@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');


        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
body {
    font-family: 'DM Sans', sans-serif;
    background:#0F172A;
    color: #F8FAFC;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

:root {
    --surface-primary: rgba(30, 64, 175, 0.5);
    --surface-secondary: rgba(15, 34, 94, 0.5);
    --surface-nav: rgba(30, 64, 175, 0.92);
}
        
        /* 鼠标跟随光效 */
        .cursor {
            position: fixed;
            width: 20px;
            height: 20px;
            background: rgba(30, 64, 255, 0.5);
            border-radius: 50%;
            pointer-events: none;
            z-index: 9999;
            mix-blend-mode: difference;
            transition: transform 0.1s ease;
        }
        
        /* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--surface-nav);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}
        
        .navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
        }
        
        .nav-right {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        /* 多语言下拉菜单 */
        .lang-dropdown {
            position: relative;
        }
        
        .lang-toggle {
            background: rgba(59, 130, 246, 0.2);
            border: 1px solid rgba(59, 130, 246, 0.4);
            border-radius: 20px;
            padding: 6px 12px;
            color: #ffffff;
            font-size: 0.875rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        
        .lang-toggle:hover {
            background: rgba(59, 130, 246, 0.4);
            transform: translateY(-2px);
        }
        
        .lang-menu {
            position: absolute;
            top: calc(100% + 8px);
            right: 0;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(59, 130, 246, 0.3);
            border-radius: 12px;
            padding: 8px;
            min-width: 140px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: all 0.3s ease;
            z-index: 1001;
        }
        
        .lang-dropdown.active .lang-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        
        .lang-option {
            padding: 10px 16px;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.2s ease;
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.8);
            text-align: left;
        }
        
        .lang-option:hover {
            background: rgba(59, 130, 246, 0.2);
            color: #ffffff;
        }
        
        .lang-option.active {
            background: rgba(59, 130, 246, 0.3);
            color: #3b82f6;
            font-weight: 600;
        }
        
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #3b82f6;
        }
        
.nav-links {
            display: flex;
            list-style: none;
            gap: 30px;
        }

        .nav-links > li {
            position: relative;
        }
        
        .nav-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .nav-links a:hover {
            color: #3b82f6;
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: #3b82f6;
            transition: width 0.3s ease;
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-item-dropdown:hover .nav-submenu,
        .nav-item-dropdown:focus-within .nav-submenu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .nav-submenu {
            position: absolute;
            top: calc(100% + 18px);
            left: 0;
            min-width: 280px;
            padding: 12px;
            list-style: none;
            border-radius: 16px;
            background: rgba(15, 23, 42, 0.98);
            border: 1px solid rgba(59, 130, 246, 0.25);
            backdrop-filter: blur(14px);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.25s ease;
            z-index: 1002;
        }

        .nav-submenu li + li {
            margin-top: 6px;
        }

        .nav-submenu a {
            display: block;
            padding: 10px 12px;
            border-radius: 10px;
        }

        .nav-submenu a:hover {
            background: rgba(59, 130, 246, 0.16);
        }

        .nav-submenu a::after {
            display: none;
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: #ffffff;
            font-size: 1.5rem;
            cursor: pointer;
        }
        
        /* 容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 通用部分样式 */
        section {
            padding: 100px 0;
        }

        body[data-page]:not([data-page='index']) section:first-of-type {
            padding-top: 160px;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 80px;
        }
        
        .section-title h2 {
            font-family: 'Space Grotesk', sans-serif;
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 700;
            margin-bottom: 1rem;
            background: linear-gradient(45deg, #F59E0B, #FBBF24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .section-title p {
            font-size: 1.125rem;
            opacity: 0.8;
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* 核心技术模块特殊标题样式 */
        .products .section-title h2 {
            background: linear-gradient(90deg, #3B82F6, #60A5FA);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
            display: inline-block;
        }
        
        .products .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, #2563EB, #3B82F6);
            border-radius: 2px;
        }
        
        .products .section-title p {
            font-size: 1.125rem;
            opacity: 0.8;
            max-width: 700px;
            margin: 24px auto 0;
            line-height: 1.6;
        }
        
        /* 通用按钮样式 */
        .btn {
            display: inline-block;
            padding: 12px 24px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .btn-primary {
            background: linear-gradient(45deg, #3b82f6, #60a5fa);
            color: #ffffff;
        }
        
        .btn-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: #ffffff;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, #60a5fa, #3b82f6);
            transition: left 0.5s ease;
            z-index: 0;
        }
        
        .btn-primary::before {
            background: linear-gradient(45deg, #60a5fa, #3b82f6);
        }
        
        .btn-secondary::before {
            background: linear-gradient(45deg, rgba(255, 255, 255, 0.2), rgba(59, 130, 246, 0.2));
        }
        
        .btn:hover::before {
            left: 0;
        }
        
        .btn span {
            position: relative;
            z-index: 1;
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
        }
        
        /* 动画 */
        @keyframes fadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes pulse {
            0% {
                transform: scale(1);
                opacity: 1;
            }
            50% {
                transform: scale(1.1);
                opacity: 0.7;
            }
            100% {
                transform: scale(1);
                opacity: 1;
            }
        }
        
        @keyframes float {
            0% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-10px);
            }
            100% {
                transform: translateY(0);
            }
        }
        
        /* HERO区域 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--surface-secondary);
}
        
        .geo-shapes {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 1;
        }
        
        .geo-shapes div {
            position: absolute;
            background: rgba(59, 130, 246, 0.1);
            border-radius: 50%;
            animation: float 6s ease-in-out infinite;
        }
        
        .geo-shapes .shape-1 {
            width: 200px;
            height: 200px;
            top: 20%;
            left: 10%;
            animation-delay: 0s;
        }
        
        .geo-shapes .shape-2 {
            width: 150px;
            height: 150px;
            top: 60%;
            right: 15%;
            animation-delay: 2s;
        }
        
        .geo-shapes .shape-3 {
            width: 100px;
            height: 100px;
            bottom: 30%;
            left: 20%;
            animation-delay: 4s;
        }
        
        .particles {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 2;
        }
        
        .hero-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .hero-title {
            font-size: clamp(3rem, 8vw, 5rem);
            font-weight: 700;
            margin-bottom: 1.5rem;
            background: linear-gradient(45deg, #ffffff, #3b82f6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
        }
        
        .hero-subtitle {
            font-size: 1.25rem;
            opacity: 0.8;
            margin-bottom: 3rem;
        }
        
        .cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .scroll-indicator {
            position: absolute;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 3;
            animation: pulse 2s ease-in-out infinite;
        }
        
        .scroll-indicator svg {
            width: 24px;
            height: 24px;
            fill: #ffffff;
            opacity: 0.7;
        }
        
        /* 关于我们 */
.about {
    background: var(--surface-primary);
}
        
        .about-content {
            display: grid;
            grid-template-columns: 1fr;
            gap: 0;
            align-items: start;
        }
        
        .timeline {
            --timeline-gutter: 56px;
            --timeline-marker: 18px;
            position: relative;
            width: 100%;
            max-width: 1100px;
            margin: 0 auto;
            padding: 12px 0;
        }
        
        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            transform: translateX(-50%);
            background: linear-gradient(to bottom, rgba(59, 130, 246, 0.9), rgba(59, 130, 246, 0.15));
        }
        
        .timeline-item {
            position: relative;
            width: calc(50% - var(--timeline-gutter));
            padding: 22px 24px;
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 14px;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.6s ease forwards;
        }
        
        .timeline-item:nth-child(odd) {
            margin-top: -30px;
            margin-bottom: 16px;
        }
        
        .timeline-item:nth-child(even) {
            left: calc(50% + var(--timeline-gutter));
            margin-top: -40px;
            margin-bottom: 16px;
        }
        
        .timeline-item:nth-child(1) { animation-delay: 0.05s; }
        .timeline-item:nth-child(2) { animation-delay: 0.10s; }
        .timeline-item:nth-child(3) { animation-delay: 0.15s; }
        .timeline-item:nth-child(4) { animation-delay: 0.20s; }
        .timeline-item:nth-child(5) { animation-delay: 0.25s; }
        
        .timeline-item::before {
            content: '';
            position: absolute;
            top: 34px;
            width: var(--timeline-marker);
            height: var(--timeline-marker);
            background: #3b82f6;
            border-radius: 999px;
            border: 3px solid #1e3a8a;
        }
        
