:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #8b5cf6;
            --accent: #06b6d4;
            --dark: #0f172a;
            --darker: #0a1120;
            --light: #f1f5f9;
            --gray: #94a3b8;
            --success: #10b981;
            --danger: #ef4444;
            --card-bg: rgba(30, 41, 59, 0.7);
            --card-border: rgba(255, 255, 255, 0.08);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Noto Sans SC', sans-serif;
        }
        a{
            color:#94a3b8;
            text-decoration: none;
        }
        body {
            background: linear-gradient(135deg, var(--darker), var(--dark));
            color: var(--light);
            min-height: 100vh;
            line-height: 1.6;
            overflow-x: hidden;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 15px 0;
            transition: all 0.3s ease;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .logo-icon {
            background: linear-gradient(120deg, var(--primary), var(--secondary));
            width: 46px;
            height: 46px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
        }
        
        .logo-text {
            font-size: 24px;
            font-weight: 700;
            background: linear-gradient(to right, #60a5fa, #c084fc);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        nav ul {
            display: flex;
            list-style: none;
            gap: 28px;
        }
        
        nav a {
            color: #cbd5e1;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
            padding: 8px 0;
            font-size: 16px;
        }
        
        nav a.active, nav a:hover {
            color: #60a5fa;
        }
        
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #60a5fa;
            transition: width 0.3s ease;
        }
        
        nav a.active::after, nav a:hover::after {
            width: 100%;
        }
        
        .auth-buttons {
            display: flex;
            gap: 15px;
        }
        
        .btn {
            padding: 10px 24px;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-block;
            cursor: pointer;
            border: none;
            font-size: 16px;
        }
        
        .btn-primary {
            background: linear-gradient(90deg, var(--primary), var(--primary-dark));
            color: white;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
        }
        
        .btn-outline {
            background: transparent;
            color: var(--light);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
        }
        
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.05);
        }
        
        .hamburger {
            display: none;
            cursor: pointer;
            font-size: 24px;
            color: var(--light);
        }
        
        /* 页面内容区域 */
        .page {
            padding-top: 100px;
            min-height: calc(100vh - 180px);
           
        }
        
        .page.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        /* 首页样式 */
        .hero {
            text-align: center;
            margin-bottom: 80px;
            padding: 40px 0;
        }
        
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            background: linear-gradient(to right, #93c5fd, #d8b4fe);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }
        
        .hero p {
            font-size: 1.25rem;
            max-width: 800px;
            margin: 0 auto 40px;
            color: #cbd5e1;
        }
        
        .cta-button {
            display: inline-block;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            color: white;
            padding: 16px 42px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
        }
        
        .cta-button:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 30px rgba(139, 92, 246, 0.6);
        }
        
        .apps-section h2, .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 60px;
            color: #e2e8f0;
            position: relative;
        }
        
        .section-title::after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            margin: 15px auto 0;
            border-radius: 2px;
        }
        
        .apps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-bottom: 80px;
        }
        
        .app-card {
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
            backdrop-filter: blur(10px);
            border: 1px solid var(--card-border);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        
        .app-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
            border-color: rgba(96, 165, 250, 0.3);
        }
        
        .card-icon {
            height: 160px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 64px;
        }
        
        .ai-assistant {
            background: linear-gradient(135deg, #3b82f6, #60a5fa);
        }
        
        .chatbot {
            background: linear-gradient(135deg, #8b5cf6, #c084fc);
        }
        
        .recruitment {
            background: linear-gradient(135deg, #ec4899, #f472b6);
        }
        
        .chatpdf {
            background: linear-gradient(135deg, #ef4444, #f87171);
        }
        
        .card-content {
            padding: 25px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        .card-content h3 {
            font-size: 1.8rem;
            margin-bottom: 15px;
        }
        
        .card-content p {
            color: #cbd5e1;
            line-height: 1.6;
            margin-bottom: 20px;
            flex-grow: 1;
        }
        
        .card-button {
            display: inline-block;
            text-align: center;
            padding: 12px 20px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        .ai-assistant .card-button {
            background: rgba(59, 130, 246, 0.2);
            color: #93c5fd;
            border: 1px solid #3b82f6;
        }
        
        .chatbot .card-button {
            background: rgba(139, 92, 246, 0.2);
            color: #c4b5fd;
            border: 1px solid #8b5cf6;
        }
        
        .recruitment .card-button {
            background: rgba(236, 72, 153, 0.2);
            color: #f9a8d4;
            border: 1px solid #ec4899;
        }
        
        .chatpdf .card-button {
            background: rgba(239, 68, 68, 0.2);
            color: #fca5a5;
            border: 1px solid #ef4444;
        }
        
        .card-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            background: rgba(255, 255, 255, 0.1);
        }
        
        .features {
            background: rgba(15, 23, 42, 0.7);
            border-radius: 16px;
            padding: 50px;
            margin: 60px 0;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .feature {
            display: flex;
            gap: 20px;
            padding: 20px;
            border-radius: 12px;
            transition: all 0.3s ease;
        }
        
