/* 全局重置与基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Inter", "微软雅黑", sans-serif;
        }
        :root {
            /* 主题色配置，方便统一修改 */
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #64748b;
            --light: #f8fafc;
            --dark: #1e293b;
            --success: #10b981;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .section {
            padding: 5rem 0;
        }
        .section-title {
            text-align: center;
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 1rem;
        }
        .section-desc {
            text-align: center;
            color: var(--secondary);
            max-width: 600px;
            margin: 0 auto 3rem;
            font-size: 1.1rem;
        }
        .btn {
            display: inline-block;
            padding: 0.8rem 2rem;
            border-radius: 0.5rem;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 1rem;
        }
        .btn-primary {
            background-color: var(--primary);
            color: white;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background-color: var(--primary);
            color: white;
        }

        /* 导航栏 */
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 999;
        }
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo i {
            font-size: 1.8rem;
        }
        .nav-links {
            display: flex;
            gap: 2rem;
        }
        .nav-links a {
            color: var(--dark);
            font-weight: 500;
            transition: color 0.3s ease;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark);
        }

        /* 英雄区（首屏） */
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 8rem 0;
            text-align: center;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.25rem;
            margin-bottom: 2rem;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-btns {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* 服务板块 */
        .services {
            background-color: var(--light);
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .service-card {
            background-color: white;
            padding: 2rem;
            border-radius: 0.75rem;
            box-shadow: var(--shadow);
            transition: transform 0.3s ease;
        }
        .service-card:hover {
            transform: translateY(-8px);
        }
        .service-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
        }
        .service-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--dark);
        }
        .service-card p {
            color: var(--secondary);
            line-height: 1.6;
        }

        /* 技术栈板块 */
        .tech-stack {
            background-color: white;
        }
        .tech-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 2rem;
            text-align: center;
        }
        .tech-item {
            padding: 1.5rem;
            background-color: var(--light);
            border-radius: 0.5rem;
        }
        .tech-item i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }
        .tech-item span {
            font-weight: 600;
            color: var(--dark);
        }

        /* 案例展示 */
        .cases {
            background-color: var(--light);
        }
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
        }
        .case-card {
            background-color: white;
            border-radius: 0.75rem;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .case-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .case-content {
            padding: 1.5rem;
        }
        .case-content h3 {
            font-size: 1.25rem;
            margin-bottom: 0.75rem;
            color: var(--dark);
        }
        .case-content p {
            color: var(--secondary);
            margin-bottom: 1rem;
            line-height: 1.5;
        }

        /* 合作流程 */
        .process {
            background-color: white;
        }
        .process-steps {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2rem;
            position: relative;
        }
        .process-steps::before {
            content: "";
            position: absolute;
            top: 50%;
            left: 5%;
            right: 5%;
            height: 2px;
            background-color: var(--primary);
            z-index: 1;
        }
        .process-step {
            background-color: white;
            width: 200px;
            text-align: center;
            padding: 1.5rem;
            border-radius: 0.5rem;
            box-shadow: var(--shadow);
            position: relative;
            z-index: 2;
        }
        .process-step .step-number {
            width: 40px;
            height: 40px;
            background-color: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 1rem;
        }
        .process-step h4 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: var(--dark);
        }
        .process-step p {
            font-size: 0.9rem;
            color: var(--secondary);
        }

        /* 客户评价 */
        .testimonials {
            background-color: var(--primary);
            color: white;
        }
        .testimonials .section-title,
        .testimonials .section-desc {
            color: white;
        }
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .testimonial-card {
            background-color: rgba(255, 255, 255, 0.1);
            padding: 2rem;
            border-radius: 0.75rem;
        }
        .testimonial-card p {
            font-style: italic;
            margin-bottom: 1.5rem;
            line-height: 1.6;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .author-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid white;
        }
        .author-info h5 {
            font-size: 1.1rem;
            font-weight: 600;
        }
        .author-info span {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        /* 联系板块 */
        .contact {
            background-color: white;
        }
        .contact-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .contact-info h3 {
            font-size: 2rem;
            margin-bottom: 2rem;
            color: var(--dark);
        }
        .contact-item {
            display: flex;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
            align-items: flex-start;
        }
        .contact-item i {
            font-size: 1.5rem;
            color: var(--primary);
            margin-top: 0.25rem;
        }
        .contact-item h4 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: var(--dark);
        }
        .contact-item p {
            color: var(--secondary);
        }
        .contact-form {
            background-color: var(--light);
            padding: 2rem;
            border-radius: 0.75rem;
            box-shadow: var(--shadow);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--dark);
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #e2e8f0;
            border-radius: 0.5rem;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }

        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: white;
            padding: 4rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }
        .footer-col h4 {
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.75rem;
        }
        .footer-col h4::after {
            content: "";
            position: absolute;
            left: 40%;
            bottom: 0;
            width: 50px;
            height: 2px;
            background-color: var(--primary);
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 0.75rem;
        }
        .footer-col ul li a {
            color: #cbd5e1;
            transition: color 0.3s ease;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        .footer-col .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }
        .footer-col .social-links a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background-color 0.3s ease;
        }
        .footer-col .social-links a:hover {
            background-color: var(--primary);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #cbd5e1;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: white;
                padding: 1rem 2rem;
                box-shadow: var(--shadow);
            }
            .nav-links.active {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .process-steps {
                flex-direction: column;
                align-items: center;
            }
            .process-steps::before {
                display: none;
            }
            .contact-wrapper {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 2rem;
            }
        }