        .timeline-item::after {
            content: '';
            position: absolute;
            top: calc(34px + (var(--timeline-marker) / 2) - 1px);
            width: var(--timeline-gutter);
            height: 2px;
            background: linear-gradient(90deg, rgba(59, 130, 246, 0.7), rgba(59, 130, 246, 0.2));
        }
        
        .timeline-item:nth-child(odd)::before {
            left: calc(100% + var(--timeline-gutter));
            transform: translateX(-50%);
        }
        
        .timeline-item:nth-child(even)::before {
            left: calc(var(--timeline-gutter) * -1);
            transform: translateX(-50%);
        }
        
        .timeline-item:nth-child(odd)::after {
            left: 100%;
        }
        
        .timeline-item:nth-child(even)::after {
            left: calc(var(--timeline-gutter) * -1);
        }
        
        .timeline-date {
            display: inline-flex;
            padding: 6px 10px;
            border-radius: 999px;
            border: 1px solid rgba(59, 130, 246, 0.35);
            background: rgba(59, 130, 246, 0.12);
            font-size: 0.875rem;
            color: #93c5fd;
            font-weight: 700;
            letter-spacing: 0.02em;
            margin-bottom: 12px;
        }
        
        .timeline-title {
            font-size: 1.25rem;
            font-weight: 650;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        
        .timeline-description {
            font-size: 0.9375rem;
            opacity: 0.86;
            line-height: 1.7;
        }
        
        .timeline-block + .timeline-block {
            margin-top: 14px;
        }
        
        .timeline-block-title {
            font-size: 0.8125rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: rgba(147, 197, 253, 0.95);
            margin-bottom: 6px;
        }
        
        .timeline-block-text strong {
            color: #e2e8f0;
        }
        
        @media (max-width: 768px) {
            .timeline {
                --timeline-gutter: 34px;
                max-width: 680px;
                padding: 0;
            }
        
            .timeline::before {
                left: 10px;
                transform: none;
            }
        
            .timeline-item {
                width: calc(100% - 40px);
                left: 40px;
                margin-bottom: 22px;
            }
        
            .timeline-item:nth-child(even) {
                left: 40px;
            }
        
            .timeline-item::before {
                left: calc(var(--timeline-gutter) * -1);
                transform: translateX(-50%);
            }
        
            .timeline-item::after {
                left: calc(var(--timeline-gutter) * -1);
            }
        }
        
        .university-logos {
            display: none;
        }
        
        .university-card {
            display: none;
        }
        
        .core-data {
            display: none;
        }
        
        .data-item {
            text-align: center;
            padding: 30px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.6s ease forwards;
        }
        
        .data-item:nth-child(1) { animation-delay: 0.6s; }
        .data-item:nth-child(2) { animation-delay: 0.7s; }
        .data-item:nth-child(3) { animation-delay: 0.8s; }
        
        .data-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: #3b82f6;
            margin-bottom: 10px;
        }
        
        .data-label {
            font-size: 0.875rem;
            opacity: 0.7;
        }
        
        /* 工程案例 */
.cases {
    background: var(--surface-secondary);
}
        
        .filter-buttons {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 60px;
            flex-wrap: wrap;
        }
        
        .filter-btn {
            padding: 8px 20px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 20px;
            color: #ffffff;
            font-size: 0.875rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .filter-btn.active {
            background: #3b82f6;
            border-color: #3b82f6;
        }
        
        .filter-btn:hover {
            background: rgba(59, 130, 246, 0.5);
        }
        
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
        }

        .detail-grid {
            max-width: 1080px;
            margin: 0 auto;
        }
        
        .project-card {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
            opacity: 1;
            transform: translateY(0);
        }
        
        .project-card.animate {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.6s ease forwards;
        }
        
        .project-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(59, 130, 246, 0.3);
        }
        
        .project-image {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        
        .project-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }
        
        .project-card:hover .project-image img {
            transform: scale(1.1);
        }
        
        .client-tag {
            position: absolute;
            top: 15px;
            left: 15px;
            background: rgba(59, 130, 246, 0.9);
            color: #ffffff;
            padding: 5px 12px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        
        .project-content {
            padding: 25px;
        }
        