        .feature:hover {
            background: rgba(30, 41, 59, 0.5);
        }
        
        .feature-icon {
            background: rgba(96, 165, 250, 0.1);
            width: 60px;
            height: 60px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: #60a5fa;
            flex-shrink: 0;
        }
        
        .feature-text h3 {
            font-size: 1.4rem;
            margin-bottom: 10px;
            color: #e2e8f0;
        }
        
        .feature-text p {
            color: #94a3b8;
            line-height: 1.6;
        }
        
        /* 应用中心页面 */
        .app-categories {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        
        .category-btn {
            padding: 12px 24px;
            border-radius: 30px;
            background: rgba(30, 41, 59, 0.7);
            color: var(--light);
            border: 1px solid rgba(255, 255, 255, 0.1);
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .category-btn.active, .category-btn:hover {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            color: white;
            border-color: transparent;
        }
        
        .app-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }
        
        .app-item {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 30px;
            border: 1px solid var(--card-border);
            transition: all 0.3s ease;
        }
        
        .app-item:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }
        
        .app-item h3 {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
            font-size: 1.5rem;
        }
        
        .app-item h3 i {
            color: var(--primary);
            font-size: 1.8rem;
        }
        
        .app-tags {
            display: flex;
            gap: 10px;
            margin: 15px 0;
            flex-wrap: wrap;
        }
        
        .tag {
            background: rgba(96, 165, 250, 0.15);
            color: #93c5fd;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
        }
        
        /* 解决方案页面 */
        .industries {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
            margin-bottom: 50px;
        }
        
        .industry-card {
            width: 100%;
            max-width: 350px;
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--card-border);
            transition: all 0.3s ease;
        }
        
        .industry-card:hover {
            transform: translateY(-5px);
            border-color: var(--accent);
        }
        
        .industry-img {
            height: 180px;
            background-size: cover;
            background-position: center;
        }
        
        .industry-content {
            padding: 25px;
        }
        
        .industry-content h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        /* 企业服务页面 */
        .services {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }
        
        .service-card {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 40px 30px;
            text-align: center;
            border: 1px solid var(--card-border);
            transition: all 0.3s ease;
        }
        
        .service-card:hover {
            transform: translateY(-10px);
            border-color: var(--primary);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
        }
        
        .service-card i {
            font-size: 48px;
            color: var(--primary);
            margin-bottom: 25px;
        }
        
        .service-card h3 {
            font-size: 1.6rem;
            margin-bottom: 15px;
        }
        
        /* 联系我们页面 */
        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            margin-bottom: 60px;
        }
        
        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        
        .contact-card {
            display: flex;
            align-items: flex-start;
            gap: 20px;
        }
        
        .contact-icon {
            width: 60px;
            height: 60px;
            background: rgba(96, 165, 250, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
        }
        
        .contact-text h3 {
            font-size: 1.4rem;
            margin-bottom: 8px;
        }
        
        .contact-form {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--card-border);
        }
        
        .form-group {
            margin-bottom: 25px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }
        
        .form-control {
            width: 100%;
            padding: 14px 18px;
            border-radius: 8px;
            background: rgba(15, 23, 42, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--light);
            font-size: 16px;
            transition: all 0.3s ease;
        }
        
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
        }
        
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        
        .map-container {
            height: 400px;
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            margin-top: 40px;
            border: 1px solid var(--card-border);
        }
        
        .map-placeholder {
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, #0f172a, #1e293b);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gray);
            font-size: 1.2rem;
        }
        
        /* 页脚 */
        footer {
            background: rgba(15, 23, 42, 0.95);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 60px;
        }
        
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-col h3 {
            font-size: 1.4rem;
            margin-bottom: 25px;
            color: #e2e8f0;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-col h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--primary);
        }
        
        .footer-col ul {
            list-style: none;
        }
        
        .footer-col ul li {
            margin-bottom: 15px;
        }
        
        .footer-col ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .footer-col ul li a:hover {
            color: var(--primary);
            transform: translateX(5px);
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            color: var(--light);
            transition: all 0.3s ease;
        }
        
        .social-links a:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            color: #94a3b8;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .contact-container {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            
            nav {
                order: 3;
                width: 100%;
                margin-top: 20px;
                display: none;
            }
            
            nav.active {
                display: block;
            }
            
            nav ul {
                flex-direction: column;
                gap: 10px;
            }
            
            .hamburger {
                display: block;
            }
            
            .auth-buttons {
                margin-left: auto;
                margin-right: 20px;
                display:none;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
        }
        
        @media (max-width: 576px) {
            .hero h1 {
                font-size: 2rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .cta-button {
                padding: 14px 32px;
                font-size: 1rem;
            }
            
            .features {
                padding: 30px 20px;
            }
            
            .contact-form {
                padding: 30px 20px;
            }
            
            .footer-container {
                grid-template-columns: 1fr;
            }
        }