/* ===== 全局重置 ===== */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Inter', sans-serif;
        background: #f8faff;
        color: #1a1a2e;
        overflow-x: hidden;
        scroll-behavior: smooth;
    }

    a {
        text-decoration: none;
        color: inherit;
    }

    ul {
        list-style: none;
    }

    .container {
        max-width: 1280px;
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== 滚动条 ===== */
    ::-webkit-scrollbar {
        width: 8px;
    }
    ::-webkit-scrollbar-track {
        background: #eef2f7;
    }
    ::-webkit-scrollbar-thumb {
        background: #3b82f6;
        border-radius: 10px;
    }

    /* ===== 预加载 ===== */
    #preloader {
        position: fixed;
        inset: 0;
        z-index: 9999;
        background: #f8faff;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: opacity 0.8s ease, visibility 0.8s ease;
    }
    #preloader.hide {
        opacity: 0;
        visibility: hidden;
    }
    .spinner {
        width: 60px;
        height: 60px;
        border-radius: 50%;
        border: 4px solid rgba(59, 130, 246, 0.15);
        border-top-color: #3b82f6;
        animation: spin 0.9s linear infinite;
    }
    @keyframes spin {
        to {
            transform: rotate(360deg);
        }
    }

    /* ===== 返回顶部 ===== */
    #backTop {
        position: fixed;
        bottom: 40px;
        right: 40px;
        z-index: 999;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: linear-gradient(135deg, #3b82f6, #2563eb);
        border: none;
        color: #fff;
        font-size: 22px;
        cursor: pointer;
        box-shadow: 0 8px 30px rgba(59, 130, 246, 0.35);
        opacity: 0;
        visibility: hidden;
        transform: translateY(20px) scale(0.8);
        transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
        display: flex;
        align-items: center;
        justify-content: center;
    }
    #backTop.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0) scale(1);
    }
    #backTop:hover {
        transform: translateY(-4px) scale(1.05);
        box-shadow: 0 12px 40px rgba(59, 130, 246, 0.5);
    }

    /* ============================================================
               HEADER  —  透明 · 滚动后白底
               ============================================================ */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
        height: 100px;
        display: flex;
        align-items: center;
        background: transparent;
        backdrop-filter: none;
        border-bottom: none;
        box-shadow: none;
        transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
    }
    .header.scrolled {
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(18px) saturate(1.4);
        border-bottom: 1px solid rgba(0, 0, 0, 0.04);
        box-shadow: 0 2px 24px rgba(37, 99, 235, 0.3);
    }
    .header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        height: 100%;
    }

    .logo img {
        height: 28px;
        display: block;
        filter: none;
    }

    /* ===== 导航 居中 · 字体18px 加粗 · 始终黑色 ===== */
    .nav-desktop {
        display: flex;
        align-items: center;
        gap: 6px;
        height: 100%;
        flex: 1;
        justify-content: center;
    }
    .nav-desktop>ul {
        display: flex;
        align-items: center;
        gap: 8px;
        height: 100%;
    }
    .nav-desktop>ul>li {
        position: relative;
        height: 100%;
        display: flex;
        align-items: center;
    }
    .nav-desktop>ul>li>a {
        padding: 10px 20px;
        font-weight: 700;
        font-size: 18px;
        color: #1a1a2e;
        /* 始终黑色，无阴影 */
        text-shadow: none;
        border-radius: 10px;
        transition: all 0.25s;
        display: flex;
        align-items: center;
        letter-spacing: 0.3px;
        white-space: nowrap;
    }
    /* 透明状态下也保持黑色 */
    .header:not(.scrolled) .nav-desktop>ul>li>a {
        color: #1a1a2e;
        text-shadow: none;
    }
    .header.scrolled .nav-desktop>ul>li>a {
        color: #1a1a2e;
        text-shadow: none;
    }
    .nav-desktop>ul>li>a:hover,
    .nav-desktop>ul>li>a.active {
        background: rgba(59, 130, 246, 0.12);
    }
    .header:not(.scrolled) .nav-desktop>ul>li>a:hover,
    .header:not(.scrolled) .nav-desktop>ul>li>a.active {
        background: rgba(59, 130, 246, 0.12);
    }

    /* ===== 二级菜单 — 靠近 + 延迟消失 ===== */
    .nav-desktop .dropdown-menu {
        position: absolute;
        top: calc(80% + 2px);
        left: 50%;
        transform: translateX(-50%) translateY(4px);
        min-width: 160px;
        background: #ffffff;
        backdrop-filter: blur(20px);
        border: 1px solid rgba(0, 0, 0, 0.06);
        border-radius: 16px;
        padding: 10px 0;
        box-shadow: 0 24px 60px rgba(0, 0, 0, 0.08);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
        transition-delay: 0.2s;
    }
    .nav-desktop .dropdown:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateX(-50%) translateY(0);
        transition-delay: 0s;
    }
    .nav-desktop .dropdown-menu li a {
        display: block;
        padding: 10px 24px;
        font-size: 15px;
        font-weight: 800;
        color: #4a5568;
        transition: all 0.2s;
        border-radius: 8px;
        margin: 0 6px;
    }
    .nav-desktop .dropdown-menu li a:hover {
        color: #1a1a2e;
        background: rgba(59, 130, 246, 0.08);
    }