        .project-title {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        
        .project-description {
            font-size: 0.875rem;
            opacity: 0.8;
            margin-bottom: 15px;
            line-height: 1.5;
        }
        
        .project-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        
        .tag {
            background: rgba(59, 130, 246, 0.3);
            color: #ffffff;
            padding: 4px 12px;
            border-radius: 12px;
            font-size: 0.75rem;
        }
        
        /* 即将推出标签 */
        .soon-badge {
            display: inline-block;
            background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
            color: white;
            font-size: 0.65rem;
            font-weight: 600;
            padding: 0.15rem 0.4rem;
            border-radius: 20px;
            margin-left: 0.5rem;
            white-space: nowrap;
        }
        
        .coming-soon-link {
            color: #666 !important;
        }
        
        .coming-soon-link:hover {
            background: rgba(0, 0, 0, 0.03) !important;
            color: #555 !important;
        }
        
        /* 产品展示 */
.products {
    background: var(--surface-primary);
}
        
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
    align-items: stretch;
    margin-bottom: 60px;
}

.product-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 24px;
    padding: 28px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
        
        .product-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #2563EB, #3B82F6);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }
        
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 24px 48px rgba(59, 130, 246, 0.15);
            border-color: rgba(59, 130, 246, 0.4);
        }
        
        .product-card:hover::before {
            transform: scaleX(1);
        }
        
        .product-card:nth-child(1) { animation-delay: 0.1s; }
        .product-card:nth-child(2) { animation-delay: 0.3s; }
        .product-card:nth-child(3) { animation-delay: 0.5s; }
        
.product-header {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 24px;
}
        
.product-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #2563EB, #3B82F6);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.3);
    transition: all 0.3s ease;
    flex-shrink: 0;
}
        
        .product-card:hover .product-icon {
            transform: scale(1.05);
            box-shadow: 0 12px 32px rgba(59, 130, 246, 0.4);
        }
        
.product-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    background: linear-gradient(90deg, #F8FAFC, #CBD5E1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
.product-info p {
    font-size: 0.875rem;
    opacity: 0.7;
    line-height: 1.5;
}

.product-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: auto;
}

.product-image {
    position: relative;
    border-radius: 16px;
            overflow: hidden;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.05));
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(59, 130, 246, 0.1);
    transition: all 0.3s ease;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
        
        .product-card:hover .product-image {
            border-color: rgba(59, 130, 246, 0.3);
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(59, 130, 246, 0.1));
        }
        
        /* 图片样式 */
        img {
            max-width: 100%;
            height: auto;
            transition: transform 0.3s ease;
        }
        
        .product-card:hover img {
            transform: scale(1.05);
        }
        
.product-specs {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(59, 130, 246, 0.1);
    transition: border-color 0.3s ease;
}
        
        .product-card:hover .spec-item {
            border-color: rgba(59, 130, 246, 0.2);
        }
        
.spec-label {
    font-size: 0.875rem;
    opacity: 0.7;
    font-weight: 500;
}

.spec-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: #3b82f6;
    background: linear-gradient(90deg, #3B82F6, #60A5FA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
    text-align: right;
}
        
        .product-card:hover .spec-value {
            transform: translateX(4px);
        }
        
        .video-placeholder {
            position: relative;
            border-radius: 12px;
            overflow: hidden;
            background: rgba(0, 0, 0, 0.5);
            height: 200px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            animation: pulse 3s ease-in-out infinite;
        }
        
        .video-placeholder .play-btn {
            width: 60px;
            height: 60px;
            background: rgba(59, 130, 246, 0.8);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .video-placeholder .play-btn:hover {
            background: #3b82f6;
            transform: scale(1.1);
        }
        
        .video-placeholder .play-btn svg {
            width: 24px;
            height: 24px;
            fill: #ffffff;
            margin-left: 5px;
        }
        
        .video-placeholder p {
            font-size: 0.875rem;
            opacity: 0.7;
        }
        
        /* 智能车产品 */
        .smart-car {
            position: relative;
        }
        
        .carousel {
            position: relative;
            margin-bottom: 30px;
        }
        
        .carousel-container {
            overflow: hidden;
            border-radius: 12px;
        }
        
        .carousel-slides {
            display: flex;
            transition: transform 0.5s ease;
        }
        
        .carousel-slide {
            min-width: 100%;
            height: 200px;
            background: rgba(0, 0, 0, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .carousel-btn {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border: none;
            border-radius: 50%;
            color: #ffffff;
            font-size: 1.25rem;
            cursor: pointer;
            transition: all 0.3s ease;
            z-index: 10;
        }
        
        .carousel-btn:hover {
            background: rgba(15, 52, 96, 0.5);
        }
        
        .carousel-btn.prev {
            left: 10px;
        }
        
        .carousel-btn.next {
            right: 10px;
        }
        
        .tech-highlights {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-bottom: 30px;
        }
        
        .highlight-item {
            background: rgba(59, 130, 246, 0.2);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
            transition: all 0.3s ease;
        }
        
        .highlight-item:hover {
            background: rgba(59, 130, 246, 0.3);
            transform: translateY(-5px);
        }
        
        .highlight-item svg {
            width: 32px;
            height: 32px;
            fill: #3b82f6;
            margin-bottom: 10px;
        }
        
        .highlight-item h4 {
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: 5px;
        }
        
        .highlight-item p {
            font-size: 0.75rem;
            opacity: 0.7;
        }
        
        .specs-table {
            width: 100%;
            border-collapse: collapse;
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border-radius: 12px;
            overflow: hidden;
        }
        
        .specs-table th,
        .specs-table td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .specs-table th {
            background: rgba(59, 130, 246, 0.3);
            font-weight: 600;
            font-size: 0.875rem;
        }
        
        .specs-table td {
            font-size: 0.875rem;
        }
        
        .specs-table tr:last-child td {
            border-bottom: none;
        }
        
        /* 技术实力 */
.technology {
    background: var(--surface-secondary);
}
        
        .tech-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            margin-bottom: 60px;
        }
        
        .architecture-diagram {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            padding: 40px;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.6s ease forwards;
        }
        
        .diagram-container {
            position: relative;
            max-width: 500px;
            margin: 0 auto;
        }
        
        .diagram-layer {
            display: flex;
            justify-content: space-around;
            margin-bottom: 40px;
            position: relative;
        }
        
        .diagram-box {
            background: rgba(59, 130, 246, 0.3);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
            min-width: 120px;
            transition: all 0.3s ease;
        }
        
        .diagram-box:hover {
            background: rgba(59, 130, 246, 0.5);
            transform: translateY(-5px);
        }
        
        .diagram-box h4 {
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: 5px;
            color: #3b82f6;
        }
        
        .diagram-box p {
            font-size: 0.75rem;
            opacity: 0.7;
        }
        
        .diagram-connector {
            display: none;
        }
        
        .layer-title {
            text-align: center;
            margin-bottom: 20px;
            font-size: 1rem;
            font-weight: 600;
            color: #F59E0B;
        }
        
        .application-scenarios {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.6s ease forwards;
            animation-delay: 0.2s;
        }
        
        .scenario-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }
        
        .scenario-card {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 16px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
        }
        
        .scenario-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(59, 130, 246, 0.3);
        }
        
        .scenario-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(45deg, #3b82f6, #60a5fa);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin: 0 auto 20px;
        }
        
        .scenario-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        
        .scenario-card p {
            font-size: 0.875rem;
            opacity: 0.8;
            line-height: 1.5;
        }
        
        .client-logos {
            margin-top: 60px;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.6s ease forwards;
            animation-delay: 0.4s;
        }
        
        .client-logos h3 {
            text-align: center;
            margin-bottom: 40px;
            font-size: 1.25rem;
            font-weight: 600;
            color: #3b82f6;
        }
        
        .logos-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 30px;
        }

        .partners-grid {
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 24px;
        }

        .logo-item {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            padding: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            height: 80px;
        }

        .partner-card {
            min-height: 146px;
            height: auto;
            flex-direction: column;
            gap: 14px;
            padding: 24px 18px;
        }

