:root {
            --primary-color: #1a365d;
            --secondary-color: #e53e3e;
            --accent-color: #38a169;
            --light-color: #f7fafc;
            --dark-color: #2d3748;
            --text-color: #4a5568;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            color: var(--text-color);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            color: var(--primary-color);
            font-weight: 700;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding: 1rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .nav-link {
            color: var(--dark-color) !important;
            font-weight: 600;
            margin: 0 0.5rem;
            transition: color 0.3s;
            position: relative;
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
        }
        .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: var(--secondary-color);
            left: 0;
            bottom: -5px;
            transition: width 0.3s;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1551958219-acbc608c6377?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: white;
            padding: 8rem 0 6rem;
            margin-top: 76px;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
        }
        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border: none;
            padding: 0.8rem 2rem;
            font-weight: 600;
            border-radius: 4px;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #c53030;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }
        section {
            padding: 5rem 0;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-card {
            background: white;
            border-radius: 10px;
            padding: 2.5rem 2rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            height: 100%;
            transition: transform 0.3s, box-shadow 0.3s;
            border-top: 4px solid var(--secondary-color);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
        }
        .feature-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
        }
        .product-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.3s;
            margin-bottom: 2rem;
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .product-img {
            height: 250px;
            width: 100%;
            object-fit: cover;
        }
        .testimonial-card {
            background: var(--light-color);
            border-radius: 10px;
            padding: 2rem;
            margin: 1rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .testimonial-text {
            font-style: italic;
            margin-bottom: 1.5rem;
        }
        .client-name {
            font-weight: 700;
            color: var(--primary-color);
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 4rem 0 2rem;
        }
        .footer-heading {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.8rem;
        }
        .footer-heading::after {
            content: '';
            position: absolute;
            width: 50px;
            height: 3px;
            background: var(--secondary-color);
            bottom: 0;
            left: 0;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            display: block;
            margin-bottom: 0.8rem;
            transition: color 0.3s, padding-left 0.3s;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            margin-right: 10px;
            transition: all 0.3s;
        }
        .social-icons a:hover {
            background: var(--secondary-color);
            transform: translateY(-5px);
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 2rem;
            margin-top: 3rem;
            text-align: center;
            color: rgba(255, 255, 255, 0.7);
        }
        .friendlink {
            background-color: var(--light-color);
            padding: 3rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 6px;
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 500;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
            transition: all 0.3s;
            border: 1px solid rgba(0, 0, 0, 0.05);
        }
        .flink:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            color: var(--secondary-color);
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeInUp 0.8s ease-out;
        }
        @media (max-width: 768px) {
            section {
                padding: 3rem 0;
            }
            .hero-section {
                padding: 5rem 0 3rem;
                text-align: center;
            }
            .footer-heading {
                margin-top: 2rem;
            }
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: #c53030;
            transform: translateY(-5px);
        }