:root {
            --primary-color: #1a5f7a;
            --secondary-color: #57cc99;
            --accent-color: #ffd166;
            --dark-color: #2d3748;
            --light-color: #f8f9fa;
            --gradient-primary: linear-gradient(135deg, #1a5f7a 0%, #2a9d8f 100%);
            --gradient-secondary: linear-gradient(135deg, #ffd166 0%, #ff9a3c 100%);
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', system-ui, -apple-system, sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            padding: 0.5rem 1.2rem;
            transition: all 0.3s ease;
        }
        .navbar-nav .nav-link:hover {
            color: var(--secondary-color);
            transform: translateY(-2px);
        }
        .hero-section {
            background: var(--gradient-primary);
            color: white;
            padding: 120px 0 100px;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            opacity: 0.1;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.2);
        }
        .service-card {
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            border: none;
            border-radius: 15px;
            overflow: hidden;
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.15);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background: var(--gradient-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: white;
            font-size: 2rem;
        }
        .counter-box {
            background: var(--gradient-primary);
            color: white;
            border-radius: 15px;
            padding: 2.5rem 1.5rem;
            text-align: center;
            transition: transform 0.3s ease;
        }
        .counter-box:hover {
            transform: scale(1.05);
        }
        .counter {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
        }
        .team-card {
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s ease;
            border: none;
        }
        .team-card:hover {
            transform: translateY(-10px);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
        }
        .friendlink-container {
            background: var(--light-color);
            border-radius: 15px;
            padding: 2rem;
        }
        .flink {
            display: inline-flex;
            align-items: center;
            padding: 0.75rem 1.5rem;
            background: white;
            border-radius: 50px;
            margin: 0.5rem;
            text-decoration: none;
            color: var(--dark-color);
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }
        .flink:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            border-color: var(--secondary-color);
            color: var(--primary-color);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 100px 0 60px;
            }
            .counter {
                font-size: 2.2rem;
            }
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeInUp 0.8s ease-out;
        }
        .footer {
            background: var(--dark-color);
            color: white;
            padding-top: 3rem;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: var(--secondary-color);
        }
        .contact-info {
            background: var(--gradient-primary);
            color: white;
            border-radius: 15px;
            padding: 2.5rem;
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            background: rgba(255,255,255,0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
        }
        .form-control:focus {
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 0.25rem rgba(87, 204, 153, 0.25);
        }
        .btn-primary {
            background: var(--gradient-primary);
            border: none;
            padding: 0.75rem 2rem;
            font-weight: 600;
            transition: transform 0.3s ease;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(26, 95, 122, 0.3);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--gradient-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 999;
            opacity: 0;
            transition: opacity 0.3s ease, transform 0.3s ease;
        }
        .back-to-top.show {
            opacity: 1;
        }
        .back-to-top:hover {
            transform: translateY(-5px);
        }