/* 基础变量与全局重置 */
        :root {
            --primary-color: #0b6bcb;
            --primary-hover: #074e96;
            --accent-color: #00b8d9;
            --dark-color: #0f172a;
            --light-bg: #f8fafc;
            --card-bg: #ffffff;
            --text-main: #334155;
            --text-muted: #64748b;
            --white: #ffffff;
            --border-color: #e2e8f0;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        .section-padding {
            padding: 90px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            color: var(--dark-color);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
            margin: 12px auto 0;
            border-radius: 2px;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 导航栏 */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            z-index: 1000;
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 75px;
        }

        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--dark-color);
            letter-spacing: -0.5px;
        }

        .logo span {
            color: var(--primary-color);
        }

        .nav-links {
            display: flex;
            gap: 30px;
            list-style: none;
        }

        .nav-links a {
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
            font-size: 0.95rem;
        }

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

        /* Hero 品牌巨幕 */
        .hero {
            padding-top: 170px;
            padding-bottom: 110px;
            background: radial-gradient(circle at 80% 20%, #1e293b 0%, var(--dark-color) 100%);
            color: var(--white);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 24px;
            line-height: 1.25;
            letter-spacing: -1px;
        }

        .hero p {
            font-size: 1.2rem;
            color: #94a3b8;
            max-width: 780px;
            margin: 0 auto 40px;
            font-weight: 300;
        }

        .btn {
            display: inline-block;
            padding: 14px 36px;
            background: linear-gradient(135deg, var(--primary-color), #0284c7);
            color: var(--white);
            border-radius: 6px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(11, 107, 203, 0.39);
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(11, 107, 203, 0.55);
        }

        /* 关于我们 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text p {
            margin-bottom: 18px;
            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: 30px 20px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            text-align: center;
        }

        .stat-card .number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 5px;
        }

        .stat-card .label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

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

        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: var(--card-bg);
            padding: 40px 30px;
            border-radius: 10px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
            border-color: var(--primary-color);
        }

        .service-card h3 {
            font-size: 1.25rem;
            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 {
            background: var(--card-bg);
            border-radius: 10px;
            padding: 35px;
            border: 1px solid var(--border-color);
            position: relative;
            transition: var(--transition);
        }

        .solution-card:hover {
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }

        .solution-card h3 {
            color: var(--primary-color);
            font-size: 1.3rem;
            margin-bottom: 12px;
        }

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

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

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

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
        }

        .contact-info div {
            margin-bottom: 30px;
        }

        .contact-info h4 {
            font-size: 1.1rem;
            color: var(--accent-color);
            margin-bottom: 8px;
        }

        .contact-info p {
            color: #94a3b8;
        }

        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 14px;
            margin-bottom: 18px;
            border: 1px solid #334155;
            border-radius: 6px;
            background: #1e293b;
            color: var(--white);
            font-family: inherit;
        }

        .contact-form input:focus,
        .contact-form textarea:focus {
            outline: none;
            border-color: var(--primary-color);
        }

        /* 页脚与备案信息 */
        .footer {
            background-color: #090d16;
            color: #64748b;
            padding: 35px 0;
            text-align: center;
            font-size: 0.9rem;
            border-top: 1px solid #1e293b;
        }

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

        .footer a {
            color: #94a3b8;
            transition: var(--transition);
        }

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

        /* 自适应响应式媒体查询 */
        @media (max-width: 992px) {
            .hero h1 { font-size: 2.4rem; }
            .about-grid, .contact-grid { grid-template-columns: 1fr; }
        }

        @media (max-width: 768px) {
            .nav-links { display: none; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .section-padding { padding: 60px 0; }
        }