    /* ===== 语言切换 — 浅蓝底色 + 大圆角 ===== */
    .lang-toggle {
        display: flex;
        align-items: center;
        gap: 8px;
        white-space: nowrap;
        margin-left: 12px;
        padding: 8px 18px 8px 16px;
        border-radius: 40px;
        /* 大圆角 */
        background: #e8f0fe;
        /* 浅蓝底色 */
        border: 1px solid rgba(59, 130, 246, 0.15);
        cursor: pointer;
        font-size: 14px;
        font-weight: 500;
        color: #1a1a2e;
        transition: all 0.25s;
        position: relative;
        height: 38px;
        flex-shrink: 0;
    }
    .lang-toggle i {
        font-size: 16px;
        color: #3b82f6;
    }
    /* 透明状态下也保持浅蓝底色 */
    .header:not(.scrolled) .lang-toggle {
        background: #e8f0fe;
        border-color: rgba(59, 130, 246, 0.15);
        color: #1a1a2e;
    }
    .header:not(.scrolled) .lang-toggle i {
        color: #3b82f6;
    }
    .header.scrolled .lang-toggle {
        background: #e8f0fe;
        border-color: rgba(59, 130, 246, 0.15);
        color: #1a1a2e;
    }
    .header.scrolled .lang-toggle i {
        color: #3b82f6;
    }
    .lang-toggle:hover {
        background: #dbeafe;
    }

    .lang-dropdown {
        position: absolute;
        top: calc(100% + 10px);
        right: 0;
        min-width: 132px;
        background: #ffffff;
        backdrop-filter: blur(20px);
        border: 1px solid rgba(0, 0, 0, 0.06);
        border-radius: 14px;
        padding: 8px 0;
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .lang-toggle.active .lang-dropdown {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }
    .lang-dropdown li a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 10px 20px;
        font-size: 14px;
        font-weight: 500;
        color: #4a5568;
        transition: all 0.2s;
        border-radius: 8px;
        margin: 0 6px;
        white-space: nowrap;
    }
    .lang-dropdown li a:hover {
        color: #1a1a2e;
        background: rgba(59, 130, 246, 0.06);
    }

    /* ===== 移动端汉堡 ===== */
    .hamburger {
        display: none;
        background: none;
        border: none;
        color: #1a1a2e;
        font-size: 28px;
        cursor: pointer;
        padding: 4px;
    }
    .header:not(.scrolled) .hamburger {
        color: #1a1a2e;
    }
    .header.scrolled .hamburger {
        color: #1a1a2e;
    }
    @media (max-width: 1024px) {
        .nav-desktop {
            display: none;
        }
        .hamburger {
            display: block;
        }
        .header .container {
            justify-content: space-between;
        }
        .lang-toggle {
            margin-left: auto;
            margin-right: 12px;
        }
    }

    /* ===== 移动端侧栏 ===== */
    .mobile-overlay {
        position: fixed;
        inset: 0;
        z-index: 1100;
        background: rgba(0, 0, 0, 0.3);
        backdrop-filter: blur(4px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.4s;
    }
    .mobile-overlay.open {
        opacity: 1;
        visibility: visible;
    }
    .mobile-menu {
        position: fixed;
        top: 0;
        right: 0;
        width: 320px;
        max-width: 80vw;
        height: 100%;
        z-index: 1200;
        background: #ffffff;
        padding: 30px 28px;
        overflow-y: auto;
        transform: translateX(100%);
        transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
        border-left: 1px solid rgba(0, 0, 0, 0.04);
        box-shadow: -8px 0 40px rgba(0, 0, 0, 0.06);
    }
    .mobile-menu.open {
        transform: translateX(0);
    }
    .mobile-menu .close-btn {
        background: none;
        border: none;
        color: #1a1a2e;
        font-size: 28px;
        cursor: pointer;
        float: right;
    }
    .mobile-menu .logo-mobile {
        margin-top: 10px;
        margin-bottom: 30px;
    }
    .mobile-menu .logo-mobile img {
        height: 30px;
        filter: none;
    }
    .mobile-menu ul li a {
        display: block;
        padding: 14px 0;
        font-size: 18px;
        font-weight: 1000;
        color: #2d3748;
        border-bottom: 1px solid rgba(0, 0, 0, 0.04);
        transition: color 0.2s;
    }
    .mobile-menu ul li a:hover {
        color: #3b82f6;
    }
    .mobile-menu .sub-menu {
        padding-left: 20px;
    }
    .mobile-menu .sub-menu li a {
        font-size: 16px;
        padding: 10px 0;
        border-bottom: none;
        color: #4a5568;
    }
    .mobile-menu .sub-menu li a:hover {
        color: #3b82f6;
    }
    .mobile-menu .lang-mobile {
        margin-top: 30px;
        padding-top: 20px;
        border-top: 1px solid rgba(0, 0, 0, 0.06);
    }
    .mobile-menu .lang-mobile a {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 10px 0;
        font-weight: 500;
        color: #2d3748;
    }
    .mobile-menu .lang-mobile a i {
        color: #3b82f6;
    }

