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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #10b981;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

.header {
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover {
    color: var(--primary-color);
}

.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 30px;
    color: var(--text-dark);
}

.hero-benefits {
    list-style: none;
    margin-bottom: 40px;
}

.hero-benefits li {
    padding: 12px 0;
    padding-left: 30px;
    position: relative;
    font-size: 18px;
    color: var(--text-gray);
}

.hero-benefits li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
    font-size: 20px;
}

.hero-cta {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 16px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--bg-white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--bg-white);
}

.btn-large {
    padding: 20px 40px;
    font-size: 18px;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.section {
    padding: 80px 0;
}

.section h2 {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 50px;
    color: var(--text-dark);
}

.section-intro {
    text-align: center;
    font-size: 18px;
    color: var(--text-gray);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.benefits {
    background-color: var(--bg-white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.benefit-card {
    background-color: var(--bg-white);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.benefit-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.benefit-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.benefit-card p {
    color: var(--text-gray);
    line-height: 1.8;
}

.composition {
    background-color: var(--bg-light);
}

.composition-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.composition-item {
    background-color: var(--bg-white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.composition-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.composition-item p {
    color: var(--text-gray);
    line-height: 1.8;
}

.composition-note {
    text-align: center;
    color: var(--text-gray);
    font-style: italic;
    max-width: 800px;
    margin: 0 auto;
}

.usage {
    background-color: var(--bg-white);
}

.usage-content {
    max-width: 900px;
    margin: 0 auto;
}

.usage-content p {
    font-size: 18px;
    margin-bottom: 30px;
    color: var(--text-gray);
}

.usage-steps {
    list-style: none;
    margin-bottom: 30px;
}

.usage-steps li {
    padding: 20px;
    margin-bottom: 15px;
    background-color: var(--bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.usage-steps strong {
    color: var(--text-dark);
}

.usage-warning {
    background-color: #fef3c7;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid #f59e0b;
}

.pricing {
    background-color: var(--bg-light);
}

.pricing-content {
    max-width: 900px;
    margin: 0 auto;
}

.pricing-content p {
    font-size: 18px;
    margin-bottom: 25px;
    color: var(--text-gray);
}

.pricing-factors {
    margin: 30px 0;
    padding-left: 30px;
}

.pricing-factors li {
    margin-bottom: 12px;
    color: var(--text-gray);
    font-size: 17px;
}

.pricing-highlight {
    background-color: var(--bg-white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-top: 40px;
}

.pricing-highlight h3 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.pricing-highlight ul {
    margin: 25px 0;
    padding-left: 30px;
}

.pricing-highlight li {
    margin-bottom: 12px;
    color: var(--text-gray);
}

.cta-box {
    text-align: center;
    margin-top: 30px;
}

.availability {
    background-color: var(--bg-white);
}

.availability-content {
    max-width: 900px;
    margin: 0 auto;
}

.availability-content h3 {
    font-size: 24px;
    font-weight: 700;
    margin-top: 30px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.availability-content p {
    font-size: 17px;
    margin-bottom: 20px;
    color: var(--text-gray);
    line-height: 1.8;
}

.availability-content ul {
    margin: 20px 0;
    padding-left: 30px;
}

.availability-content li {
    margin-bottom: 12px;
    color: var(--text-gray);
}

.testimonials {
    background-color: var(--bg-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.testimonial-card {
    background-color: var(--bg-white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border-top: 4px solid var(--primary-color);
}

.testimonial-card p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-gray);
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    font-weight: 600;
    color: var(--text-dark);
}

.testimonials-note {
    margin-top: 40px;
    text-align: center;
    color: var(--text-gray);
    font-size: 14px;
    font-style: italic;
}

.discussion {
    background-color: var(--bg-white);
}

.discussion-content {
    max-width: 900px;
    margin: 0 auto;
}

.discussion-content p {
    font-size: 17px;
    margin-bottom: 25px;
    color: var(--text-gray);
    line-height: 1.8;
}

.discussion-topics {
    margin: 30px 0;
    padding-left: 30px;
}

.discussion-topics li {
    margin-bottom: 20px;
    color: var(--text-gray);
    line-height: 1.8;
}

.discussion-topics strong {
    color: var(--text-dark);
}

.faq {
    background-color: var(--bg-light);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--bg-white);
    padding: 30px;
    margin-bottom: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.faq-item h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.faq-item p {
    color: var(--text-gray);
    line-height: 1.8;
}

.cta-final {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--bg-white);
    text-align: center;
    padding: 100px 0;
}

.cta-final-content h2 {
    color: var(--bg-white);
    font-size: 40px;
    margin-bottom: 20px;
}

.cta-final-content p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
}

.footer {
    background-color: var(--text-dark);
    color: var(--bg-light);
    padding: 60px 0 30px;
}

.footer-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.disclaimer {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 30px;
    color: #d1d5db;
}

.copyright {
    font-size: 14px;
    color: #9ca3af;
    padding-top: 20px;
    border-top: 1px solid #374151;
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .hero {
        padding: 40px 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .hero-image {
        order: -1;
    }

    .section {
        padding: 50px 0;
    }

    .section h2 {
        font-size: 28px;
        margin-bottom: 30px;
    }

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

    .composition-list {
        grid-template-columns: 1fr;
    }

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

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .pricing-highlight {
        padding: 25px;
    }

    .cta-final {
        padding: 60px 0;
    }

    .cta-final-content h2 {
        font-size: 28px;
    }

    .cta-final-content p {
        font-size: 16px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .hero-text h1 {
        font-size: 36px;
    }

    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}