        .partner-logo-circle {
            width: 116px;
            height: 116px;
            border-radius: 50%;
            background: radial-gradient(circle at 30% 30%, rgba(147, 197, 253, 0.22), rgba(30, 64, 175, 0.18));
            border: 1px solid rgba(147, 197, 253, 0.24);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0;
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), 0 12px 28px rgba(30, 64, 175, 0.22);
            overflow: hidden;
        }
        
        .logo-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
        }
        
        .logo-item p {
            font-size: 1rem;
            font-weight: 600;
            color: #3b82f6;
        }

        .logo-item img {
            width: 100%;
            max-width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            filter: drop-shadow(0 6px 16px rgba(59, 130, 246, 0.12));
            transform: scale(1.08);
        }

        .partner-name {
            font-size: 1.05rem;
            font-weight: 700;
            color: #dbeafe;
            letter-spacing: 0.02em;
            text-align: center;
            line-height: 1.35;
        }
        
        /* 联系我们 */
.contact {
    background: var(--surface-primary);
}
        
        .contact-content {
            width: 100%;
            max-width: 100%;
            padding: 0 2rem;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.6s ease forwards;
        }
        
        .contact-info {
            display: none;
        }
        
        .contact-info h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 30px;
            color: #3b82f6;
        }
        
        .info-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .info-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }
        
        .info-icon {
            width: 40px;
            height: 40px;
            background: rgba(59, 130, 246, 0.3);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            margin-right: 15px;
            flex-shrink: 0;
        }
        
        .info-content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 5px;
        }
        
        .info-content p {
            font-size: 0.875rem;
            opacity: 0.8;
            line-height: 1.5;
        }
        
        .email-link {
            color: #3b82f6;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .email-link:hover {
            color: #60a5fa;
            text-decoration: underline;
        }
        
        .campuses {
            margin-top: 40px;
        }
        
        .campuses h4 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 20px;
            color: #3b82f6;
        }
        
        .campus-item {
            background: rgba(59, 130, 246, 0.2);
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 15px;
            transition: all 0.3s ease;
        }
        
        .campus-item:hover {
            background: rgba(59, 130, 246, 0.3);
            transform: translateY(-5px);
        }
        
        .campus-item h5 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 5px;
        }
        
        .campus-item p {
            font-size: 0.875rem;
            opacity: 0.7;
        }
        
        .map-section {
            display: none;
        }
        
        .map-section h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 30px;
            color: #3b82f6;
        }
        
        .map-container {
            position: relative;
            width: 100%;
            height: 250px;
            background: rgba(0, 0, 0, 0.5);
            border-radius: 12px;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .map-placeholder {
            text-align: center;
            padding: 40px;
        }
        
        .map-placeholder svg {
            width: 64px;
            height: 64px;
            fill: rgba(15, 52, 96, 0.5);
            margin-bottom: 20px;
        }
        
        .map-placeholder p {
            font-size: 1rem;
            opacity: 0.8;
        }
        
        .contact-form {
            margin-top: 30px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
        
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 8px;
            color: #ffffff;
            font-size: 0.875rem;
            transition: all 0.3s ease;
        }
        
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
        }
        
        .form-group textarea {
            resize: vertical;
            min-height: 120px;
        }
        
        .submit-btn {
            width: 100%;
            padding: 12px 24px;
            background: linear-gradient(45deg, #3b82f6, #60a5fa);
            border: none;
            border-radius: 8px;
            color: #ffffff;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .submit-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, #60a5fa, #3b82f6);
            transition: left 0.5s ease;
            z-index: 0;
        }
        
        .submit-btn:hover::before {
            left: 0;
        }
        
        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
        }
        
        .submit-btn span {
            position: relative;
            z-index: 1;
        }
        
        .feedback-form {
            width: 100%;
            max-width: 100%;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 20px;
            padding: 40px;
        }

        .feedback-form form > div[style*="grid-template-columns"] {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        @media (max-width: 768px) {
            .feedback-form form > div[style*="grid-template-columns"] {
                grid-template-columns: 1fr;
                gap: 15px;
            }
        }

        .feedback-form input:focus,
        .feedback-form textarea:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
        }
        
        .feedback-form h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 30px;
            color: #3b82f6;
        }
        
