:root {
            --primary: #1a56db;
            --secondary: #7e3af2;
            --accent: #0694a2;
            --light: #f3f4f6;
            --dark: #111928;
            --gray: #6b7280;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding-top: 1rem;
            padding-bottom: 1rem;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-link {
            font-weight: 600;
            color: var(--dark) !important;
            margin: 0 0.5rem;
            padding: 0.5rem 1rem !important;
            border-radius: 0.375rem;
            transition: all 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            background-color: rgba(26, 86, 219, 0.1);
            color: var(--primary) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(26, 86, 219, 0.9) 0%, rgba(126, 58, 242, 0.85) 100%), url('https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }
        .card-hover {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: none;
            border-radius: 1rem;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
        }
        .btn-gradient {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border: none;
            color: white;
            padding: 0.75rem 2rem;
            border-radius: 0.5rem;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-gradient:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(26, 86, 219, 0.3);
            color: white;
        }
        .process-step {
            position: relative;
            padding-left: 3.5rem;
            margin-bottom: 3rem;
        }
        .process-step-number {
            position: absolute;
            left: 0;
            top: 0;
            width: 2.5rem;
            height: 2.5rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: all 0.3s;
            max-height: 60px;
        }
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
            transform: scale(1.05);
        }
        .testimonial-card {
            background-color: white;
            border-radius: 1rem;
            padding: 2rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            height: 100%;
            border-left: 4px solid var(--primary);
        }
        .testimonial-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
            border: 3px solid rgba(26, 86, 219, 0.2);
        }
        footer {
            background-color: var(--dark);
            color: #ccc;
            padding-top: 4rem;
            padding-bottom: 2rem;
        }
        footer a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
        }
        .footer-title {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.75rem;
        }
        .footer-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }
        .friendlink {
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 0.5rem;
            padding: 1.5rem;
            margin-top: 3rem;
        }
        .flink {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.08);
            color: #aaa;
            padding: 0.5rem 1.2rem;
            margin: 0.3rem;
            border-radius: 2rem;
            text-decoration: none;
            font-size: 0.9rem;
            transition: all 0.3s;
        }
        .flink:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: white;
            transform: translateY(-2px);
        }
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            box-shadow: 0 5px 15px rgba(26, 86, 219, 0.4);
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            transform: translateY(-5px);
            color: white;
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
        }
        .img-hover-zoom {
            overflow: hidden;
            border-radius: 0.75rem;
        }
        .img-hover-zoom img {
            transition: transform 0.5s ease;
        }
        .img-hover-zoom:hover img {
            transform: scale(1.05);
        }