    /* ============================================================
               SECTION 懒加载基类
               ============================================================ */
    .section-hidden {
        opacity: 0;
        transform: translateY(50px);
        transition: opacity 0.8s ease, transform 0.8s ease;
    }
    .section-hidden .label {
        font-size: 20px;
        font-weight: 600;
        color: #3b82f6;
        text-transform: uppercase;
        letter-spacing: 2px;
        display: block;
        margin-bottom: 50px;
    }
    .section-visible {
        opacity: 1 !important;
        transform: translateY(0) !important;
    }

    /* ===== HERO ===== */
    .hero {
        padding-top: 130px;
        min-height: 100vh;
        display: flex;
        align-items: center;
        position: relative;
        overflow: hidden;
        background: linear-gradient(145deg, #f0f7ff 0%, #ffffff 100%);
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('https://ourtus.com/images/hero-bg.webp') center/cover no-repeat;            
        z-index: 0;
    }
    .hero .container {
        position: relative;
        z-index: 1;
        text-align: center;
    }
    .hero .slogan-wrapper {
        padding: 100px;
        display: grid;
        place-items: center;
        /* 脉冲动画通过 filter 过渡实现 */
        transition: filter 0.6s ease;
    }

    /* 所有子元素堆叠在同一网格单元格 */
    .hero .slogan-wrapper>* {
        grid-area: 1 / 1;
    }

    /* ---- 每行文字 ---- */
    .hero .slogan-text {
        text-align: center;
        font-size: 6vw !important; 
        font-weight: 700;
        line-height: 1.2;
        margin: 0;
        opacity: 0;
        transition: opacity 0.6s ease;
        color: #000000;          
    }

    /* 当前激活的行 */
    .hero .slogan-text.active {
        opacity: 1;
    }

    /* ---- 脉冲效果（由 JS 触发） ---- */
    .hero .slogan-wrapper.pulse {
        filter: blur(10px) contrast(30);
    }

    /* 让页面更干净 */
    .hero .slogan-wrapper {
        user-select: none;
    }
    @keyframes fadeUp {
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .hero .sub-desc {
        font-size: clamp(1rem, 1.3vw, 1.3rem);
        color: #4a5568;
        max-width: 720px;
        margin: 20px auto 32px;
        line-height: 1.7;
        opacity: 0;
        animation: fadeUp 0.4s 0.8s forwards;
    }
    .hero .btn-group {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
        opacity: 0;
        animation: fadeUp 0.8s 1.4s forwards;
    }
    .btn {
        padding: 14px 38px;
        border-radius: 60px;
        font-weight: 600;
        font-size: 16px;
        border: none;
        cursor: pointer;
        transition: all 0.3s;
        display: inline-block;
    }
    .btn-primary {
        background: linear-gradient(135deg, #3b82f6, #2563eb);
        color: #fff;
        box-shadow: 0 6px 28px rgba(59, 130, 246, 0.30);
    }
    .btn-primary:hover {
        transform: translateY(-3px);
        box-shadow: 0 12px 40px rgba(59, 130, 246, 0.40);
    }
    .btn-outline {
        background: transparent;
        color: #1a1a2e;
        border: 1.5px solid #cbd5e1;
    }
    .btn-outline:hover {
        background: rgba(59, 130, 246, 0.04);
        border-color: #3b82f6;
        transform: translateY(-3px);
    }

    .hero .hero-img {
        margin-top: 50px;
        opacity: 0;
        animation: fadeUp 0.9s 1.6s forwards;
    }
    .hero .hero-img img {
        width: 100%;
        max-width: 1280px;
        border-radius: 0px;

        transition: transform 0.6s;

    }
    .hero .hero-img img:hover {
        transform: scale(1.01);
    }

    /* ===== 通用标题区 ===== */
    .section-header {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: flex-end;
        margin-bottom: 48px;
        gap: 20px;
    }
    .section-header .label {
        font-size: 20px;
        font-weight: 600;
        color: #3b82f6;
        text-transform: uppercase;
        letter-spacing: 2px;
        display: block;
        margin-bottom: 25px;
    }
    .section-header h2 {
        font-size: clamp(2rem, 3.2vw, 2.8rem);
        font-weight: 700;
        letter-spacing: -0.5px;
        color: #1a1a2e;
    }
    .section-header .desc {
        color: #4a5568;
        font-size: 1.1rem;
        max-width: 460px;
        line-height: 1.6;
    }

    /* ===== 产品卡片 ===== */
    .products {
        padding: 80px 0;
        background: #ffffff;
    }
    .product-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 20px;
    }
    .productpage-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    .product-card {
        background: #ffffff;
        border: 1px solid #eef2f7;
        border-radius: 24px;
        padding: 32px 28px;
        transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
        opacity: 0;
        transform: translateY(40px);
    }
    .product-card.visible {
        opacity: 1;
        transform: translateY(0);
    }
    .product-card:hover {
        border-color: #3b82f6;
        transform: translateY(-8px);
        box-shadow: 0 20px 50px rgba(37, 99, 235, 0.2);
    }
    .product-card .icon {
        width: 80px;
        height: 80px;
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 20px;
        font-size: 28px;
        background: rgba(59, 130, 246, 0.08);
        color: #3b82f6;
    }
    .product-card .icon img {
        height: 60px;
        filter: none;
    }
    .product-card h4 {
        font-size: 1.5rem;
        font-weight: 700;
        margin-bottom: 12px;            
        color: #1a1a2e;
    }
    .product-card p {
        color: #4a5568;
        font-size: 1rem;
        line-height: 1.8;
    }