        /* 版权信息 width如果关于更多跳转视频网站上线需要注释掉*/
        .footer-bottom {
            width: 100%;
            text-align: right;
            font-size: 0.75rem;
            opacity: 0.8;
            padding: 0;
            margin: 0;
        }
        
        /* 产品类别标题 */
        .category-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 40px;
            color: #3b82f6;
            position: relative;
            display: inline-block;
        }
        
        .category-title::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, #3b82f6, #60a5fa);
            border-radius: 2px;
        }
        
        .product-category {
            margin-bottom: 60px;
        }
        
        /* Footer */
.footer {
    background: var(--surface-secondary);
    padding: 40px 0 20px;
}
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .footer-social {
            text-align: left;
            margin-bottom: 0;
        }
        
        .footer-social h4 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: #ffffff;
        }

        .social-icons {
            display: flex;
            gap: 14px;
        }

        .social-icon {
            width: 52px;
            height: 52px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: inset 0 0 0 1px rgba(147, 197, 253, 0.18);
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .social-icon:hover {
            background: #3b82f6;
            transform: translateY(-3px);
        }
        
        .social-icon svg {
            width: 24px;
            height: 24px;
            fill: #ffffff;
        }
        
        /* 返回顶部按钮 */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 44px;
            height: 44px;
            background: rgba(59, 130, 246, 0.8);
            border: none;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
        }
        
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        
        .back-to-top:hover {
            background: #3b82f6;
            transform: translateY(-3px);
        }
        
        .back-to-top svg {
            width: 24px;
            height: 24px;
            fill: #ffffff;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .navbar-container {
                height: 60px;
            }
            
            .nav-links {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: var(--surface-nav);
                flex-direction: column;
                align-items: center;
                padding: 20px 0;
                gap: 15px;
                transform: translateY(-100%);
                transition: transform 0.3s ease;
                z-index: 999;
                display: none; /* 取消手机端的导航栏不再显示 */
            }
            
            .nav-right {
                gap: 10px;
            }
            
            .lang-toggle {
                padding: 4px 8px;
                font-size: 0.75rem;
            }
            
            .nav-links.active {
                transform: translateY(0);
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            section {
                padding: 60px 0;
            }
            
            .section-title {
                margin-bottom: 60px;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                width: 200px;
                text-align: center;
            }
            
            .about-content,
            .products-grid,
            .tech-content {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .contact-content {
                padding: 0 1rem;
            }

            .feedback-form {
                padding: 24px;
            }
            
            .core-data {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            
            .projects-grid {
                grid-template-columns: 1fr;
            }
            
            .product-content {
                grid-template-columns: 1fr;
            }
            
            .tech-highlights {
                grid-template-columns: 1fr;
            }
            
            .scenario-cards {
                grid-template-columns: 1fr;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            
            .footer-info {
                max-width: 100%;
            }
            
            .contact-item {
                justify-content: center;
            }
            
            .social-icons {
                justify-content: center;
                gap: 12px;
            }
            
            .social-icon {
                width: 32px;
                height: 32px;
            }
            
            .social-icon svg {
                width: 16px;
                height: 16px;
            }
            
            .footer-social h4 {
                font-size: 0.875rem;
                margin-bottom: 12px;
            }
            
            /* 移除手机端无人导航系统控制器架构中的竖线 */
            .diagram-connector {
                display: none;
            }
            
            /* 解决无人导航系统控制器架构和应用场景模块在手机端右边突出的问题 */
            .architecture-diagram {
                padding: 15px;
                max-width: 100%;
                box-sizing: border-box;
                width: 100%;
                overflow: hidden;
            }
            
            .diagram-container {
                max-width: 100%;
                width: 100%;
            }
            
            .diagram-layer {
                flex-wrap: wrap;
                gap: 10px;
                justify-content: center;
            }
            
            .diagram-box {
                min-width: 80px;
                padding: 12px 8px;
                flex: 1;
                max-width: 100px;
            }
            
            .diagram-box h4 {
                font-size: 0.75rem;
            }
            
            .diagram-box p {
                font-size: 0.625rem;
            }
            
            .application-scenarios {
                max-width: 100%;
                width: 100%;
                box-sizing: border-box;
            }
            
            .scenario-cards {
                grid-template-columns: 1fr;
                gap: 15px;
                width: 100%;
            }
            
