/* CSS变量定义 */
        :root {
            --primary-color: #006eff;
            --secondary-color: #ff6b35;
            --text-dark: #1a1a1a;
            --text-light: #666666;
            --bg-light: #f8f9fa;
            --white: #ffffff;
            --border-color: #e1e5e9;
            --success-color: #28a745;
            --warning-color: #ffc107;
        }

        /* 全局重置和基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background-color: var(--white);
        }

        /* 容器样式 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 头部样式 */
        header {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: var(--white);
            padding: 1rem 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            font-size: 1.5rem;
            font-weight: bold;
        }

        .logo::before {
            content: "☁";
            font-size: 2rem;
            margin-right: 0.5rem;
            filter: brightness(0) invert(1);
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }

        .nav-links a {
            color: var(--white);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
        }

        .nav-links a:hover {
            opacity: 0.8;
            transform: translateY(-1px);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--white);
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        /* 主要内容区域 */
        main {
            margin-top: 80px;
        }

        /* 通用区块样式 */
        .section {
            padding: 4rem 0;
        }

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            font-weight: bold;
            margin-bottom: 1.5rem;
            color: var(--text-dark);
        }

        .section-subtitle {
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-light);
            margin-bottom: 3rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 英雄区块 */
        .hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: var(--white);
            text-align: center;
            padding: 6rem 0 4rem;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
            opacity: 0.3;
        }

        .hero-content {
            position: relative;
            z-index: 1;
        }

        .hero h1 {
            font-size: 3.5rem;
            font-weight: bold;
            margin-bottom: 1rem;
            line-height: 1.2;
        }

        .hero p {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.9;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-block;
            padding: 1rem 2rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
            outline: none;
        }

        .btn-primary {
            background: var(--white);
            color: var(--primary-color);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        .btn-secondary {
            background: transparent;
            color: var(--white);
            border: 2px solid var(--white);
        }

        .btn-secondary:hover {
            background: var(--white);
            color: var(--primary-color);
            transform: translateY(-2px);
        }

        /* 腾讯云服务区块 */
        .tencent-services {
            background: var(--bg-light);
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .service-card {
            background: var(--white);
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            text-align: center;
            transition: all 0.3s ease;
            border: 1px solid var(--border-color);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 1.5rem;
            color: var(--white);
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }

        .service-card p {
            color: var(--text-light);
            line-height: 1.6;
        }

        /* 优势区块 */
        .advantages {
            background: var(--white);
        }

        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .advantage-item {
            text-align: center;
            padding: 2rem;
        }

        .advantage-number {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: bold;
            margin: 0 auto 1rem;
        }

        .advantage-item h3 {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }

        .advantage-item p {
            color: var(--text-light);
            line-height: 1.6;
        }

        /* 业务服务区块 */
        .business-services {
            background: var(--bg-light);
        }

        .services-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .service-item {
            background: var(--white);
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            border: 1px solid var(--border-color);
        }

        .service-item:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
        }

        .service-item h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .service-item h3::before {
            content: "✓";
            color: var(--success-color);
            font-weight: bold;
            font-size: 1.2rem;
        }

        .service-item ul {
            list-style: none;
            padding-left: 0;
        }

        .service-item li {
            padding: 0.5rem 0;
            color: var(--text-light);
            position: relative;
            padding-left: 1.5rem;
        }

        .service-item li::before {
            content: "•";
            color: var(--primary-color);
            font-weight: bold;
            position: absolute;
            left: 0;
        }

        /* 联系表单区块 */
        .contact-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: var(--white);
        }

        .contact-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .contact-info h2 {
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
        }

        .contact-info p {
            font-size: 1.1rem;
            margin-bottom: 1.5rem;
            opacity: 0.9;
            line-height: 1.7;
        }

        .contact-details {
            margin-top: 2rem;
        }

        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
            font-size: 1rem;
        }

        .contact-item::before {
            content: "📞";
            margin-right: 0.8rem;
            font-size: 1.2rem;
        }

        .contact-item:nth-child(2)::before {
            content: "📧";
        }

        .contact-item:nth-child(3)::before {
            content: "💬";
        }

        .contact-form {
            background: rgba(255, 255, 255, 0.1);
            padding: 2rem;
            border-radius: 12px;
            backdrop-filter: blur(10px);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            opacity: 0.9;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.1);
            color: var(--white);
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--white);
            background: rgba(255, 255, 255, 0.15);
        }

        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }

        .submit-btn {
            background: var(--white);
            color: var(--primary-color);
            padding: 1rem 2rem;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
        }

        /* 页脚 */
        footer {
            background: var(--text-dark);
            color: var(--white);
            text-align: center;
            padding: 2rem 0;
            margin-top: 4rem;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .hero h1 {
                font-size: 2.5rem;
            }

            .hero p {
                font-size: 1.1rem;
            }

            .section-title {
                font-size: 2rem;
            }

            .section {
                padding: 3rem 0;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                max-width: 300px;
                text-align: center;
            }

            .contact-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .services-grid,
            .advantages-grid,
            .services-list {
                grid-template-columns: 1fr;
            }

            main {
                margin-top: 70px;
            }

            header {
                padding: 0.8rem 0;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }

            .hero {
                padding: 4rem 0 2rem;
            }

            .hero h1 {
                font-size: 2rem;
            }

            .service-card,
            .advantage-item,
            .service-item,
            .contact-form {
                padding: 1.5rem;
            }

            .section {
                padding: 2rem 0;
            }
        }

        /* 动画效果 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-in-up {
            animation: fadeInUp 0.6s ease-out;
        }

        /* 滚动条样式 */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }

        ::-webkit-scrollbar-thumb {
            background: var(--primary-color);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--secondary-color);
        }