    /* ===== 关于我们 ===== */
    .about {
        padding: 80px 0;
        background: #f8faff;
    }
    .about .row {
        display: grid;
        grid-template-columns: 1fr 1.5fr;
        gap: 60px;
        align-items: center;
    }
    @media (max-width: 900px) {
        .about .row {
            grid-template-columns: 1fr;
            gap: 40px;
        }
    }
    .about h2 {
        font-size: clamp(1.8rem, 2.8vw, 2.6rem);
        font-weight: 700;
        line-height: 1.2;
        margin-bottom: 18px;
        color: #1a1a2e;
    }
    .about p {
        color: #4a5568;
        line-height: 1.8;
        margin-bottom: 28px;
    }
    .about img {
        width: 100%;
        border-radius: 24px;
        transition: transform 0.5s;
    }
    .about img:hover {
        transform: scale(1.02);
    }

    /* ===== 解决方案 ===== */
    .solutions {
        padding: 80px 0;
        background: #ffffff;
    }
    .solutions .row {
        display: grid;
        grid-template-columns: 1.5fr 1fr;
        gap: 50px;
        align-items: center;
    }
    @media (max-width: 900px) {
        .solutions .row {
            grid-template-columns: 1fr;
            gap: 40px;
        }
    }
    .accordion-item {
        background: #f8faff;
        border: 1px solid #eef2f7;
        border-radius: 16px;
        margin-bottom: 12px;
        overflow: hidden;
        transition: all 0.3s;
    }
    .accordion-item:hover {
        border-color: #d0d9e8;
    }
    .accordion-header {
        padding: 18px 24px;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: 14px;
        font-weight: 600;
        font-size: 1.6rem;
        transition: background 0.2s;
        user-select: none;
        color: #1a1a2e;
    }
    .accordion-header:hover {
        background: rgba(59, 130, 246, 0.02);
    }
    .accordion-header .icon-sm {
        width: 40px;
        height: 40px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        background: rgba(59, 130, 246, 0.08);
        color: #3b82f6;
        flex-shrink: 0;
    }
    .accordion-header .arrow {
        margin-left: auto;
        transition: transform 0.3s;
        font-size: 14px;
        color: #94a3b8;
    }
    .accordion-item.open .accordion-header .arrow {
        transform: rotate(180deg);
    }
    .accordion-body {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.4s ease;
        padding: 0 24px;
    }
    .accordion-item.open .accordion-body {
        max-height: 200px;
        padding: 0 24px 24px;
    }
    .accordion-body p {
        color: #4a5568;
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .solutions .img-box img {
        width: 100%;
        border-radius: 24px;
        transition: transform 0.5s;
    }
    .solutions .img-box img:hover {
        transform: scale(1.02);
    }

    /* ===== 数据统计 ===== */
    .stats {
        padding: 70px 0;
        background: linear-gradient(145deg, #f0f7ff 0%, #ffffff 100%);
        border-top: 1px solid rgba(0, 0, 0, 0.02);
        border-bottom: 1px solid rgba(0, 0, 0, 0.02);
    }
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
        text-align: center;
    }
    @media (max-width: 700px) {
        .stats-grid {
            grid-template-columns: 1fr;
            gap: 40px;
        }
    }
    .stats-grid .stat-item {
        opacity: 0;
        transform: translateY(30px);
        transition: all 0.6s ease;
    }
    .stats-grid .stat-item.visible {
        opacity: 1;
        transform: translateY(0);
    }
    .stats-grid .number {
        font-size: clamp(2.6rem, 4vw, 3.6rem);
        font-weight: 800;
        color: #1a1a2e;
    }
    .stats-grid .number .num {
        background: linear-gradient(135deg, #1a1a2e, #3b82f6);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    .stats-grid .label {
        font-size: 1.3rem;
        font-weight: 600;
        margin-top: 20px;
        display: block;
        color: #1a1a2e;
    }
    .stats-grid .desc {
        color: #64748b;
        font-size: 1rem;
        margin-top: 4px;
    }

    /* ===== CTA ===== */
    .cta {
        padding: 138px 0;
        background: #2563EB;
        border-top: 1px solid rgba(0, 0, 0, 0.02);
    }
    .cta .row {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 30px;
    }
    .cta h2 {
        font-size: clamp(1.8rem, 3.2vw, 3.6rem);
        font-weight: 1000;
        color: #ffffff;
    }
    .cta p {
        color: #ffffff;
        font-size: 1.1rem;
        margin-top: 6px;
    }

