:root {
            --primary: #1a56db;
            --secondary: #7e3af2;
            --dark: #1f2d3d;
            --light: #f8f9fa;
            --success: #0e9f6e;
            --warning: #f59e0b;
        }
        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: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding-top: 0.8rem;
            padding-bottom: 0.8rem;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary);
        }
        .nav-link {
            font-weight: 600;
            padding: 0.5rem 1.2rem !important;
            color: var(--dark);
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .hero-section {
            background: linear-gradient(135deg, #1a56db 0%, #3b82f6 100%);
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
        }
        .hero-section .lead {
            font-size: 1.3rem;
            opacity: 0.9;
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            border-radius: 2px;
        }
        .service-card {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: all 0.4s ease;
            height: 100%;
            border: 1px solid #eee;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(26, 86, 219, 0.15);
            border-color: var(--primary);
        }
        .icon-wrapper {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 2rem;
            color: white;
            font-size: 2rem;
        }
        .process-step {
            position: relative;
            text-align: center;
            padding: 2rem;
        }
        .step-number {
            width: 60px;
            height: 60px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 auto 1.5rem;
            position: relative;
            z-index: 2;
        }
        .process-connector {
            position: absolute;
            top: 30px;
            left: 50%;
            width: 100%;
            height: 2px;
            background: #e5e7eb;
            z-index: 1;
        }
        @media (max-width: 768px) {
            .process-connector {
                display: none;
            }
        }
        .portfolio-item {
            border-radius: 12px;
            overflow: hidden;
            position: relative;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: transform 0.4s;
        }
        .portfolio-item:hover {
            transform: scale(1.03);
        }
        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to top, rgba(26, 86, 219, 0.9), transparent);
            opacity: 0;
            transition: opacity 0.4s;
            display: flex;
            align-items: flex-end;
            padding: 2rem;
        }
        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }
        .btn-primary {
            background: linear-gradient(to right, var(--primary), var(--secondary));
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(26, 86, 219, 0.3);
        }
        .footer {
            background: var(--dark);
            color: #b0b7c3;
            padding-top: 4rem;
        }
        .footer h5 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-link {
            color: #b0b7c3;
            text-decoration: none;
            display: block;
            margin-bottom: 0.8rem;
            transition: color 0.3s;
        }
        .footer-link:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            border-top: 1px solid #2d3748;
            padding: 1.5rem 0;
            margin-top: 3rem;
        }
        .flink {
            background: white;
            border-radius: 8px;
            padding: 1rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--dark);
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
            border: 1px solid #e5e7eb;
            height: 100%;
        }
        .flink:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
            border-color: var(--primary);
        }
        .contact-info {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            height: 100%;
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            background: rgba(26, 86, 219, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.3rem;
            margin-bottom: 1rem;
        }
        .form-control {
            border-radius: 8px;
            padding: 0.8rem 1rem;
            border: 1px solid #d1d5db;
            transition: all 0.3s;
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.2);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary);
            transform: translateY(-5px);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 6rem 0 4rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }