* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: #ffffff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    height: 160px;
    width: auto;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: #003d82;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #3fb5e5;
}

.hero {
    background: linear-gradient(135deg, #003d82 0%, #0056b3 50%, #3fb5e5 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
}

.hero h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.2em;
    margin-bottom: 30px;
    opacity: 0.95;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    background-color: white;
    color: #003d82;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.about {
    padding: 80px 20px;
    background-color: #f8f9fa;
}

.about h2 {
    text-align: center;
    color: #003d82;
    font-size: 2.2em;
    margin-bottom: 30px;
}

.about p {
    font-size: 1.1em;
    margin-bottom: 20px;
    text-align: center;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.products {
    padding: 80px 20px;
    background-color: white;
}

.products h2 {
    text-align: center;
    color: #003d82;
    font-size: 2.2em;
    margin-bottom: 50px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.product-card {
    background-color: #f8f9fa;
    padding: 30px;
    border-radius: 8px;
    border-left: 4px solid #3fb5e5;
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(63, 181, 229, 0.2);
}

.product-card h3 {
    color: #003d82;
    margin-bottom: 15px;
    font-size: 1.3em;
}

.product-card p {
    color: #555;
}

.advantages {
    padding: 80px 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.advantages h2 {
    text-align: center;
    color: #003d82;
    font-size: 2.2em;
    margin-bottom: 50px;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.advantage-item {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.advantage-item:hover {
    transform: translateY(-5px);
}

.advantage-item h3 {
    color: #0056b3;
    margin-bottom: 15px;
    font-size: 1.3em;
}

.advantage-item p {
    color: #555;
}

.contact {
    padding: 80px 20px;
    background-color: #003d82;
    color: white;
    text-align: center;
}

.contact h2 {
    font-size: 2.2em;
    margin-bottom: 20px;
}

.contact > p {
    font-size: 1.1em;
    margin-bottom: 40px;
    opacity: 0.95;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-item {
    flex: 1;
    min-width: 200px;
}

.contact-item h3 {
    color: #3fb5e5;
    margin-bottom: 10px;
    font-size: 1.3em;
}

.contact-item p {
    font-size: 1.1em;
}

footer {
    background-color: #001f3f;
    color: white;
    text-align: center;
    padding: 20px;
}

@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        gap: 15px;
    }

    nav .container {
        flex-direction: column;
        gap: 20px;
    }

    .hero h1 {
        font-size: 1.8em;
    }

    .hero p {
        font-size: 1em;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .contact-info {
        flex-direction: column;
        gap: 30px;
    }
}