    /* ===== FOOTER ===== */
    .footer {
        padding: 60px 0 40px;
        background: #000000;
        border-top: 1px solid rgba(255, 255, 255, 0.03);
    }
    .footer .grid {
        display: grid;
        grid-template-columns: 2.5fr 1fr 1fr 1fr 1fr;
        gap: 40px;
    }
    @media (max-width: 800px) {
        .footer .grid {
            grid-template-columns: 1fr 1fr;
        }
    }
    @media (max-width: 500px) {
        .footer .grid {
            grid-template-columns: 1fr;
        }
    }
    .footer .logo-footer img {
        height: 30px;
        margin-bottom: 16px;
    }
    .footer .brand-text {
        color: rgba(255, 255, 255, 0.45);
        line-height: 1.8;
        font-size: 0.95rem;
    }
    .footer h5 {
        font-size: 1.2rem;
        font-weight: 800;
        color: #F59E0B;
        margin-bottom: 18px;
    }
    .footer ul li {
        margin-bottom: 10px;
    }
    .footer ul li a {
        color: rgba(255, 255, 255, 0.5);
        transition: color 0.2s;
        font-size: 1rem;
    }
    .footer ul li a:hover {
        color: #ffffff;
    }
    .footer .bottom {
        margin-top: 50px;
        padding-top: 24px;
        border-top: 1px solid rgba(255, 255, 255, 0.04);
        text-align: center;
        color: rgba(255, 255, 255, 0.4);
        font-size: 0.85rem;
    }

    /* ===== 响应式微调 ===== */
    @media (max-width: 768px) {
        .hero {
            padding-top: 110px;
            min-height: auto;
            padding-bottom: 40px;
        }
        .hero .slogan-wrapper {
            min-height: 60px;
        }
        .section-header {
            flex-direction: column;
            align-items: flex-start;
        }
        .section-header .desc {
            max-width: 100%;
        }
        .product-grid {
            grid-template-columns: 1fr;
        }
        .header {
            height: 80px;
        }
    }
    @media (max-width: 480px) {
        .product-grid {
            grid-template-columns: 1fr;
        }
    }

    .page-banner {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        position: relative;
    }
    .page-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        z-index: 1;
    }
    .page-banner .banner-content {
        position: relative;
        z-index: 2;
        text-align: center;
        color: #000000;
        padding: 0 24px;
    }
    .page-banner .banner-content h1 {
        font-size: clamp(2.8rem, 6vw, 4.8rem);
        font-weight: 800;
        letter-spacing: 2px;
        margin-bottom: 12px;
    }
    .page-banner .banner-nav {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px 24px;
        font-size: 1rem;
        font-weight: 500;
        color: rgba(0, 0, 0, 0.85);
    }
    .page-banner .banner-nav a {
        color: rgba(0, 0, 0, 0.85);
        transition: color 0.2s;
        position: relative;
    }
    .page-banner .banner-nav a:hover {
        color: #000000;
    }
    .page-banner .banner-nav .sep {
        color: rgba(0, 0, 0, 0.3);
        user-select: none;
    }

    /* 移动端适配 */
    @media (max-width: 768px) {
        .page-banner {
            height: 220px;
            margin-top: 80px;
        }
        .page-banner .banner-content h1 {
            font-size: 2.4rem;
        }
        .page-banner .banner-nav {
            font-size: 0.9rem;
            gap: 6px 16px;
        }
        .about-page {
            padding: 40px 0 60px;
        }
        .about-page .content {
            font-size: 0.98rem;
        }
    }
    @media (max-width: 480px) {
        .page-banner {
            height: 180px;
            margin-top: 70px;
        }
        .page-banner .banner-content h1 {
            font-size: 1.8rem;
        }
        .page-banner .banner-nav {
            font-size: 0.8rem;
            gap: 4px 10px;
        }
    }

    /* ===== HERO ===== */
    .page-hero {
        padding-top: 30px;
        min-height: 50vh;
        display: flex;
        align-items: center;
        position: relative;
        overflow: hidden;
        background: linear-gradient(145deg, #f0f7ff 0%, #ffffff 100%);
    }
    .page-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('https://ourtus.com/images/hero-bg.webp') center/cover no-repeat;            
        z-index: 0;
    }
    .page-hero .container {
        position: relative;
        z-index: 1;
        text-align: center;
    }
    .page-hero .slogan-wrapper {
        padding: 100px;
        display: grid;
        place-items: center;
        /* 脉冲动画通过 filter 过渡实现 */
        transition: filter 0.6s ease;
    }

    /* ===== 新闻列表样式 ===== */
    .news-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 30px;
        margin-top: 10px;
    }

    @media (max-width: 768px) {
        .news-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
    }

    .news-card {
        background: #ffffff;
        border: 1px solid #eef2f7;
        border-radius: 20px;
        transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        overflow: hidden;
        position: relative;
    }

    .news-card:hover {
        border-color: #3b82f6;
        transform: translateY(-6px);
        box-shadow: 0 20px 50px rgba(37, 99, 235, 0.12);
    }

    .news-card-inner {
        padding: 28px 30px 30px;
    }

    .news-tag {
        display: inline-block;
        font-size: 12px;
        font-weight: 600;
        color: #3b82f6;
        background: rgba(59, 130, 246, 0.08);
        padding: 4px 14px;
        border-radius: 20px;
        letter-spacing: 0.5px;
        text-transform: uppercase;
        margin-bottom: 14px;
    }

    .news-title {
        font-size: 1.35rem;
        font-weight: 700;
        line-height: 1.4;
        color: #1a1a2e;
        margin: 0 0 12px 0;
        transition: color 0.2s;
    }

