/* 基础样式重置与变量定义 */
        :root {
            --primary-color: #0052cc;
            --secondary-color: #00b8d9;
            --dark-color: #172b4d;
            --light-bg: #f4f5f7;
            --text-color: #333333;
            --text-muted: #6b778c;
            --white: #ffffff;
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-color);
            line-height: 1.6;
            background-color: var(--white);
        }

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

        ul {
            list-style: none;
        }

        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }

        .section-padding {
            padding: 80px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title h2 {
            font-size: 2.2rem;
            color: var(--dark-color);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-title h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 3px;
            background: var(--primary-color);
            margin: 10px auto 0;
            border-radius: 2px;
        }

        .section-title p {
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* 导航栏 */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            z-index: 1000;
            backdrop-filter: blur(5px);
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo {
            font-size: 1.3rem;
            font-weight: bold;
            color: var(--primary-color);
            letter-spacing: 0.5px;
        }

        .nav-links {
            display: flex;
            gap: 25px;
        }

        .nav-links a {
            font-weight: 500;
            color: var(--dark-color);
            transition: var(--transition);
        }

        .nav-links a:hover {
            color: var(--primary-color);
        }

        /* Hero 巨幕 */
        .hero {
            padding-top: 150px;
            padding-bottom: 100px;
            background: linear-gradient(135deg, #0a192f 0%, #172b4d 100%);
            color: var(--white);
            text-align: center;
        }

        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .hero p {
            font-size: 1.25rem;
            color: #a5adba;
            max-width: 800px;
            margin: 0 auto 35px;
        }

        .btn {
            display: inline-block;
            padding: 12px 32px;
            background-color: var(--primary-color);
            color: var(--white);
            border-radius: 4px;
            font-weight: bold;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }

        .btn:hover {
            background-color: #00388b;
            transform: translateY(-2px);
        }

        /* 关于我们 */
        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .about-text p {
            margin-bottom: 15px;
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--light-bg);
            padding: 25px;
            border-radius: 8px;
            text-align: center;
        }

        .stat-card .number {
            font-size: 2rem;
            font-weight: bold;
            color: var(--primary-color);
        }

        /* 服务项目 */
        .services {
            background-color: var(--light-bg);
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: var(--white);
            padding: 35px 25px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: var(--dark-color);
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .solution-card {
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            padding: 30px;
            transition: var(--transition);
        }

        .solution-card:hover {
            border-color: var(--primary-color);
        }

        .solution-card h3 {
            color: var(--primary-color);
            margin-bottom: 10px;
        }

        /* 联系我们 */
        .contact {
            background-color: var(--dark-color);
            color: var(--white);
        }

        .contact .section-title h2 {
            color: var(--white);
        }

        .contact-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .contact-info div {
            margin-bottom: 25px;
        }

        .contact-info h4 {
            font-size: 1.1rem;
            color: var(--secondary-color);
            margin-bottom: 5px;
        }

        .contact-info p {
            color: #a5adba;
        }

        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 12px;
            margin-bottom: 15px;
            border: 1px solid #334e68;
            border-radius: 4px;
            background: #243b53;
            color: var(--white);
        }

        .contact-form input::placeholder,
        .contact-form textarea::placeholder {
            color: #829ab1;
        }

        /* 页脚与备案信息 */
        .footer {
            background-color: #0b132b;
            color: #829ab1;
            padding: 30px 0;
            text-align: center;
            font-size: 0.9rem;
            border-top: 1px solid #1c2d42;
        }

        .footer p {
            margin-bottom: 8px;
        }

        .footer a {
            color: #829ab1;
            transition: var(--transition);
        }

        .footer a:hover {
            color: var(--white);
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2rem;
            }

            .about-content,
            .contact-wrapper {
                grid-template-columns: 1fr;
            }

            .nav-links {
                display: none; /* 简化的移动端响应处理 */
            }
            
            .logo {
                font-size: 1.1rem;
            }
        }