:root {
            --primary: #1a237e;
            --secondary: #ff6f00;
            --light: #f8f9fa;
            --dark: #212529;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--dark);
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary) !important;
        }
        .hero {
            background: linear-gradient(rgba(26, 35, 126, 0.85), rgba(26, 35, 126, 0.7)), url('https://images.unsplash.com/photo-1497366754035-f200968a6e72?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            color: var(--primary);
        }
        .section-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 60px;
            height: 4px;
            background: var(--secondary);
        }
        .card {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .service-icon, .feature-icon {
            font-size: 2.5rem;
            color: var(--secondary);
            margin-bottom: 20px;
        }
        .btn-primary {
            background-color: var(--primary);
            border-color: var(--primary);
            padding: 10px 30px;
            font-weight: 600;
        }
        .btn-primary:hover {
            background-color: var(--secondary);
            border-color: var(--secondary);
        }
        .contact-info li {
            margin-bottom: 15px;
            font-size: 1.05rem;
        }
        .contact-info i {
            color: var(--secondary);
            width: 30px;
        }
        .friendlink {
            background-color: var(--light);
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 12px 25px;
            margin: 8px;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            color: var(--dark);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        .flink:hover {
            background-color: var(--primary);
            color: white;
            transform: scale(1.05);
        }
        footer {
            background-color: var(--dark);
            color: white;
        }
        footer a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: var(--secondary);
        }
        .img-fluid {
            border-radius: 8px;
        }
        .sticky-top {
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        @media (max-width: 768px) {
            .hero {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }