:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f8f9fa;
    --text-color: #343a40;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background-color: white;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav a {
    text-decoration: none;
    color: var(--primary-color);
}

.hero {
    text-align: center;
    padding: 50px 20px;
}

.cta-button {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: darken(var(--primary-color), 10%);
}

.advantages, .reviews, .faq, .cta {
    padding: 40px 20px;
}

.advantage {
    display: inline-block;
    text-align: center;
    width: 30%;
}

.review {
    margin: 20px 0;
}

.faq-item {
    margin: 20px 0;
}

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