            .scenario-card {
                padding: 15px;
                max-width: 100%;
                box-sizing: border-box;
                width: 100%;
            }
            
            /* 删除手机端导航栏按钮 */
            .mobile-menu-btn {
                display: none !important;
            }
            
            /* 修复手机端最底部logo太长突出的问题 */
            .client-logos {
                margin-top: 40px;
            }
            
            .client-logos h3 {
                margin-bottom: 20px;
                font-size: 1rem;
            }
            
            .logos-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 15px;
                max-width: 100%;
                box-sizing: border-box;
            }

            .partners-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .logo-item {
                padding: 15px;
                text-align: center;
            }
            
            .logo-item p {
                font-size: 0.875rem;
            }

            .logo-item img {
                max-width: 120px;
                height: 36px;
            }

            .partner-card {
                min-height: 128px;
                gap: 10px;
                padding: 18px 12px;
            }

            .partner-logo-circle {
                width: 92px;
                height: 92px;
                padding: 0;
            }

            .partner-name {
                font-size: 0.95rem;
            }
            
            /* 修复手机端最底部公司名称太长突出的问题 */
            .footer-content {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            
            .footer-social {
                text-align: center;
            }

            .footer-social h4 {
                font-size: 1.15rem;
                margin-bottom: 14px;
            }

            .social-icons {
                gap: 12px;
            }

            .social-icon {
                width: 46px;
                height: 46px;
            }

            .social-icon svg {
                width: 22px;
                height: 22px;
            }
            
            .footer-bottom {
                text-align: center;
                max-width: 100%;
                box-sizing: border-box;
                padding: 0 20px;
                font-size: 0.625rem;
            }
        }
        /* 品牌标题样式 */
.title_box-Kzjfi0 {
            text-align: center;
            padding: 60px 20px;
            background: var(--surface-secondary);
            animation: fadeInUp 0.8s ease-out;
        }
        
        .title1-O5xXmj {
            display: flex;
            font-size: 120px; /* 基础字体大小 */
            font-weight: 700;
            line-height: 1;
            letter-spacing: -0.02em;
            justify-content: center;
            max-width: 100%;
            overflow: hidden;
            box-sizing: border-box;
        }
        
        /* 每个字母的样式 */
        .title1-O5xXmj span {
            position: relative;
            display: inline-block;
            transition: transform 0.3s ease;
            cursor: default;
        }
        
        /* 利用 ::before 伪元素显示放大的首字母 */
        .title1-O5xXmj span::before {
            content: attr(data-first-char); /* 从 data 属性获取字母 */
            font-size: 180px; /* 首字母更大 */
            font-weight: 800;
            display: block;
            line-height: 0.8;
        }
        
        /* 品牌色渐变 - 每个字母不同颜色 */
        .brand1::before { color: #FF6B6B; }  /* ?? */  /* 红色 */
        .brand2::before { color: #4ECDC4; }  /* ?? */  /* 青色 */
        .brand3::before { color: #45B7D1; }  /* ?? */  /* 蓝色 */
        .brand4::before { color: #96CEB4; }  /* ?? */  /* 绿色 */
        
        /* 副标题效果 */
        .title2-gvoMN4 {
            font-size: 48px;
            font-weight: 600;
            color: #1a1a1a;
            margin-top: 20px;
            background: linear-gradient(90deg, #333 0%, #666 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        /* 悬停动画 */
        .title1-O5xXmj span:hover {
            transform: translateY(-10px) scale(1.1);
        }
        
        /* 入场动画 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* 响应式适配 */
        @media (max-width: 768px) {
            .title1-O5xXmj {
                font-size: 48px;
                letter-spacing: -0.05em;
            }
            .title1-O5xXmj span::before {
                font-size: 72px;
            }
            .title2-gvoMN4 {
                font-size: 24px;
            }
        }
        
        /* 更小屏幕的适配 */
        @media (max-width: 480px) {
            .title1-O5xXmj {
                font-size: 36px;
            }
            .title1-O5xXmj span::before {
                font-size: 54px;
            }
            .title2-gvoMN4 {
                font-size: 20px;
            }
        }

        .mobile-back-home {
            display: none;
        }