    .news-card:hover .news-title {
        color: #2563eb;
    }

    .news-excerpt {
        font-size: 0.98rem;
        line-height: 1.7;
        color: #4a5568;
        margin: 0 0 18px 0;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .news-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-top: 16px;
        border-top: 1px solid #f0f2f5;
        flex-wrap: wrap;
        gap: 8px;
    }

    .news-date {
        font-size: 0.88rem;
        color: #94a3b8;
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .news-date i {
        font-size: 0.8rem;
    }

    .news-readmore a {
        font-size: 0.88rem;
        font-weight: 600;
        color: #3b82f6;
        transition: color 0.2s;
        text-decoration: none;
    }

    .news-readmore a:hover {
        color: #1d4ed8;
    }

    /* ===== 分页导航 ===== */
    .pagination {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        margin-top: 48px;
        padding-top: 10px;
        flex-wrap: wrap;
    }

    .page-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 44px;
        height: 44px;
        padding: 0 16px;
        font-size: 0.95rem;
        font-weight: 500;
        color: #4a5568;
        background: #ffffff;
        border: 1px solid #e2e8f0;
        border-radius: 10px;
        transition: all 0.25s ease;
        text-decoration: none;
        cursor: pointer;
    }

    .page-btn:hover {
        background: #f1f5f9;
        border-color: #cbd5e1;
        color: #1a1a2e;
    }

    .page-btn.active {
        background: #3b82f6;
        border-color: #3b82f6;
        color: #ffffff;
        box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
    }

    .page-btn.active:hover {
        background: #2563eb;
        border-color: #2563eb;
    }

    .page-btn.prev,
    .page-btn.next {
        gap: 6px;
        padding: 0 20px;
    }

    .page-btn.prev i,
    .page-btn.next i {
        font-size: 0.75rem;
    }

    @media (max-width: 480px) {
        .page-btn {
            min-width: 38px;
            height: 38px;
            font-size: 0.85rem;
            padding: 0 12px;
        }
        .page-btn.prev,
        .page-btn.next {
            padding: 0 14px;
        }
        .pagination {
            gap: 4px;
        }
    }

    /* ===== 新闻详情页 ===== */

    /* 新闻头部 */
    .news-detail-header {
        margin-bottom: 40px;
        text-align: center;
    }

    .news-meta-tag {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: center;
        gap: 16px 24px;
        margin-bottom: 18px;
    }

    .news-category {
        display: inline-block;
        font-size: 0.8rem;
        font-weight: 600;
        color: #3b82f6;
        background: rgba(59, 130, 246, 0.10);
        padding: 4px 18px;
        border-radius: 20px;
        text-transform: uppercase;
        letter-spacing: 0.8px;
    }

    .news-date,
    .news-readtime {
        font-size: 0.9rem;
        color: #94a3b8;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .news-date i,
    .news-readtime i {
        font-size: 0.85rem;
    }

    .news-card-link {
        color: inherit;
        display: block;
        text-decoration: none;
    }

    .news-card-link-disabled {
        cursor: default;
    }

    .news-grid.is-loading {
        opacity: 0.45;
        pointer-events: none;
    }

    .news-empty {
        color: #64748b;
        grid-column: 1 / -1;
        margin: 24px 0;
        text-align: center;
    }

    .news-detail-title {
        font-size: clamp(2rem, 3.6vw, 3.2rem);
        font-weight: 800;
        color: #1a1a2e;
        line-height: 1.2;
        margin: 0 0 16px 0;
        letter-spacing: -0.5px;
    }

    .news-detail-subtitle {
        font-size: clamp(1rem, 1.2vw, 1.2rem);
        color: #4a5568;
        max-width: 720px;
        margin: 0 auto;
        line-height: 1.7;
    }

    /* 特色图片（居中、圆角） */
    .news-featured-image {
        margin: 10px 0 44px 0;
        text-align: center;
    }

    .news-featured-image img {
        width: 100%;
        max-width: 900px;
        border-radius: 24px;
        display: block;
        margin: 0 auto;
        transition: transform 0.4s ease;
    }

    .news-featured-image img:hover {
        transform: scale(1.005);
    }

    /* 正文容器 */
    .news-detail-body {
        max-width: 900px;
        margin: 0 auto;
    }

    .news-intro {
        font-size: 1.15rem;
        line-height: 1.9;
        color: #1a1a2e;
        margin-bottom: 38px;
        padding-bottom: 28px;
        border-bottom: 1px solid #eef2f7;
    }

    .news-intro strong {
        color: #1a1a2e;
    }

    /* 图文混排行 */
    .news-media-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        align-items: center;
        margin-bottom: 44px;
    }

    .news-media-row.reverse {
        direction: rtl;
    }
    .news-media-row.reverse > * {
        direction: ltr;
    }

    @media (max-width: 820px) {
        .news-media-row {
            grid-template-columns: 1fr;
            gap: 24px;
            margin-bottom: 34px;
        }
        .news-media-row.reverse {
            direction: ltr;
        }
        .news-media-row.reverse .news-media-image {
            order: -1;
        }
    }

