:root {
            --primary: #1a365d;
            --secondary: #2d3748;
            --accent: #d4af37;
            --light-bg: #f8f9fa;
            --dark-bg: #1a202c;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.8;
        }
        .navbar {
            background-color: rgba(26, 54, 93, 0.95);
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: #fff !important;
        }
        .navbar-brand span {
            color: var(--accent);
        }
        .nav-link {
            color: #e2e8f0 !important;
            font-weight: 500;
            margin: 0 8px;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--accent) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            background: var(--accent);
            left: 50%;
            bottom: 0;
            transition: all 0.3s ease;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 80%;
            left: 10%;
        }
        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1556742049-0cfed4f6a45d?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center;
            background-size: cover;
            color: white;
            padding: 180px 0 120px;
        }
        .section-title {
            position: relative;
            padding-bottom: 20px;
            margin-bottom: 50px;
            text-align: center;
            font-weight: 700;
            color: var(--primary);
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--accent);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }
        .card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px 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 35px rgba(0,0,0,0.15);
        }
        .card-icon {
            font-size: 3rem;
            color: var(--accent);
            margin-bottom: 20px;
        }
        .service-card {
            border-top: 5px solid var(--accent);
        }
        .btn-primary {
            background-color: var(--primary);
            border-color: var(--primary);
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            background-color: var(--secondary);
            border-color: var(--secondary);
            transform: scale(1.05);
        }
        .btn-outline-primary {
            color: var(--primary);
            border-color: var(--primary);
            border-radius: 30px;
            padding: 10px 25px;
            font-weight: 600;
        }
        .btn-outline-primary:hover {
            background-color: var(--primary);
            border-color: var(--primary);
        }
        footer {
            background-color: var(--dark-bg);
            color: #cbd5e0;
        }
        .footer-link {
            color: #cbd5e0;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer-link:hover {
            color: var(--accent);
        }
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            color: white;
            margin-right: 10px;
            transition: all 0.3s ease;
        }
        .social-icon:hover {
            background: var(--accent);
            transform: translateY(-3px);
        }
        .friendlink {
            background-color: var(--light-bg);
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 12px 25px;
            margin: 8px;
            border-radius: 8px;
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
            border: 1px solid #e2e8f0;
        }
        .flink:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .contact-info i {
            color: var(--accent);
            width: 30px;
        }
        .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;
            font-size: 1.5rem;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 1000;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--accent);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary);
        }
        .stats-label {
            color: var(--secondary);
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 120px 0 80px;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }