
    }
    
    /* 横向时间线响应式 */
    .timeline-item-horizontal {
        min-width: 280px !important;
        padding: 0 20px !important;
    }
    
    .timeline-item-horizontal:first-child {
        padding-left: 30px !important;
    }
    
    .timeline-item-horizontal:last-child {
        padding-right: 30px !important;
    }
    
    .timeline-year-badge {
        font-size: 26px !important;
        padding: 10px 20px !important;
    }
    
    .timeline-year-badge {
        font-size: 24px !important;
        font-weight: 700 !important;
        padding: 10px 18px !important;
        margin-bottom: 14px !important;
    }
    
    .timeline-content-horizontal {
        padding: 24px 20px !important;
        max-width: 100% !important;
    }
    
    .timeline-content-horizontal h3 {
        font-size: 18px !important;
        font-weight: 600 !important;
        line-height: 1.4 !important;
        margin-bottom: 10px !important;
    }
    
    .timeline-content-horizontal p {
        font-size: 14px !important;
        font-weight: 400 !important;
        line-height: 1.6 !important;
    }
    
    .timeline-item-horizontal::after {
        right: -10px !important;
        width: 20px !important;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

/* 移动设备 */
@media (max-width: 768px) {
    .nav-container {
        padding: 15px 20px;
    }
    
    .logo {
        height: 35px;
    }
    
    .nav-menu {
        position: fixed;
        top: 73px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 73px);
        background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.95) 100%);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 30px 20px;
        transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
        border-top: 1px solid rgba(219, 58, 53, 0.1);
        gap: 5px;
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu li a {
        padding: 15px 20px;
        border-radius: 10px;
        font-size: 16px;
        width: 100%;
        display: block;
    }
    
    .nav-menu li a:hover {
        transform: translateX(5px);
    }
    
    .desktop-lang-switcher {
        display: none !important;
    }
    
    .mobile-lang-switcher {
        display: block !important;
        border-top: 1px solid rgba(0, 0, 0, 0.08);
        padding-top: 15px;
        margin-top: 15px;
    }
    
    .language-switcher-mobile {
        display: flex;
        gap: 10px;
        justify-content: center;
    }
    
    .language-switcher-mobile .lang-btn {
        padding: 8px 20px;
        font-size: 14px;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
        background-color: var(--brand-color);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
        background-color: var(--brand-color);
    }
    
    .hero {
        min-height: 500px;
        margin-top: 70px;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .section {
        padding: 60px 0;
        overflow-x: hidden;
    }
    
    .container {
        padding-left: 20px !important;
        padding-right: 20px !important;
        box-sizing: border-box;
    }
    
    .section-title {
        font-size: 24px;
        text-align: left !important;
    }
    
    /* 统一所有section标题样式 */
    .section h2,
    .section h3,
    .about-text h2,
    .about-text h3,
    .values-text h3 {
        text-align: left !important;
        font-size: 24px !important;
    }
    
    .about-text h2 {
        font-size: 24px !important;
    }
    
    .about-text h3 {
        font-size: 22px !important;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    /* About Umall 区域移动端适配 */
    .about {
        padding: 60px 0 !important;
    }
    
    .about .container {
        padding: 0 20px !important;
    }
    
    .about-content {
        grid-template-columns: 1fr !important;
        gap: 30px !important;
        padding: 0 !important;
        max-width: 100% !important;
        margin: 0 !important;
    }
    
    .about-image {
        order: -1;
        width: 100%;
        padding: 0;
    }
    
    .about-image img {
        max-height: 250px;
        object-fit: cover;
        border-radius: 8px !important;
        width: 100%;
    }
    
    .about-text {
        padding: 0 !important;
        width: 100%;
    }
    
    .about-text h2 {
        font-size: 24px !important;
        text-align: left !important;
        margin-bottom: 20px !important;
        padding: 0 !important;
    }
    
    .about-text p {
        font-size: 15px !important;
        line-height: 1.7 !important;
        text-align: left !important;
        margin-bottom: 20px !important;
        padding: 0 !important;
        word-wrap: break-word;
    }
    
    .about-text > div {
        padding-top: 20px !important;
        padding-left: 0 !important;
        padding-right: 0 !important;
    }
    
    .about-text h3 {
        font-size: 20px !important;
        margin-bottom: 12px !important;
        padding: 0 !important;
    }
    
    /* 我们的发展历程移动端适配 */
    .journey-section {
        padding: 60px 0 !important;
        overflow-x: hidden !important;
    }
    
    .journey-section .container {
        padding: 0 20px !important;
        max-width: 100% !important;
        margin: 0 !important;
    }
    
    .journey-section .section-title {
        padding: 0 !important;
        font-size: 24px !important;
        margin-bottom: 30px !important;
        text-align: left !important;
        width: 100%;
        box-sizing: border-box;
    }
    
    .timeline-horizontal-wrapper {
        padding: 20px 0 30px !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        width: 100%;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding-left: 20px !important;
        padding-right: 20px !important;
        scroll-snap-type: x mandatory;
        display: block !important;
    }
    
    .timeline-horizontal {
        padding: 0 !important;
        gap: 0 !important;
        margin: 0 !important;
        justify-content: flex-start !important;
    }
    
    .timeline-item-horizontal {
        min-width: 260px !important;
        padding: 0 15px !important;
        box-sizing: border-box;
        scroll-snap-align: start;
    }
    
    .timeline-item-horizontal:first-child {
        padding-left: 20px !important;
        scroll-snap-align: start;
    }
    
    .timeline-item-horizontal:last-child {
        padding-right: 20px !important;
    }
    
    .timeline-year-badge {
        font-size: 22px !important;
        padding: 8px 16px !important;
        margin-bottom: 12px !important;
        box-sizing: border-box;
    }
    
    .timeline-content-horizontal {
        padding: 18px 16px !important;
        max-width: 100% !important;
        box-sizing: border-box;
        word-wrap: break-word;
    }
    
    .timeline-content-horizontal h3 {
        font-size: 16px !important;
        font-weight: 600 !important;
        margin-bottom: 8px !important;
        word-wrap: break-word;
        line-height: 1.4 !important;
    }
    
    .timeline-content-horizontal p {
        font-size: 13px !important;
        line-height: 1.6 !important;
        word-wrap: break-word;
        overflow-wrap: break-word;
        font-weight: 400 !important;
    }
    
    .timeline-year-badge {
        font-size: 22px !important;
        font-weight: 700 !important;
        padding: 8px 16px !important;
        margin-bottom: 12px !important;
    }
    
    .timeline-item-horizontal::after {
        right: -8px !important;
        width: 16px !important;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .policy-page {
        padding: 100px 15px 60px;
    }
    
    .policy-page h1 {
        font-size: 32px;
    }
    
    .policy-page h2 {
        font-size: 24px;
    }
    
    .policy-page h3 {
        font-size: 20px;
    }
}

/* 小屏移动设备 */
@media (max-width: 480px) {
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    /* 小屏下载弹窗进一步优化 */
    .modal-content {
        max-height: 85vh !important;
        padding: 15px 12px !important;
    }
    
    .modal-content h3 {
        font-size: 20px !important;
        margin-bottom: 15px !important;
    }
    
    .apps-grid {
        gap: 10px !important;
        margin-bottom: 15px !important;
    }
    
    .app-card {
        padding: 16px !important;
        gap: 16px !important;
        border-radius: 12px !important;
    }
    
    .app-icon {
        width: 56px !important;
        height: 56px !important;
        min-width: 56px !important;
        border-radius: 14px !important;
    }
    
    .app-card-content {
        flex-direction: column !important;
        align-items: flex-start !important;
        justify-content: space-between !important;
        height: 56px !important;
        padding: 2px 0 !important;
    }
    
    .app-name {
        font-size: 17px !important;
        margin: 0 !important;
        text-align: left !important;
        font-weight: 700 !important;
        line-height: 1.2 !important;
        position: absolute !important;
        top: 50% !important;
        transform: translateY(-50%) !important;
    }
    
    .app-download-btn {
        padding: 8px 18px !important;
        font-size: 12px !important;
        align-self: flex-end !important;
        border-radius: 8px !important;
        margin-top: auto !important;
    }
    
    /* About Umall 区域小屏适配 */
    .about {
        padding: 50px 0 !important;
    }
    
    .about .container {
        padding: 0 15px !important;
    }
    
    .about-content {
        padding: 0 !important;
        gap: 25px !important;
        margin: 0 !important;
    }
    
    .about-image {
        width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    
    .about-image img {
        max-height: 200px !important;
        width: 100% !important;
    }
    
    .about-text {
        width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    
    .about-text h2 {
        font-size: 24px !important;
        text-align: left !important;
        padding: 0 !important;
    }
    
    .about-text h3 {
        font-size: 22px !important;
        text-align: left !important;
    }
    
    .about-text p {
        font-size: 14px !important;
        line-height: 1.6 !important;
        padding: 0 !important;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    .about-text h3 {
        font-size: 18px !important;
        padding: 0 !important;
    }
    
    /* 我们的发展历程小屏适配 */
    .journey-section {
        padding: 50px 0 !important;
        overflow-x: hidden !important;
    }
    
    .journey-section .container {
        padding: 0 15px !important;
    }
    
    .journey-section .section-title {
        font-size: 24px !important;
        padding: 0 !important;
        margin-bottom: 25px !important;
        text-align: left !important;
        width: 100%;
    }
    
    .timeline-horizontal-wrapper {
        padding: 15px 0 25px !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
    }
    
    .timeline-item-horizontal {
        min-width: 240px !important;
        padding: 0 12px !important;
        box-sizing: border-box;
    }
    
    .timeline-item-horizontal:first-child {
        padding-left: 15px !important;
    }
    
    .timeline-item-horizontal:last-child {
        padding-right: 15px !important;
    }
    
    .timeline-year-badge {
        font-size: 20px !important;
        font-weight: 700 !important;
        padding: 6px 14px !important;
        box-sizing: border-box;
    }
    
    .timeline-content-horizontal {
        padding: 16px 14px !important;
        box-sizing: border-box;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    .timeline-content-horizontal h3 {
        font-size: 15px !important;
        font-weight: 600 !important;
        word-wrap: break-word;
        line-height: 1.4 !important;
        margin-bottom: 6px !important;
    }
    
    .timeline-content-horizontal p {
        font-size: 12px !important;
        line-height: 1.5 !important;
        word-wrap: break-word;
        overflow-wrap: break-word;
        font-weight: 400 !important;
    }
    
    .nav-container {
        padding: 12px 15px;
    }
    
    .logo {
        height: 32px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .modal-content {
        padding: 30px 20px;
    }
}