:root {
            --primary-color: #0d6efd;
            --secondary-color: #6c757d;
            --accent-color: #20c997;
            --dark-color: #212529;
            --light-color: #f8f9fa;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
            color: var(--dark-color);
            overflow-x: hidden;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95) !important;
            backdrop-filter: blur(10px);
            box-shadow: var(--shadow);
            transition: var(--transition);
            padding-top: 1rem;
            padding-bottom: 1rem;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            margin: 0 0.5rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary-color) !important;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(13, 110, 253, 0.1) 0%, rgba(32, 201, 151, 0.1) 100%);
            padding: 8rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 80%;
            height: 150%;
            background: radial-gradient(circle, rgba(13, 110, 253, 0.05) 0%, transparent 70%);
            z-index: 0;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            color: var(--dark-color);
        }
        .hero-subtitle {
            font-size: 1.3rem;
            color: var(--secondary-color);
            margin-bottom: 2.5rem;
            line-height: 1.6;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.8rem 2.5rem;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #0b5ed7;
            border-color: #0b5ed7;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(13, 110, 253, 0.2);
        }
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            position: relative;
            display: inline-block;
            color: var(--dark-color);
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 60px;
            height: 4px;
            background-color: var(--accent-color);
            border-radius: 2px;
        }
        .section-subtitle {
            color: var(--secondary-color);
            font-size: 1.1rem;
            margin-bottom: 4rem;
            max-width: 700px;
        }
        .feature-card {
            background: white;
            border-radius: 15px;
            padding: 2.5rem 2rem;
            height: 100%;
            transition: var(--transition);
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.05);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
        }
        .feature-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            font-size: 2rem;
            color: white;
        }
        .service-card {
            border-radius: 15px;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow);
            height: 100%;
            background: white;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }
        .service-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        .service-body {
            padding: 2rem;
        }
        .stats-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, #0b5ed7 100%);
            color: white;
            padding: 5rem 0;
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" preserveAspectRatio="none"><path d="M0,0V100H1000V0C800,50 200,50 0,0Z" fill="rgba(255,255,255,0.05)"/></svg>');
            background-size: 100% 100px;
            background-repeat: no-repeat;
            background-position: bottom;
        }
        .stat-item {
            text-align: center;
            padding: 1.5rem;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
            line-height: 1;
        }
        .testimonial-card {
            background: white;
            border-radius: 15px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
            height: 100%;
            position: relative;
        }
        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: 20px;
            left: 25px;
            font-size: 5rem;
            color: rgba(13, 110, 253, 0.1);
            font-family: Georgia, serif;
            line-height: 1;
        }
        .client-logo {
            height: 50px;
            object-fit: contain;
            margin-bottom: 1.5rem;
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 4rem 0;
        }
        .flink {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: white;
            border-radius: 10px;
            padding: 1rem 1.5rem;
            margin: 0.5rem;
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
            border: 1px solid #eee;
            min-height: 70px;
        }
        .flink:hover {
            color: var(--primary-color);
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            border-color: var(--primary-color);
        }
        footer {
            background-color: var(--dark-color);
            color: rgba(255, 255, 255, 0.85);
            padding-top: 5rem;
            padding-bottom: 2rem;
        }
        .footer-title {
            color: white;
            font-weight: 600;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-link {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            margin-bottom: 0.8rem;
            display: block;
            transition: var(--transition);
        }
        .footer-link:hover {
            color: white;
            padding-left: 5px;
        }
        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.1);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: white;
            margin-right: 0.8rem;
            transition: var(--transition);
        }
        .social-icon:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 2rem;
            margin-top: 4rem;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .stat-number {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 6rem 0 4rem;
            }
            .feature-card, .service-card, .testimonial-card {
                margin-bottom: 1.5rem;
            }
        }