    .news-media-text h3 {
        font-size: 1.4rem;
        font-weight: 700;
        color: #1a1a2e;
        margin: 0 0 12px 0;
    }

    .news-media-text p {
        font-size: 0.98rem;
        line-height: 1.8;
        color: #4a5568;
        margin: 0 0 16px 0;
    }

    .news-feature-list {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-wrap: wrap;
        gap: 6px 18px;
    }

    .news-feature-list li {
        font-size: 0.92rem;
        color: #1a1a2e;
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .news-feature-list li i {
        color: #3b82f6;
        font-size: 0.85rem;
    }

    .news-media-image {
        border-radius: 18px;
        overflow: hidden;
        transition: transform 0.4s ease, box-shadow 0.4s ease;
    }

    .news-media-image:hover {
        transform: scale(1.01);
        box-shadow: 0 8px 32px rgba(37, 99, 235, 0.08);
    }

    .news-media-image img {
        width: 100%;
        height: auto;
        display: block;
    }

    /* 引用块 */
    .news-quote {
        margin: 12px 0 44px 0;
        padding: 28px 36px;
        background: #f8faff;
        border-left: 4px solid #3b82f6;
        border-radius: 12px;
        font-style: italic;
    }

    .news-quote p {
        font-size: 1.1rem;
        line-height: 1.7;
        color: #1a1a2e;
        margin: 0 0 8px 0;
    }

    .news-quote cite {
        font-size: 0.95rem;
        color: #64748b;
        font-style: normal;
        display: block;
        text-align: right;
    }

    /* 结尾 */
    .news-conclusion {
        margin-top: 20px;
        padding-top: 32px;
        border-top: 1px solid #eef2f7;
    }

    .news-conclusion p {
        font-size: 1.02rem;
        line-height: 1.8;
        color: #1a1a2e;
    }

    .news-action {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 16px;
        margin-top: 28px;
    }

    @media (max-width: 480px) {
        .news-action .btn {
            width: 100%;
            justify-content: center;
        }
        .news-quote {
            padding: 20px 22px;
        }
        .news-quote p {
            font-size: 1rem;
        }
        .news-meta-tag {
            gap: 10px 16px;
        }
        .news-detail-title {
            font-size: 1.8rem;
        }
    }

    /* 联系方式——邮箱列表 */
    .contact-list {
        display: flex;
        flex-direction: column;
        gap: 18px;
    }

    .contact-item {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 14px 20px;
        background: #f8faff;
        border-radius: 16px;
        border: 1px solid #eef2f7;
        transition: background 0.2s, border-color 0.2s;
    }

    .contact-item:hover {
        background: #ffffff;
        border-color: #3b82f6;
        box-shadow: 0 4px 12px rgba(59, 130, 246, 0.08);
    }

    .contact-item a {
        font-weight: 500;
    }

    /* 二维码区域自适应 */
    @media (max-width: 768px) {
        .qr-grid {
            grid-template-columns: repeat(3, 1fr) !important;
            gap: 16px !important;
        }
        .qr-item img {
            max-width: 100px !important;
        }
    }

    @media (max-width: 480px) {
        .qr-grid {
            grid-template-columns: repeat(3, 1fr) !important;
            gap: 12px !important;
        }
        .qr-item img {
            max-width: 80px !important;
        }
    }

    /* ===== 解决方案目录列表 ===== */
    .solutions-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
        margin-top: 10px;
    }

    @media (max-width: 1024px) {
        .solutions-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    @media (max-width: 640px) {
        .solutions-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
    }

    .solution-card {
        background: #ffffff;
        border: 1px solid #eef2f7;
        border-radius: 20px;
        padding: 32px 28px 28px;
        transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
        display: flex;
        flex-direction: column;
        position: relative;
        overflow: hidden;
    }

    /* 顶部装饰线 */
    .solution-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: linear-gradient(90deg, #3b82f6, #60a5fa, #3b82f6);
        background-size: 200% 100%;
        opacity: 0;
        transition: opacity 0.4s ease;
    }

    .solution-card:hover::before {
        opacity: 1;
    }

    .solution-card:hover {
        border-color: #3b82f6;
        transform: translateY(-6px);
        box-shadow: 0 20px 50px rgba(37, 99, 235, 0.10);
    }

    .solution-icon {
        width: 56px;
        height: 56px;
        border-radius: 14px;
        background: rgba(59, 130, 246, 0.08);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        color: #3b82f6;
        margin-bottom: 18px;
        transition: background 0.3s, transform 0.3s;
    }

    .solution-card:hover .solution-icon {
        background: rgba(59, 130, 246, 0.14);
        transform: scale(1.04);
    }

    .solution-title {
        font-size: 1.2rem;
        font-weight: 700;
        color: #1a1a2e;
        margin: 0 0 12px 0;
        line-height: 1.3;
    }

    .solution-desc {
        font-size: 0.95rem;
        line-height: 1.7;
        color: #4a5568;
        margin: 0 0 18px 0;
        flex: 1;
    }

    .solution-link {
        font-size: 0.95rem;
        font-weight: 600;
        color: #3b82f6;
        text-decoration: none;
        transition: color 0.2s, transform 0.2s;
        display: inline-flex;
        align-items: center;
        gap: 4px;
    }

    .solution-link:hover {
        color: #1d4ed8;
        transform: translateX(4px);
    }

    /* ===== 软件详细介绍 ===== */
    .software-row {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 50px;
        margin-bottom: 60px;
    }

    /* 默认：文字在左，图片在右 */
    .software-row .software-text {
        flex: 1 1 45%;
        min-width: 280px;
    }
    .software-row .software-image {
        flex: 1 1 45%;
        min-width: 280px;
    }

    /* 交替行：图片在左，文字在右 */
    .software-row.reverse {
        flex-direction: row-reverse;
    }

    /* 响应式：小屏幕时取消交替，恢复文字在上、图片在下 */
    @media (max-width: 900px) {
        .software-row {
            flex-direction: column !important;  /* 强制改为列 */
            gap: 30px;
            margin-bottom: 40px;
        }
        .software-row .software-text,
        .software-row .software-image {
            flex: 1 1 auto;
            min-width: 0;
            width: 100%;
        }
        /* 确保图片在文字上方（因为dom顺序文字在前，图片在后，用order调整） */
        .software-row .software-image {
            order: -1;  /* 图片移到文字上方 */
        }
    }

    .software-text .tag {
        display: inline-block;
        font-size: 0.8rem;
        font-weight: 600;
        color: #3b82f6;
        background: rgba(59, 130, 246, 0.08);
        padding: 4px 16px;
        border-radius: 20px;
        text-transform: uppercase;
        letter-spacing: 0.8px;
        margin-bottom: 12px;
    }

    .software-text h3 {
        font-size: 1.7rem;
        font-weight: 700;
        color: #1a1a2e;
        margin: 0 0 16px 0;
        line-height: 1.3;
    }

    .software-text p {
        font-size: 1rem;
        line-height: 1.8;
        color: #4a5568;
        margin: 0 0 20px 0;
    }

    .feature-list {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-wrap: wrap;
        gap: 8px 20px;
    }

    .feature-list li {
        font-size: 0.95rem;
        color: #1a1a2e;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .feature-list li i {
        color: #3b82f6;
        font-size: 1rem;
    }

    .software-image {
        border-radius: 20px;
        overflow: hidden;
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
        transition: transform 0.4s ease, box-shadow 0.4s ease;
        background: #f8faff;
    }

    .software-image:hover {
        transform: scale(1.01);
        box-shadow: 0 16px 48px rgba(37, 99, 235, 0.10);
    }

    .software-image img {
        width: 100%;
        height: auto;
        display: block;
    }

    /* ===== 解决方案详情页 ===== */
    .solution-detail-header {
        text-align: center;
        margin-bottom: 48px;
    }
    .solution-detail-header .label {
        display: inline-block;
        font-size: 0.85rem;
        font-weight: 600;
        color: #3b82f6;
        text-transform: uppercase;
        letter-spacing: 2px;
        margin-bottom: 6px;
    }
    .solution-detail-header h2 {
        font-size: clamp(2.2rem, 4vw, 3.2rem);
        font-weight: 800;
        color: #1a1a2e;
        margin: 0 0 12px 0;
        letter-spacing: -0.5px;
    }
    .solution-detail-sub {
        font-size: clamp(1rem, 1.2vw, 1.2rem);
        color: #4a5568;
        max-width: 640px;
        margin: 0 auto;
        line-height: 1.7;
    }
    .sd-block {
        max-width: 960px;
        margin: 0 auto 56px auto;
    }
    .sd-block.reverse {
        display: flex;
        flex-direction: column;
    }
    .sd-image {
        text-align: center;
        margin-bottom: 24px;
    }
    .sd-image img {
        max-width: 100%;
        width: 100%;
        border-radius: 24px;
        display: inline-block;
    }
    .sd-text h3 {
        font-size: 1.5rem;
        font-weight: 700;
        color: #1a1a2e;
        margin: 0 0 12px 0;
        line-height: 1.3;
    }
    .sd-text p {
        font-size: 1.02rem;
        line-height: 1.8;
        color: #4a5568;
        margin: 0;
        max-width: 820px;
    }
    .sd-block.reverse .sd-text {
        order: 1;
        margin-bottom: 16px;
    }
    .sd-block.reverse .sd-image {
        order: 2;
        margin-bottom: 0;
    }
    .sd-action {
        max-width: 820px;
        margin: 20px auto 0;
        padding-top: 40px;
        border-top: 1px solid #eef2f7;
        text-align: center;
    }
    .sd-action p {
        font-size: 1.1rem;
        color: #1a1a2e;
        font-weight: 500;
        margin: 0 0 24px 0;
    }
    .sd-action-buttons {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: center;
        gap: 16px;
    }
    @media (max-width: 640px) {
        .sd-block {
            margin-bottom: 40px;
        }
        .sd-text h3 {
            font-size: 1.3rem;
        }
        .sd-text p {
            font-size: 0.96rem;
        }
        .sd-action p {
            font-size: 1rem;
        }
        .sd-action-buttons .btn {
            width: 100%;
            justify-content: center;
        }
    }

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

/* 平板：一行2个 */
@media (max-width: 900px) {
    .productpage-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}

/* 手机：一行1个 */
@media (max-width: 480px) {
    .productpage-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
}