:root {
            --primary-color: #1a365d;
            --secondary-color: #2d9cdb;
            --accent-color: #27ae60;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.6;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
        }
        a {
            text-decoration: none;
            color: var(--secondary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: var(--shadow);
            padding: 1rem 0;
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--primary-color) !important;
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            color: var(--dark-color) !important;
            margin: 0 0.5rem;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .hero {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(45, 156, 219, 0.8)), url('https://images.unsplash.com/photo-1518709268805-4e9042af2176?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
            text-align: center;
        }
        .hero h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        .section {
            padding: 5rem 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            border-radius: 2px;
        }
        .card {
            border: none;
            border-radius: 12px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
        }
        .card-img-top {
            border-top-left-radius: 12px;
            border-top-right-radius: 12px;
            height: 220px;
            object-fit: cover;
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 1.8rem;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: var(--primary-color);
            transform: scale(1.05);
        }
        .btn-outline-primary {
            border-color: var(--secondary-color);
            color: var(--secondary-color);
            border-radius: 50px;
            padding: 0.8rem 2rem;
            font-weight: 600;
        }
        .btn-outline-primary:hover {
            background-color: var(--secondary-color);
            color: white;
        }
        .contact-info li {
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }
        .contact-info i {
            color: var(--secondary-color);
            margin-right: 10px;
            width: 24px;
        }
        .footer {
            background-color: var(--primary-color);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer a {
            color: #ddd;
        }
        .footer a:hover {
            color: white;
        }
        .friendlink {
            background-color: #f1f8ff;
            padding: 3rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            box-shadow: var(--shadow);
            color: var(--dark-color);
            font-weight: 500;
            transition: var(--transition);
        }
        .flink:hover {
            background: var(--secondary-color);
            color: white;
            transform: translateY(-5px);
        }
        .map-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .testimonial-item {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        .testimonial-item img {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 1rem;
        }
        .stats-box {
            text-align: center;
            padding: 2rem;
            background: white;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .stats-box h3 {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 0.5rem;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .section {
                padding: 3rem 0;
            }
            .navbar-nav {
                text-align: center;
            }
        }