:root {
            --primary-blue: #0a2463;
            --secondary-blue: #3e78b2;
            --accent-teal: #4ecdc4;
            --dark-bg: #1a1a2e;
            --light-bg: #f8f9fa;
            --text-dark: #333333;
            --text-light: #ffffff;
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }
        body {
            font-family: 'Helvetica Neue', 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            overflow-x: hidden;
        }
        .section-padding {
            padding: 6rem 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 3rem 0;
            }
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
            color: var(--text-light);
            padding: 10rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            width: 300%;
            height: 300%;
            top: -100%;
            left: -100%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
            background-size: 50px 50px;
            animation: float 25s linear infinite;
            opacity: 0.3;
        }
        @keyframes float {
            0% { transform: translate(0, 0) rotate(0deg); }
            100% { transform: translate(-50px, -50px) rotate(360deg); }
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            padding: 1rem 0;
        }
        .navbar.scrolled {
            padding: 0.5rem 0;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-blue) !important;
        }
        .nav-link {
            font-weight: 500;
            margin: 0 0.5rem;
            color: var(--text-dark) !important;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-blue) !important;
        }
        .btn-primary {
            background-color: var(--accent-teal);
            border: none;
            padding: 0.75rem 2rem;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #3ab7af;
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(78, 205, 196, 0.3);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--accent-teal), #26a69a);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: white;
            font-size: 1.8rem;
        }
        .service-card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.4s, box-shadow 0.4s;
            height: 100%;
            background: white;
            box-shadow: var(--shadow);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
        }
        .service-card img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .service-card:hover img {
            transform: scale(1.05);
        }
        .stats-section {
            background-color: var(--dark-bg);
            color: white;
            position: relative;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 700;
            color: var(--accent-teal);
            line-height: 1;
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.6;
            transition: all 0.3s;
            max-height: 60px;
        }
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }
        .footer {
            background-color: #0d1b2a;
            color: #e0e1dd;
            padding-top: 4rem;
        }
        .footer a {
            color: #b8c1cc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer a:hover {
            color: var(--accent-teal);
        }
        .copyright {
            border-top: 1px solid #2d3748;
            padding-top: 1.5rem;
            margin-top: 3rem;
        }
        .friendlink {
            background-color: #f1f7fd;
            border-radius: 15px;
            padding: 2rem;
        }
        .flink {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: white;
            border-radius: 10px;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            color: var(--text-dark);
            font-weight: 500;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            transition: all 0.3s;
            text-decoration: none;
        }
        .flink:hover {
            background-color: var(--primary-blue);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(10, 36, 99, 0.2);
        }
        .flink i {
            margin-right: 8px;
        }
        .form-control, .form-select {
            border-radius: 8px;
            border: 1px solid #ced4da;
            padding: 0.75rem 1rem;
        }
        .form-control:focus, .form-select:focus {
            border-color: var(--accent-teal);
            box-shadow: 0 0 0 0.25rem rgba(78, 205, 196, 0.25);
        }
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s, transform 0.8s;
        }
        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-blue);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            z-index: 1000;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
        }
        .back-to-top.show {
            opacity: 0.8;
            visibility: visible;
        }
        .back-to-top:hover {
            opacity: 1;
            background-color: var(--secondary-blue);
        }